FCC ID: OW4-BC407521 4075 HF High Power Transmitter Package 1000 Watt

Operating and Installation Manual Barrett 4075 Linear Amplifier BCM407500/10 Barrett Communications Head Office:

Barrett Communications Pty Ltd 47 Discovery Drive, Bibra Lake, WA 6163 Australia Tel: +61 8 9434 1700 Fax: +61 8 9418 6757 Email: information@barrettcommunications.com.au www.barrettcommunications.com.au Contents Introduction .............................................................................................................. 4 Terms and Abbreviations ...................................................................................................4 Exploring the 4075 Linear Amplifier ........................................................................ 5 Front Panel .........................................................................................................................5 Keypad ...............................................................................................................6 Rear Panel ..........................................................................................................................6 Switching the Linear Amplifier On / Off ................................................................... 8 Switching the Linear Amplifier On ....................................................................................8 Switching the Linear Amplifier Off ...................................................................................8 Error States ............................................................................................................... 9 Display .................................................................................................................... 10 Main Menu .......................................................................................................................10 Configuration Menu .........................................................................................................10 1 - Exciter .........................................................................................................11 2 - ATU .............................................................................................................11 3 - AUX .............................................................................................................11 4 - Optical ........................................................................................................11 5 - Network ......................................................................................................11 6 - Language ....................................................................................................12 7 - Other ..........................................................................................................12 8 - Factory Reset ...............................................................................................13 Diagnostics Menu ............................................................................................................14 1 - Clear Critical Error .......................................................................................16 2 - Filter Control Menu .....................................................................................16 3 - Attenuation Control ....................................................................................17 4 - Power Relay Control ....................................................................................18 5 - Power Supply Control .................................................................................18 6 - Pallet 0 Control ...........................................................................................19 7 - Pallet 1 Control ...........................................................................................20 8 - Fan Control Menu .......................................................................................21 9 - Pump Control ..............................................................................................22 10 - Bypass Lock On Control .............................................................................22 2 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Installation and Setup ............................................................................................ 23 Safety ...............................................................................................................................23 Getting Started ................................................................................................................23 Mains Connection ............................................................................................................23 Ground (Earth) System ....................................................................................................25 Land System Grounding ...................................................................................25 Marine System Grounding ................................................................................26 Corrosion ....................................................................................................26 Antenna Connection ........................................................................................................27 Fitting the Linear Amplifier .............................................................................................27 4050 Transceiver Setup....................................................................................................27 4075 System Connections ................................................................................................28 4075 Connections - Rear View .........................................................................29 System Description ..........................................................................................................31 In Standby (Receive) Mode (No PTT) .................................................................31 In Transmit Mode (PTT Active) ..........................................................................31 Operation Settings .................................................................................................. 32 Factory Settings ...............................................................................................................32 System Settings ...............................................................................................................32 Maintenance ....................................................................................................................33 4075 - Specifications ............................................................................................... 34 General .............................................................................................................................34 Mechanical .......................................................................................................................35 Environmental .................................................................................................................35 Controls and Indicators ...................................................................................................35 Connectors (Front) ...........................................................................................................36 Connectors (Rear) ............................................................................................................36 Protection .........................................................................................................................36 Limited 3 Year Warranty Statement ....................................................................... 37 Warranty Registration and Technical Support ....................................................... 38 Warranty Registration Contact Details ...........................................................................39 3 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Introduction The Barrett 4075 is a solid-state linear amplifier operating from 1.6 MHz to 30 MHz. It can be supplied with a power output level of either 500 watts or 1000 watts. Extensive self-test, system monitoring, and protection circuits are provided, with status and tuning information being displayed on a large OLED display. The exciter for the 4075 linear amplifier is a Barrett 4050 Transceiver set to 4075 Linear Amplifier as the antenna type, where its power output is reduced to a maximum of 30 W, and 40 W above 20 MHz. The ALC voltage for the exciter is derived at the Linear Amplifiers output, and is passed to the exciter via the Breakout Box. The Barrett 4075 Power Supply Unit provides the +48 volts required to power the amplifier. Terms and Abbreviations Term / Abbreviation Definition BoB CW dB dBc dBm LPF OLED PEP PTT Selcall SSB USB VSWR Breakout Box Continuous Wave (used for Morse code) Decibels Decibels relative to the carrier - is the power ratio of a signal to a carrier signal, expressed in decibels. Power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW). Low Pass Filter Organic Light Emitting Diode Peak Envelope Power Press-To-Talk button Selective Calls Single Sideband (a transmission format) Universal Serial Bus Voltage Standing Wave Ration 4 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Exploring the 4075 Linear Amplifier Front Panel PWR LED illuminates green when the unit is powered on. TX LED illuminates amber when the unit is transmitting (PTT on) OLED screen FLT LED illuminates red when the unit identifies a fault LOG LED illuminates blue when logging the fault history Grill and filter for the fans LEDs to indicate transmit (amber) and receive (green) USB socket for programming and diagnostics Keypad 5 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Keypad There are seven keys on the keypad. Some keys have multiple functions assigned to them depending on when the key is pressed and for how long the key is pressed. Key functions are listed below followed by a description of their functions. Key Function Channel Up /

Scroll up Channel Down /

Scroll down Scroll left Scroll right Rear Panel Key ENT PWR ESC Function Enter /

Set a menu item On / Off button Escape /

Back one step 15 14 6 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL RF Out 48 V for Amplifier Cooling fan /grill RF In 12 V Power Supply from 4022 2050 interface 4050 Breakout Box Interface Auxiliary input. Used if other equipment is far away. Alarms etc USB Interface. Used for programming and diagnostics Ethernet network interface Optic Fibre ATU Interface Control connector for Power Supply 14 15 Drain Plug Earth connection 7 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Switching the Linear Amplifier On / Off Switching the Linear Amplifier On PWR to switch the unit Press on. The Barrett splash screen dis-

plays. BARRETT 4075 LINEAR AMPLIFIER After two seconds the default screen displays showing various values. Current: 1.19 A Voltage: 49 V Last VSWR: 0.00 Use the scroll keys and to display more values. ESC Press Menu. to display the Main Freq: 0.00 Cur0: 1.12 A Band: 7 Cur1: 0.12 A Out PWR: 0 W Pal0T N/A ATTEN: 10 dB Pal1T: 32.2C Switching the Linear Amplifier Off Momentarily press for five seconds to switch the unit off. PWR 8 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Error States There are three types of error states that may be encountered during opera-

tion. These are:

Warning The following message displays accompanied by an audible alarm and a flashing red LED. This flashing message will con-

tinue until the fault condition clears. No user intervention is required. Error The following message displays accompanied by an audible alarm and a flashing red LED. This flashing message will con-

tinue until the fault condition clears or a key is pressed on the keypad. The LED will continue to flash but the navigational keys will now be operable. Critical Error The following message displays accompanied by an audible alarm and a flashing red LED. The critical error will cause the Linear Amplifier to shut down. However, the message and LED will continue to flash until the Escape key is pressed. If the critical error is cleared, select Yes to continue. See page 16 for further information. ERROR!

WARNING ERROR!

ERROR ERROR!

CRITICAL ERROR Hit ESC to continue Clear Error?

Confirm Update? YES NO YES 9 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Display Main Menu From the Main Menu, Press either the selection up or down. or to move ENT Press to select either the Configuration Menu or Diag-

nostics Menu. Configuration Menu From the Configuration Menu, press either to move the selection up or down. or ENT Press quired menu. to select the re-

MAIN MENU 1 - Configuration Menu 2 - Diagnostics Menu

> LINEAR CONFIG MENU 1 - Exciter 2 - ATU 3 - AUX

< > LINEAR CONFIG MENU 4 - Optical 5 - Network 6 - Language

< LINEAR CONFIG MENU 7 - Other 8 - Factory Reset 10 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 1 - Exciter Use this option to select which exciter to use with the 4075 Linear Amplifier. Alternative custom exciters

(programmable) can be used. Select Exciter from the Config-

uration Menu to display the following. Press the selection up or down. or to move ENT Press to set the selection.

> Exciter MENU 1 - Set 4050 2 - Set 2050 3 - Set Custom 1

< Exciter MENU 4 - Set Custom 2 5 - Set Custom 3 2 - ATU N/A. Press ESC to return to the previous menu. 3 - AUX N/A. Press ESC to return to the previous menu. 4 - Optical N/A. Press ESC to return to the previous menu. 5 - Network N/A. Press ESC to return to the previous menu. 11 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 6 - Language N/A. Press ESC to return to the previous menu. 7 - Other Select Other from the Config-

uration Menu to display the following. Press the selection up or down. or to move ENT to display the select-

Press ed menu. Buzzer Control This option enables or disables the audio alarms. Select Buzzer Control from the Other Menu to display the following. Press selection on or off. and to toggle the

> Other 1 - Buzzer Control 2 - Blocking Region Buzzer Control ON/OFF ON ENT to display the Confir-

Press mation screen. A confirmation screen displays. or Press to toggle the selection Yes or No to confirm and return to the Other Screen. Confirm Update? YES NO YES 12 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Blocking Region Use this option to block pro-

grammable regions. Alterna-

tively, select none. Select Blocking Region from the Other Menu to display the following. Press the selection up or down. or to move ENT Press to set the selection. 8 - Factory Reset Use this option to revert all the values to the default. Select Factory Reset from the Configuration Menu to display the confirmation screen. Press selection Yes or No. or to toggle the ENT Press boot the Linear Amplifier. to confirm and re-

> BLOCKING REGION MENU 1 - Region 1 2 - Region 2 3 - Region 3

< BLOCKING REGION MENU 4 - Region 4 5 - Region 5 6 - None Confirm? YES NO YES 13 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Diagnostics Menu A passcode is required to enter the Diagnostic menu. Select the Diagnostics menu from the Main Menu to display the Passcode screen. The passcode consists of four digits. The underscore rep-

resents the selected digit. To increment or decrement the value of the selected digit, press respec-

tively. To move to a different selected digit, or Passcode: 0000 press either left or right respectively. or to move ENT to enter the pass-

Press code. If the entered passcode is in-

correct, the following message displays. ESC Press code screen. to return to the Pass-

If the entered passcode is correct, the following message displays momentarily for two seconds. ESC Press nostic menu. to display the Diag-

14 Incorrect Passcode WARNING:

Incorrect usage may damage amplifier BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL From the Diagnostics Menu, press either to move the selection up or down. or ENT Press quired menu. to select the re-

> DIAGNOSTICS MENU 1 - Clear Critical Error 2 - Filter Control Menu 3 - Attenuation Control

< > DIAGNOSTICS MENU 4 - Power Relay Control 5 - Power Supply Control 6 - Pallet 0 Control

< > DIAGNOSTICS MENU 7 - Pallet 1 Control 8 - Fan Control Menu 9 - Pump Control

< DIAGNOSTICS MENU 10 - Bypass Lock ON Control 15 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 1 - Clear Critical Error Select Clear Critical Error, when the error raising the alarm has been fixed. This will reset the Error State. See page 9 for further information. 2 - Filter Control Menu Select Filter Control from the Diagnostics Menu to display the following. Press the selection up or down. or to move

> FILTER CONTROL MENU BYPASS TOGGLE ON Filter 1 (1.60-2.48 MHz) OFF Filter 2 (2.48-3.84 MHz) OFF F:7,DUMP:RX,SYSBYPASS:RX Press selection on or off. or to toggle the ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 16 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 3 - Attenuation Control Select Attenuation Control from the Diagnostics Menu to display the following. Press the selection up or down. or to move Select > to advance though the menu for more options, or select < to return to the previ-

ous menu. ENT to accept the set-

Press ting. The chosen attenuation is displayed on the last line of the display.

> ATTENUATION CONTROL MENU 1 - Set 0dB Attenuation 2 - Set 3dB Attenuation 3 - Set 6dB Attenuation ATTEN: ATTEN_6DB

< > ATTENUATION CONTROL MENU 4 - Set 9dB Attenuation 5 - Set 10dB Attenuation 6 - Set 13dB Attenuation ATTEN: ATTEN_10DB

< ATTENUATION CONTROL MENU 7 - Set 16dB Attenuation 8 - Set 19dB Attenuation ATTEN: ATTEN_10DB 17 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4 - Power Relay Control Select Power Relay Control from the Diagnostics Menu to display the following. Enables or disables the external 48 V Power Supply. PS48vON/OFF: ON Press selection on or off. or to toggle the ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 5 - Power Supply Control Select Power Supply Control from the Diagnostics Menu to display the following. The external power supply consists of three modules. Use this menu to enable or dis-

able the individual modules. Power Supply Control Menu 1 - Module 0 2 - Module 1 3 - Module 2 Press the selection up or down. or to move ENT Press ting. to accept the set-

18 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 6 - Pallet 0 Control Select Pallet 0 Control from the Diagnostics Menu to display the following. The Power Amplifier consists of two pallets. Use this menu to enable or disable Pallet 0. Pal0 ON/OFF: ON Press selection on or off. or to toggle the ENT Press to confirm and dis-

play the Confirmation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 19 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 7 - Pallet 1 Control Select Pallet 1 Control from the Diagnostics Menu to display the following. The Power Amplifier consists of two pallets. Use this menu to enable or disable Pallet 1. Pal1 ON/OFF: ON Press selection on or off. or to toggle the ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 20 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 8 - Fan Control Menu Select Fan Control from the Diagnostics Menu to display the following. The Fan Control menu enables the three fans to be switched on or off independently or together. Press the selection up or down. or to move Press selection on or off. or to toggle the The illustration opposite shows that the status of Fan 0 is on. Press selection on or off. or to toggle the

> FAN CONTROL MENU 1 - FAN 0 Control 2 - FAN 1 Control 3 - FAN 2 Control

> FAN CONTROL MENU 4 - FAN 3 Control 5 - All FANS ON 6 - All FANS OFF FAN 0 ON/OFF ON ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 21 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 9 - Pump Control Select Pump Control from the Configuration Menu to display the following. Press selection on or off. or to toggle the Pump ON/OFF ON ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 10 - Bypass Lock On Control Select Bypass Lock On Control from the Diagnostics Menu to display the following. Use this menu to enable or disable the Bypass Lock. Bypass Lock: OFF Press selection on or off. or to toggle the ENT to display the Confir-

Press mation screen. From the Confirmation screen, or press to toggle the selection Yes or No, and return to the previous screen. Confirm Update? YES NO YES 22 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Installation and Setup Safety Lethal AC and RF voltages are present within the cabinets of the Bar-

rett 4075 solid-state Linear Amplifiers and the Barrett 4075 Power Supply Unit. The proper, safe installation of the Barrett 4075 solid-state Linear Amplifier is not difficult to accomplish if the following guidelines are followed:

All electrical work should be undertaken by a suitably qualified person and in accordance with local bylaws. Use extreme caution when opening the cabinet(s) to perform any alignment or adjustment steps, and take particular care to inspect interconnection cables frequently to ensure that they are in good condition. The Linear Amplifier units are heavy! Proper lifting techniques are recom-

mended when installing the Power Amplifier and Power Supply units. A suitable minimum 3 kVA rated Line Conditioner unit is required to ensure protection for the Power Supply unit against unstable mains supply. Failure due to mains power fluctuation and no Mains Line Conditioning unit employed will not be considered as a warranty repair. Suitable Lightning Protection and Earth connection is essential to minimize or prevent lightning induced damage of the Linear Amplifier. Barrett Communi-

cations Earthing Kit (P/N BCA207503) is suitable for this purpose. Lightning induced damage is not considered a warranty repair. Getting Started The new 4075 system is shipped with the Linear Amplifier removed from the rack. All other units are fitted and factory adjusted for optimum operation. All vacant slots are covered. Mains Connection Once the rack is located in its final position and secured to the floor, unwrap the internally fitted orange mains cable and feed it out of the cabinet either at the bottom or through the top cable access point and connect to a suitable mains source. 23 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL The 4075 high power transmitter systems are usually built into either the 20RU or 39RU racks. Each system includes an AC power distribution box BCA407520. Connection of mains power into this box is via a six metre long mains cable which is directly terminated into the AC power distribution box. The other end of this cable is left unterminated for hard wire connection to a customers mains supply through a suitable high current termination. This termination should be performed by a suitably qualified electrician. Barrett Communica-

tions recommend that a dedicated RCD is used in this circuit. Please note that the peak current drawn by the 4075 system exceeds normal wall socket ratings and so connection through a wall socket is not safe and should be avoided. According to Australian / New Zealand Standards, the mains cable conductor colour code is as follows:

Conductor colour Brown Blue Green/Yellow Designation Active Neutral Earth All Barrett equipment is automatically able to operate with mains input voltage range of 100 to 250 V AC. However, the system mains supply cable for mains voltages below 200 V AC needs to be adjusted for the heavier current with the following typical specifications:

Voltage 240 V AC 240 V AC 110 V AC 110 V AC Power 1000 W 500 W 1000 W 500 W Current Draw 20 A peak 16 A peak 40 A peak 25 A peak For mains voltages 250 200 V AC, the mains supply cable has conductors of 2.5 mm2 For mains voltages 200 100 V AC, the mains supply cable has conductors of 4 mm2 By default, the cable type supplied with 4075 systems is for the higher mains voltage range. A special requirement needs to be ordered for low mains volt-

age systems. 24 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Ground (Earth) System The ground (earth) system is a key part of the overall system and consequently of the system performance. An inadequate ground system is the primary cause of poor system performance, noise and lightning damage. When an ATU is fitted, the system ground will include a ground counterpoise which is essential for ATU tuning performance. Land System Grounding The following major aspects should be considered when installing a land based station grounding system:

Rack and equipment ground with respect to the mains supply and personal safety is paramount. The installation of all electrical equipment should be in accordance to local bylaws, and grounding is a requirement for effective earth leakage protection. Grounding with respect to EMI (Electro Magnetic Interference): Due to the high RF fields in the proximity of the transmitter rack, shielding of all equipment and cables is important. Each Rack Mounted main item is connected to the rack vertical ground strip via flexible straps. The sup-

plied system rack and cables have been adequately shielded. The ground point for external connection can be found at the rear bottom of the rack. The rack earth connection should be extended, as directly as possible, to a suitable ground, outside of the building, using preferably, a 50 mm copper earth strap. All signal cables should be shielded and grounded at each end. Lightning protection also requires a good ground connection and should be similarly connected to the building ground. The lightning protection should ideally be located where the coaxial cables enter the building, and coupled to ground as directly as possible. When an unbalanced antenna or an ATU is used, the antenna ground, or counterpoise is vitally important. Providing an adequate counterpoise at ground level is difficult, but it is far more difficult when the ATU is placed on a roof top. At ground level, the use of 8 to 12 radial wires of 16 gauge or larger, each of about 1/3 longer than the length of the antenna, buried to about 150 mm below the surface should be adequate. (Radial earth mat / ground plane: Barrett P/N BCA20026) Connection to metal water pipes can also improve the ground. On a roof top, there is usually not enough space for an adequate counterpoise. An effective counterpoise may be achieved by covering the entire roof surface below the antenna with wire mesh which is then connected to the ground as directly as 25 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL possible. It must be noted however, that the successful tuning of the ATU and the resulting VSWR performance of the antenna, will greatly depend on the effectiveness of the counterpoise provided. Marine System Grounding Metal hulled vessels provide an almost perfect ground. The tuner ground terminal should be connected directly to the hull using the shortest possible ground strap. The point of connection to the hull should be prepared so that it is free of paint and rust to ensure a good contact area with minimum electrical resistance. Wooden or fibreglass vessels present more of a problem to ground. Ideally the vessel should be fitted with an external copper ground sheet, connected to the interior of the vessel by suitable stud or an earth plate (E plate Barrett P/N BCA91700). If the vessel is yet to be constructed, then in the case of fibreglass vessels a thin copper sheet with an area of not less than 4 square metres should be moulded into the hull during lamination. A suitable heavy strap should be connected to the sheet and left free for earth connection. Should neither of these methods be available, it will be necessary to bond as many large metallic objects, such as the engine and propeller shaft, together to form a ground. Whichever method is used, the ground run from the ground system to the antenna tuner should be as short as possible and copper strap at least 50 mm wide (wider if available) should be used. Corrosion All connections in marine situations are subject to corrosion and oxidation. To minimise this, all joints should be cleaned and have silicon grease applied before assembly. Under severe conditions, joints should be protected with self vulcanising rubber tape. Consideration must always be given to the problem of electrolysis. Severe structural damage may occur if electrolysis is present. 26 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Antenna Connection The 4075 system can only perform well when a suitable antenna, in good condition, is installed. There are many antenna types available on the market, and so no specific antenna detail is provided in this manual. Please refer to the instruction brochures for the antenna type selected. Please note that a VSWR of

< 2:1 is desirable for optimum performance of the Linear Amplifier. We suggest that for high power transmitters, a type RG-213 or better cable is used for all coaxial feeds beyond the Linear Amplifier. For improved coaxial feeder performance over long runs, we suggest the use of a low-loss coax-

ial cable. Our Technical Services department can assist with cable selection if required. The use of a lightning protection module is recommended. Fitting the Linear Amplifier Unpack the Linear Amplifier and refer to the connection diagrams shown below. Unless otherwise specified for special project requirements, all cabling with the exception of the coaxial RF output cable, are installed in the rack and so identification and connection is straightforward. Both the 4075 Linear Amplifier and the 4075 Power Supply units have been factory adjusted for optimum performance. 4050 Transceiver Setup Important: The 4050 Transceiver must be specifically set for use with a Linear Amplifier. It is important that the Antenna Type selected within the I/O Set-

tings menu of the Transceiver, is set to 4075 Linear Amplifier. In this mode, the output power of the Transceiver is limited to between 30 W and 80 W, and the Automatic Level Control (ALC) voltage is sourced from the Linear Amplifier. Please refer to the 4050 HF SDR Operating and Installation Manual (P/N BCM40500) for comprehensive details on operating the Transceiver. 27 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 System Connections The BC407500 - 1000 W Transmitter may be located in an 18RU desk mounted rack cabinet or 39RU floor mounted rack cabinet. 1 3 2 4 3 5 4 6 5 7 6 8 7 9 8 10 1 Power Distribution Unit 0 Speaker / Mic insert and 4050 Control Head Breakout Box (Rear) 4050 Exciter and 4022 Power Supply Linear Amplifier Power Supply Power Distribution Unit Speaker / Mic insert and 4050 Control Head Breakout Box (Rear) 4050 Exciter and 4022 Power Supply Linear Amplifier Power Supply 4075 Linear Amplifier 4075 Linear Amplifier Coax Switch Coax Switch 16 A M P 16 A M P 16 A M P 7 A M P 0 16 A M P 16 A M P 16 A M P 7 A M P 1 LTR QTY HOLE SCHEDULE ECN DATE DESCRIPTION 16/06/17 No A0 REVISIONS ISSUED QTY DRAWN LI LI REMARKS ECN No Inital release A0 DATE 16/06/17 REVISIONS DRAWN ISSUED REMARKS LI LI Inital release DIMENSIONS IN mm MATERIAL:

FINISH:

28 1 3 2 4 3 5 4 6 5 7 6 8 GENERAL TOLERANCES:

WHOLE DIMS: +/-0.25mm 1 DEC PLACE: +/- 0.2mm ANG: +/-1 deg UNLESS OTHERWISE STATED DESIGNED LI DRAWN LI DATE GENERAL TOLERANCES:

WHOLE DIMS: +/-0.25mm 1 DEC PLACE: +/- 0.2mm ANG: +/-1 deg UNLESS OTHERWISE TITLE STATED BC407513 20RU, 500W, 4075 Rack + Coax Switch Front View DRAWING No. SPA140 8 10 DIMENSIONS IN mm 16 Jun 17 MATERIAL:

SCALE NTS ISSUED FINISH:

LI ISSUED DATE 16 Jun 17 9 7 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 Connections - Rear View Internal rack cable connections are indicated in the following drawing:

1 4 6 Linear Amplifier Power Supply

(48 V) 11 9 12 5 10 2 10 9 5 7 8 9 2 5 3 29 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL IEC power cable C14 to C13 1m DE15F to DE15M cable 1.2m 4075 DC power cable Coax lead PL-259M to PL-259M DC power cable Accessories DC power cable 4075 Linear to PSU control cable Coax lead N-type M to PL-259M Earth strap Earth strap DB9M to DB9F cable 2.5ft Mains connection 30 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL System Description The 4050 Transceiver sends the transmission frequency to the Linear Amplifier which sets the appropriate low pass filter. In Standby (Receive) Mode (No PTT) In standby mode, the RF signal at the antenna bypasses the Linear Amplifier and goes straight to the Transceiver. The Transceivers demodulated audio is available from the external speaker fitted to the rack. In Transmit Mode (PTT Active) The PTT signal from the Transceiver is passed via the Breakout Box to the Linear Amplifier where it is used to set the Linear Amplifier to Transmit. The Linear Amplifier then routes the RF signal through the power amplifier stages, the Low Pass Filters (LPF) and ALC detection circuit, to the antenna connection. The ALC voltage produced in the Linear Amplifier is passed back to the Transceiver via the Breakout Box. The ALC voltage is used to monitor the VSWR condition of the load and consequently reduces the output power of the Transceiver, in the event of a fault condition. 31 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Operation Settings Factory Settings All unit settings have been factory preset for optimum performance. No inter-

nal adjustments are required. System Settings As with any system, user specific settings are required. Most user settings are made through the front panel of the 4050 Transceiver. Please refer to the 4050 HF SDR Operating and Installation Manual (P/N BCM40500) for comprehensive details of functions available. Please note that there are some important settings which should be checked prior to keying the system for the first time:

The 4050 Transceivers Antenna Type must be selected within the I/O Settings menu to 4075 Linear Amplifier. The 4050 Exciter Transceiver must be programmed with appropriate frequencies and operating parameters including the power setting. Please note that the RF transmit power level should be set to 125 W, if the out-

put power of the Linear Amplifier is 1000 W. Receiver checks can now be performed. The receiver is identical in operation and function to a stand alone 4050 Base Station Transceiver. The 4075 Lin-

ear Amplifier, in bypass or fail state, will pass the received RF signal directly through to the 4050 Transceiver. Only after the above has been checked, can you proceed to perform Transmit-

ter checks. In SSB mode, the transmitter will only produce power when modulation is pres-

ent. The front panel of the 4075 Linear Amplifier can display both the forward power and VSWR via display menus (see page 8). The Linear Amplifier will not tolerate poor antenna matching when the VSWR is greater that 3:1. If this occurs, the Linear Amplifier will fold back the power so less power is transmitted. This will continue to fold back as VSWR increases. At >5:1 the power will be half. As the VSWR approaches 6:1, the Linear Amplifier will trip out with a VSWR error and enter bypass mode 32 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL The antenna and feeders need to be in good condition, and where an ATU is fitted, the antenna and counterpoise must be adequate. The performance of the system relies entirely on the condition of the antenna. A simple test to prove transmitter performance is to use the Tune function of the Transceiver:

Tap and hold Tune on the front panel of the 4050 Transceiver and note the readings of the forward power and VSWR displayed on the 4075 Lin-

ear Amplifier (see page 8). This should be performed for each of the programmed frequencies. If an ATU is fitted and Tune is tapped, the system will invoke a tune cycle. Once the ATU has attained a tune pass, additional Tune tapping will produce the same results as above. If Selcall is enabled, send a Selcall to ensure the correct modulation to achieve full output power indication. Note: As the Transceivers antenna type has been set to 4075 Linear Amplifier, if an external through-line power meter is used to measure the RF power out of the 4050 Transceiver, the Transceiver will NOT produce 125 W output power. A meas-

ured reading between 50 W and 80 W is likely to be present at the antenna output of the Transceiver, when Tune is invoked. Maintenance This unit requires low maintenance. Regular attention to the condition of all eternal cables and connections is recommended, especially where the cables are exposed to unfavourable weather conditions. 33 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL 4075 - Specifications Please note these details are subject to change. General Description 1 kW 1.5 dB 1.6 ~ 30 MHz Specification Power Output CW Frequency Range Input Power for Rated Output 10 W Power input Power Gain Gain Flatness Duty Cycle Input Return Loss (S11) Third Order Intercept (IP3) Harmonics Non harmonic products Intermodulation Distortion ALC Voltage (output) T/R Switch Isolation T/R Switch Time Filter switching time Filter Type LPF band cutoff frequencies Power Requirements BITE MTBF MTTR 10 W min ~ 100 W max, step attenuated

+25 dB 1.5 dB 100%, Continuous PEP, CW

-15 dB Max

+75 dBm

> -55 dBc (2 to 30 MHz)

> -70 dBc (2 to 30 MHz)

> -30 dBc 0 ~ 10 V

-30 dB 15 ms Max 15 ms Max LPF 2.48, 3.84, 6, 9.3, 14.5, 20, 30 MHz 48 V DC @ 60 A, 12 V 24 V DC @ 2.5 A max Microprocessor controlled 11.01 k Hours 0.5 Hour (Level 2 maintenance, intermediate

- faulty board identification and replacement) 34 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Mechanical Specification Dimensions excluding handles and I/O con-

nectors Rack Height Weight Cooling Colour Environmental Description 178 x 482 x 480 mm (7 x 19 x 19 ) H x W x D 4U, 19 Rack mount 30 kg (66 lbs) Liquid cooled, Water Propylene Glycol mixture Black Specification Temperature Humidity Altitude Vibration Shock EMI/EMC FCC Description 10C to +50C operational, -40C to +85C storage 95% relative, non-condensing 3000 m above sea level (not airborne), 9000 m transportation Designed to meet MIL-STD-810G Method 514.5 Designed to meet MIL-STD-810G Method 516.6 Designed to meet MIL-STD-461F Pending approval Controls and Indicators Specification Switches and controls Graphic display Metering Indicators (LEDs) Description 7 Key keypad ON/OFF, and menu navigation Dot matrix OLED display Output VSWR, Supply Voltage and Supply Current Power, Tx, Alarm, Log 35 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Connectors (Front) Specification Micro USB A/B Connectors (Rear) Description System Interface Status, BITE, Settings, Firmware upload Description RF Input RF Output 2050 Legacy interface PSU Control 4050 SDR Interface ATU Control Auxiliary Control 4022 PSU Programming interface Specification UHF SO-239 (MIL-C-4914) Type N or 7/16 (option) D-Sub 15 D-Sub 15 D-Sub 9 D-Sub 9 D-Sub 9 D-Sub 3W3 Micro USB Type A/B Optical Multi-mode Fibre SFP ATU Control RJ45 Anderson SBS75X Ethernet DC Power input Protection Specification Description Linear amplifier bypass on overload Input Overdrive Output VSWR Thermal Overload Fault Log

>10 W (at 0 dB input attenuation)

>3:1 Power Fold Back; >6:1 Bypass

>135C Pallet System events and error reporting 36 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Limited 3 Year Warranty Statement Barrett Communications Pty Ltd provides a maximum three year warranty on all equipment it manufactures which is to be used expressly for high frequency, single sideband radio communications. This warranty covers faults arising from defects in design, workmanship or materials. Please note that this warranty does not cover batteries. Should any fault due to bad design, workmanship or materials be proven at any time within the warranty period, the company will rectify such fault free of charge providing the equipment is returned freight paid to Barrett Communications Pty Ltd head office or to an authorised service centre. The warranty period for all products is thirty six (36) months after date of shipment from the factory. In the event that Barrett Communications repairs or replaces a defective product part under warranty, the repaired or replaced product will remain covered under and throughout the term of the original warranty period up to its expiration. No repair or replacement will extend the warranty term past the original thirty six (36) month anniversary of the original shipment delivery date of the Barrett Product. This warranty shall not cover any abuse, accident, improper installation, connection, adjustment or use other than in accordance with the instructions issued by the company. In addition, this warranty shall not cover the distance which transceiver products will operate over or quality of transmission or reception as a result of unfavourable environmental conditions. Nor shall this warranty cover the quality of transmission and reception of transceivers mounted in vehicles or vessels that have not been sufficiently electrically suppressed. Subject to the matters set out in this warranty, no liability, expressed or implied is accepted for any consequential loss, damage or injury arising as a result of a fault in the equipment and, all expressed or implied warranties as to quality or fitness for any purpose are hereby excluded. This warranty does not extend to products supplied by the company which are not designed or manufactured by it. Barrett Communications Pty Ltd will however make every endeavour to ensure that the purchaser receives full benefit on any warranty given by the original equipment manufacturer. This warranty is restricted to the original purchaser. Where the original purchaser is a reseller who has purchased for the purpose of resale, warranty shall be extended to the resellers customer. 37 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Warranty Registration and Technical Support Thank you for purchasing Barrett HF communications products. Please complete the warranty registration form on the next page and send it to us by mail, fax or email. Please see contact details below. Once received your contact details will be registered against the serial numbers of your equipment and Barrett Communications will then be able to contact you if needed to keep you informed of any developments relating to your equipment. If you have access to the Internet you can use the warranty registration page in the tech support section of our website to register your warranty form. Please go to www.barrettcommunications.com.au/Support.html Barrett Communications is proud of its reputation for support of its customers. This registration process has been introduced so that we may continue to improve our level of support to you. 38 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Warranty Registration Contact Details By Mail The registration forms can be returned by mail, (no postage stamp required in Australia) Facsimile 08 9418 6757 (International +618 9418 6757) Email support@barrettcommunications.com.au Our customer / dealer technical support department can be contacted via land mail, email, telephone or with the support department contact form on the tech support web page. Barrett Communications Pty Ltd Head Office:

PO Box 1214, Bibra Lake WA 6965 AUSTRALIA Toll Free Tel: 1800 999 580 (Within Australia) Tel: +618 9434 1700 Fax: +618 9418 6757 email: support@barrettcommunications.com.au Telephone support from the Australian support office is available from 7:30 am to 4:30 pm local time Monday to Friday. Barrett Communications Europe:

Unit 9, Fulcrum 2 Victory Park, Solent Way, Whiteley Hampshire PO15 7FN United Kingdom Tel: +44 (0) 1489 880 332 Fax: +44 (0) 1489 565 422 email: support@barrettcommunications.co.uk Telephone support from the UK support office is available from 8:30 am to 5:00 pm local time Monday to Friday. 39 BARRETT 4075 LINEAR AMPLIFIER - OPERATING & INSTALLATION MANUAL Barrett Communications Pty Ltd 47 Discovery Drive, Bibra Lake, WA 6163 Australia Tel: +61 8 9434 1700 Fax: +61 8 9418 6757 Email: information@barrettcommunications.com.au www.barrettcommunications.com.au