FCC ID: E86RPE673 Multitone RPE673 Radio Paging Transcoder

Federal Communications Commission (FCC) and Industry Canada (IC) Product Information This product has been tested and certified for use in both the US and Canada.

(The term IC: before the certification/registration number, only signifies that the Industry Canada technical specifications were met.) Any modifications to this equipment not expressly authorised by Multitone, could void the users authority to operate the equipment. Installation:-

Important Safety Information In order to comply with the FCC 47CFR and Canadian Safety Code 6 regulations for the Maximum Permitted Exposure (MPE) to Radio Frequency Fields, it has been determined that this equipment and its associated antenna, should not be installed within 1 metre distance

(inclusive of safety margin) of where people may be located, or can approach, for periods in excess of 5 mins. in any 1 hour. The equipment should be positioned, so that there is no interference to the flow of air through ventilation openings and away from any sources of heat. Do not install near sources of water, moisture, or in areas where hazardous gases or vapours may be present. The equipment should only be mounted to a wall, as recommended in the installation instructions. All installation wiring should be carried out in accordance with recognised Codes of Wiring Practice, applicable to the equipment and circuits involved, eg. mains power, telephone and/or radio. Power supply cords and other leads, should be routed so that they are not likely to be walked on, or pinched, by items placed upon or against them. Particular attention should be paid to cord entrance and exit points. Where installation involves an external radio aerial/antenna, the antenna should be located away from power lines. Ensure that where applicable the antenna system is grounded, to provide some protection against voltage surges and build-up of static charges. Power connection:-

The equipment should only be connected to a power supply as described in the operating instructions, or as marked on the equipment. Do not overload outlets and extension cords, as this can result in fire, or electrical shock. Where equipment has been provided with a three-wire grounding type plug, this plug will only fit a grounding type power outlet. This is a safety feature and should not be defeated. If you are unable to use a grounding outlet, contact your electrician. Where equipment has been provided with a polarized line plug (one blade wider than the other -

US/Canada), this plug will only fit a power outlet one way. This is a safety feature and should not be defeated. If you are unable to insert the plug fully, try reversing the plug. If the plug should still not fit, contact your electrician to replace the obsolete outlet. Servicing: -

This equipment contains non user-serviceable parts. All repairs to be undertaken by qualified service personnel. In the case of a problem, please contact your service representative/agent. No attempt should be made to remove any designated safety covers, as these areas contain voltages of a sufficient magnitude to constitute a risk of electric shock to personnel. All the safety and operating instructions should be read before the equipment is connected and operated and retained for future reference. All warnings marked on the equipment should be strictly adhered to. 9261-7225 Iss. 1 US & Canadian Agents:-

U.S. Turn-key Technology Inc. (T.T.I.) 10 Parsonage Road, Edison, New Jersey 08837 USA Tel: 1-732-906-0600 Fax: 1-732-906-0626 www.turn-keytechnologies.com Canada Multitone Wireless (Canada) 241 Edgeley BL. Unit 13 Concord, Ontario L4K 3Y6 Canada Tel: 1-905-760-9696 Fax: 1-905-760-9445 9261-7225 Iss. 1

RPT 633 TECHNICAL MANUAL for UHF TRANSMITTER MODEL RPT 633 and UHF SERIAL ENCODER MODEL RPE 673 Printed and published in England TM1184 Issue 1 AL1 (May 1997) Page (i) RPT 633 COMPANY LIABILITY The information in this manual has been carefully compiled and checked for technical accuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line with the company policy of technical advancement, the information within this document may be changed. The user should ensure that the correct issue of the document is used. Comments or correspondence regarding this manual should be addressed to:

Multitone Electronics plc Technical Publications Multitone House Beggarwood Lane Kempshott Hill Basingstoke Hampshire RG23 7LL England ISSUE 1 DATE April 1994 Multitone Electronics plc 1997 Page (ii) TM1184 Issue 1 AL1 (May 1997) RPT 633 CONTENTS Page (i) Page (ii) Page (iii) Page (iv) Page (v) Title Page Company Liability Contents Effective Page List Safety Summary Warning Page (vi) Cautions Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Introduction and Specification Operating Instructions Technical Description Installation and Commissioning Servicing Spare Parts List Diagrams Appendix 1 UHF Serial Encoder Model RPE 673 TM1184 Issue 1 AL1 (May 1997) Page (iii) RPT 633 EFFECTIVE PAGE LIST Page No. Issue Page No. Issue Page No. Issue

(i)

(ii)

(iii)

(iv)

(v)

(vi) 1-1 1-2 1-3 1-4 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 4-1 4-2 4-3 4-4 1 AL1 1 AL1 1 AL1 1 AL1 1 1 1 AL1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4-5 4-6 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 5-10 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 7-1 7-2 7-3/4 7-5/6 7-7/8 7-9/10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 7-11 A1-1 A1-2 A1-3 A1-4 A1-5 A1-6 A1-7 A1-8 A1-9 A1-10 A1-11 A1-12 A1-13 A1-14 A1-15 A1-16 A1-17 A1-18 A1-19 A1-20 A1-21 A1-22 A1-23 A1-24 1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 1 AL1 Page (iv) TM1184 Issue 1 AL1 (May 1997) RPT 633 SAFETY SUMMARY The following information applies to both operating and servicing personnel. General Warnings and Cautions will be found throughout the manual where they apply. WARNING statements identify conditions or practices that could result in personal injury or loss of life. CAUTION statements identify conditions or practices that could result in equipment damage. WARNING GREAT CARE MUST BE TAKEN TO AVOID BREAKING OPEN THE ENCAPSULATION OF TR10 ON THE TRANSMITTER BOARD WHEN REPAIR OR COMPONENT REPLACEMENT IS BEING CARRIED OUT, AS THIS COMPONENT CONTAINS TOXIC BERYLLIUM OXIDE. TM 1184 Issue 1

(v) RPT 633 CAUTIONS DO NOT MOUNT OVER A HEATER OR RADIATOR, OR IN DIRECT SUNLIGHT AND ENSURE A DRY ENVIRONMENT. STATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. CARE MUST BE TAKEN TO ENSURE DAMAGE TO THESE DEVICES IS NOT CAUSED BY HIGH LEVELS OF STATIC ELECTRICITY. SPARE BOARDS OR COMPONENTS SHOULD BE STORED IN ANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT.

(vi) TM 1184 Issue 1 RPT 633 SECTION 1 INTRODUCTION AND SPECIFICATION CONTENTS:

1. 2. 4. INTRODUCTION ROLE OF THE TRANSMITTER PHYSICAL CONSTRUCTION SPECIFICATIONS Transmitter 5. Connectors 6. 7. Physical Characteristics 8. Operational Enviroment 9. Power Supply 10. CRYSTAL FREQUENCY CALCULATION _______________________ INTRODUCTION 1. 2. 3. Sections 1 to 7 of this manual outline the installation and operation of the Radio Paging Transmitter model RPT 633. Appendix 1 details the Serial Encoder model RPE 673 and provides appropriate cross references to the main part of this manual

(Sections 1 to 7) where functionality is common. ROLE OF THE TRANSMITTER The transmitter is designed for operation with the RPE 340-series of telephone coupled encoders, or from the encoder output of the Access 3000, which together provide radio coverage with speech for smaller sites. The RPT 633 operates in the UHF band

(420MHz to 470MHz), divided into three sub-bands, and has an output of 2.5 Watts. Digital control reduces the wiring between the encoder and transmitter to a single pair for tone and display systems. A four wire connection is required for speech systems. TM1184 Issue 1 AL1 (May 1997) Page 1 - 1 RPT 633 PHYSICAL CONSTRUCTION 4. The transmitter consists of two boards, a transmitter board mounted in the base assembly and a VOX keying module mounted in the cover assembly. SPECIFICATIONS Transmitter 5. The following describes the performance and physical characteristics of the RPT 633 UHF transmitter:

a) b) Frequency Range:

Frequency Bands:

c) Channel Spacing:

420MHz to 470MHz Band 1 Band 2 Band 3 420MHz to 424.99MHz 425MHz to 446.99MHz 447MHz to 470MHz Factory set to 10kHz, 12.5kHz, 20kHz or 25kHz d) Frequency Stability

(normal):

5ppm from -10EC to +55EC

(high stability):

1.5ppm from -10EC to +55EC 2ppm from -25EC to +55EC 2.5ppm from -30EC to +60EC e) Output Power:

2.5W 1dB f) g) h) Duty Cycle:

50% (Max transmit time 2.5 minutes) Nominal Load Impedance:

50 Ohms VSWR Protection:

Protection against short term removal of antenna (maximum of five calls with antenna disconnected). Connectors 6. The following connectors are mounted on the transmitter board:

a) b) c) d) PSU

- SK3:

Digital

- SK2:

Analogue

- SK1:

RF

- SK4:

2.1mm jack socket 2-way modular keyed connector 2-way modular keyed connector TNC socket Page 1 - 2 TM 1184 Issue 1 RPT 633 Physical Characteristics 7. The dimensions and weight of the transmitter are as follows:

a) Overall Dimensions:

Width Depth Height 235mm (9.5in.) 210mm (8.3in.) 90mm (3.6in.) b) Weight (Excluding PSU):

1.2kg (2.65lbs.) Operational Environment 8. The environmental characteristics of the transmitter are as follows:

a) b) c) Temperature Range:

Operational -10EC to +50EC Humidity:

Altitude:

0-90% RH (non-condensing) Up to 2000 metres Power Supply 9. 17V 0.8A DC Nominal supplies from Multitone Power Supplies:

0301-0605 240V (UK) 0301-0606 220V (EURO) 0301-0607 110V (US) CRYSTAL FREQUENCY CALCULATION 10. To calculate the carrier crystal frequency the following formula should be used:

Crystal Frequency = Operating Frequency A Where A = 56 for Band 3 or A = 48 for Bands 1 and 2 TM 1184 Issue 1 Page 1 - 3 RPT 633 INTENTIONALLY BLANK Page 1 - 4 TM 1184 Issue 1 RPT 633 SECTION 2 OPERATING INSTRUCTIONS The transmitter is fully automatic in use and operation is limited to switching on the mains supply. TM1184 Issue 1 Page 2 - 1 RPT 633 INTENTIONALLY BLANK Page 2 - 2 TM1184 Issue 1 RPT 633 SECTION 3 TECHNICAL DESCRIPTION CONTENTS:

1. INTRODUCTION TRANSMITTER Power Supplies 2. 3. Mode Select Circuit 5. 6. 7. 8. 9. 10. 11. 13. 14. 15. 16. Output Amplifier Audio Input Data Input Crystal Oscillator High Stability Version Voltage Controlled Oscillator (VCO) Phase Locked Loop (PLL) Transmitter Keying Frequency Multiplier Band Pass Filter Driver Stages VOX KEYING MODULE 17. General 18. 19. 20. Analogue Path Data Mode Decoding OPERATION 21. General 22. 23. 24. 29. Power Up Data Path Switching to Speech Switching from Speech to Data TABLES 1. VOX Keying and Mode Signals Page 3-7 TM1184 Issue 1 Page 3 - 1 RPT 633 CONTENTS: (Continued) FIGURES Speech Call Block Diagram 1. 2. Module Interconnection Diagram 3. 4. Open Channel Speech Switching Into Speech 5. 6. Switching From Speech Page 3-2 3-6 3-8 3-8 3-9 3-10 _______________________ INTRODUCTION 1. The RPT 633 Transmitter accepts analogue or digital information which is modulated onto an UHF signal. The transmitter output frequency is produced by doubling the frequency of a voltage controlled oscillator (VCO). The VCO is locked to a reference crystal oscillator which is frequency modulated by either the Data or Audio input signals. A basic block diagram is shown at Figure 1. ANALOGUE INPUT SPEECH CIRCUIT DIGITAL INPUT VOX KEYING MODULE MODE DATA Tx KEY DATA CIRCUIT PLL CIRCUIT RF CIRCUIT Figure 1: Block Diagram PSG/10280-1 TRANSMITTER Power Supplies 2. A nominal 17V DC power supply is fed into the board at SK3 where it is filtered by L14, L15, L16, C67 and C68. Fixed voltage regulators IC3 and IC4 provide 12V for the transmitter circuit and output transistor respectively, while regulator IC5 produces 5V for the transmitter and VOX Keying module. Integrated circuit IC2 produces 8.2V for the VCO and buffer amplifiers and IC11 acts as a voltage converter to produce -11V from a 12V input. Page 3 - 2 TM1184 Issue 1 RPT 633 Mode Select Circuit 3. With the mode input at 5V the Speech mode is selected. The output of IC6d is low, inhibiting the passage of Data by shorting the data path to 0V via D11 and enabling the passage of Audio by forward biasing D9. Variable resistor RV3 together with R102, R103, R108 and R116 hold the output of IC12d at approximately 0V, which in turn sets the voltage on varactor diode D8 to give the nominal carrier frequency of the transmitter. 4. With the mode input at 0V the Data mode is selected and the output of IC6d goes high, inhibiting the audio path by reverse biasing D9 and allowing data to pass from IC6b to IC6a. 5. 6. Audio Input The audio input is amplified and pre-emphasised by IC13b before passing through the audio gate D9 to the limiting amplifier IC13a, the output of which is limited to approximately 10V peak to peak. After limiting, the maximum speech deviation is set by RV4. The signal is then passed to TR12, IC10b and associated components, which form a modified 0.4dB four section Chebyshev Filter, which has a cut off frequency of 2.6kHz and a modified frequency response to give an approximate 2dB lift at 2.55kHz. This compensates for the fall off in deviation caused by the characteristics of the phase locked loop. Filtered audio passes through summing amplifier IC10a and unity gain buffer IC10d to modulating varactor diode D8. Summing amplifier IC10a also superimposes the audio signal onto the DC voltage produced by IC12b. Data Input Input data may be selected to either pass through IC6c, which inverts it, or bypass IC6c depending on the setting of data polarity selector link LK3. The data passes through IC6b and IC6a, the output of which switches between being high impedance or low impedance to 0V. The frequency of the crystal oscillator does not vary linearly with the voltage on D8 so the values of resistors R102, R103, R108, R116 and RV5 have been chosen to give a voltage swing, at the output of IC12d, of approximately +3V to -4.8V as the voltage on the input of IC6b switches between 0V and 5V. The data signal then passes through IC12a, IC12b and associated components, which form a fourth order Bessel filter, which give the data edges a controlled risetime of 250s. After filtering, the signal passes through IC10a and IC10d to varactor diode D8, RV2 being used to set the data deviation level. The whole of this modulation path is DC coupled so that a constant logic level on the input produces a constant deviation of the output frequency. TM1184 Issue 1 Page 3 - 3 RPT 633 Crystal Oscillator 7. The reference oscillator TR11 is of the crystal controlled Colpitts type, operating on the fundamental frequency of the crystal which is 1/48th of the output frequency for Bands 1 and 2 and 1/56th of the output frequency for Band 3. The oscillator frequency is trimmed by VC5. Varactor Diode D8 provides the modulation, The capacitance of the diode, and therefore the oscillator frequency varies with the voltage across the diode. The output of the oscillator is buffered by IC8b. High Stability Version 8. On the high stability version a temperature controlled crystal oven OV1 is fitted which covers the special high temperature crystal. Voltage Controlled Oscillator (VCO) 9. Transistor TR2 is a Colpitts oscillator running at half the carrier frequency, the frequency being determined by L1, C4, C5, C6 and the capacitance of the dual varactor diode D1. The output of the oscillator is buffered by IC1 and TR4. Phase Locked Loop (PLL) 10. The VCO output frequency from TR4 is divided by 256 in IC9 and then buffered by linear amplifiers IC8c and IC8d before being fed to IC7. Within IC7 the signal is further divided by either 6 (for output frequencies less than 447Mhz) or by 7 by a programmable divider, the division ratio being set by shorting link LK2, 1-2 equals divide-by-6 and 2-3 equals divide-by-7. Also, within IC7, the crystal oscillator frequency is divided by 64 before being fed, together with the VCO signal, to a phase/ frequency comparator. E.g. for a carrier frequency of 448MHz the crystal oscillator frequency is 8MHz which gives an input to the comparator of 125kHz. The VCO is running at 224MHz which is divided by IC9 to give 875kHz and then by IC7

(LK2 2-3) to give 125kHz. The PLL control output is fed out of IC7 at pin 13 and via loop filter R47, R48, C69, and C70 to the VCO. The filter controls the dynamic behaviour of the loop, the modulation frequency response and the level of the PLL reference frequency sidebands. When the PLL has achieved lock it sends a high in-lock signal from IC7 pin 12, via delay circuit R49, R50, C71 and D5, the buffers IC8a and IC8f, to forward bias TR5 and TR8. D5 allows C71 to discharge quickly when the lock fail condition occurs and to charge slowly when the in-lock condition is restored. Page 3 - 4 TM1184 Issue 1 RPT 633 Transmitter Keying 11. 12. 13. Normal transmitter keying is achieved by fitting a shorting link across LK1 pins 2-3. In the quiescent state the Tx Key line is at 5V, the output of IC6f is at 0V and the bias voltages of TR5 and TR8 are shorted to 0V. When the VOX keying module sets the Tx Key command to logic low the output of IC6f goes high impedance. Forward bias is applied to TR5 and TR8 providing the PLL is in lock. Provision has been made for an alternative method of keying the transmitter which keys the VCO off when the transmitter is not in use, thus removing any carrier components in the standby mode. This is achieved by fitting LK1 pins 1-2. A 0V signal on the Tx Key line then turns on TR3, via inverter IC6f, which in turn turns on TR1 and supplies 8.2V to the VCO transistor TR2. Frequency Multiplier Transformer T1, enabled by the in-lock signal turning on TR5, provides a balanced feed to the multiplier diodes D3 and D4 which pass the desired transmit output frequency and reject the fundamental frequency and odd harmonics of it. The desired frequency is passed to TR6 for amplification Band Pass Filter 14. This is made up of two cascaded two-section helical filters FL1 and FL2. The filters reject any VCO leakage and any unwanted frequencies generated by the multiplication process. Driver Stages 15. Transistors TR7, TR8, TR9 amplify the filtered signal up to a level of approximately 250mW, inter stage matching being optimised by VC1 and VC2. The output power from TR9 and ultimately the output power of the transmitter, is controlled by RV1, while the bias for TR8 is controlled by the keying line ensuring a high attenuation of the output signal when the transmitter is keyed off. Output Amplifier 16. Matching between TR9 and TR10, operating as a class C amplifier, is optimised by VC3. The output of TR10 is matched to the output filter by C50, C51 and a length of micro-strip line, the filter being formed by C53 to C60 and the micro-strip lines. Any harmonics of the output frequency are attenuated by the filter and any residual VCO signal is attenuated by VC4 and L13. The output power at SK4 is 2.5W. TM1184 Issue 1 Page 3 - 5 RPT 633 VOX KEYING MODULE General 17. The VOX keying module decodes encoder presented serial data and controls the transmitter. Interconnection between the Transmitter PCB and VOX Keying PCB is as shown in Figure 2. Figure 2: Module Interconnection Diagram Analogue Path 18. Analogue signals are input via external connector SK1 of the transmitter PCB and internal connectors TL8 and TL9. The level is adjusted via RV1 (VOX keying module PCB) and output is via connectors TL1 and TL2 to the speech input of the transmitter PCB. This presents the correct audio level to the transmitter modulation circuits. Data Mode 19. Data signals are input via external connector SK2 of the transmitter PCB, buffered by TR14 and then fed, via the internal connector PL1-4, to the VOX keying module. Page 3 - 6 TM1184 Issue 1 Decoding 20. The VOX keying module decodes the incoming encoder serial data into the two logic signals shown in Table 1. RPT 633 Table 1: VOX Keying and Mode Signals NOTE: Tx KEY is active low. Tx KEY

(PL1-2) MODE

(PL1-3) TRANSMITTER STATE Low Low High Low High Data Mode Speech Mode Low/High Off OPERATION General 21. 22. 23. Components IC1a and IC1b are negative edge retriggerable monostables having output pulse widths of 4.5ms (OA) for the Mode signal and 2ms (OB) for the CLK signals to IC2. TR1 and associated components are not used in these transmitters and are therefore by-passed via LK1 and LK2. Power-Up At power-up R4 and C5 hold IC2 CLR input low. This causes IC2 pin 3 (QC) to route a low signal to IC3-6. Integrated circuit IC1a-6 routes a low signal to IC3-5, which results in the Tx Key signal at PL1-2 remaining high and holding the transmitter keyed off. Data Path To key the VOX keying module for data mode, the incoming data stream, via PL1-

4, LK1, LK2, TP2 to IC1a-5, retriggers IC1a for the duration of the data. IC1a-7 routes a low Mode signal via PL1-3 to set the transmitter into data mode whenever data is present. Integrated circuit IC1a-6 (OA) routes a high signal to IC3-5. This results in a low Tx Key signal via LK4 illuminating D3 and, via PL1-2, Keying on the transmitter. TM1184 Issue 1 Page 3 - 7 RPT 633 Switching to Speech 24. To switch into the speech mode, either as part of a speech paging call or for open channel speech, the encoder generates two 1ms pulses 4ms apart as shown in Figures 3 and 4. Figure 3: Speech Call Figure 4: Open Channel Speech 25. 26. 27. 28. The pulses are inverted at PL1-4 and the leading edge of the first pulse results in IC1-6 (OA) going high which switches PL1-2 low for 4.5ms (see Figure 3). The trailing edge of the first pulse results in IC1-7 and IC3-1 presenting two lows to IC3-

12 and IC3-11 respectively, so that IC2-1 goes high. This has no immediate effect on the circuit since the resetting of IC1a after 4.5ms removes one of the two low states which caused J to go high. The negative-going edge at IC1-6 clocks IC1b so that IC1-10 goes high for 2ms. The trailing edge of the second pulse sets IC2-1 high again, but this time IC1b resets after 2ms, clocking IC2-12 and resulting in IC2-3 going high. This ensures that IC3-4 remains low during the speech mode. 4.5ms after the commencement of the second pulse, IC1-7 resets high so that the transmitter is now keyed in the speech mode. Timings of IC1a and IC1b, controlled by RV2 and RV3 respectively, are absolutely crucial to the reliable switching of the circuit into speech and must be accurately set. Page 3 - 8 TM1184 Issue 1 RPT 633 Switching from Speech to Data 29. The speech cancel signal consists of 1.25s of binary 1s. In the speech mode IC1-7 is high with the result that IC2-1 is low. The negative-going leading edge of the first bit of data clocks IC1a so that IC1-7 goes low, switching PL1-3 to the low DATA mode. The negative-going transition at IC1-5, IC1a times out with the result that:

a) IC1-7 goes high putting PL1-3 into the quiescent condition. b) IC1-6 clocks IC1b for 2ms. c) The combined lows at PL1-4 and IC1-6 result in IC2-4 going high. 30. As IC1-10 goes low again, after 2ms, it clocks IC2 with the result that IC2-3 goes low, IC3-4 goes high and PL1-2 returns to its quiescent high condition. Figure 5: Switching Into Speech TM1184 Issue 1 Page 3 - 9 RPT 633 Figure 6: Switching From Speech Page 3 - 10 TM1184 Issue 1 SECTION 4 INSTALLATION AND COMMISSIONING CONTENTS:

1. 2. 3. 4. 5. 6. 8. 9. INTRODUCTION INSTALLATION Positioning Shelf Mounting Wall Mounting Antenna Modulation Inputs Power Supply COMMISSIONING TABLES 1. 2. 3. Encoder Mounted in a Card Frame Assembly Encoder Mounted in a Single Slot Housing Operating Instructions FIGURES 1. 2. 3. Mounting Hole Diagram Rear Panel Connections Typical Access 340 System Configuration _______________________ INTRODUCTION RPT 633 Page 4 - 4 4 - 4 4 - 5 4 - 2 4 - 3 4 - 3 1. Section 4 of this manual details the Installation and Commissioning procedures to be carried out on a new equipment. TM1184 Issue 1 Page 4 - 1 RPT 633 INSTALLATION Positioning CAUTION DO NOT MOUNT OVER A HEATER OR RADIATOR, OR IN DIRECT SUNLIGHT AND ENSURE A DRY ENVIRONMENT. 2. 3. 4. Carefully unpack the transmitter, power supply and antenna. Site the transmitter and power supply in a convenient working position within reach of an AC power outlet and within 1km of the encoder. Shelf Mounting Lay the transmitter on a suitable horizontal shelf on its integral mounting feet

(sloping panel upwards). Connect the antenna as indicated in paragraphs 5 or 6 and the remainder of the electrical connections as paragraph 7. Wall Mounting Mark and drill the wall as shown, suitable for No 8 plugs and round-head screws. Insert screws into plugs with the top of the screw head a maximum of 10mm from the wall and the bottom of the screw head a minimum of 5mm from the wall. Remove the rubber pads from the bottom of the base tray and hook the transmitter onto the screws. The transmitter can be mounted either antenna up or antenna down. 155 105 PSG/10290-1 Dimensions in mm Figure 1: Mounting Hole Diagram Page 4 - 2 TM1184 Issue 1 Antenna 5. Two versions of the UHF antenna are available, a straight vertical whip for wall mounted transmitters and a right angled whip for shelf mounted transmitters. RPT 633 Figure 2: Rear Panel Connections Modulation Inputs 6. When connecting the transmitter to an RPE 340 series encoder, SK1 and SK2 should be connected as shown in Figure 3. TELEPHONE JUNCTION BOX OR SOCKET POWER SUPPLY POWER SUPPLY 0301-0193 ENCODER RPE 340/341 ANALOGUE BLACK LEADS ANALOGUE OR TEL I/F 0360-9602 DTMF/

MODEM/

SPEECH DATA/

DLC PSU 0360-8623 TERMINAL BLOCK TRANSMITTER RPT 633 DIGITAL RED & WHITE LEADS DIGITAL Figure 3: Typical Access 340 System Configuration PSG/10287-1 TM1184 Issue 1 Page 4 - 3 RPT 633 7. When connecting an RPT 633 transmitter to a Access 3000, it is first necessary to use Engineering Mode Test 50 to configure the Encoder into the Non-DTMF mode. The connections shown in Table 1 and 2, as applicable, should then be made between the encoder and transmitter. Table 1: Encoder Mounted in a Card Frame Assembly SIGNAL NAME ENCODER D TYPE PIN No. PIN No. CABLE TYPE Data 0V Speech {

29c 30a 12a 12c 9 23 17 4 COLOUR

*TRANSMITTER CODE Orange

} 0401-0009 {

{ White/Blue

} 0401-0011 {

Violet Yellow INPUT

} SKT2

} SKT1

{left

{right

{right

{left

* As seen from the rear of the transmitter. Table 2: Encoder mounted in a Single Slot Housing SIGNAL NAME ENCODER PIN No. MODULAR JACK PIN No. CABLE TYPE COLOUR *TRANSMITTER CODE INPUT Data 0V Speech {

29c 30a 12a 12c 7 6 2 4

} 0301-0092 {

Yellow Blue

} SKT2

} 0301-0091 {

Orange Red

} SKT1

{left

{right

{right

{left

* As seen from the rear of the transmitter. 8. Power Supply Ensure that the power supply is correctly rated for your application and has the correct mains connector. Insert the power supply outlet plug into SK3 at the rear of the unit and plug the supply into the mains socket. Page 4 - 4 TM1184 Issue 1 COMMISSIONING 9. Refer to Table 3 and carry out the operating procedures as detailed for the RPT 633 transmitter. RPT 633 Table 3: Operating Instructions ENCODER REFERENCE Access 1000 Access 3000

} LCU Operator's Guide

} 9261-0382 or 9261-0682 RPE 340 RPE 341

} TM1158, Section 2, paragraphs 19-40

RPE 340A TM1154, Section 4, paragraph 4.3 RPE 350 TM1164, Section 4, paragraph 11 TM1184 Issue 1 Page 4 - 5 RPT 633 INTENTIONALLY BLANK Page 4 - 6 TM1184 Issue 1 RPT 633 SECTION 5 SERVICING CONTENTS:

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. INTRODUCTION REPAIR POLICY TEST EQUIPMENT DISMANTLING AND RE-ASSEMBLY INSTRUCTIONS Access to Circuit Boards Removing the VOX Keying Module Removing the Transmitter Board Re-Assembly TRANSMITTER BOARD ALIGNMENT PROCEDURE Initial Settings Initial Connections Setting up Phase Lock Loop Transmitter Alignment Setting Data Deviation and Centre Frequency Setting Analogue Modulation 14. VOX KEYING MODULE ALIGNMENT PROCEDURE ANTENNA CUTTING Introduction Cutting 15. 16. 17. FAULT-FINDING TABLES 1. 2. 3. 4. Data Deviation Analogue Deviation Antenna Lengths Test Points Page 5-7 5-8 5-9 5-10 TM1184 Issue 1 Page 5 - 1 RPT 633 CONTENTS: (Continued) FIGURES 1. 2. Transmitter Layout: Variables, Links and Test Points Antenna Cutting _______________________ INTRODUCTION Page 5-4 5-9 1. 2. Section 5 details the dismantling and reassembly instructions, alignment procedure and the test equipment required to carry out the procedure. The transmitter contains two printed circuit boards (PCB's). It is recommended that field service engineers carry one complete VOX Keying Module for on-site replacement and subsequent base repair of the faulty board. REPAIR POLICY In Section 6 is a list of spare parts for servicing the transmitter board down to component level. Passive chip components (capacitors and resistors) are unlikely to contribute to failure of the equipment in the field. Chip transistors and diodes should be ordered in strips of 10 or more. A replacement antenna will need to be cut to length before fitting, according to the information given in paragraph 17. TEST EQUIPMENT 3. The following test equipment is required to carry out the repair procedure. C DC Power Supply 18V, 1A. C C C C Absorption Wattmeter, 5W 420-470MHz, or Thruline RF Power Meter 5W, 420-470MHz with Power Attenuator 5W, 20-30dB. Frequency Counter 500MHz, accuracy 1 part in 10 or better. 7 Audio Signal Generator. C Modulation Meter. C Oscilloscope. Page 5 - 2 TM1184 Issue 1 RPT 633 DISMANTLING AND RE-ASSEMBLY INSTRUCTIONS CAUTION STATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. CARE MUST BE TAKEN TO ENSURE DAMAGE TO THESE DEVICES IS NOT CAUSED BY HIGH LEVELS OF STATIC ELECTRICITY. SPARE BOARDS OR COMPONENTS SHOULD BE STORED IN ANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT. Access To Circuit Boards Disconnect the antenna and connectors from the rear of the case. At the rear of the unit unscrew and remove the two retaining screws. Lift the top cover at the rear and invert it so that it slides under the base from the front, ensuring that the ribbon cable and the two screened cables are not strained. Removing the VOX Keying Module Disconnect the ribbon cable at the keying module. De-solder the two screened cables at the transmitter board. Remove the four screws which secure the keying module to the lid and remove the module. Removing the Transmitter Board Disconnect the ribbon cable at the transmitter board. De-solder the two screened cables at the transmitter board. Remove the four nuts which secure the board to the base and remove the board. 4. 5. 6. Re-Assembly 7. Re-assembly is the reverse of the procedure for dismantling. TM1184 Issue 1 Page 5 - 3 RPT 633 Figure 1: Transmitter Layout: Variables, Links and Test Points Page 5 - 4 TM1184 Issue 1 RPT 633 TRANSMITTER BOARD ALIGNMENT PROCEDURE Initial Settings 8. Set the variable components and links as follows:

VC1 - Anywhere. VC2 - Half Meshed. VC3 - Fully Un-meshed. VC4 - Fully Un-meshed. VC5 - 25% Meshed. FL1 and FL2 - Adjusters standing proud by 2mm. RV1 - Fully Anti-clockwise. RV2 - Mid Position (15 turns from either end). RV3 - Anywhere RV4 - Mid Position LK1 - Position 2-3 Normal Version. Position 1-2 FTZ Version. LK2 - Position 1-2 Output frequencies less than 447MHz. Position 2-3 Output frequencies greater than or equal to 447MHz. LK3 - Position 2-3 Normal Operation. Position 1-2 Invert Data Sense. Initial Connections 9. Set up the test equipment as follows:

a) Connect the absorption wattmeter or power meter to the antenna socket using a lead no longer than 300mm. b) Connect the modulation meter and frequency counter to the attenuated output. c) Connect the power supply to SK3. d) Connect the audio signal generator via a 0.47F capacitor to SK1. TM1184 Issue 1 Page 5 - 5 RPT 633 Setting up Phase Lock Loop 10. Set up the Phase Lock Loop as follows:

a) Switch on the power supply. b) Connect the oscilloscope to TP3. c) Adjust the slug of L1 to give 5V 0.2V DC at TP3. Transmitter Alignment 11. To align the transmitter carry out the following procedure:

a) Connect the oscilloscope to TP7. d) Adjust RV3 to give 0V 50mV DC at TP7. c) Key ON the transmitter by shorting TP2 to TP9. d) On FL1 and FL2 turn the four adjusters turn at a time until the power meter indicates or the power supply current increases. e) If no power appears slightly adjust VC2 or VC3 and repeat (d). f) Tune the four adjusters of FL1 and FL2 for maximum power. g) Tune VC1, VC2 and VC3 for maximum power and then RV1 to give a power meter reading of 2.5W. h) Re-adjust VC1, VC2 and VC3 for maximum power then RV1 for 2.5W 0.2W. Setting Data Deviation and Centre Frequency 12. To set the data deviation and centre frequency carry out the following procedure:

NOTE: The purpose of this adjustment is to set the deviation, i.e. for 25kHz channel spacing, to 4.5kHz (9kHz total) when the data polarity switch is set from "1" to "0". a) Set LK3 of the VOX keying module to AB to select the DATA mode. b) Connect TP14 to TP15 (+5V) to select the binary 1 state. Page 5 - 6 TM1184 Issue 1 RPT 633 c) Measure the output frequency to the nearest 10Hz; switch the data polarity to the binary O state by connecting TP14 to TP9 and again measure the output frequency. Adjust RV2 and repeat this process until the difference between the two frequencies is as given in the TOTAL DEVIATION column in Table 1 for the appropriate transmitter channel spacing, with a tolerance of 100Hz. d) Using a plastic trimming tool adjust VC5 until the mean of the two frequencies measured at (c) is within 100Hz of the specified center frequency of the transmitter. e) Repeat sub-paragraphs (c) and (d) as necessary. f) Switch the mode switch to ANALOGUE by setting LK3 on the VOX keying module to AC and adjust RV3 to give the specified centre frequency of the transmitter to a tolerance of 100Hz. Table 1: Data Deviation CHANNEL SPACING DEVIATION TOTAL DEVIATION kHz 25 20 12.5 10 kHz 4.5 3.6 2.25 1.8 kHz 9 7.2 4.5 3.6 Setting Analogue Modulation 13. To set the analogue modulation carry out the following procedure:

a) Set LK3 of the VOX keying module to AC to select the ANALOGUE mode. d) Set the audio generator output to 1.25kHz at a level of approximately 11mV peak-to-peak as measured on the oscilloscope. Monitor the deviation on the modulation meter. c) Refer to Table 2(a) and adjust the generator output level to give give a deviation corresponding to the channel spacing. d) Increase the signal generator output level by 20dB and adjust RV4 to give a deviation coresponding to that given in Table 2(b). This should be the larger of the Peak + or Peak - readings on the modulation meter. e) Reduce the signal generator level by 20dB and re-adjust its level to give a deviation corresponding to that given in Table 2(c). TM1184 Issue 1 Page 5 - 7 RPT 633 f) Increase the signal generator level by 20dB and re-adjust RV4 to give a deviation corresponding to that given in Table 2(b). g) Vary the signal generator frequency between 300Hz and 2.5kHz and check that the deviation does not exceed that given in Table 2(d). If it does, tune to the frequency that gives the maximum deviation and adjust RV4 to give a deviation corresponding to that given in Table 2(e). This should also be the larger of the Peak + or Peak - readings. Table 2: Analogue Deviation CHANNE DEVIATION DEVIATION DEVIATION DEVIATION DEVIATION L SPACING kHz 25 20 12.5 10

(a) kHz 3 2.4 1.5 1.2

(b) kHz 4.75 3.8 2.4 1.85

(c) kHz 3 2.4 1.5 1.2

(d) kHz 5 4 2.5 2

(e) kHz 4.9 3.9 2.4 1.9 VOX KEYING MODULE ALIGNMENT PROCEDURE 14. To set the timing circuits of the VOX Keying Module carry out the following procedure:

a) With the RPE340 in the Engineering Mode, initiate Function 2, RPT calibration signal. Alternatively use a P391 Test A7 to generate the same signal. b) Monitor TP6 and adjust RV2 so that the mark/space ratio is 4.4/3.6ms. c) Monitor TP3 and adjust RV3 so that the mark/space ratio is 2.6/5.4ms. ANTENNA CUTTING Introduction 15. In the event of damage to the antenna, the replacement will require cutting to length in accordance with the following instructions. Cutting 16. The antenna is a one piece UHF stub with internal connector. With reference to Figure 1 after removal of the cap, the antenna should be cut to the length indicated in Table 3, depending on frequency, and the cap replaced. The Part Numbers of the uncut stubs are 5501-0001 (right angled) and 5501-0002 (straight). Page 5 - 8 TM1184 Issue 1 RPT 633 Table 3: Antenna Lengths CUT LENGTH FREQUENCY mm 156 154 152 150 149 147 145 143 142 140 139 MHz 420 425 430 435 440 445 450 455 460 465 470 Figure 2: Antenna Cutting TM1184 Issue 1 Page 5 - 9 RPT 633 FAULT-FINDING WARNING GREAT CARE MUST BE TAKEN TO AVOID BREAKING OPEN THE ENCAPSULATION OF TR10 ON THE TRANSMITTER BOARD WHEN REPAIR OR COMPONENT REPLACEMENT IS BEING CARRIED OUT, AS THIS COMPONENT CONTAINS TOXIC BERYLLIUM OXIDE. 17. Table 4 shows the signals to be expected at the various test points as an aid to fault-finding. Table 4: Test Points T.P. SIGNAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Carrier Frequency Tx Key (low-going) PLL Control Voltage (nominally 5V) VCO Frequency (div. by 256) Crystal Frequency In-Lock (high going) Modulating Signal

-12V 0V Audio Signal (limited) Audio Signal (un-limited) Over-rides Lock Fail when connected to TP13

+12V Data

+5V Page 5 - 10 TM1184 Issue 1 RPT 633 SECTION 6 SPARE PARTS LIST CONTENTS:

1. GENERAL 2. MODULES TRANSMITTER BOARD COMPONENTS Capacitors Connectors Crystals Diodes Inductors Integrated Circuits Links Resistors Transducers Transformer Transistor Antenna BANDED COMPONENTS Filters Capacitors VOX KEYING MODULE COMPONENTS Capacitors Connector Diodes Integrated Circuits Resistors Transistor 3. 4. 5. 6. 7. 8. 9. 10. 11 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. TM1184 Issue 1 Page 6 - 1 RPT 633 ITEM/CIRCUIT REFERENCE 1. GENERAL 2. MODULES DESCRIPTION PART NO. INSERT MOULDING SCREENED 8-WAY INTER CONNECT FLEXFOIL MOULDING COVER CLAMPING PAD ADHESIVE NUT M3 ESCUTCHEON WASHER PLAIN M3 LABEL EQUIP. RUBBER FEET 23MM SCREW No. 6X16MM PAN HD POZI AB ASSY PCB VOX KEYING MODULE PSU 240V UK PLUG PSU 220V EURO PLUG PSU 110V TRANSMITTER BOARD COMPONENTS 3. Capacitors C1,10,12,40,80 C2,47,72,74,111,117 C3,7,15,18,19,22,23,24,27,30 C4 C5,53,55 CAP CHIP 220p 10% 50V CAP AL 10F 20% 16V CAP CHIP 1n 10% 50V CAP CHIP 1p 0.25p 50V CAP CHIP 3p9 0.25p 50V C8,62,63,64,108,109 C9,90,91,92,93 C11 C13,35 C14,54 C16,17,36,67,68,75,79,85,87 C20,38,41,46,49,52,66,95 C21,26,32,34,43,48,61,78,88,94, 102 C25,60 C28,29 C31,33,73,76,77 C39,118,129 C42 C44 C45,70,116 CAP AL 4F7 20% 25V CAP AL 22F 20% 16V CAP CHIP 4p 0.25p 50V CAP CHIP 10p 0.25p 50V CAP CHIP 1p8 0.25p 50V CAP CHIP 4n7 10% 50V CAP CHIP 100n -20+80% 25V CAP CHIP 220p 10% 50V CAP CHIP 5p6 0.25p 50V CAP CHIP 33p 5% 50V CAP CHIP 1n 10% 50V CAP CHIP 10n 10% 50V CAP CHIP 22p 5% 50V CAP CHIP 4p7 0.25p 50V CAP CHIP 1F 20% 16V 0960-9887 4404-0001 0860-9846 1861-0225 1 9 6 6 3 2060-9878 20662 31600X7 33996 8204-0616 0260-7083 0301-0605 0301-0606 0301-0607 3301-0150 3401-0089 3301-0100 3301-0001 3301-0008 3401-0093 3401-0090 3301-0151 3301-0013 3301-0004 3301-0108 3301-0149 3301-0081 3301-0010 3301-0025 3301-0100 3301-0112 3301-0021 3301-0009 3306-0020 Page 6 - 2 TM1184 Issue 1 ITEM/CIRCUIT REFERENCE DESCRIPTION PART NO. RPT 633 3. Capacitors (Continued) C50,56,57 C51,89,113,132,133 C58 C59 C65 C69 C71,100 C81 C82 C83,84 C86 C96,101 C97,120,122 C98,104 C99,103 CAP CHIP 3p3 0.25p 50V CAP CHIP 47p 5% 50V CAP CHIP 6p8 0.25p 50V CAP CHIP Op75 0.25P 50V CAP AL 1000F -10+50% 40V CAP CHIP 2n2 10% 50V CAP POLYTR 330n 10% 63V CAP CER 180p N750 100V CAP CER 150p 2% 100V CAP CER 22p 2% 100V CAP CHIP 8p2 0.25p 50V CAP PLYPRP 6n8 2.5% 63V CAP CHIP 180p 5% 50V CAP PLYPRP 10n 2.5% 63V CAP PLYPRP 4n7 2.5% 63V C105,107,114,115,124,125,126 C106 C110,112,128,131 C119 C127,130 CAP CHIP 220p 10% 50V CAP PLYPRP 2n2 2.5% 100V CAP CHIP 100n -20+80% 25V CAP AL 100F 20% 6.3V CAP CHIP 220p 10% 50V VC1 VC2,3,4 VC5 CAP CHIP TRIM 10p CAP VARIABLE 2-10p CAP VARIABLE 4-40p Connectors 4. SK1,2 SK3 SK4 5. Crystals XL1 XL1 OV1 6. Diodes D1 D2 D3,4 D5 PLUG 2-WAY SOCKET 2.1mm PCB MOUNT SKT RF COAX PANEL SOCKET 2-WAY XTAL GENERIC SPEC XTAL GENERIC SPEC (HIGH STABILITY) CRYSTAL OVEN PLC1-27-12-75 DIODE VARICAP KV1310A-3 DUAL DIODE ZENER CHIP BZX84C10 DIODE CHIP BAR 18 DIODE CHIP BAV99 3301-0007 3301-0029 3301-0011 3301-0251 3402-0001 3301-0104 3304-0010 3302-0231 3302-0151 3302-0141 3301-0012 3303-0003 3301-0043 3303-0004 3303-0002 3301-0081 3303-0009 3301-0149 3401-0084 3301-0081 3506-0002 3501-0002 3501-0005 4501-0002 4431-0012 4414-0001 4501-0001 3904 3905 6201-0001 3701-0027 3703-0017 3703-0004 3703-0001 TM1184 Issue 1 Page 6 - 3 RPT 633 ITEM/CIRCUIT REFERENCE 6. Diodes (Continued) D6,7 D8 D9,10,11 7. Inductors DESCRIPTION PART NO. DIODE ZENER CHIP BZX84C5VI DIODE MV2109 DIODE CHIP BAT54 L1 L2 L3,4 L5 L6 L7 L8,9,11,12 L10,19,20,21 L13 L14,15,16 L17,18 L22 COIL MC111 SERIES INDUCTOR 2F2H INDUCTOR 470nH INDUCTOR 10TURN AIR COIL AIR COIL INDUCTOR 220nH INDUCTOR 22nH INDUCTOR 100nH ASSY COIL INDUCTOR 1mH INDUCTOR 6F8 8. Integrated Circuits IC1 IC2 IC3,4 IC5 IC6 IC7 IC8 IC9 IC10,12 IC11 IC13 IC14 9. Links IC 560CDP VOLT REG 78L82AWC VOLT REG 7812C VOLT REG 7805 IC 74HCTO5 IC 14568BCP IC HEF4069 SMD HEX INVERTER IC SP4660DP IC OP. AMP. LM348D IC 7661 IC OP AMP MC 1458ND VOLTAGE REG ICL8069.REF:1.2V 3703-0010 3701-0001 3703-0044 4609-0001 4102-0009 4102-0005 4160-6235 4160-6236 4160-6237 4102-0003 4102-0050 4102-0001 605753 4102-0025 4107-0002 3803-0003 95520 6001-0002 6001-0001 3819-0014 3802-0001 3819-0007 3803-0001 3819-0003 3803-0025 3818-0001 6002-0026 LK1,2,3 2-WAY JUMPER LINK (GOLD PLATED) 4408-0001 Page 6 - 4 TM1184 Issue 1 RPT 633 DESCRIPTION PART NO. ITEM/CIRCUIT REFERENCE 10. Resistors R1 R2,12,17,63 R3,52,96 R4,6,9,14,24,47,61,62,80,87 R5,7,8,64,73 RES CHIP 15k 5% 0.125W RES CHIP 2k2 5% 0.0625W RES CHIP 68R 5% 0.0625W RES CHIP 6k8 5% 0.0625W RES CHIP 33k 5% 0.0625W R10,26,59,90 R11 R13 R15,45,86 R16,67,68,69,79,100 R18,19,37 R20 R21 R22 R23,25,29,74,109,115 R27,34 R28,39,40,99 R30,33,106 R31 R32,91 R35,104 R36 R41,42 R43,53,58,117,119 R44,84,124 R46,107,111,114,121,123 R48 R49 R50 R51,55,56,57,83 R54 R60 R66,75,77,97 R65,72,88 R76,89 R81,85 R82 R92,101 R93,94,98 R95 RES CHIP 560R 5% 0.0625W RES CHIP 22R 5% 0.0625W RES CHIP 3k3 5% 0.125W RES CHIP 15k 5% 0.0625W RES CHIP 10k 5% 0.0625W RES CHIP 220R 5% 0.0625W RES CHIP 3k9 5% 0.0625W RES CHIP 10R 5% 0.125W RES CHIP 100R 5% 0.125W RES CHIP 4k7 5% 0.0625W RES CHIP 47R 5% 0.0625W RES CHIP 33R 5% 0.0625W RES CHIP 470R 5% 0.0625W RES CHIP 15R 5% 0.0625W RES CHIP 1k2 5% 0.0625W RES CHIP 10R 5% 0.0625W RES CHIP 18k 5% 0.0625W RES MF 100R 1% 0.6W RES CHIP 100R 5% 0.0625W RES CHIP 22k 5% 0.0625W RES CHIP 1k0 5% .0625W RES CHIP 7k5 5% 0.0625W RES CHIP 1k5 5% 0.0625W RES CHIP 56k 5% 0.0625W RES CHIP 39k 5% .0625W RES MF 4R7 1% 0.6W RES CHIP 330R 5% .0625W RES CHIP 47k 5% .0625W RES CHIP 82k 5% .0625W RES CHIP 68k 5% 0.0625W RES CHIP 8k2 5% .0625W RES CHIP 27k 5% .0625W RES CHIP 100k 5% 0.0625W RES CHIP 2k7 5% 0.0625W RES CHIP 330k 5% 0.0625W 3101-0174 3105-0179 3105-0143 3105-0191 3105-0207 3105-0165 3105-0131 3101-0158 3105-0199 3105-0195 3105-0155 3105-0185 3101-0098 3101-0122 3105-0187 3105-0139 3105-0135 3105-0163 3105-0127 3105-0173 3105-0123 3105-0201 3103-0188 3105-0147 3105-0203 3105-0171 3105-0192 3105-0175 3105-0213 3105-0209 3103-0156 3105-0159 3105-0211 3105-0217 3105-0215 3105-0193 3105-0205 3105-0219 3105-0181 3105-0231 TM1184 Issue 1 Page 6 - 5 RPT 633 ITEM/CIRCUIT REFERENCE 10. Resistors (Continued) R102 R103,110,113,122 R105 R108 R116 R118,120 TH1 RV1 RV2 RV3 RV4 11. Transducer DESCRIPTION PART NO. RES CHIP 820R 5% .0625W RES CHIP 10k 5% 0.0625W RES CHIP 1k8 5% 0.0625W RES CHIP 6k8 5% .0625W RES CHIP 3k3 5% 0.0625W RES CHIP 150R 5% .0625W THERMISTOR 10k POT CERMET 100R POT MULTITURN 10k POT MULTITURN 5k POT CERMET 2k2 3105-0169 3105-0195 3105-0177 3105-0191 3105-0183 3105-0151 3211-0002 3202-0001 3208-0010 3208-0009 3202-0005 LS1 TRANSDUCER 5001-0001 12. Transformer T1 ASSY TRANSFORMER 0460-6222 13. Transistors TR1,13,14 TR2 TR3,12 TR4,6 TR5 TR7,8 TR9 TR10 TR11 14. Antenna TRANS BCW61C TRANS MMBFU 310 TRANS BCW33 TRANS BFS 17 TRANS BCW31 TRANSISTOR BFR96-02 TRANSISTOR MRF559 TRANSISTOR MRF630 TRANSISTOR BFS19 3602-0018 3602-0008 3602-0010 3602-0001 3602-0011 3601-0001 3601-0003 3601-0012 3602-0003 ANTENNA RPE303 FLEXIBLE STRAIGHT ANTENNA 5501-0001 5501-0002 Page 6 - 6 TM1184 Issue 1 ITEM/CIRCUIT REFERENCE BANDED COMPONENTS 15. Filters FL1,2 FL1,2 FL1,2 16. Capacitors C6 C6 C6 RPT 633 DESCRIPTION PART NO. FILTER HELICAL 252-MX-1547A BAND 1 FILTER HELICAL 252-MX-1549A BAND 2 FILTER HELICAL 252-MX-1551A BAND 3 4605-0005 4605-0006 4605-0007 CAP CER 10p 0.25p 63V BAND 1 CAP CER 10p 0.25p 63V BAND 2 CAP CER 8p2 0.25p 63V BAND 3 3302-0099 3302-0099 3302-0098 VOX KEYING MODULE COMPONENTS 17. Capacitors C1 C2,3,5,6,7 C4 C8 18. Connector CAP AL 22FF 20% 16V CAP POLYTR 100n 10% 63V CAP POLYTR 220n 10% 63V CAP AL 10F 20% 35V 3401-0008 3304-0002 3304-0009 3401-0100 PL1 8-WAY PLUG RT ANGLED 4303-0044 19. Diodes D1,2 D3 20. Integrated Circuits DIODE 1N4148 INDICATOR LED HLMP1700 17535 3704-0011 IC1 IC2 IC3 IC 4538 IC 74HC107 IC 74HCO2 3802-0043 3801-0049 95993 TM1184 Issue 1 Page 6 - 7 RPT 633 ITEM/CIRCUIT REFERENCE Resistors 21. R1 R2 R3 R4 R5 R6 RV1 RV2,3 22. Transistor DESCRIPTION PART NO. RES MF 39k 1% 0.6W RES MF 10k 1% 0.6W RES MF 680R 1% 0.6W RES MF 100k 1% 0.6W RES MF 1k5 1% 0.6W RES MF 47k 1% 0.6W POT CERMET 2k2 POT CERMET 220k 3103-0250 3103-0236 3103-0208 3103-0260 3103-0216 3103-0252 3202-0005 3202-0011 TR1 TRANSISTOR BC183L 95785 Page 6 - 8 TM1184 Issue 1 APPENDIX 1 UHF SERIAL ENCODER MODEL RPE 673 CONTENTS INTRODUCTION ROLE PHYSICAL CONSTRUCTION SPECIFICATION Encoder Connectors 1. 2. 3. 4. 5. 7. OPERATING INSTRUCTIONS 8. TECHNICAL DESCRIPTION PRE-INSTALLATION CHECKS 13. Unpacking 14. Tools required 15. Test Equipment required INSTALLATION PROCEDURE 16. Wall Mounting 17. Software Configuration 24. Parameter Definitions 26. Connecting the External Device 30. Audio Connection 31. Direct Line Contacts (DLCs) 35. Antenna TM 1184 Issue 1 AL1 (May 1997) Page A1 - 1 RPE 673 CONTENTS (Continued) SERVICING 37. Repair Policy 39. Removal / Re-fitting of Circuit Boards 44. Transmitter Alignment - Initial settings 46. Setting up the Phase Lock Loop 47. Transmitter Alignment 48. Setting Data Deviation and Centre Frequency 49. Setting Analogue Deviation 50. FAULT FINDING 51. ANTENNA CUTTING 52. SPARE PARTS LIST TABLES 1. 2. 3. 4. 5. 6. Encoder SK1/SK2 Pin Outs P910 Connections P911 Connections DLC Connections Data Deviation Analogue Deviation FIGURES Encoder Connections 1. 2. Wall Mounting Template 3. 4. 5. 6. 7. 8. 9. Set-up Menu P910/P911 Connector Pin Layout External Connections Serial Encoder - Service Layout Transmitter PCB Layout Test Menu Options Serial Encoder Interconnection Diagram Page A1 - 12 A1 - 12 A1 - 13 A1 - 14 A1 - 21 A1 - 22 A1 - 5 A1 - 7 A1 - 8 A1 - 13 A1 - 15 A1 - 16 A1 - 18 A1 - 20 A1 - 24 Page A1 - 2 TM 1184 Issue 1 AL1 (May 1997) 1. 2. INTRODUCTION This Appendix outlines the installation and operation of the Radio Paging Serial Encoder (Transmitter/Encoder) model RPE 673. The Serial Encoder utilises the existing RPT 633 Transmitter PCB and, whenever necessary, reference is made to the appropriate section in the main body of this manual. ROLE The Multitone RPE 673 is a single channel radio paging Serial Encoder operating in the UHF frequency band. The Serial Encoder provides paging facilities for Mk6 or Mk7 code format alphanumeric and speech radio paging systems. The Serial Encoder can be used to call up to 10,000 radio paging receivers. PHYSICAL CONSTRUCTION 3. The RPE 673 consists of an Encoder PCB combined with a 2.5W Transmitter PCB (as used in RPT 633) together in one moulded plastic housing. SPECIFICATION NOTE:

For Transmitter characteristics and crystal frequency calculation refer to Section 1. Encoder 4. The performance characteristics of the Encoder are as follows:

a) Protocol:

ESPA 4.4.4. or MEP (Determined by firmware) b) Code Format:

Multitone Mk6 or Mk7 (Programmable) c) Paging Addressees:

d) Beep Codes:

10,000 Eight e) Message Transmission:

Up to 60 alphanumeric characters f) Speech Transmission:

Duration is unlimited and under the control of the External Device (speech is applicable only when ESPA 4.4.4. protocol is used) TM 1184 Issue 1 AL1 (May 1997) Page A1 - 3 RPE 673 Connectors 5. The RPE 673 Serial Encoder is fitted with the following external connectors:

a) b) c) d) SK1:

Audio Input Two pin moulded socket (600 Ohm) SK2: Not Used SK3: Power Supply Unit Four-way FCC68 socket SK4: Antenna TNC (50 Ohm) 6. In addition, the following internal connectors are fitted to the Encoder PCB:

a) b) c) d) e) SK1: Serial Data input Eight-way FCC68 socket SK2: Serial Data input SK3: Remote DLCs 1-4 SK5: Remote DLCs 5-8 SK4: Ground for RS232 / DLCs RS485 Data I/P (Not used) Four-way IDC Four-way IDC Four-way IDC Four-way IDC NOTE:

Physical Characteristics, Operational Environment and Power Supply Options are identical to the RPT 633. OPERATING INSTRUCTIONS 7. The Radio Paging Serial Encoder is fully automatic in use and operation is limited to switching on the mains supply. Page A1 - 4 TM 1184 Issue 1 AL1 (May 1997) TECHNICAL DESCRIPTION NOTE:

For a circuit description of the Transmitter, refer to Section 3. 8. 9. The RPE 673 Serial Encoder provides a communications link between any device with a standard RS232 data output and up to 10,000 paging receivers. Valid data is processed by a purpose built digital Encoder and fed to a 2.5W UHF Transmitter (based upon the RPT 633) for onward transmission. The Encoder is driven by the serial RS232 data input (SK1 or SK2) and the eight DLC inputs (SK3 and SK5) using ESPA 4.4.4 or MEP protocol (as determined by firmware). Receipt of serial data or closure of any DLC causes the Encoder to enter the call generation routine. A paging transmission is assembled in either Mk6 or Mk7 paging code format. The format is selected during installation (refer to paragraph 24). 10. The eight DLC inputs may be used for remotely sited contacts which must close to initiate paging calls. The DLC paging messages can be configured during installation (refer to paragraph 24). 11. Figure 1 illustrates Encoder input / output connections. Power (+5V) is supplied to the Encoder PCB from the Transmitter PCB on PL1-1 and ground is PL1-7. 12. The Encoder PCB also contains circuitry for the signal conditioning of the audio/speech input to the Serial Encoder. PL2 on the Encoder PCB is for factory test purposes only. Tx Rx RTS CTS SK3 SK5 RS232 DATA

(SK1 or SK2) GND (SK4) DLCs 1 - 8 AUDIO (SK1) PSU POWER (SK3) ENCODER RV1 - AUDIO ADJUST P4 P5 P7 P6 1 TL2 TL1 POWER TL9 TL8 TRANSMITTER 6 8 2 3 3 2 8 6 PL1 MODE Tx KEY DATA BEEP PL1 TAG10817- 1 Figure 1: Encoder Connections SK4 ANTENNA TM 1184 Issue 1 AL1 (May 1997) Page A1 - 5 RPE 673 PRE-INSTALLATION CHECKS CAUTION STATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. OBSERVE STATIC SAFETY PRECAUTIONS. Unpacking 13. Unpack the container and examine the contents against the list given below:

a) b) c) d)

RPE 673 Serial Encoder Unit Power Supply Unit, 3-pin plug (UK) or 2-pin (Europe) Antenna Assembly *

Socket, 2-way (4501-0001) Qty 1 Qty 1 Qty 1 Qty 2 Supplied only when requested on Sales Specification Form Tools Required 14. The following tools will be required:

a) b) Screwdrivers - Flat and Cross-Point IDC Insertion Tool Test Equipment Required 15. The following test equipment will be required:

a) b) PC with RS232C serial port P910 Cable Assembly, 9-Way, D-Type or P911 Cable Assembly, 25-Way, D-Type c) 4404-0003 Interconnect Flexible Page A1 - 6 TM 1184 Issue 1 AL1 (May 1997) INSTALLATION PROCEDURE Wall Mounting CAUTION ENSURE THE UNIT IS MOUNTED IN A DRY ENVIRONMENT. DO NOT MOUNT THE UNIT OVER A HEAT SOURCE OR IN DIRECT SUNLIGHT. 16. The unit may be mounted on a suitable horizontal shelf or wall-mounted using the following procedure:

a) Referring to Figure 2 (or using the template supplied with the Serial Encoder), drill holes to accept 8mm plugs and screws. 155 mm TAG 10821-1 Figure 2: Wall Mounting Template b) c) Fit the plugs into the holes and insert the screws into the plugs leaving 5mm clearance between the screw heads and the wall. Remove the four rubber feet from the base and slot the Serial Encoder onto the screw heads. NOTE:

It may not be possible to carry out the Software Configuration using a PC whilst the External Device is connected. It is recommended that the Software Configuration is carried out before connecting the External Device. TM 1184 Issue 1 AL1 (May 1997) Page A1 - 7 RPE 673 Software Configuration 17. To gain access to Encoder socket SK1, remove the two cross-point screws from the rear of the unit. Lift the cover slightly (it will only clear the base by 4 to 5 inches). Carefully disconnect the 8-way flexi-cable from PL1 of both Transmitter and Encoder. Pivoting on its front edge, invert the cover and slide it under the base. Fit test cable 4404-0003 to PL1 of Transmitter and Encoder. 18. Connect the serial port of your PC to SK1 (FCC 68) of the Encoder PCB using the P910 or P911 cable. If using Windows 95, run Hyper-Terminal; if using Windows 3.1, run Terminal.Exe. Configure your serial port as follows: 9600 Baud, 8 Data bits, 2 Stop bits, no Parity bit, Flow Control = Hardware. 19. Connect the external power supply to SK3 of the Serial Encoder. Power up the Serial Encoder, wait 3 seconds and, within a further 10 seconds, press <Enter>; the

(S)et-up / Test Menu should appear on the VDU. Select (S)et-up; the Setup menu should appear on the VDU (see Figure 3). Setup

FIRMWARE M670101 Serial Port: 1200 Baud, 7 Data Bits, 2 Stop, Even Parity Serial Protocol = MEP Options: Timeout = 1 Code Format: Mk 7 System Address: 0 Time-of-Day: Off Time-of-Day User No: 1234 BC Rx No Message DLC

Message 1'

1 Message 2'

2 3 Message 3'

4 Message 4'

. 8 1111 1230 333G 45GG 2 1 1 1

. 1 Message 8'

8910 Choose:-

F T P 1-8 - Edit DLC 1 - 8

- Set Code (F)ormat

- Set (T)ime-of-Day Option

- Change Serial (P)ort Settings S - Set (S)ystem Address U - Set Time-of-Day (U)ser O - Change Serial Protocol (O)ptions Q - (Q)uit Figure 3: Set-up Menu 20. Having accessed the Set-up Menu the following parameters may be set:

F

T

P

1 - 8 -

Code Format Time-of-Day Option Serial Port Settings Edit DLCs S U O Q

System Address Time-of-Day User Serial Protocol Options Quit Page A1 - 8 TM 1184 Issue 1 AL1 (May 1997) 21. Definitions for each parameter are given in paragraph 24. 22. Once a setting has been selected, the following message will be displayed:

....Writing to Eeprom - please wait.....Done and the Set-up screen will again be displayed. 23. For Serial Port Settings however, parameters are not written to the Eeprom until W (Write to Eeprom) is selected from the Serial Port Set-up Menu. Parameter Definitions 24. The Parameter Definitions are as follows:

DLC Configuration Each DLC has a configurable Receiver Number (Rx No), Beep Code (BC) and Message. a) Rx No Four digit code in the range 0000 - 9999. The Rx No will be automatically prefixed with the System Address to form the RIC. Group calls may be initiated in order to call a group of paging receivers within a specified range of addresses by inserting the wildcard character G into the Rx No. If one wildcard character is included as the least significant digit then a group of 10 receivers will be called, eg: 333G will call receivers 3330 to 3339 (where = SystemAddress). If two wildcard characters are included as the two least significant digits then a group of 100 receivers will be called, eg: 45GG will call receivers 4500 to 4599 (where = System Address). b) Beep Code Single digit in the range 1 - 8 c) Message Mk6: Maximum length of 10 characters in the range 0 - 9,

(hyphen) and <Space>. Mk7: Maximum length of 60 characters in the standard ASCII character set ie,<Space> (Hex 20) through to ~ (Hex7E). Serial Port Settings These parameters are for the V24/RS232 port and are set to match the External Device to which the Serial Encoder is connected. The selections are self explanatory however, once the settings have been made, they must be written to the Eeprom by entering W ([W]rite changes to Eeprom). NOTE:

During set-up and test, the Serial Encoder communicates using a fixed set of parameters (9600 Baud, 8 Data Bits, 2 Stop Bits, No Parity Bit). The above Serial Port Settings only take effect during normal operation. TM 1184 Issue 1 AL1 (May 1997) Page A1 - 9 RPE 673 Serial Protocol Options a) MEP:

The only serial option for MEP protocol is the Timeout setting:

Setting 0 1 2 3 Timeout 100 ms 1 second 2 seconds 3 seconds Setting 4 5 6 7 Timeout 4 seconds 5 seconds 6 seconds 7 seconds NOTE:

The Timeout settings are designed to allow flexibility in the response times from different external devices. b) ESPA:

There are two options: <Turn-Round / Response Time and <Suppress Response Option. i) Turn-Round / Response Time:

Setting Turn-Round Time Response Time 0 1 2 3 approx 10ms 30 - 40 ms 100ms 1s 150ms 300ms 3s 10s NOTE: Turn Round time is a delay introduced before transmission allowing intervening hardware, such as convertors or modems, to change configuration or direction. Missed Response time is the period after transmission that the RPE 673 waits for an acknowledgement. ii) Suppress Response - Valid input is <0 (disabled) or <1

(enabled). When enabled, the automatic responses back to the External Device from the RPE 673 will be suppressed (not sent). NOTE: Suppression is beneficial if the operation of the RPE 673 is slow. Code Format Determines the digital data format (Mk6 or Mk7) to be sent by the Serial Encoder. Valid input is 6 or 7. System Address A single numeric digit which must match the most significant digit of the Receiver Identification Code (RIC) for the corresponding paging receiver. Valid input is 0 - 9 for Mk6 and 0 - 3 for Mk7. Time-of-Day If set to 1 (on) then Time-of-Day paging calls will be sent at one-minute intervals Option and, Mk7 paging calls will contain an updated time-stamp. If set to 0 (off) then Time-of-Day calls will not be sent and, Mk7 calls will contain a fixed time-stamp. Page A1 - 10 TM 1184 Issue 1 AL1 (May 1997) Time-of-Day User Number This is a dummy User / Receiver which is used to allow the Time and/or Date to be set. If a call is sent to this receiver then the message content is used to set the system Time and/or Date as follows:

a) b) c) To set the Time, the Time-of-Day User is called with a 4-digit message in the form: HHMM where:

HH represents the Hours digits MM represents the Minutes digits

(00 - 23)

(00 - 59) To set the Date (Mk7 only), the Time-of-Day User is called with a 6-digit message in the form: YYMMDD where:

YY represents the last two digits of the Year MM represents the Month of the Year DD represents the Day of the Month As an alternative, a 10-digit numeric message in the form <<YYMMDDHHMM will set both Time and Date together.

(00 - 99)

(01 - 12)

(01 - 31) NOTE: Mk6 paging receivers must be programmed with System Size set to 10,000 and System Type set to Other. 25. Once set-up is complete, turn off the power supply and disconnect the PC. TM 1184 Issue 1 AL1 (May 1997) Page A1 - 11 RPE 673 Connecting the External Device 26. Connection of the External Device to the RS232 port on the Encoder can be made in one of two ways:

a) b) Connecting the P910 or P911 to Encoder SK1. Connecting an alternative cable to the Krone connections on Encoder SK2. 27. Note that Encoder SK1 and SK2 are connected in parallel; only one socket can be utilised. 28. Pin out details of Encoder sockets SK1 and SK2 are shown in Table 1. Table 1: Encoder SK1 / SK2 Pin Outs SK1 (FCC 68) SK2 Pin 1 Pin 2 Pin 3 Pin 4 Pin 6 Ground TxD RxD CTS RTS Pin 1 Pin 2 Pin 3 Pin 4 CTS RTS RxD TxD NOTE:

If connecting the External Device to SK2, a return connection (signal ground) should be made to 0V on SK4 (pin 1 or pin 2) of the Encoder PCB. 29. Connection details for cable assemblies P910 and P911 are shown in Tables 2 and 3. Pin layout is illustrated in Figure 4. Table 2: P910 Connections 8 Way Modular Jack Plug 9 Way D-Type Connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 5 Signal Ground Pin 2 Transmit Data Pin 3 Receive Data Pin 7 CTS Pin 6 N.C. Pin 8 RTS Pin 4 N.C. Pin 1 N.C. N.C. = Not Connected Page A1 - 12 TM 1184 Issue 1 AL1 (May 1997) Table 3 : P911 Connections 8 Way Modular Jack Plug 25 Way D-Type Connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 7 Signal Ground Pin 3 Transmit Data Pin 2 Receive Data Pin 4 CTS Pin 6 N.C. Pin 5 RTS Pin 20 N.C. Pin 8 N.C. N.C. =Not Connected 8 WAY MODULAR 9 WAY D-TYPE 25 WAY D-TYPE JACK PLUG (P910/911) CONNECTOR (P910) CONNECTOR (P911) PIN 9 PIN 25 PIN 1 PIN 8 PIN 1 TAG 10829-1 PIN 1 Figure 4: P910/P911 Connector Pin Layouts TM 1184 Issue 1 AL1 (May 1997) Page A1 - 13 RPE 673 Audio Connection 30. If required, the audio output from the External Device should be connected to Serial Encoder SK1 using the 2-Way Socket, Part No. 4501-0001 (provided) and suitable cable

(RV1 on the Encoder PCB may be adjusted to compensate for the output level provided by the audio source at the customers premises). Direct Line Contacts (DLCs) 31. DLCs can be a door bell push, a security alarm, a sensor on a piece of machinery etc. Contacts must close to initiate a paging call and should be connected to the Serial Encoder by a twisted-pair wire. 32. The loop resistance of each DLC connection must not exceed 150 S. 33. DLC connections are listed in Table 4. Return connections are made to 0V on SK4

(pin1 or pin 2) of the Encoder PCB. Table 4: DLC Connections SK3 SK5 Pin 1 Pin 2 Pin 3 Pin 4 DLC 1 DLC 2 DLC 3 DLC 4 Pin 1 Pin 2 Pin 3 Pin 4 DLC 5 DLC 6 DLC 7 DLC 8 34. Remove the Interconnect Cable 4404-0003 and re-fit the flexi-cable to PL1 of Transmitter and Encoder. Replace and secure the cover. Antenna 35. Following the manufacturers instructions, connect the antenna to SK4. 36. If using the Whip Antenna, stand the antenna on a flat surface and lay the connecting lead as straight as possible to the Serial Encoder. The best transmission will be achieved with the antenna as high as possible and preferably stood on a metal surface such as a filing cabinet. This will achieve a good ground-plane. Page A1 - 14 TM 1184 Issue 1 AL1 (May 1997) Figure 5: External Connections TM 1184 Issue 1 AL1 (May 1997) Page A1 - 15 RPE 673 TAG10830-1 Figure 6: Serial Encoder - Service Layout Page A1 - 16 TM 1184 Issue 1 AL1 (May 1997) SERVICING Repair Policy 37. The following service policy applies to the RPE 673:

a) b) The Encoder PCB and the Encoder firmware device (IC2) are disposable modules;

both are available as service spares. The Transmitter PCB is repairable to component level (for part numbers, refer to Section 6). 38. Transmitter alignment procedures (paras 45 - 49) rely on the use of a PC for Transmitter keying. For alignment procedures without the use of a PC, refer to Section 5. Removal / Re-fitting of Circuit Boards 39. Disconnect the antenna and connectors from the rear of the case. At the rear of the unit unscrew and remove the two retaining screws. Lift the cover slightly (it will only clear the base by 4 to 5 inches). Carefully disconnect the 8-way flexi-cable from PL1 of the Transmitter. Pivoting on its front edge, invert the cover and slide it under the base. 40. To remove the Encoder board, de-solder the two screened cables from P4, P5, P6 and P7 of the Encoder PCB (see Figure 6). Remove the four screws to release the Encoder PCB. 41. When replacing a suspect Encoder PCB with a service replacement PCB, proceed as follows:

a) b) c) d) e) Remove the suspect Encoder PCB. Remove the replacement Encoder PCB from its packaging. Carefully transfer the firmware device (IC2) from the suspect Encoder PCB to the replacement Encoder PCB. Fit the service replacement Encoder PCB. Carry out the Set-up procedure detailed in paras 18 - 25. 42. To Remove the Transmitter board, de-solder the two screened cables from TL1, TL2, TL8 and TL9 of the Transmitter board (see Figure 6). Remove the four securing nuts to release the Transmitter PCB. 43. Re-assembly is the reverse of dismantling. Replace the 8-Way flexi-cable (removed in paragraph 39) before re-fitting the cover. TM 1184 Issue 1 AL1 (May 1997) Page A1 - 17 RPE 673 TL9 TL8 SK1 SK2 SK3 VC4 PSG10532-1 TL3 TL2 TL1 TP14 TP9 TP11 TP10 TP8 RV4 TP15 TL6 PL1 LK3 RV1 TP2 TL7 RV3 TP7 RV2 TP3 LK2 LK1 L1 VC1 TP12 TP13 VC5 TP14 TP5 TP6 VC3 VC2 TP1 FL2 FL1 Figure 7: Transmitter PCB Layout Page A1 - 18 TM 1184 Issue 1 AL1 (May 1997) Transmitter Alignment - Initial Settings 44. Refer to Figure 7. Set the variable components and links as follows:

VC1 VC2 VC3 VC4 VC5

- Anywhere.

- Half Meshed.

- Fully Un-meshed.

- Fully Un-meshed.

25% Meshed. FL1 and FL2 - Adjusters standing proud by 2mm. RV1 RV2 RV3 RV4

- Fully Anti-clockwise.

- Mid Position (15 turns from either end).

- Anywhere

- Mid Position LK1

- Position 2-3 (Normal Version). Position 1-2 (FTZ Version). LK2

- Position 1-2 (Bands 1 and 2). Position 2-3 (Band 3). LK3

- Position 2-3 (Normal Operation). Position 1-2 (Invert Data Sense). 45. Set up the test equipment as follows:

a) b) c) d) e) f) Disconnect the external audio input from SK1 on the Transmitter PCB. Connect the absorption wattmeter or power meter to the antenna socket using a lead no longer than 300mm. Connect the modulation meter and frequency counter to the attenuated output. Connect the power supply to SK3. Connect the audio signal generator to Serial Encoder SK1. Connect the serial port of your PC to SK1 (FCC 68) of the Encoder PCB using the P910 or P911 cable. If using Windows 95, run Hyper-Terminal; if using Windows 3.1, run Terminal.Exe. Configure your serial port as follows: 9600 Baud, 8 Data bits, 2 Stop bits, no Parity bit, Flow Control = Hardware. g) Connect the external power supply to SK3 of the Serial Encoder. TM 1184 Issue 1 AL1 (May 1997) Page A1 - 19 RPE 673 h) Power up the Serial Encoder, wait 3 seconds and, within a further 10 seconds, press <Enter> on the Terminal keyboard; the Set-up / Test Menu should appear on the VDU (see Figure 8). j) Select (T)est Menu. NOTE:

The Transmitter Tests are used to key the Transmitter during alignment, Full Test is for factory use only. T - (T)ransmitter Tests F - (F)ull Test Q - (Q)uit Set-up / Test Menu

T - (T)est Menu S - (S)et-up Menu Q - (Q)uit TAG 10827-1 Transmitter Test Menu

M - Key up Transmitter - (M)arking S - Key up Transmitter - (S)pacing P - Key up Transmitter - (P)reamble A - Key up Transmitter - (A)nalogue Q - (Q)uit Figure 8: Test Menu Options Setting up the Phase Lock Loop 46. Set up the Phase Lock Loop as follows:

a) b) Connect the oscilloscope to TP3. Adjust the slug of L1 to give 5V 0.2V DC at TP3. Transmitter Alignment 47. To align the Transmitter carry out the following procedure:

a) b) c) Connect the oscilloscope to TP7. Adjust RV3 to give 0V 50mV DC at TP7. Key up the Transmitter by selecting (A)nalogue. Page A1 - 20 TM 1184 Issue 1 AL1 (May 1997) d) On FL1 and FL2 turn the four adjusters turn at a time until the power meter indicates or the power supply current increases. e) f) g) If no power appears slightly adjust VC2 or VC3 and repeat (d). Tune the four adjusters of FL1 and FL2 for maximum power. Tune VC1, VC2 and VC3 for maximum power and then RV1 to give a power meter reading of 2.5W. h) Re-adjust VC1, VC2 and VC3 for maximum power then RV1 for 2.5W 0.2W. Setting Data Deviation and Centre Frequency 48. To set the Data Deviation and Centre Frequency carry out the following procedure:

a) b) c) d) e) f) Select (M)arking (continuous 1's) from the Transmitter Test Menu. Measure the output frequency to the nearest 10Hz. Select (S)pacing (continuous 0's) from the Transmitter Test Menu and again measure the output frequency to the nearest 10Hz. Adjust RV2 as necessary until the measurement at (b) differs from the measurement at (a) by the amount given in the TOTAL DEVIATION column of Table 5 (within the specified tolerance). Using a plastic trimming tool adjust VC5 until the mean of the two frequencies measured at (a) and (b) is within 100Hz of the specified centre frequency of the Transmitter. Table 5: Data Deviation CHANNEL SPACING DEVIATION kHz TOTAL DEVIATION TOLERANCE kHz 25 20 12.5 10 4.5 3.6 2.25 1.8 kHz 9 7.2 4.5 3.6 200Hz 200Hz 100Hz 100Hz Repeat sub-paragraphs (a) to (d) as necessary. Select (A)nalogue from the Transmitter Test Menu. Adjust RV3 to give the specified centre frequency of the Transmitter (to a tolerance of 100Hz). TM 1184 Issue 1 AL1 (May 1997) Page A1 - 21 RPE 673 Setting Analogue Deviation 49. To set the Analogue Deviation carry out the following procedure:

a) b) c) d) e) f) g) Select (A)nalogue from the Transmitter Test Menu. Set the audio generator output to 1.25kHz at a level of -13dBm (approximately 11.5mV peak-to-peak as measured on the oscilloscope). Monitor the deviation on the modulation meter. Adjust RV1 on the Encoder PCB fully clockwise. Refer to Table 6(a) and adjust the generator output level to give a deviation corresponding to the channel spacing. Increase the signal generator output level by 20dB and adjust RV4 to give a deviation corresponding to that given in Table 6(b) (this should be the larger of the Peak + or Peak - readings on the modulation meter). Table 6: Analogue Deviation CHANNEL SPACING kHz 25 20 12.5 10 DEVIATION DEVIATION DEVIATION DEVIATION

(a) kHz 3 2.4 1.5 1.2

(b) kHz 4.5 3.6 2.25 1.80

(c) kHz 5 4 2.5 2

(d) kHz 4.9 3.9 2.4 1.9 Reduce the signal generator level by 20dB and re-adjust its output level to give a deviation corresponding to that given in Table 6(a). Increase the signal generator level by 20dB and re-adjust RV4 to give a deviation corresponding to that given in Table 6(b). Vary the signal generator frequency between 300Hz and 2.5kHz and check that the deviation does not exceed that given in Table 6(c). If it does, tune to the frequency that gives the maximum deviation and adjust RV4 to give a deviation corresponding to that given in Table 6(d) (this should be the larger of the Peak + or Peak - readings on the modulation meter). h) Adjust RV1 on the Encoder PCB as necessary to compensate for the output level provided by the external audio source at the customers premises. j) Remove the signal generator. Page A1 - 22 TM 1184 Issue 1 AL1 (May 1997) FAULT FINDING 50. Specific fault finding information is not provided. For Transmitter test points, together with expected signals, refer to Section 5. NOTE: When the Serial Encoder is fitted with MEP firmware, it can be tested the Developers Pack D3NA). using CITEST.EXE

(supplied with ANTENNA CUTTING 51. Refer to Section 5. 52. SPARE PARTS LIST NOTE:

For General Spares and Transmitter PCB components, refer Section 6. to ITEM / CIRCUIT REFERENCE DESCRIPTION PART No. IC2 IC2 ENCODER PCB FIRMWARE RPE 671 /673 + ESPA FIRMWARE RPE 671 /673 + MEP 0201-0654 0501-0175 0501-0179 TM 1184 Issue 1 AL1 (May 1997) Page A1 - 23 RPE 673 Figure 9: Serial Encoder Interconnection Diagram Page A1 - 24 TM 1184 Issue 1 AL1 (May 1997)