7085-UE2 UHF DATA TRANSCEIVERS PLL SYNTHESIZED (EEPROM) Service Manual HEC HERMES ELECTRONI CS CO. , LTD.
TABLE OF CONTENS 1. SPECIFICATION ……………………………… …………………………………. .2 2. CONNECTIONS AND OPERATION …………………………………………3 3. CIRCUIT DESCRIPTION ………………… …………………………………..4-12 4. PERFORMANCE TEST AND ALIGNMENT ……………………………1 2 5. TEST EQUIPMENT CONFIGURATION …………………………………1 3 6. TRANSMITTER PERFORMANCE TEST ……………. ……………………….14-16 7. TROUBLESHOOTING ……………………… …………………………………..17-19 9. PARTS LIST ………………………………… …………………………………..20-28 8. PROGRAMMER INSTRUCTION …….. ……………………………………….29-34 10.
1. SPECIFICATION GENERAL SPECIFICATIONS POWER SOURCE ……………………………… ………+12VD.C. nominal(+10.8 to +15.6V ) TEMPERATURE RANGE STORAGE ……………………………… ……….80℃ maximum -40℃ min. 25℃ nominal OPERATING …………………………… ……….70℃ maximum -20℃ min. ANTENNA IMPEDANCE ……………………… ………...50Ω FREQUENCY CONTROL ……………………… …………...PLL SYNTHESISER FREQUENCIES OF OPERATION …………… …………..450-470MHZ FREQUENCY TOLERANCE AND STABILITY …………±1.5PPM HIGH HUMIDITY ……………………………… ………….90﹪ CHANNEL CAPABILITY ……………………… ………….
EXTERNAL CONNECTIONS 1- 50Ω BNC SOCKET 2- 9 WAY 〝 D 〞TYPE PLUG(J501) 2. CONNECTIONS D-TYPE PIN J501-1 J501-2 J501-3 J501-4 J501-5 J501-6 J501-7 J501-8 J501-9 AND OPERATION INTERCONNECTIONS FUNCTION DATA_IN DATA_OUT PTT GND B+ CDS NC PGM_DATA PGM_ENB TYPE ANALOGUE ANALOGUE INPUT GND V+ OUTPUT RANGE 106mV 250~350mV 0V/+5V 0V +13.
3.
PLL Synthesizer The PLL synthesizer circuit is common to both the transmitter and receiver, The synthesizer comprises: TCXO DC Regulator Loop Filter Data IC1 PLL Charge Pump TX OR RX VCO RF Out 12.8 MHZ TCXO X1 is VCTCXO, which provide stable oscillator of 12.8 MHZ to PLL IC. Frequency adjustment is provided by VR1. .Voltage controlled oscillator module(VCO) The module produces carrier frequencies during transmit and local oscillator frequencies During receive.
The module also has Rx and TX powerline filters. RX and TX power line filters Transistor Q301 is configured as a 5v power supply ripple filter. The filter reduces the noise on the carrier and local oscillator signals. VCO The V CO comprises Q302, Coil L304, and varactor D301 D304 and is configured as a Colpits oscillator. D301 D304 produces a change in frequency with a change in DC voltage and is controlled by the tuning voltage signal present at the cathode. The local oscillator programmable dividers.
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 8V tuning voltage signal. The signal is filtered by the loop filter (R13,C15 and C20) 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 D201 is forward biases enabling the modulated RF signal from the VCO to pass to the buffer/pre-amplifier Q204 and associated components. The output signal is passed from Q204 to Q205 via a matching network consisting of Inductor L201 and C208. PA module The signal is then amplified for transmission by Q207, which is a power amplifier module.
Receiver The receiver comprises: Rx VCO ANTENNA SAW FILTER& Amp First Mixer IF Filter SWITCH IF Amp Second Mixer Local Oscillator Data Out Audio Filter IF Filter FM LimiterDiscnminator Squelch Circuit PAGE9
Antenna Switch In receive, the diode D205 are reverse biased. L212 is now in circuit, passing the signal from the antenna to the SAW filter of F101. SAW FILTER The receiver signal is routed to pin 4 of the F101. It passes through the band pass filter . The input signal is coupled to the base of Q101 which serves as an RF amplifier. The output of Q101 is then coupled to the first mixer. First Mixer Q102, 2-pole crystal filters XF1 and coils L103 and C120 form the First Mixer and First IF Filter.
Crystal X101,connected to pin 1 of IC101, determines the second local oscillator frequency. In this case the crystal has a frequency of 20.945MHz. 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. The output of CF1is passed via pin 5 to a high gain IF amplifier coupled to the adjustable quadrature detector T2.
Programming Mode The programming mode allows the user to retrieve or program TX /RX frequencies, when pin 9 of J1 is set to ground. Programming mode will Inhibit , Serial communications can then be made in order to read/program the on- board EEPROM ( IC5 )which contains radio- specific data. EEPROM Relevant channel information, such as Rx/ Tx frequencies, is stored in the EEPROM( IC5) which is a 93C46. This information may be programmed and erased via the D- type socket.
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 2 to 3W . 3. Set the PTT switch to OFF . Peak Deviation 1. Connect the oscilloscope to the output of the modulation meter. 2. Set the AF signal generator to 1000 Hz at 106mV and connect to DATA _IN Line ( pin 1 of J1 ) 3.
Transmitter Alignment Automatic Power Adjustment Transmit periods longer than 3 minutes are to be avoided. 1. Switch to data radio to TX. 2. make the transmit power between 2 to 3W. 3. Switch the data radio to transmitter OFF. Frequency accuracy 1. Whilst transmitting, measure the transmit frequency using the RF frequency counter. 2. Adjust VR1 so that frequency is as close as possible to the exact required transmit frequency. Ideally it should be within 100 Hz at room temperature.
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 2 W. 3. Switch the data radio ON. 4. Inject a 106mVrms SINE wave signal at a frequency of 1000Hz into pin 1 of J1, Set the data radio to TX Observe the oscilloscope display to check that the 1000Hz tone is a sine wave by tuning VR201and set deviation is 3.5KHZ. 5.
7. TROUBLESHOOTING The section includes voltage which should assist the engineer to isolate and repair the 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: 465MHZ,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 2.35 2.39 1.63 4.93 0 0 4.92 3.52 0 0 0 4.9 0 0 3.76 0 IC2 13.6 8.1 8.1 6.86 0 8.1 8.1 0 IC3 0 5 0 0 0 5 4.96 0 0 0 0 0 0 0 0 0 5 0 5 5 0 0 5 5 5 2.07 2.59 5 IC4 5 5 0 5 5 RECEIVER IC5 IC101 IC201 0 5.59 0 0 5.05 0 5 5.28 0 0 5.63 0 0 4.43 0 4.08 4.43 0 0 4.43 0 5 5.63 0 2.15 0.78 1.59 0.58 5.21 0 0 1.
Integrated Circuits PIN 1 2 3 4 5 IC1 2.35 2.39 1.65 4.93 0 IC2 13.6 8.1 8.1 6.86 0 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0 4.92 3.52 0 0 0 4.91 0 0 3.76 0 8.1 8.1 0 TRANSMIT IC3 IC4 IC5 0 0.58 0 5 0.58 0 0 0 5 0 0.34 0 0 5 0 0.34 4.92 0 0 0 0 0 0 0 0 0 4.98 4.95 4.98 0 0 0 4.98 4.98 4.98 2.07 2.59 5 4.08 0 5 IC101 0 0 0 0 0 IC201 1.16 0 0 0 2.43 0 0 0 0 0 0 0 0 0 0 0 5.03 2.48 1.
6. PARTS LIST 52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 1 19 C1, C40, C47, C48, C49, C51, 470P C52, C106, C201, C216, C217, C218, C221, C225, C227, C235, C244, C247, C250 2 11 C2, C108, C317, C550, C551, 1U/ Y5V 0805 C552, C553, C554, C555, C556, C558 3 5 4 16 5 1 C9 475P/ 0805 6 1 C11 105P 25V/ 1206 7 16 8 1 C15 0.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 12 1 C21 103P 13 7 C30, C31, C32, C115, C122, C308, C524 100P 14 1 C33 47U/ 16V/ EC/ SMT 15 1 C34 100U/ 16V/ EC/ SMT 16 1 C35 4.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 28 1 C205 335P/ 1206 29 1 C206 6P 30 4 C208, C213, C228, C314 3P 31 2 C210, C233 10P 32 4 C211, C230, C305, C306 7P 33 1 C222 12P 34 2 C243, C248 104P/ 0805 35 1 C246 223P 36 5 C300, C301, C309, C324, C325 220P 37 1 C303 9P 38 2 C304, C321 8P 39 1 CF1 CFU455E 40 3 D1, D5, D103 RLZ5.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 45 1 D201 1SS314 46 1 D203 PTZ3. 9A 47 2 D205, D303 HVU131 48 1 D206 RLZ5.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 62 1 L102 56NH 63 1 L103 2. 2UH/ BEAD 64 3 L201, L203, L303 27NH 65 1 L202 15NH 66 3 L204, L212, L213 0. 45*1. 5*5T 67 2 L205, L206 6. 8NH/ 0603 68 1 L207 14UH 69 2 L208, L214 0. 45*1. 5*6T 70 1 L210 0. 65*1.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 78 1 Q101 2SC4226 79 6 Q102, Q204, Q205, Q302, Q304, 2SC5226 Q305 80 1 Q104 MMBTH10 81 1 Q203 DTA123J K 82 1 Q206 BFR96TS 83 1 Q207 MRF555 84 9 R1, R17, R50, R201, R205, R308, R518, R521, R524 10K 85 8 R3, R47, R118, R516, R523, R525, R528, R531 100K 86 1 R4 0R 87 2 R5, R11 910R 88 6 R8, R20, R30, R103, R221, R318 2K2 89
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 92 2 R14, R15 6K8 93 2 R16, R111 33K 94 3 R23, R225, R304 150R 95 5 R24, R41, R45, R107, R307 4K7 96 1 R29 12K 97 7 R40, R46, R51, R52, R202, R223, R317 1K 98 5 R48, R49, R117, R204, R216 470R 99 2 R53, R102 1M 100 8 R60, R61, R526, R527, R532, R533, R534, R546 47K 101 1 R104 220K 102 3 R105, R208, R220 22K 103 1 R106
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 107 2 R115, R217 470K 108 3 R116, R211, R213 22R 109 1 R203 27K 110 1 R206 1.
52- 7085UE2 Revi si on: Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 124 1 T2 0766 125 1 VC1 20PVC 126 1 VR1 100KB SMT 127 1 VR101 47KB/ SMT 128 1 VR201 10KB/ SMT 129 1 X1 12. 8MHZ TCXO/ SMT 130 1 X2 3. 58MHZ 3X9 131 1 X101 20. 945MHZ UM1 132 1 XF1 21M08B 128 2 SCREW M2X4 F. E.
Wel come t o PC Pr ogr ammer . Pl ease Read t hi s f i l e, bef or e you f i r st use t he sof t war e. TABLE OF CONTENTS 1. 2. 3. 4. 5. Br i ef i nt r oduct i on Bef or e I nst al l i ng I nst al l PC Pr ogr ammer I NSTRUCTI ONS UnI nst al l PC Pr ogr ammer 1. Br i ef i nt r oduct i on Wel come t o PC Pr ogr ammer . Thi s pr ogr am i s desi gned t o be used wi t h t he I nt er f ace Adapt er . The f ol l owi ng equi pment wi l l be needed t o pr ogr am t he Devi ce: A.
4. I NSTRUCTI ONS 4. 1 Connect i on 4. 2 St ar t up PC Pr ogr ammer 4. 3 Edi t Conf i gur at i on 4. 3. 1 Open/ Recal l / Upl oad Conf i gur at i on f i l e 4. 3. 2 Edi t Channel dat a 4. 3. 3 Set Opt i on i t em 4. 3. 4 ( Bl ock) Cut / Copy/ Del et e/ Past e 4. 3. 5 Aut o- Fr equency edi t 4. 3. 6 Save a Conf i gur at i on t o di sk 4. 3. 7 Downl oad Conf i gur at i on t o devi ce 4. 3. 8 Pr i nt a Conf i gur at i on 4. 4 Exi t PC Pr ogr ammer 4. 1 Connect i on 1.
4. 2 St ar t up PC Pr ogr ammer 1. Sel ect ' St ar t ' , choose ' Pr ogr ams' , cl i ck on t he ' *** Ser i al PC Pr ogr ammer ' pr ogr am. 2. When HD Ser i al PC Pr ogr ammer i s st ar t ed, a mai n f or m wi l l be shown af t er a gr eet i ng f or m. 3. Ther e has a menu bar at t he t op of t he mai n f or m, and a message box at t he bot t om.
NOTE: The pr ogr am i s menu dr i ven f or al l per t i nent commands. Al l t he commands can be accessed by ei t her key boar d or t he l ef t mouse but t on. Access keys mai nl y used ar e: ' Tab' or ' Ar r ow' t o move f ocus( or cur sor ) ' Ent er ' t o act i ve a f ocused command 4. 3 Edi t Conf i gur at i on 4. 3.
2) To Edi t Syst em Opt i on, Pop up i nput wi ndow f or Syst em Opt i on, cl i ck "SYSTEM" i n t he ' OPTI ON' menu. 3) To Edi t Advanced Opt i on, Pop up i nput wi ndow f or Advanced Opt i on, cl i ck "ADVANCED OPTI ON" i n t he ' OPTI ON' menu. 4Use comput er ' s cur sor keys, Tab key, Ent er key, ar r ow key or mouse t o r enew t he Opt i on I t em. 5) Cl i ck ' OK' but t on on t he i nput wi ndow t o accept t he change or ' CANCEL' t o not change, and r et ur n back t o Conf i gur at i on Wi ndow. 4.
4. 3. 6 Save a Conf i gur at i on t o di sk 1) Di f f er ent conf i gur at i on can be saved t o di sk. 2) Cl i ck on ' SAVE' i t em i n ' FI LE' Menu wi l l over wr i t e an exi st i ng conf i gur at i on f i l e on your di sk by cur r ent conf i gur at i on. 3) Sel ect ' SAVE AS' f r om ' FI LE' Menu wi l l save t he cur r ent conf i gur at i on by a name as you pr ef er . 4. 3.
Federal Communication Commission Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
FEDERAL COMMUNICATIONS COMMISSION This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
