FCC ID: C8LBT6MBS

T6M Base Station User Guide Handbook Part Number: 31-360T6MBS Handbook Title:

T6M Base Station User Guide Handbook Part Number:

31-360T6MBS Issue Number:

Date of Issue:

Published by:

Telephone:

Fax:

one September 2000 Park Air Electronics Northfields Market Deeping Peterborough England From UK, 01778 345434 From outside UK, 44 1778 345434 From UK, 01778 342877 From outside UK, 44 1778 342877 T6M Base Station User Guide Page 2 Amendments to this User Guide, initiated by PAE, are recorded in the following table. Amendment Record Amendment Incorporated Date Brief Details Number by:

Modification Record Changes or modifications to the T6M base station that are not expressly approved by Park Air Electronics could void your authority to operate the equipment. Modifications to the T6M base station, authorized by PAE, are recorded in the following table. Modification Embodied by:

Date Brief Details Number T6M Base Station User Guide Page 3 SAFETY Warnings

[Failure to comply with warnings can result in personal injury, fire, or electric shock.]

q DO NOT operate equipment at high volume levels. Hearing experts advise against continuous high volume operation. If you experience ringing in your ears, reduce the volume level, or discontinue use. q The Radio module's power amplifier circuit contains beryllium oxide that can be extremely toxic. No instructions within this user guide remove any of the radio module's covers so users are not exposed to a potential beryllium hazard. If the radio module is to be disposed of, users must be aware of current disposal regulations regarding equipment containing beryllium. q The antenna used with this radio equipment must be installed such that the resultant radiated field strength is below 10 W/m in areas normally accessible to personnel. q The base station can be fitted with an optional internal battery. It is a sealed lead-acid type with a thixotropic electrolyte. The battery has self sealing safety vents that may release small quantities of gas under extreme conditions. Because of this, users must ensure that the enclosure's vents are always free from obstruction. FEDERAL COMMUNICATIONS COMMISSION (FCC) REGULATIONS q This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. q You are required to obtain a station licence before transmitting from your base station. q This equipment is only licenced for operation on 25 kHz channel spacing. Operation on 8.33 kHz channel spacing is not allowed within the USA. q The base station power output must not exceed the output necessary for satisfactory technical operation taking account of local conditions and the area to be covered. q The base station's frequency and parameters should be checked by authorized service personnel before use, and at least yearly thereafter. T6M Base Station User Guide Page 4 FOREWORD This user guide describes the purpose, installation, and operation of the Park Air Electronics (PAE) T6M base station. Read all instructions given in this user guide before operating the equipment. The following trademarks are used in this user guide. TRADEMARKS IBM Is a registered trademark of International Business Machines. Microsoft Is a registered trademark of Microsoft Corporation in the USA and other countries. Windows Is a registered trademark of Microsoft Corporation in the USA and other countries. T6M Base Station User Guide Page 5 SAFETY Federal Communications Commission (FCC) Regulations CONTENTS Foreword Trademarks Chapter 1 - Overview About this Handbook Associated Handbook Introduction to the T6M Base Station Facilities Remote Controllers Power Supplies Programming the Base Station's Personality Options Internal Battery Rack Mount Option Local Monitoring of Transmitted Audio Chapter 2 - Specification General Dimensions and Weight Input Supplies ac Supply dc Supply Optional Internal Battery Receive Circuit Transmit Circuit Chapter 3 - Operation Introduction Front Panel Controls Display Transmit Indicator Busy Indicator Power Indicator Microphone/Diagnostics Connector Volume Control External Tx Inhibit Indicator Battery Indicator Loudspeaker Grille PRI Button SQL Button SELs and SELt Buttons T6M Base Station User Guide Page 6 4 4 5 5 9 9 9 9 10 10 10 10 11 11 11 11 13 13 14 14 14 14 14 15 15 17 17 18 18 18 18 18 18 18 18 18 18 19 19 19 CHs and CHt Buttons SCN Button VOLs and VOLt Buttons Power Button Switching On and Off Operating the Base Station in Normal Mode Selecting Normal Mode Selecting a Channel Frequency Transmitting and Receiving Switching and Adjusting the Squelch Facility Operating the Base Station in Priority Mode Selecting Priority Mode Selecting a Priority Channel Frequency Transmitting and Receiving Operating the Base Station in Scan Mode Selecting Scan Mode Selecting a Scan Group Transmitting and Receiving Programmable Options Display Blanking Warning Beeps Key Beeps Transmit Inhibit Maximum Transmit Time Front Panel Display for 25 kHz and 8.33 kHz Channel Spacing Fault and Error Codes Chapter 4 - Installation Introduction Unpacking Setting Internal Links Siting the Base Station Connecting a T6M Controller to the Base Station Connecting an antenna Connecting the Chassis Stud to Earth Connecting a microphone Securing the Microphone Bracket Connecting External Facilities Connecting a dc Input Supply Connecting an ac Input Supply Connecting a PC to the Base Station Chapter 5 - Programming the Base Station Introduction Programmable Options Display Blanking 19 19 19 19 20 21 21 21 21 21 23 23 23 23 24 24 24 24 25 25 25 25 26 26 26 28 29 29 30 30 31 31 31 31 32 32 33 35 36 36 37 37 39 39 T6M Base Station User Guide Page 7 Warning Beeps Key Beeps Hold on Scan Mode Installing the Programming Software onto a Laptop, or PC Creating a New Personality Saving a Personality Opening a Saved Personality Loading a Personality into the Radio Reading a Personality from the Radio Printing a Personality Report Chapter 6 - Spares Introduction List of Spares Chapter 7 - Maintenance Scheduled Maintenance Test Equipment Required Test Lead Transmit Power and Frequency Accuracy Test Receiver Sensitivity Check Battery Replacement Fault Finding Replacing Modules Chapter 8 - Figures 39 39 40 40 40 44 45 45 45 46 47 47 47 49 49 49 49 50 52 52 53 55 57 T6M Base Station User Guide Page 8 Chapter 1 - Overview This chapter gives a brief overview of the T6M base station and its facilities. ABOUT THIS HANDBOOK This handbook describes the Park Air Electronics (PAE) T6M Base Station. Its purpose is to provide the information necessary for users to install, operate, and maintain the equipment to module level. To achieve this, the handbook is divided into eight chapters as follows:

Chapter 1. Gives a brief overview of the equipment and its facilities. Chapter 2. Provides the equipment specification. Chapter 3. Details the equipment's controls, indicators and connectors, and provides the operating instructions. Chapter 4. Provides detailed installation procedures and defines all interfaces. Chapter 5. Describes how the base station's personality can be changed. Chapter 6. Lists the spares available for the base station. Chapter 7. Gives maintenance information. Chapter 8. Contains the A3 size figures that are referred to throughout this user guide. Associated Handbook When reading this handbook it may be necessary to refer to the following handbook:

T6M Controller User Guide. Part number 31-3600T6MC. INTRODUCTION TO THE T6M BASE STATION The T6M multichannel base station provides two-way communication within the VHF aeronautical frequency band 118 to 136.9916 MHz. The radio provides a nominal 10 watt amplitude modulated (AM) output, and operates on both 25 kHz and 8.33 kHz spaced channel frequencies. A fist microphone, with an integral PTT switch, is provided for transmissions; received signals are monitored through the built-in loudspeaker. Before use, the radio's personality is programmed into its internal memory. The personality defines up to 760 channel frequencies, the required operating modes, and various secondary options. Three operating modes are available: Normal, Priority, and Scan. Normal Mode Priority Mode Scan Mode In normal mode, any channel frequency programmed into the base station can be selected using the front panel controls. Up to 760 channel frequencies can be programmed into the radio's personality. Priority mode allows faster access to frequently used channels. Up to 15 of the channel frequencies that are available in Normal mode can be programmed into the priority list. If scan mode is selected, the radio scans a number of pre-defined channels searching for a busy one. When a busy channel is found, and depending on the programmed options, the radio remains tuned to that channel. Up to 15 scan groups can be set up, each group containing up to 15 channel frequencies. T6M Base Station User Guide Page 9 FACILITIES A facilities connector is fitted to the base station's rear panel. It provides the following interfaces:

q Audio in/out and PTT control for connection to a Voice Communication and Control System

(VCCS). q Audio out for connection to a tape recording system. q An audio operated squelch signal that allows an external busy indication. q A transmit inhibit input signal. This input may be used to prevent the base station being keyed. REMOTE CONTROLLERS Up to four T6M Controllers can be connected to a base station. Each controller allows remote transmission and reception on the frequency currently selected at the base station. Full details of the controller are contained in the T6M Controller User Guide. POWER SUPPLIES The base station can operate from an ac mains supply, an external dc supply, or an internal battery (see Options on page 11). When both an ac and a dc supply are connected, the base station operates from the ac input; the dc input acts as a backup in case the mains fails. PROGRAMMING THE BASE STATION'S PERSONALITY The base station's personality is programmed into its internal memory and defines up to 760 channel frequencies, the required operating modes, and various secondary options. When the equipment is received from PAE, the personality is either:

q A personality programmed to the user's specific requirements. or, q A default personality that covers the 760 channels (25 kHz spaced) available in the VHF aeronautical frequency band. No frequencies are allocated to the priority list, and no scan groups are set. A programming kit is available from PAE. This allows a new personality to be programmed into the radio at any time. The kit comprises software loaded on a CD-ROM, and a programming lead. An IBM compatible laptop, or Personal Computer (PC) running Microsoft Windows 95 or 98 must be available to reprogramme the radio. To order the programming kit, contact PAE quoting part number 70-T6MPMKIT. T6M Base Station User Guide Page 10 OPTIONS Internal Battery An internal battery can be fitted to act as a backup should the ac mains supply fail. This option may be required when no external dc backup supply is available. The battery is float charged from the ac supply. If the mains fails, the battery provides a minimum two hours of operation, at 25C, provided the duty cycle does not exceed 10%. When operating from the internal battery, the transmit power output is reduced by up to 3 dB. When the battery option is fitted, link JP2 on the interface module must be correctly set (see Setting Internal Links in the installation chapter). Rack Mount Option The base station is normally supplied in a free-standing desktop polymer enclosure. As an option, the base station's chassis can be fitted in a metal enclosure suitable for 19 inch (483 mm) rack mounting. Local Monitoring of Transmitted Audio Normally, transmit and received audio is monitored through the base station's internal loudspeaker; this allows a base station operator to monitor both sides of voice traffic when remote controllers are being used. Alternatively, the equipment can be configured so that only receiver audio is monitored through the loudspeaker. This facility is enabled by setting link JP1 on the interface module (see Setting Internal Links in the installation chapter). T6M Base Station User Guide Page 11 Intentionally Blank T6M Base Station User Guide Page 12 Chapter 2 - Specification Chapter 2 gives the specification of the T6M base station. GENERAL The general parameters of the T6M base station are listed below. Operation Operating modes Channel bandwidth Simplex VHF AM transmit and receive. Normal, priority, and scan. 25 kHz and 8.33 kHz. Frequency range (at 25 kHz) Between 118 and 136.975 MHz. Frequency range (at 8.33 kHz) Frequency stability Channel selection Duty cycle (receive) Duty cycle (transmit) Between 118 and 136.9916 MHz. 1.5 ppm In Normal mode up to 760 channel frequencies can be programmed into the radio. The channels can have 25 kHz spacing, 8.33 kHz spacing, or a mixture of both. Priority mode allows up to 15 of the stored channels to be allocated to a priority list. Channel selection can then be limited to those frequencies in the priority list. In Scan mode, the radio can have up to 15 scan groups each containing up to 15 channel frequencies. Continuous. 25% with a maximum transmit time of 5 minutes. A longer transmit time, or a higher duty cycle, reduces the output power by up to 6 dB. When the base station operates from the optional internal battery, a duty cycle above 10% rapidly discharges the battery (see Optional Internal Battery on page 14). Operating temperature range Between -20C and +55C. Storage temperature range Between -40C and +70C. Humidity Cooling Can be operated in humidity up to 80%. Fan assisted air flow. Fan turns on at approximately 40C; the fan's speed increases as temperature increases. T6M Base Station User Guide Page 13 DIMENSIONS AND WEIGHT The dimensions and weight of the base station fitted within the standard enclosure are:

Width Height Depth Weight 446 mm. 176 mm. 400 mm. 9.5 kg without battery option fitted. 11.5 kg with battery option fitted. The dimensions and weight of the rack mounted base station are:

Width Height Depth Weight 483 mm. 89 mm (2U). 423 mm. 9 kg without battery option fitted. 11 kg with battery option fitted. INPUT SUPPLIES The base station can operate from an ac mains supply, or an external dc input supply. When both supplies are connected, the dc supply acts as a backup supply should the mains fail. ac Supply The base station requires the following ac input supply:

Input voltage Maximum current dc Supply Between 98 and 254 V ac at either 50 or 60 Hz. 2 A. The base station requires the following dc input supply:

Input voltage Between 12 and 15.5 V. For maximum transmitter output power, the dc input must be between 14 and 15.5 V. Maximum current 9 A. OPTIONAL INTERNAL BATTERY An optional internal battery can be fitted to power the base station when external supplies fail. The battery provides:

Voltage Operating time 12 V dc. The battery provides at least two hours of operation when the duty cycle does not exceed 10% (measured at a working temperature of 25C). The transmitter output power is reduced by up to 3 dB during battery operation. T6M Base Station User Guide Page 14 RECEIVE CIRCUIT The specification of the receive circuit is listed below. Sensitivity Selectivity

-104 dBm at 30% modulation depth for 10 dB (S+N):N. 8.33 kHz spaced: <6 dB at 3 kHz; >60 dB at 8.33 kHz. 25 kHz spaced: <6 dB at 8.5 kHz; >70 dB at 25 kHz. Intermodulation suppression Spurious response suppression

>70 dB.

>80 dB. Audio power output 2 W into 8 ohm integral speaker (<10% THD). Distortion

<10% THD for 90% modulation depth. RF input impedance 50 ohms. TRANSMIT CIRCUIT The specification of the transmit circuit is listed below. RF output power Adjustable between approximately 5 and 12 W. Spurious Harmonics Modulation depth RF load impedance Frequency stability

<-46 dBm when more than 1 MHz from the carrier.

<-36 dBm. Up to 85%. Compression above 85% to prevent over modulation. 50 ohms. 1.5 ppm. T6M Base Station User Guide Page 15 Intentionally Blank T6M Base Station User Guide Page 16 Chapter 3 - Operation This chapter gives the instructions for operating the base station after it has been correctly installed. Users should note that the facilities available to an operator depend on how the radio's personality has been configured. INTRODUCTION The base station provides transmission and reception on any 25 kHz, or 8.33 kHz, spaced channel frequency within the VHF aeronautical frequency band between 118 and 136.9916 MHz. However, only those frequencies and operating modes that are pre-programmed into the radio can be selected. The radio can be reprogrammed at any time using the supplied software. Instructions for doing this are given in chapter 5 starting on page 37. Three operating modes are available: Normal, Priority, and Scan. In Normal mode, any frequency programmed into the system can be selected using the radio's front panel controls. Priority mode is similar to Normal mode, but allows faster selection of up to 15 frequently used channels. In Scan mode, the radio scans a number of pre-defined channels searching for a busy one. When a busy channel is found, and depending on the programmed options, the radio remains tuned to that channel ready for use. Scanning can be resumed at any time. When a T6M base station is received from PAE, the personality is either:

q A personality programmed to the user's specific requirements. or, q A default personality that covers the 760 channels (25 kHz spaced) available in the VHF aeronautical frequency band. No frequencies are allocated to the Priority list, and no scan groups are set. A programming kit is available from PAE. This allows a new personality to be programmed and downloaded. The radio does not have to be removed from its installed position to download a new personality. Note that operation using 8.33 kHz channel spacing is not currently allowed within the USA. The following topics are covered in this chapter:

q Description of front panel controls and indicators; page 18. q Switching on and off; page 20. q Operating the base station in normal mode; page 21. q Operating the base station in priority mode; page 23. q Operating the base station in scan mode; page 24. q Programmable options; page 25. q Front panel display for 25 kHz and 8.33 kHz channel spacing; page 26. q Fault and error codes; page 28. T6M Base Station User Guide Page 17 FRONT PANEL CONTROLS Display

(Figure 3, Item 1). Priority mode, the display shows the channel frequency but alternates to show a P every few seconds. In Normal mode, the display shows the currently selected channel frequency. In In Scan mode, and when the radio is scanning, the display shows Scn and the currently selected scan group (a number between 1 and 15). When a busy channel is found, the channel's frequency is displayed. The display, in the event of a detected unserviceability, shows fault and error codes. Transmit Indicator

(Figure 3, Item 2). A red indicator that lights when the transmitter is keyed and producing power. Busy Indicator

(Figure 3, Item 3). A yellow indicator that lights when a signal, of sufficient strength to overcome the squelch circuit, is received. This indicator is always lit when the squelch facility is switched off. Power Indicator

(Figure 3, Item 4). A green indicator that lights when the radio is switched on by pressing the front panel Power button. The front panel Power button cannot be operated unless the rear panel power switch is set to on. Note that when the radio is switched off using the front panel Power switch, and the rear panel switch remains at on, the internal battery (if fitted) continues to charge. Microphone/Diagnostics Connector

(Figure 3, Item 5). A 7-pin DIN socket used to connect the fist microphone normally supplied with the base station. This connector will also accept a microphone/headset; the connector's pin-out is shown on page 32. This socket is also used to connect the base station to a laptop, or PC, so that the base station's personality can be programmed. Volume Control

(Figure 3, Item 6). A rotary control used to adjust the volume of the internal loudspeaker. The control has an integral switch: when the control is pushed in, the loudspeaker is switched on; when the control is pulled out, the loudspeaker is switched off. External Tx Inhibit Indicator

(Figure 3, Item 7). A red indicator that flashes when the external Tx inhibit facility is active. When active, the transmitter cannot be keyed on any frequency. External Tx Inhibit is set, if required, by physically connecting pin 14 on the rear panel Facilities connector to earth (see Connecting External Facilities in chapter 4). Battery Indicator

(Figure 3, Item 8). This indicator is used only when the internal battery option is fitted. When the battery is charging, the indicator is amber. When the battery is charged to approximately 75% of its maximum, the indicator changes to green. Loudspeaker Grille

(Figure 3, Item 9). The base station's internal loudspeaker is fitted behind this grille. T6M Base Station User Guide Page 18 PRI Button

(Figure 3, Item 10). The Priority button is used to select Priority mode operation. This mode can only be selected when it is programmed into the base station's personality. The Priority button is also used in the sequence to enter Test mode. SQL Button

(Figure 3, Item 11). Used to switch the squelch facility on and off; it must be switched on before the squelch level is adjusted by using the VOLs and VOLt buttons . The Squelch button is also used in the sequence to enter Test mode. SELs and SELt Buttons

(Figure 3, Item 12). The Select buttons have different functions for different operating modes. In Normal mode, the select buttons skip through the programmed channel frequencies 10 channels at a time. These buttons are used in conjunction with the CHs and CHt buttons to select the required channel frequency. In Priority mode, these buttons are used to select the required Priority channel frequency. In Scan mode, these buttons are used to select the required scan group. These buttons are also used in the sequence to enter Test mode and as a coarse adjustment when setting the transmitter's output power. CHs and CHt Buttons

(Figure 3, Item 13). The Channel buttons have different functions for different operating modes. In Normal mode, the channel buttons are used to select, the required channel frequency. In Scan mode, these buttons are used to resume scanning after a busy channel has been found and the radio is paused, or on hold. These buttons are also used as a fine adjustment when setting the transmitter's output power. SCN Button

(Figure 3, Item 14). This button is used to switch on and off Scan mode. The scan button is also used in the sequence to enter Test mode. VOLs and VOLt Buttons

(Figure 3, Item 15). The Vol buttons are used to adjust the receiver's squelch threshold. These buttons do not adjust the loudspeaker volume. Power Button

(Figure 3, Item 16). The power button is used to switch on and off power to the radio circuits. When using this switch, it must be pressed, and kept pressed for approximately one second until the front panel display shows On or Off. Note... In addition to the front panel Power button, there is also a Power on/standby switch fitted on the rear panel (see Switching On and Off on page 20). Warning!

Neither the Power button, nor the rear panel Power switch, isolates the input supply from the equipment. Lethal voltages are still present in the base station's internal power supply. To ensure safe working during maintenance, the ac and dc input supplies must be disconnected from the base station. T6M Base Station User Guide Page 19 SWITCHING ON AND OFF To switch on the base station:

(1)

(2)

(3) Ensure the Supply switch fitted to the base station's rear panel is set to on. Note that there is no front panel indication as to whether the rear panel supply switch is on or set to standby. Press the front panel Power button for approximately one second until the display reads On. Then release the button. Check that a warbling sound is heard for a few seconds and then a channel frequency is displayed.

(4) The base station is now ready for use. To switch off the base station, press the Power button until the display reads Off. Then release the button. Note that this action removes power only from the radio module; power to other modules is removed when the rear panel Supply switch is set to standby. Warning!

Neither the Power button, nor the rear panel Power switch, isolates the input supply from the equipment. Lethal voltages are still present in the base station's internal power supply. To ensure safe working during maintenance, the ac and dc input supplies must be disconnected from the base station. Note ... Always switch off the rear panel Power switch, and allow at least 10 seconds, before disconnecting the ac and dc supply connectors. If this is not done, when next switched on the base station may revert to previous channel and mode settings, and not those that were active immediately before switching off. Base Station Front Panel Power Button Location T6M Base Station User Guide Page 20 OPERATING THE BASE STATION IN NORMAL MODE Operating the base station in Normal mode requires the following operations. Each operation is explained in following paragraphs.

(1)

(2)

(3) Select Normal mode if not currently selected. Select the required channel frequency. Transmit using the fist microphone, and receive using the base station's internal loudspeaker.

(4) Adjust, if necessary, the Squelch facility. Selecting Normal Mode Normal mode is active when neither Priority mode or Scan mode is selected. If Priority mode is selected, the display shows P every few seconds. If Scan mode is selected the display shows Scn when scanning, or the frequency when locked onto a busy channel. To select Normal mode if currently in Priority or Scan mode:

q To select Normal mode if currently in Priority mode, press the CHL or CHM button. q To select Normal mode if currently in Scan mode, press the SCN button. Selecting a Channel Frequency To select the required channel frequency, press the CHL or CHM button to scroll up or down through the channel frequencies that are programmed into the base station. Release the button when the required frequency is displayed. In conjunction with the CHL and CHM buttons, the SELL and SELM buttons can be used to step 10 channels at a time. Transmitting and Receiving To key the transmitter press the fist microphone's PTT button. Check that the base station's Tx indicator lights, and then speak clearly into the microphone. Reception is heard through the base station's internal loudspeaker. The volume is adjusted using the front panel's rotary Volume control that must be pushed in to switch on the loudspeaker. Users should note that the VOLL and VOLM buttons do not adjust the volume. When a signal is received, the base station's busy indicator lights if squelch is switched on; if squelch is switched off, the busy indicator is permanently lit. Switching and Adjusting the Squelch Facility The base station has an adjustable squelch facility that can also be turned on and off. The squelch facility, when correctly set, mutes unwanted background noise when no signals are being received. During normal use of the base station the squelch facility should be switched on. After initially setting the squelch level, there should be no reason to adjust it unless a problem is evident. The symptoms of an incorrectly adjusted squelch level are:

q Background noise is continuously, or intermittently heard when no signals are being received. If this is the case, the setting is too low. q Weak signals (signals below the squelch threshold) are not being received. If this is the case, the setting is too high. These operating procedures assume the fist microphone that is normally supplied with the base station is being used. As an alternative to the fist microphone, a microphone/headset can be used. T6M Base Station User Guide Page 21 To Switch On the Squelch To switch on the squelch facility:

(1)

(2)

(3) Press the SQL button. Check that the display shows an S and the current level (a number between 1 and 20). Check that after a few seconds the display changes to show the currently selected channel frequency. The squelch facility is now on. To Switch Off the Squelch To switch off the squelch facility:

(1)

(2)

(3)

(4)

(5) Press the SQL button. Check that the display shows an S and the current level (a number between 1 and 20). Press the SQL button while the display is showing S and the current level. Check that the display shows S OFF. Check that after a few seconds the display changes to show the currently selected channel frequency. The squelch facility is now off. To Adjust the Squelch Level To adjust the squelch facility:

(1)

(2)

(3)

(4) Press the SQL button. Check that the display shows an S and the current level (a number between 1 and 20). Press the VOLL button to increase the squelch threshold, or the VOLM button to decrease it. The squelch should be set to the lowest threshold setting (a number between 1 and 20) that eliminates background noise when no signal is being received. After the required setting is selected, press no more buttons and check that after a few seconds the display changes to show the currently selected channel frequency. The squelch facility is now set. T6M Base Station User Guide Page 22 OPERATING THE BASE STATION IN PRIORITY MODE Priority mode allows faster access to frequently used channel frequencies. Up to 15 channel frequencies can be programmed into the base station's priority list. The Priority facility must be programmed into the base station before it can be selected, or used. Operating the base station in Priority mode requires the following operations. Each operation is explained in following paragraphs.

(1)

(2)

(3) Select Priority mode if not currently selected. Select the required channel frequency. Transmit using the fist microphone, and receive using the base station's internal loudspeaker. Selecting Priority Mode Select Priority mode by pressing the PRI button. When selected, the display shows P every few seconds. Selecting a Priority Channel Frequency To select the required channel frequency, press the SELL or SELM button to scroll up or down through the priority channel frequencies that are programmed into the base station. Release the button when the required frequency is displayed. Transmitting and Receiving To transmit, key the transmitter by pressing the fist microphone's PTT button. Check that the base station's Tx indicator lights, and then speak clearly into the microphone. Reception is heard through the base station's internal loudspeaker. The volume is adjusted using the front panel's rotary Volume control that must be pushed in to switch on the loudspeaker. Users should note that the VOLL and VOLM buttons do not adjust the volume. When a signal is received, the base station's busy indicator lights if squelch is switched on; if squelch is switched off, the busy indicator is permanently lit. If the squelch facility requires adjusting, use the procedure Switching and Adjusting the Squelch Facility given on page 21. T6M Base Station User Guide Page 23 OPERATING THE BASE STATION IN SCAN MODE In this mode the base station scans a number of pre-defined channel frequencies searching for a busy one. When a busy channel is found, the base station provides reception on that channel. The Scan facility must be programmed into the base station before it can be selected, or used. Note A channel is defined as busy when it is receiving a signal strong enough to override the squelch setting. What happens after a busy channel is found depends on how the base station is programmed. There are two possible options: Hold and Pause. q If Hold is programmed, the base station remains tuned to the busy channel until the CHL button is pressed to resume scanning. q If pause is programmed, the base station remains tuned to the busy channel for six seconds, then automatically resumes scanning. If during the six seconds the radio is keyed, or the CHL button is pressed, the base station remains tuned to the busy channel; scanning does not resume until the CHL button is pressed again. The base station can be programmed with up to 15 scan groups, each containing up to 15 channel frequencies. Squelch is automatically switched on when scan mode is selected. Display blanking does not operate in scan mode. Selecting Scan Mode To select Scan mode, press the SCN button. Check that the display shows Scn and a number between 1 and 15; the number corresponds to the currently selected scan group. Selecting a Scan Group When in Scan mode, the required scan group (a number between 1 and 15) is selected by pressing the SELL or SELM button. Transmitting and Receiving To transmit when the scan function is on hold, or pause, key the transmitter by pressing the fist microphone's PTT button. Check that the base station's Tx indicator lights, and then speak clearly into the microphone. Reception is heard through the base station's internal loudspeaker. The volume is adjusted using the front panel's rotary Volume control that must be pushed in to switch on the loudspeaker. Users should note that the VOLL and VOLM buttons do not adjust the volume. When a signal is received, the base station's busy indicator lights if squelch is switched on; if squelch is switched off, the busy indicator is permanently lit. If the squelch facility requires adjusting, use the procedure Switching and Adjusting the Squelch Facility given on page 21. T6M Base Station User Guide Page 24 PROGRAMMABLE OPTIONS A number of options can be programmed into the radio's personality. The options are detailed in the following paragraphs. Display Blanking Display blanking is applicable only to Normal and Priority modes; not Scan mode. When display blanking is programmed, the radio's normal frequency display is replaced by a flashing bar if the radio is not keyed during the display blanking time period (between 10 and 300 seconds). Example, Display blanking is programmed Display blanking time is 60 seconds Selected channel frequency is 121.500 MHz. In this example, the display normally shows 121.500. If the transmitter is not keyed for 60 seconds, the display changes to a flashing bar. Normal frequency display is reinstated when the radio is keyed, or when the VOLL or VOLM button is pressed. Note that the display can be reinstated by pressing any other button, but doing so may also alter other settings. Warning Beeps When programmed, the following conditions cause a warning beep to be heard when an attempt is made to key the transmitter:

q The radio has a fault that prevents transmissions. q Trying to key the radio on a channel frequency that has the Transmit Inhibit option set to Always Inhibit. q Trying to key the radio on a busy channel that has the Inhibit if Busy option selected. q Imminent transmitter time out. The volume of warning beeps is set in the personality (a value between 1 and 7); the front panel volume control does not affect the beeps. Key Beeps This option, when programmed, produces a single beep whenever a button is pressed on the radio's front panel. The volume of the beep is the same as the Warning beep. T6M Base Station User Guide Page 25 Transmit Inhibit Any frequency programmed into the radio can be made receive only. To achieve this, the transmit function on the channel is always inhibited, or the transmit facility can be inhibited only when the channel is busy. If warning sounds have been set, a warning is heard when an attempt is made to key the transmitter. Maximum Transmit Time A maximum continuous transmit time can be programmed into the radio's personality. The options are:

q No limit. q A limit that can be set between 30 and 300 seconds. q If a limit has been set, and warning sounds have been set, the radio produces warning beeps 10 seconds before the transmission time expires. FRONT PANEL DISPLAY FOR 25 kHz AND 8.33 kHz CHANNEL SPACING When selecting an 8.33 kHz channel frequency, the displayed frequency differs from the actual channel frequency. Table 1 on page 27 shows the pattern used for 25 kHz and 8.33 kHz spaced channel frequencies from 118.0000 MHz to 118.1916 MHz. The pattern is the same for any frequency within the radio's frequency range. The display conforms to ICAO convention for 8.33 kHz operation. Note that operation using 8.33 kHz channel spacing within the USA is not currently allowed under FCC regulations. T6M Base Station User Guide Page 26 Table 1. Display for 25 kHz and 8.33 kHz Channel Spacing Actual Frequency

(to 4 decimal places) 118.0000 MHz 118.0000 MHz 118.0083 MHz 118.0166 MHz 118.0250 MHz 118.0250 MHz 118.0333 MHz 118.0416 MHz 118.0500 MHz 118.0500 MHz 118.0583 MHz 118.0666 MHz 118.0750 MHz 118.0750 MHz 118.0833 MHz 118.0916 MHz 118.1000 MHz 118.1000 MHz 118.1083 MHz 118.1166 MHz 118.1250 MHz 118.1250 MHz 118.1333 MHz 118.1416 MHz 118.1500 MHz 118.1500 MHz 118.1583 MHz 118.1666 MHz 118.1750 MHz 118.1750 MHz 118.1833 MHz 118.1916 MHz Channel Spacing 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz 25 kHz 8.33 kHz 8.33 kHz 8.33 kHz Displayed Frequency at Radio's Front Panel 118.000 MHz 118.005 MHz 118.010 MHz 118.015 MHz 118.025 MHz 118.030 MHz 118.035 MHz 118.040 MHz 118.050 MHz 118.055 MHz 118.060 MHz 118.065 MHz 118.075 MHz 118.080 MHz 118.085 MHz 118.090 MHz 118.100 MHz 118.105 MHz 118.110 MHz 118.115 MHz 118.125 MHz 118.130 MHz 118.135 MHz 118.140 MHz 118.150 MHz 118.155 MHz 118.160 MHz 118.165 MHz 118.175 MHz 118.180 MHz 118.185 MHz 118.190 MHz T6M Base Station User Guide Page 27 FAULT AND ERROR CODES A number of fault and error codes are shown on the radio's display if an internal fault is detected. The codes and their meaning are detailed in Table 2. Table 2. Fault and Error Codes Displayed Fault or Error Code Title Meaning F1 F2 F4 F8 F16 F32 Synthesiser failure An internal fault on the synthesiser has been detected. Switch off the base station and switch on again after a few minutes. If the fault persists, refer to Maintenance in chapter 7. Unstable output An internal fault on the power amplifier has been detected. Switch off the base station and switch on again after a few minutes. If the fault persists, refer to Maintenance in chapter 7. Over temperature High reflected power Low supply voltage High supply voltage This condition may occur if the transmitter's duty cycle has been exceeded, or when transmitting for long periods. The fault should clear if the radio is not keyed and allowed to cool. Indicates a faulty antenna, antenna cable, or RF connector. These two faults indicate the internal power supply is faulty. Switch off the base station and switch on again after a few minutes. If the fault persists, refer to Maintenance in chapter 7. Fault code F16 may be displayed when operating using the battery option and the battery starts to run flat. This error is displayed when the base station is initially switched on and no personality information, or corrupted personality information, is detected. Refer to Programming the Base Station on page 37 and load a personality into the base station. cErr Critical error T6M Base Station User Guide Page 28 Chapter 4 - Installation The instructions in this chapter should be followed, in the order given, to install the T6M base station. INTRODUCTION Warning. Lethal Voltages!

The instructions given in this chapter involve connecting lethal voltages to the equipment. The instructions, therefore, must be carried out only by suitably qualified personnel. Warning. Unauthorized Modifications!

Changes, or modifications, made to this equipment that are not expressly approved by Park Air Electronics, or parties authorized by Park Air Electronics, could void the users authority to operate the equipment. Warning. Antenna Radiation!

The antenna used with this radio equipment must be installed such that the resultant radiated field strength is below 10 W/m in areas normally accessible to personnel. Installing the base station involves the following operations. Each operation is detailed in this chapter of the user guide. q Unpacking and checking the installation kit is complete. q Setting (if necessary) internal links. q Siting the base station. q Connecting one, or more, RCUs to the base station (if required). q Connecting an antenna. q Connecting the base station chassis to earth. q Connecting the microphone (or a microphone/headset). q Connecting external facilities (if required) to the base station. q Connecting a dc input supply (if required). q Connecting a mains supply (if required). q Connecting a PC, or laptop, so that the base station's personality can be modified. Before the base station is put into operational service, the required personality information should be programmed in. This information, includes channel frequencies and operating modes. When a T6M base station is received from PAE, the personality is either:

q A personality programmed to the user's specific requirements. or, q A default personality that covers the 760 channels (25 kHz spaced) available in the VHF aeronautical frequency band. No frequencies are allocated to the Priority list, and no scan groups are set. A programming kit is available from PAE. This allows a new personality to be programmed and downloaded. The base station does not have to be removed from its installed position to download a new personality.

[Note that operation using 8.33 kHz channel spacing is not currently allowed within the USA.]

T6M Base Station User Guide Page 29 UNPACKING When the base station is received from PAE, remove the packaging and check that the items listed in Table 3 are included. Table 3. Installation Materials Item Number Description Quantity PAE Part Number 1 2 3 4 Base station complete with enclosure Microphone terminated with 7-pin DIN plug 2 metres of mains cable terminated with a 3-pole socket (mates with AC input plug) 15-way D-type plug (mates with Facilities socket) comprising:

Plug connector Cover 1 1 1 1 1 BT6MBS 24-11030301 17-03000038S 20-01150100 20D09150101 If ordered, a programming kit may be included. This kit, part number 70-T6MPMKIT, comprises:

q CD containing the software. q Base station to PC connecting cable. SETTING INTERNAL LINKS Two internal links must be correctly set before the base station is used. Both links are factory set, but may require checking if a replacement Interface module is fitted during the life of the base station. The two links are:

q Interface module JP1. This link determines whether received audio, or transmitted and received loudspeaker (see Local Monitoring of Transmitted audio, is monitored through the internal Audio on page 11). q Interface module JP2. This link is set to correspond with the internal battery being fitted, or not fitted. When a base station is received from PAE, the links are normally set as per the user's requirements. If there are any doubts, however, check the links as follows:

(1)

(2)

(3)

(4) Refer to Figure 5 that shows the base station in its enclosure. Remove and retain the six M4 pan head screws and associated washers that secure the equipment within the enclosure. Slide the equipment forward out of the enclosure. Refer to Figure 8 and identify the Interface PCB. Refer to Figure 11 and identify links JP1 and JP2. Ensure the two links are set to the required positions. Slide the equipment back into its enclosure. Refit the six M4 securing screws and washers. T6M Base Station User Guide Page 30 SITING THE BASE STATION Site the base station away from sources of heat and in a position that allows access to the rear panel connectors and the On/Standby switch. If your base station is a rack mounted version, refer to Figure 2 and fit into an equipment rack either on telescopic slides, or fixed runners. CONNECTING A T6M CONTROLLER TO THE BASE STATION Up to four T6M Controllers can be connected to a base station. Users should refer to the T6M Controller User Guide (part number 31-3600T6MC) for installation details. The controllers are terminated on any of the base station's four RCU connectors. Figure 4 shows the interconnections. The pin-out of the RCU connector is given in Table 4. Table 4. RCU Connector Pin-Out RCU Connector Pin Number Signal 1 2 3 4 5 6 7 8 9 Ground Line +

Line -

PTT (0 V active) Not connected Not connected Not connected Not connected Not connected CONNECTING AN ANTENNA Warning. Antenna Radiation!

The antenna used with this radio equipment must be installed such that the resultant radiated field strength is below 10 W/m in areas normally accessible to personnel. A suitable antenna must be connected to the base station's rear panel Antenna connector (see Figure 1). An N-type plug should be used to connect the feeder cable; the connector is designed to accept UR67 or RG213 coaxial cable that has an overall diameter of approximately 10 mm. Figure 12 shows the RF cable to N-type connector termination. A suitable connector is PAE part number 19-01030301. CONNECTING THE CHASSIS STUD TO EARTH is fitted to the base station's rear panel. When using the rack mounted A chassis stud, marked version of the base station, and in order not to compromise the equipments EMC the chassis stud must be connected to the equipment rack or the system earth. The connection should be made using a single tri-rated, green-and-yellow cable having a cross-sectional area of 2.5 mm2. The cable should have CSA and UL1015 approval, and be connected to the chassis stud through an M6 eyelet. T6M Base Station User Guide Page 31 CONNECTING A MICROPHONE The supplied fist microphone (Table 3, item 2) plugs directly into the base station's front panel Microphone/Diagnostics connector. The pin-out of connections used for the fist microphone circuit. the Microphone/Diagnostics connector is given in Table 5. Figure 4 shows the As an alternative to the fist microphone, a microphone/headset can be used. The receiver audio monitor

(Table 5 pin 5) should be used as the headset connection. Table 5. Base Station Microphone/Diagnostics Socket Pin-Out Pin Number Signal Input or Output Signal Level 1 2 3 4 5 6 7 Microphone ground Input RS232 Tx Output Microphone PTT RS232 Rx Sidetone and receiver audio monitor Input Input Output 0 V RS232 0 V = PTT RS232 Maximum 1 V rms. Rout = 200 W Microphone audio Input Passive microphone Ground

0 V SECURING THE MICROPHONE BRACKET A mounting bracket is supplied with each fist microphone (see illustration on the next page). The bracket should be fitted to any convenient vertical surface, noting that the coiled microphone lead extends from approximately 400 mm to 1200 mm. Two screws secure the bracket to the chosen surface. The actual bracket should be used as a template for drilling the two screw holes. T6M Base Station User Guide Page 32 Fist Microphone CONNECTING EXTERNAL FACILITIES Four optional external facilities can be connected to the base station. They are:

q An audio output to drive an external tape recorder. q Transmit audio, received audio, and PTT lines for use with a control desk. q A transmit inhibit signal. q An audio operated squelch signal. The external facilities are connected to the base station's rear panel Facilities connector. This connector is detailed in Table 6. A 15-way D-type plug (Table 3, item 4) is provided to make the facilities connections. Connection to the plug should be made using screened cable; the braid should be connected to the plug's shell as shown in the illustration on page 35. T6M Base Station User Guide Page 33 Table 6. Base station Facilities Connector Pin-Out Base Station's Facilities Connector Pin Number Signal Input or Output Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Ground Tape +

Tape -

Audio operated squelch

0 V. Output Output Control Desk Rx +

Control Desk Rx -

Output Control Desk Tx +

Control Desk Tx -

Control Desk PTT +

Control Desk PTT -

Input Input A balanced 600 W twisted pair providing audio to drive a tape recording system. The output level is 0 dBm

(sine wave on 600 W

) for 85% modulation depth. 0 V when received audio having a modulation depth

>20% is present. Open circuit at other times. This signal can be used as an external busy indication. A 6-wire system comprising two 600 W twisted pair balanced lines for Rx and Tx audio, plus a line pair for PTT. The audio line levels are 0 dBm (sine wave on 600 W

) for 85% modulation depth. PTT can be activated either by shorting together the PTT lines, or by phantom keying on the Tx lines. Note that Control Desk PTT - is internally connected to 0 V. Not connected Not connected Not connected

External Tx inhibit Input When this line is connected to 0 V, the base station cannot be keyed. Ground

0 V. T6M Base Station User Guide Page 34 Cable Braid Connection to D-Type's Shell CONNECTING A DC INPUT SUPPLY The base station can operate using a 12 to 15.5 V dc input supply, or it can be used as a backup to the mains ac input. The DC Input connector fitted to the rear panel (see following illustration) is used for this supply. Connection should be made using a free XLR socket;

for example, PAE part number 20-01030106. DC Input Connector T6M Base Station User Guide Page 35 CONNECTING AN AC INPUT SUPPLY An ac input supply must be connected to the base station using the supply connector provided (Table 3, item 3). The free end of the cable should be terminated with a connector suitable for the local mains supply. The T6M base station is a class 1 equipment. The ac supply cable must have a green-and-yellow protective earthing conductor electrically connected to the protective earthing terminal of the equipment connector, and the supply output connector. The ac supply cable should be colour coded in accordance with the electrical appliance (colour code) regulations for the UK. That is:

Line:

Neutral:

Earth:

Brown Blue Green-and-yellow Connections are shown below. Base Station's Chassis AC Connector CONNECTING A PC TO THE BASE STATION the base station's personality, the microphone is disconnected from the To modify Microphone/Diagnostics connector and is replaced by an RS232 cable connected to a laptop, or PC. The cable is part of the T6M programming kit, part number 70-T6MPMKIT. Figure 4 shows the connections used for the RS232 cable. T6M Base Station User Guide Page 36 Chapter 5 - Programming the Base Station This chapter describes how a personality is compiled and then downloaded into the base station's internal memory. INTRODUCTION During manufacture, the base station is programmed with a default personality, or with a personality as per the user's requirements. Note A personality is the programme that defines the radio's channel frequencies, operating modes, and other options. A new personality can be compiled and loaded into the radio at any time using the programming kit

(70-T6MPMKIT) available from PAE. The kit contains CD-ROM based software and a programming lead. A laptop computer, or PC, must be available to compile the personality. The following topics and procedures are detailed in this chapter:

q Programmable options (see page 39). q Installing the programming software onto a laptop computer, or PC (see page 40). q Creating a new personality (see page 40). q Saving a personality (see page 44). q Opening a saved personality (see page 45). q Loading a personality into the radio (see page 45). q Reading a personality from the radio (see page 45). q Printing a personality report (see page 46). T6M Base Station User Guide Page 37 Table 7. Programming Options Option Range Default Notes Display blanking On or off Off See Display Blanking on page 39. Display blanking time 10 to 300 seconds Maximum transmit time 30 to 300 seconds, or 0 (unlimited) Hold on scan mode On or off Key beeps On or off Warning beeps On or off Warning beep volume 1 to 7 Personality description 46 character alphanumeric string 60 seconds See Display Blanking on page 39. 180 seconds Limits the maximum continuous transmit time. On On On 3 See Hold on Scan Mode on page 40. See Key Beeps on page 39. See Warning Beeps on page 39. See Warning Beeps on page 39. Empty string A free format text string that defines the radios personality. Use channel strings Yes or no No Defines whether channel frequencies are to include descriptive strings. Selecting Yes for this option reduces the maximum number of channels that can be stored from 760 to 400. Busy on time 0.1 to 5 seconds 0.5 seconds Squelch must be open for this time before a channel is considered to be busy. Offset channels On or off On When set to on, the radio scans for the strongest frequency within a 25 kHz channel. Always set to On. Frequency 118.000 to 136.9916 MHz 760 (25 kHz spaced) channels from 118.000 to 136.975 MHz Enter this in ICAO format (see Table 1 on page 27);

this format automatically defines the frequency and the bandwidth. Priority channel Yes or no No Up to 15 channels can be defined as priority channels. Scan group Transmit inhibited Identification string Base 1 to 15 or not assigned Never inhibit Always inhibit Inhibit if busy 16 character alphanumeric string Enabled or disabled No scan groups assigned Up to 15 channels can be assigned to each of 15 scan groups. A channel frequency can be included in more than one group. Never inhibit This option can be used to prevent the radio transmitting on any particular channel frequency. Empty string A free format text string that describes the channel frequency. Disabled Must be enabled for correct operation of the base station. T6M Base Station User Guide Page 38 PROGRAMMABLE OPTIONS A number of programmable options can be set in the base station's personality. These are listed in Table 7. The following paragraphs provide further explanation regarding display blanking, warning beeps, key beeps, and hold on scan. Display Blanking Display blanking is applicable only to Normal and Priority modes; not Scan mode. When display blanking is enabled, the radio's normal frequency display is replaced by a flashing bar if the radio is not keyed during the display blanking time period. Example, Display blanking is enabled Display blanking time is 60 seconds Selected channel frequency is 121.500 MHz. In this example, the display normally shows 121.500. If the transmitter is not keyed for 60 seconds, the display changes to a flashing bar. Normal frequency display is reinstated when the radio is keyed, or when the VOLL or VOLM button is pressed. Note that the display can be reinstated by pressing any other button, but doing so may also alter radio settings. Warning Beeps When enabled, the following conditions cause a warning beep to be heard when an attempt is made to key the transmitter:

q The radio has a fault that prevents transmissions. q Trying to key the radio on a channel frequency that has the Transmit Inhibit option set to Always Inhibit. q Trying to key the radio on a busy channel that has the Inhibit if Busy option selected. q Imminent transmitter time out. The volume of warning beeps is set in the personality (a value between 1 and 7); the front panel volume control does not affect the beeps. Key Beeps This option, when enabled, produces a single beep whenever a button is pressed on the radio's front panel. The volume of the beep is the same as the Warning beep. T6M Base Station User Guide Page 39 Hold on Scan Mode When in scan mode, what happens after a busy channel programmed. There are two possible options: Hold and Pause. is found depends on how the radio is q If Hold is programmed, the radio remains tuned to the busy channel until the CHL button is pressed to resume scanning. q If pause is programmed, the radio remains tuned to the busy channel for six seconds, then automatically resumes scanning. If during the six seconds the radio is keyed, or the CHL button is pressed, the radio remains tuned to the busy channel; scanning does not resume until the CHL button is pressed again. INSTALLING THE PROGRAMMING SOFTWARE ONTO A LAPTOP, OR PC The programming software is supplied on a CD-ROM. The software should be installed onto a laptop computer, or PC, running Windows 95 or 98. To install the software:

(1)

(2)

(3) Insert the CD-ROM into the computer's CD drive. From Windows Explorer, select Setup.exe. the CD-ROM drive, and run the programme called Follow the on-screen instructions. The programming files are stored in the directory C:\Program Files\PAE unless a different directory is specified during installation. Icons, and an uninstall programme are automatically created during installation. CREATING A NEW PERSONALITY This procedure creates a new personality for use by the radio. The personality includes all channel frequencies, operating modes and programmable options that are required when the radio is in operational use. When the personality has been compiled, it can be loaded into the radio's memory by connecting the laptop (or PC) to the radio using the programming lead. To create a new personality:

(1)

(2) At the laptop (or PC) run the PAE programmer software. Check that the General page (see page 41) is displayed. If the Frequencies page is displayed, select the General tab. From the menu-bar select File then New. This action resets all options to the default value and clears all entries, except one, in the frequency table. T6M Base Station User Guide Page 40

[Note that the status line at the bottom of the page displays help messages when the mouse pointer is placed over a programmable option.]

General Page

(3) Use Channel Strings. Decide if you wish to store descriptive text for any of the channel frequencies that will be programmed. If you do, use the mouse to ensure the box is checked. If you do not wish to use this facility, use the mouse to ensure the box is empty. Notes If the Use Channel Strings facility is selected, the maximum number of channel frequencies that can be stored is reduced from 760 to 400. Descriptive text is shown on the frequency list within this programme; it is not displayed at the radio. T6M Base Station User Guide Page 41

(4)

(5)

(6) Maximum Transmit Time. This setting alters the maximum time the transmitter can be keyed. Key in a value between 30 and 300 (seconds), or if no limit is required, enter 0. If a limit has been set, and warning beeps are set, a warning is heard 10 seconds before the radio stops transmitting. Display Blanking. Display blanking is described on page 39. If you require this facility use the mouse to ensure the box is checked. If you do not wish to use this facility, use the mouse to ensure the box is empty. Display Blanking Time. Enter a number between 10 and 300 (seconds). This is the time used when the display blanking facility is selected to be active. Display blanking is described on page 39.

(7) Warning Beeps. Warning beeps, as described on page 39, can be set to on or off. To set them to on use the mouse to ensure the box is checked. To switch them off, ensure the box is empty.

(8) Warning Beep Volume. The volume of warning beeps (if used) is represented by a figure between 1 and 7. Enter the required value in the box.

(9) Hold in Scan Mode. This facility, which is only applicable to scan mode, is explained on page 40. When this box is checked, hold in scan mode is selected; if not checked, pause in scan mode is selected.

(10) Busy On Time. This is the time a radio must be busy, when scan mode is selected, before the radio holds, or is paused. Enter a value between 0.1 and 5 seconds.

(11) Key Beeps. When key beeps are enabled, a single beep is heard whenever a button is pressed on the radio's front panel. The volume of the beep is the same as the Warning beep. To enable this facility, check the box; to disable it, ensure the box is empty.

(12) Base. This check box must always display a tick. If it does not have a tick (unchecked), the base station will not operate correctly.

(13) COM1 or COM2 Selection. Either Com port 1, or Com port 2, can be selected from the drop-down menu. This selection determines which Com port on the laptop, or PC, the radio must be connected to when transferring the personality to the radio.

(14) Offset Channels. The offset channels box should always be checked. This is one of the radio's internal characteristics. It does not refer to offset frequency channels as defined by ICAO.

(15) Personality Description. A unique name for the personality can be entered here (maximum of 46 characters).

(16) When all fields on the General page are correctly configured, use the mouse and click on the Frequencies tab. Check that the Frequencies page is shown (see next page). T6M Base Station User Guide Page 42 Frequencies Page

(17) When the Frequencies page is first selected there will be one default frequency shown. If this frequency is required leave it as it is; if not, click in the frequency box and change the frequency to that required. Note Enter frequencies in ICAO format. The software recognizes the frequency and appropriate channel spacing (Width). There is no need to manually enter the channel spacing. The ICAO format is illustrated on page 27.

(18)

(19) If the frequency is required to be included in the Priority list, key in Y in the priority column. If not required, ensure the column reads No. If the frequency is required to be included in a Scan group, enter the scan group number

(between 1 and 15) in the scan group column. If the frequency is to be included in more than one scan group, enter the group numbers, separating each with a comma. Note that up to 15 frequencies can be included in each scan group.

(20) The Tx inhibit facility must now be set for the frequency. This facility determines when the radio can transmit. Three options are allowed:

q Never. Key in N. This means the inhibit function is never enabled. The transmitter can be keyed at any time, including at times when the channel is busy. q Busy. Key in B. This means the inhibit function is enabled when the channel is busy. The transmitter can however be keyed at all other times. q Always. Key in A. This means the inhibit function is always enabled. The channel is therefore receive only and the transmitter can never be keyed.

(21) If the Channel String option was selected from the General page, descriptive text (maximum of 16 characters) can be keyed into the Identity column.

(22) One frequency channel entry is now complete. Further channels can be entered in the same way by clicking on the Add channel box. To delete any entered channel, highlight the frequency and click on the Delete channel box. When all the required frequency channels have been entered, click on the Verify and sort the table box. Any errors made when compiling the frequencies page are automatically identified to the user. T6M Base Station User Guide Page 43

(23) As an alternative to manually entering frequency channels, and when many channels must be entered, a range of frequencies can be entered. To do this, click on the Fill table box and check that the Add channels sub-page is displayed. Add Channels Sub-Page

(24) From the Add channels sub-page, enter the first and last frequencies in the required range. From the drop-down menu, select the channel spacing (bandwidth); this can be 25 kHz, 8.33 kHz, or both. From the drop-down menu select the Transmit inhibit condition (Always, Never, or Busy). When complete, click on the Add channels box. After the list of frequencies is displayed on the Frequencies page, any individual frequency can be amended, for example adding it to the priority list, as required. When all the required frequency channels have been entered, click on the Verify and sort the table box. Any errors made when compiling the frequencies page are automatically identified to the user.

(25) When a lot of frequencies are entered and it is required to amend the entry, for example adding it to the priority list, a quick method of displaying the frequency is by clicking on the Find channel box. This displays the Find frequency sub-page. Enter the frequency on the sub-page and click on Find it. The frequency is then displayed on the Frequencies page. After amending the entry, click on the Verify and sort the table box. Any errors made are automatically identified to the user. Find Frequency Sub-Page SAVING A PERSONALITY When a personality has been compiled, it should be saved. To do this:

(1) From the programming menu, select File, then Save As.

(2) When the Save As window is displayed enter a file name for the personality. The file name must have the extension .PER.

(3)

(4) Click on Save to store the personality. Before the save process, automatically checked for any errors. If errors do exist they are highlighted to the user. the personality is If the save is successful, the file name appears at the top of the programming window. At any time, the personality can be edited and saved using the same filename. T6M Base Station User Guide Page 44 OPENING A SAVED PERSONALITY To open a previously saved personality:

(1)

(2) From the programming menu, select File, then Open. Select one of the personality files and click on Open. LOADING A PERSONALITY INTO THE RADIO Use the following procedure to load a personality into the radio:

(1)

(2)

(3)

(4)

(5)

(6) Switch off the laptop (or PC) and the radio. the radio, disconnect At programming lead. the microphone from the front panel. Replace it with the Connect the other end of the programming lead to the laptop's (or PC's) Com port 1 or Com port 2. Note that the appropriate port is set in the personality. The connected port must match that stated in the personality. Check, and amend if necessary. Switch on the laptop and then the base station (laptop must be switched on before the base station). At the base station check that Pr is shown on the front panel display. Ensure the programming software is running and display the required personality on screen. From the programming menu-bar select Program radio and then Personality. The programmer automatically verifies the personality is valid and downloads it to the radio. If it is not valid the nature of the error will be displayed. The progress of the programming operation is displayed on the status line at the bottom of the programming screen. When programming is complete, switch off the radio and laptop, remove the programming lead, reconnect the radio's microphone and restore the equipment ready for operational use. READING A PERSONALITY FROM THE RADIO To read a personality from the radio:

(1)

(2)

(3)

(4)

(5)

(6) Switch off the laptop (or PC) and the radio. the radio, disconnect At programming lead. the microphone from the front panel. Replace it with the Connect the other end of the programming lead to the laptop's (or PC's) Com port 1 or Com port 2. Note that the appropriate port is set in the personality. The connected port must match that stated in the personality. Check, and amend if necessary. Switch on the laptop and then the base station (laptop must be switched on before the base station). At the base station check that Pr is shown on the front panel display. Ensure the programming software is running. From the programming menu-bar select Read radio and then Personality. The progress of the read operation is displayed on the status line at the bottom of the programming screen. When complete, switch off the radio and laptop, remove the programming lead, reconnect the radio's microphone and restore the equipment ready for operational use. T6M Base Station User Guide Page 45 PRINTING A PERSONALITY REPORT A personality can be printed as follows:

(1)

(2)

(3) From the programming menu, select Report, then Generate. The programmer automatically verifies the personality is valid. If it is not valid the nature of the error will be displayed. A textual representation of programme. When Notepad displays the personality it can be saved as a text file, or printed. the personality is displayed using the Windows Notepad Previously saved Notepad files containing personalities can be retrieved by selecting Report, then Open from the menu-bar. T6M Base Station User Guide Page 46 Chapter 6 - Spares INTRODUCTION The base station is manufactured using surface mount technology. Because of this, and the specialist test equipment required to set up the circuits, spares are limited to modules and components as listed below. LIST OF SPARES The following spares are available from PAE. When ordering, the part number should always be quoted. T6M base station (complete) BT6MBS Radio module Interface module Switched mode power supply unit Reservoir capacitor 33000 m F 63 V Fan, dc, 12 V operation Loudspeaker, 4 W, 4 ohm Fuse 5 A anti-surge, 20 mm

(located in ac connector) Fuse 15 A, size 0 (dc input) Microphone Optional battery Programming kit (includes CD-ROM and programming lead) 25F00000T6M 68-T6MBS635 69F07150135S 14-06339200 69F12120612 04F05509034 29F01140102S 29-01350201 24-11030301 06F30012300 70-T6MPMKIT T6M Base Station User Guide Page 47 Intentionally Blank T6M Base Station User Guide Page 48 Chapter 7 - Maintenance This chapter details the scheduled maintenance required by the T6M base station. It also provides fault finding guidance. SCHEDULED MAINTENANCE Scheduled maintenance to the T6M base station involves the following checks:

(1)

(2)

(3) Transmit power and frequency accuracy test. This check should be carried out annually. Receiver sensitivity check. This check should be carried out annually. Battery replacement (applicable only to base stations fitted with the internal battery option). The life of the battery depends upon its usage; refer to Battery Replacement on page 52. Test Equipment Required The test equipment necessary to complete the scheduled maintenance is listed in Table 8. Table 8. List of test equipment Item Description Through-line wattmeter. 20 dB attenuator (>15 W continuous power rating). VHF Frequency counter. RF signal generator. AF wattmeter. Test lead for connecting the base station to the AF wattmeter. [See next heading.]

1 2 3 4 5 6 Test Lead The test lead (Table 8, item 6) connects the base station to the AF wattmeter during receiver sensitivity tests. The lead connections are detailed in Table 9. Table 9. Test Lead Connections 7-Pin DIN Plug

(connects to base station's Microphone connector) Pin 5, receiver audio monitor Pin 7, earth Input 0 V AF Wattmeter Connector T6M Base Station User Guide Page 49 Transmit Power and Frequency Accuracy Test To check the base station's transmit power, and the accuracy of the carrier frequency, carry out the following procedure:

(1) Isolate power from the base station and connect the test equipment as shown below. Ensure the wattmeter is switched to forward power. Transmit Power and Frequency Accuracy Test - Test Equipment Connection

(2)

(3) Reconnect the power and ensure the base station's rear panel Power switch is set to on. To enter Test mode switch on the base station by pressing, and keeping pressed, the front panel Power button. Without releasing the Power button, press and release the SQL button, then the SCN button, and finally the PRI button. Release the Power button. Base Station Front Panel Power Button Location T6M Base Station User Guide Page 50

(4)

(5) Check that the display shows tESt and after a few seconds it changes to show the current power level setting (a number between 1 and 240 representing approximately 6 to 12 watts). Press the SQL button to select the test frequency 127.500 MHz. The test frequency is displayed for a couple of seconds and the display then reverts to the power setting. Note Using the SQL key to select a test frequency always selects a 25 kHz spaced channel. Squelch is automatically switched off in Test mode.

(6) Key the transmitter and note the wattmeter's reading.

(7) With the transmitter de-keyed, use the CHs and CHt buttons to increment or decrement the power setting in steps of 1. Alternatively, use the SELs and SELt buttons to increment or decrement the power setting in steps of 10. Then key the transmitter and note the wattmeter's reading. The power setting cannot be adjusted when the transmitter is keyed. Adjust the power output until the required power is set (nominally 8 watts). Note The transmit indicator lights when the transmitter is keyed. If a fault is detected, the indicator does not light. No fault codes, however, are displayed in Test mode.

(8)

(9) Key the transmitter and check that the frequency counter reads between 127.499808 and 127.500192 MHz. To save the new power setting in the base station's memory, press and keep pressed the front panel Power button. Without releasing the Power button, press and release the PRI button, then the SCN button, and finally the SQL button.

(10) When the new setting is saved, the display shows S and two short beeps are heard. Release the Power button.

(11) To switch off without saving the new power setting, press and release the Power button. The display shows nS and a single long tone is heard.

(12) Enter test mode again by pressing, and keeping pressed, the front panel Power button. Without releasing the Power button, press and release the SQL button, then the SCN button, and finally the PRI button. Release the Power button.

(13) Check that the display shows tESt and after a few seconds it changes to show the current power level setting.

(14) Press the SQL button to select the test frequency 118.000 MHz.

(15) Key the transmitter and check that the wattmeter reads between 6 and 12 watts. Check that the frequency counter reads between 117.999823 and 118.000177 MHz.

(16) Press the SQL button to select the test frequency 136.975 MHz.

(17) Key the transmitter and check that the wattmeter reads between 6 and 12 watts. Check that the frequency counter reads between 136.974745 and 136.975205 MHz.

(18) On completion, switch off the base station and disconnect the test equipment. Restore the base station ready for operational use. T6M Base Station User Guide Page 51 Receiver Sensitivity Check To check the base station's receiver sensitivity carry out the following procedure:

(1) Isolate power from the base station and connect the test equipment as shown below. Receiver Sensitivity Test - Test Equipment Connection

(2)

(3)

(4)

(5)

(6)

(7)

(8) Reconnect the power and ensure the base station's rear panel Power switch is set to on. Adjust the signal generator to operate at 118.000 MHz with an RF level of -100 dBm and a 1 kHz tone modulated at 30%. At the base station's front panel press the squelch (SQL) button. Check that the display shows an S and a number between 1 and 20. This number is the squelch level setting. Adjust the squelch level, by pressing the VOLs and VOLt buttons, until the display shows a level of 2. Adjust the volume control until a reference reading (approximately mid-scale) is shown in the AF wattmeter. Note the reading in dB. Set the signal generator's modulation to off. Increase the sensitivity of the AF wattmeter until a reading is obtained. Note the reading in dB.

(9) Check that the difference in readings noted in steps (6) and (8) are not less than 10 dB.

(10) Repeat steps (3) to (9) for test frequencies of 127.500 MHz and 136.975 MHz.

(11) On completion, switch off the base station and disconnect the test equipment. Restore the base station ready for operational use. Battery Replacement An optional battery can be fitted to act as a backup supply if the mains supply fails. The lead acid battery is fitted in the position shown in Figure 8. The battery should be replaced after a period of time that depends on usage. Table 10 details the replacement period according to usage. T6M Base Station User Guide Page 52 Table 10. Battery Replacement Battery Usage Replacement After Not used. Battery kept fully charged. 8 years. Battery used until fully discharged (that is, 2 hours use at 10% duty cycle). 60 discharges. Battery used for approximately 1 hour at 10% duty cycle (50% discharge). 120 partial discharges. Battery used for approximately 30 minutes at 10% duty cycle (25% discharge). 240 partial discharges. Battery used for approximately 10 minutes at 10% duty cycle (10% discharge). 600 partial discharges. FAULT FINDING Warning!

Neither the Power button, nor the rear panel Power switch, isolates the input supply from the equipment. Lethal voltages are still present in the base station's internal power supply. To ensure safe working during maintenance, the ac and dc input supplies must be disconnected from the base station. The T6M base station contains the following replaceable modules (see Figures 6, 7, and 8):

q A T6M radio module (a self-contained transceiver). q An interface module that interconnects the various external signals, and the power supplies, to the radio module. q A switched mode power supply (SMPS). The base station's modules are manufactured using surface mount technology. Because of this, and the specialist test equipment required to set up the circuits, spares are limited to modules and components as listed on page 47. The following table gives help in fault diagnosis. T6M Base Station User Guide Page 53 Table 11. Fault Diagnosis Symptom Check No front panel indicators lit. Check input supplies. Fault, or error code displayed at front panel. Transmit Transmit inhibit indicator flashing. function not operating correctly. Transmit function not operating correctly. No fault code displayed. Check ac supply input connector) and dc supply fuse. fuse (located in rear panel ac Check output of switched mode power supply (SMPS). This should be +15.6 V dc (wrt 0 V) at TP21 (located next to CN10) of the Interface PCB (see Figures 7 and 11). If the SMPS is suspect, remove it from the base station and test it on the workbench ensuring a load is connected across its output. Fault and error codes are displayed on the front panel to indicate faults detected by the radio module. These codes are detailed in Table 12. External transmit inhibit facility is deliberately or inadvertently enabled. This facility is enabled when pin 14 on the base station's Facilities connector is grounded (see Table 6 on page 34. Complete the Transmit Power and Frequency Accuracy Test detailed on page 50. If the test fails, check for any obvious problems such as a faulty PTT switch. Note also that the signal from the microphone connector passes through the Interface module before being connected to the radio module

(see Figures 6 and 7). If the signals are correct at the radio input, then change the radio module. Receive function not operating correctly. No fault code displayed. If some signals are not being received, refer to the operating instructions and check the squelch level is correctly set. Complete the Receiver Sensitivity Check on page 52. If the test fails, use Figures 6 and 7 to determine where the fault lies. For example, audio out of the radio module can be monitored at the Interface module connector CN8 pins 3 and 7. The Interface module's audio output to the loudspeaker can then be monitored on CN7 pins 13 and 14. Using Figures 6 and 7 should enable the fault to be diagnosed to either the radio module, or the Interface PCB. If the Receiver Sensitivity Check is OK, the fault is probably in the antenna system. T6M Base Station User Guide Page 54 Table 12. Fault and Error Codes Displayed Fault or Error Code Title Meaning F1 F2 F4 F8 F16 F32 Synthesiser failure An internal fault on the synthesiser has been detected. Switch off the base station and switch on again after a few minutes. If the fault persists, replace the radio module with a serviceable spare. Unstable output An internal fault on the power amplifier has been detected. Switch off the base station and switch on again after a few minutes. If the fault persists, replace the radio module with a serviceable spare. Over temperature This condition may occur if the transmitter's duty cycle has been exceeded, or when transmitting for long periods. The fault should clear if the radio is not keyed and allowed to cool. High reflected power Indicates a faulty antenna, antenna cable, or RF connector. Check the antenna circuit and replace any unserviceable component. Low supply voltage High supply voltage These two faults indicate the internal power supply is faulty. Switch off the base station and switch on again after a few minutes. If the fault persists, replace the power supply module with a serviceable spare. Fault code F16 may be displayed when operating using the battery option and the battery starts to run flat. cErr Critical error This error is displayed when the base station is initially switched on and no personality information, or corrupted personality information, is detected. Refer to Programming the Base Station on page 37 and load a personality into the base station. REPLACING MODULES If it is necessary to remove a module, refer to the following figures for guidance:

q Figure 8 Base station layout diagram q Figure 9 Radio module and PSU removal q Figure 10 Interface PCB and reservoir capacitor removal. Modules are accessed as follows:

(1) Refer to Figure 5 that shows the base station in its enclosure. Remove and retain the six M4 pan head screws and associated washers that secure the equipment within the enclosure.

(2) Slide the equipment out of the enclosure. Note that when fitting a new Interface module, two links must be correctly set. Refer to Setting Internal Links on page 30. T6M Base Station User Guide Page 55 Intentionally Blank T6M Base Station User Guide Page 56 Chapter 8 - Figures This chapter contains the A3 size figures referred to throughout this user guide. 1 2 3 4 5 6 7 8 9 10 11 12 Front and rear layout Rack mounted version Key to front panel controls External connection diagram Enclosure securing detail Base station block diagram Base station interconnection diagram Base station layout diagram Radio module and PSU removal Interface PCB and reservoir capacitor removal Interface PCB layout diagram Cable termination at the N-type connector T6M Base Station User Guide Page 57 Intentionally Blank T6M Base Station User Guide Page 58 BT6MBS-01 Front and Rear Layout Figure 1 BT6MBS-13 Rack Mounted Version Figure 2 GA10642 Iss. 1 For description of controls, see text in chapter 3. Key to Front Panel Controls Figure 3 BT6MBS-11 External Connection Diagram Figure 4 BT6MBS-10 Enclosure Securing Detail Figure 5 GA10547 Iss. 3 Base Station Block Diagram Figure 6 GA10548 Iss. 3 Base Station Interconnection Diagram Figure 7 GA10719 Iss. 1 Base Station Layout Diagram Figure 8 Radio Module GA10721 Iss. 1 (radio) and GA10731 Iss. 1 (PSU) Radio Module and PSU Removal Figure 9 Power Supply Unit (PSU) Interface PCB GA10732 Iss. 1 and GA10720 Iss. 1 Reservoir Capacitor Interface PCB and Reservoir Capacitor Removal Figure 10 GA10751 Iss 1 Interface PCB Layout Diagram Figure 11 BT6MBS-12-1 Cable Termination at the N-Type Connector Figure 12