AES Corporation does not have a “user’s manual” for this device. The only manual that is available is a “service manual” because of the intended use and sale of this product. This service manual is provided below.
A E S 7085-VE VHF SYNTHESISED DATA TRANSCEIVER Service Manual
40-7085-VE-SM Document Rev A1 10/2003 AES Corporation 285 Newbury Street. Peabody, Massachusetts 01960-1315 Tel (978) 535-7310.
TABLE OF CONTENS 1. SPECIFICATION 2 2. CONNECTIONS AND OPERATION 3 3. CIRCUIT DESCRIPTION 4-12 4. PERFORMANCE TEST AND ALIGNMENT 12 5. TEST EQUIPMENT CONFIGURATION 13 6. TRANSMITTER PERFORMANCE TEST 14-16 7. TROUBLESHOOTING 17-19 8. PROGRAMMER INSTRUCTION 20 9. PARTS LIST 22-35 10. PRINT CIRCUIT BOARD LAYOUT 36-43 11. PARTS ASSEMBLY 44-49 12. BLOCK DIAGRAM 50 13.
1. SPECIFICATION GENERAL SPECIFICATIONS POWER SOURCE TEMPERATURE RANGE STORAGE OPERATING ANTENNA IMPEDANCE FREQUENCY CONTROL FREQUENCIES OF OPERATION FREQUENCY TOLERANCE AND STABILITY HIGH HUMIDITY CHANNEL CAPABILITY NOMINAL DIMENSIONS WEIGHT +12VD.C. nominal (+10.8 to +15.6V ) 80ºC maximum -40ºC min. 25ºC nominal 60ºC maximum -20ºC min. 50Ω PLL SYNTHESISER 140MHZ - 174MHZ ±1.
2. CONNECTIONS EXTERNAL AND OPERATION CONNECTIONS 1- 50Ω BNC SOCKET 2- 9 PIN “D” TYPE PLUG (J501) D-TYPE PIN J501-1 J501-2 J501-3 J501-4 J501-5 J501-6 J501-7 J501-8 J501-9 INTERCONNECTIONS FUNCTION DATA_IN DATA_OUT PTT GND B+ CDS NC PGM_DATA PGM_ENB TYPE ANALOGUE ANALOGUE INPUT GND V+ OUTPUT NC INPUT INPUT RANGE 100Mv-2.5VP-P 1VP-P 0V/+5V 0V +13.
3.
PLL Synthesizer The PLL synthesizer circuit is common to both the transmitter and receiver. The synthesizer comprises: TCXO DC-DC Converter Loop Filter Data IC1 PLL Charge Pump TX OR RX VCO RF Out Voltage controlled oscillator module (VCO) The module contains two VCOs. One for producing carrier frequencies during transmit (TX VCO) and one for producing the local oscillator frequency during receive (RX VCO). The module also has RX and TX power line filters. Output is for PLL IC(IC1) Fin.
RX and TX power line filters Transistor Q308 is configured as a 5v power supply ripple filter. The filter reduces the noise on the carrier and local oscillator signals. RX VCO The RX VCO comprises JFET Q301, coil L301 , and varactor D301 and is configured as a Colpitts Oscillator . D301 produces a change in frequency with a change in DC voltage and is controlled by The tuning voltage signal present at the cathode.
Charge Pump and Loop Filter Transistors Q2, Q4, Q10, and associated resistors and capacitors form the charge pump and loop Filter. The phase detector output from IC1 pins 15 and 16 are combined by the charge pump to produce a 0 to 15V tuning voltage signal. The signal is filtered by the loop filter (R13, C16 and C17) to remove any residual reference Frequency harmonics from the signal. After filtering the signal is applied to the voltage controlled Oscillator module.
Buffer When the radio is in transmit mode the diode D2 is forward biases enabling the modulated RF signal from the VCO to pass to the buffer/pre-amplifier Q21 and Q22 and associated components. The output signal is passed from Q22 to IC5 via a matching network consisting of Inductor L7 and C73. PA module The signal is then amplified for transmission by IC5, which is a power amplifier module.
Receiver The receiver comprises: Rx VCO ANTENNA Front End Amp First Mixer IF Filter SWITCH IF Amp Second Mixer Local Oscillator Data Out Audio Filter IF Filter FM LimiterDiscriminator Squelch Circuit PAGE 9
Antenna Switch In receive, the diode D5 and D6 are reverse biased. L11 is now in circuit, passing the signal from the antenna to the front end without signal loss. Front End The receiver signal is routed to pin 1 of the RF Front End module. It passes through the band pass filter consisting of C800 to C808/L800 to L803. Diode D800 serves as protection from RF overload from nearby transmitters. The input signal is coupled to the base of Q800, which serves as an RF amplifier.
Crystal X1, connected to pin 1 of IC6, determines the second local oscillator frequency. In this case the crystal has a frequency of 44.545MHz. The first IF signal is applied to the mixer and resultant frequency of 455KHz, is the difference between the IF signal and second local oscillator. The 455KHz IF signal is output from pin 3 and is applied to a 455KHz band-pass filter, CF1 (12.25 kHz channel spacing) or CF2 (6.25 kHz channel spacing).
Programming Mode The programming mode allows the user to retrieve or program TX/RX frequencies, HI/LO power Setting and channel spacing, when pin 9 of J501 is set to ground. Programming mode will Inhibit, Serial communications can then be made in order to read/program the on- board EEPROM ( IC502 )which contains radio- specific data. EEPROM Relevant channel information, such as RX / TX frequencies, is stored in the EEPROM (IC502) which is a 93C46.
5. TEST EQUIPMENT CONFIGURATION. RF Signal Generator Watt Meter with 20dB Attenuator Audio Generator Modulation Meter SINAD Meter OSCILLOSCOPE RADIO VOLT Meter Spectrum Analyzer DC Power Supply Frequency Counter 123.
6. TRANSMITTER PERFORMANCE TESTS Power Output 1. Set the power supply voltage to 13.8V DC and monitor the voltage during transmit. 2. Switch data radio TX and check and record the output power. The nominal output power is adjustable between 1 and 5W depending on the programming. 3. Set the PTT switch to OFF. Peak Deviation 1. 1. Connect the oscilloscope to the output of the modulation meter. 2. Set the AF signal generator to 100 Hz at 5Vpeak–to-peak and connect to DATA _IN Line (pin 1 of J501) 3.
Transmitter Alignment Automatic Power Adjustment Transmit periods longer than 3 minutes are to be avoided. 1. Switch to data radio to TX. 2. Adjust RV1 to give the appropriate transmit power. 3. Record the transmit power set. 4. Switch the data radio to transmitter OFF. Frequency accuracy 1. Whilst transmitting, measure the transmit frequency using the RF frequency counter. 2. On the TCXO PCB, adjust trimmer capacitor VC700 so that frequency is as close as possible to the exact required transmit frequency.
Modulation Deviation Adjustment 1. Connect a power meter, modulation meter and oscilloscope to radio. 2. The radio should be programmed to contain a channel with a frequency in the middle the band of interest with an RF power setting of 1 W. 3. Switch the data radio ON. 4. Inject a 1Vrms(3VP-P) SINE wave signal at a frequency of 100Hz into pin 1 of J501 5. Set the data radio to TX 6. Observe the oscilloscope display to check that the 100Hz tone is a square ware by tuning RV502. 7.
7. TROUBLESHOOTING This section includes voltages, which should assist the engineer to isolate and repair a fault. Voltage measurements should be made using a high-impedance voltmeter and the values given are with respect to ground. Careful alignment, using suitable test equipment, and quality interface cables should ensure that the radio meet their specified performance. Voltage Charts Measurement Condition: 162.8750MHZ, 13.8V supply, RX Carrier Present. Transistors. Ref. No.
Integrated Circuits Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 IC1 1.92 1.98 0.48 4.14 0 0 4.12 2.87 0 0 0 3.98 0 0 3.67 0 IC2 6.82 0 5.02 IC5 0 0 0 13.8 0 RECEIVER IC6 IC8 4.25 0 3.65 0 3.53 0 4.38 0 3.34 0 3.32 0 3.33 4.41 1.64 0.62 2.97 1.33 3.20 3.22 0 1.71 IC501 0 5.05 0 0 0 5.05 4.58 0 0 0 1.07 0.05 0.17 0 0 0 5.04 0 0 4.97 4.98 0 0 0 0 1.6 2.1 5.04 IC502 0 0 5.05 0 0 0.97 0 5.05 IC504 2.49 2.48 2.26 5.05 2.27 2.48 2.49 2.48 2.48 2.43 0 2.24 2.49 2.
Integrated Circuits PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 IC1 1.92 1.98 0.48 4.14 0 0 4.12 2.87 0 0 0 3.98 0 0 3.67 0 IC2 6.82 0 5.02 IC5 0 4.49 5.56 13.8 1.78 TRANSMIT IC6 IC8 IC501 IC502 IC504 IC508 0 0 0 0 2.49 0.5 0 0 5.04 0 2.48 0.5 0 0 0 5.05 2.26 0 0 0 0 0 5.05 0.3 0 0 0 0 2.27 5.05 0 0 0.3 0.97 2.48 0 4.58 0 2.49 0 0 5.05 2.48 0 0 2.48 0 0 2.43 0 0 0 0 0 2.24 0 0 2.49 0 5.03 2.49 0 0 0 0 5.04 4.98 0 0 4.97 4.98 0 0 0 1.6 2.10 5.04 U4 3.7 0.17 0.11 0 0.
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9. PARTS LIST.
7085-VE Bill Of Materials July 22, 2003 Revised: Revision: 17:04:58 July 22, 2003 Page 1 Item Quantity Reference Part ____________________________________________________________________ 10 10 C17,C21,C31,C64,C142, C143,C148,C151,C536,C910 103P 11 20 C19,C42,C46,C58,C62,C67, 104P C81,C117,C144,C145,C146, C147,C324,C329,C503,C542, C544,C546,C557,C906 12 7 C24,C94,C98,C101,C113, C141,C302 15P 13 3 C26,C306,C315 2P 14 2 C28,C154 33U/6.3V/EC/SMT/B-CASE 15 1 C32 100U/6.
7085-VE Bill Of Materials Revised: July 22, 2003 Revision: July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 20 1 C70 3P 21 8 C71,C79,C80,C99,C303, C510,C804,C806 NU 22 10 23 1 C74 10U/16V/EC/SMT/B-CASE 24 1 C88 10P 25 1 C92 12P 26 2 C103,C119 82P 27 2 C107,C538 100U/16V/EC/SMT/D-CASE 28 3 C108,C504,C505 22P 29 4 C111,C801,C812,C822 39P 30 4 C112,C304,C305,C309 4P 31 2 C114,C817 56P 32 1
7085-VE Bill Of Materials Revised: July 22, 2003 Revision: July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 34 3 C135,C511,C903 220P 35 1 C150 47U/10V/EC/SMT/C-CASE 36 8 C160,C161,C162,C524,C802, 100P C808,C811,C818 37 1 C310 1P 38 1 C335 8P 39 1 C336 9P 40 2 C532,C533 47U/16V/EC/SMT/D-CASE 41 1 C537 10U/16V(T) B-CASE 42 1 C548 4.
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 45 1 C815 150P 46 1 C821 270P 47 2 C901,C904 105P/X7R 0805 48 1 C902 152P/X7R 49 1 C905 683P/X7R 0805 50 1 C907 820P 51 1 C908 152/X7R 52 1 C909 120P 53 1 C911 392P/X7R 54 1 C912 332P/X7R 55 1 CF1 CFW455E 56 1 CF2 CFW455HT 57 3 D2,D3,D12 1SS314 58 1 D4 1SS154 59 2 D5,
7085-VE Bill Of Materials Revised: July 22, 2003 Revision: July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 60 1 D7 1N4004 SMT 61 4 D8,D11,D501,D504 RLS4148 62 2 D13,D14 1SS181 63 3 D301,D302,D303 1SV215 64 1 D502 RLZ4.3B 65 1 D503 BAV99LT1 66 1 D505 RLZ6.2B 67 1 D506 RLZ16B 68 1 D507 RLZ3.
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 72 1 IC5 M67748H 73 1 IC6 MC3371 SMT 74 1 IC8 LRFMS-1L 75 1 IC501 PIC16C57/XT SMT 76 1 IC502 93C46 SMT 77 2 IC504,U901 TL064CD SMT 78 1 IC508 ELM7S32 79 1 J501 CONNECTOR DB9 80 1 J901 PCB JACK 6PIN 2.
7085-VE Bill Of Materials Revised: July 22, 2003 Revision: July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 86 2 L12,L15 0.45*2.3*7T CW SMT 87 2 L16,L18 45M 88 2 L19,L20 0.15UH TDK 89 1 L311 0.82UH TDK 90 2 L312,L313 MDS-0605U-3.5T 91 2 L501,L503 100UH SMT 92 1 L502 560UH SMT 93 7 L800,L801,L802,L803,L804, 0.45*1.
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 98 1 P305 5 99 1 P306 6 100 1 P307 7 101 3 Q2,Q6,Q502 A1037K 102 13 Q4,Q9,Q10,Q12,Q19,Q25, Q34,Q35,Q308,Q503,Q505, Q507,Q508 BC847A 103 5 Q8,Q16,Q17,Q21,Q22 2SC3838 104 2 Q11,Q15 DTA114EK 105 1 Q14 BCW68G 106 1 Q18 DTA123JK 107 2 Q23,Q506 2SB798 108 1 Q24 MMBTH10 109 4 Q31,Q32,Q3
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 111 2 Q301,Q302 MMBFJ310LT1 112 1 Q800 2SC3356 113 22 R1,R5,R11,R17,R25,R39, R41,R42,R46,R66,R71,R87, R92,R93,R101,R102,R103, R305,R308,R503,R521,R524 10K 114 8 R3,R20,R64,R502,R523, R525,R531,R903 100K 115 8 R4,R8,R26,R91,R94,R96, R98,R538 22K 116 2 R9,R541 3K9 117 7 R10,R19,R47,R48,R51,R89, R542
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 121 1 R16 33K 122 1 R18 91K 123 9 R24,R43,R61,R73,R81,R513, 4K7 R515,R543,R548 124 1 R27 10R 125 1 R28 5K6 126 16 R31,R32,R33,R35,R45,R49, R57,R75,R76,R84,R501, R504,R505,R552,R553,R902 1K 127 11 R34,R526,R527,R528,R532, 47K R533,R534,R537,R701,R702, R905 128 1 R37 6R8 129 3 R40,R52,R56 470K
7085-VE Revised: Revision: July 22, 2003 Item Quantity Reference Part ____________________________________________________________________ 133 5 R54,R55,R309,R517,R535 0R 134 3 R65,R554,R555 470R 135 1 R77 560K 136 1 R78 560R 137 1 R79 390R 138 4 R85,R86,R907,R908 82K 139 1 R97 56K 140 1 R104 2K4 141 2 R302,R306 47R 142 2 R303,R307 330R 143 1 R506 1M 144 2 R544,R545 680R 145 1 R800 820R 146 2 R801,R906 6K8 147 1 R802 3K3 PAGE 33
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 148 1 R803 2R2 149 1 R804 180R 150 1 R901 16K 151 1 R904 24K 152 2 R909,R910 75K 153 1 R911 20K 154 1 R912 220K 155 1 R913 200K 156 1 R914 130K 157 1 RP1 10K*4 SMT 158 2 RV1,RV2 47KB SMT 159 3 RV501,RV502,RV503 10KB SMT 160 1 RV700 100KB SMT 161 1 SW1 DIGITAL SW 16CH SMT
7085-VE Revised: Revision: Bill Of Materials July 22, 2003 July 22, 2003 17:04:58 Item Quantity Reference Part ____________________________________________________________________ 163 1 TP1 TP 164 1 TP2 VCO 165 1 U2 STRIP1 166 1 U4 LM358 SMT 167 1 U701 12.8MHZ TCXO/SMT 168 1 X1 44.545MHZ UM1 169 1 X501 3.58MHZ 3X9 170 2 XF1,XF2 45N15B UM1 168 1 COVER TOP 169 1 COVER BOTTOM 170 3 CRYSTAL WASHER UM1 TYPE 171 1 MAIN PCB 110mm*55mm*1.
