7085-UE5 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 ……………………………… ………+13.8VD.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 SWITCH Filter 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.
9.
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 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- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 29 1 C206 6P 30 4 C208, C213, C230, C314 3P 31 2 C210, C233 10P 32 3 C211, C305, C306 7P 33 1 C222 27P 34 3 L207, R215, C240 NU 35 1 C243 104P/ 0805 36 9 R60, R61, C248, R526, R527, R532, R533, R534, R546 47K 37 5 C300, C301, C309, C324, C325 220P 38 1 C302 12P 39
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 46 1 D102 1SS226 47 1 D201 1SS314 48 1 D203 PTZ5.
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 63 1 J 101 BNC 64 1 L101 12NH 65 1 L102 56NH 66 1 L103 2. 2UH/ BEAD 67 3 L201, L203, L303 27NH 68 1 L202 15NH 69 1 L204 0. 45*1. 5*6T 70 2 L205, L206 5. 6NH/ 0603 71 1 L208 0. 4*3*9T 72 1 L210 0. 65*1. 1*4T 73 1 L212 0. 45*1. 5*5T 74 2 L213, L214 0. 65*1.
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 80 2 Q2, Q14 BCW68G 81 8 Q4, Q9, Q10, Q11, Q15, Q201, Q202, Q301 BC847B 82 2 Q7, Q103 DTC114EK 83 1 Q101 2SC4226 84 6 Q102, Q204, Q205, Q302, Q304, 2SC5226 Q305 85 1 Q104 MMBTH10 86 1 Q203 DTA123J K 87 1 Q206 BFG35 88 1 Q207 2SK2595 89 10 90 8 R3, R47, R118, R516, R
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 95 6 R10, R19, R101, R222, R315, R316 100R 96 1 R13 3K 97 2 R14, R15 6K8 98 2 R16, R111 33K 99 2 R23, R304 150R 100 5 R24, R41, R45, R107, R307 4K7 101 1 R29 12K 102 7 R40, R46, R51, R52, R202, R223, R317 1K 103 5 R48, R49, R117, R204, R216 470R 104 2 R53, R102 1M
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 111 2 R115, R217 470K 112 3 R116, R211, R213 22R 113 1 R203 27K 114 1 R206 1. 5K 115 1 R207 220R 116 1 R210 3K3 117 1 R214 22R/ 0805 118 1 R218 62K 119 2 R226, R313 56R 120 1 R230 0. 1R/ 0.
52- 7085UE4 Revi sed: November 28, 2008 Revi si on: November 28, 2008 17: 09: 53 Bi l l Of Mat er i al s I t em Quant i t y Ref er ence Par t _____________________________________________________________ 128 1 RP1 10K*4 129 2 RV501, RV502 10KB SMT 130 1 SW1 CH SW 131 1 T2 0766 132 1 VC1 20PVC 133 1 VC2 10PVC 134 1 VR1 100KB SMT 135 1 VR101 47KB/ SMT 136 1 X1 12. 8MHZ TCXO/ SMT 137 1 X2 3. 58MHZ 3X9 138 1 X101 20.
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.
TOP LAYER PCB LAYOUT BOTTOM LAYER PCB LAYOUT PAGE35
CAM350 V 5.
CAM350 V 5.
8 7 6 5 4 3 2 CASCODE DRIVER 12.8MHZ L.P.F LOOP FILTER R IC1 D304 D301 Q2,Q4 V Q207 Q304 2SC3356 VCO OSC ANT BNC TX SW RF OUT X1 TX/RX SW VCO PLL CONTROL TCXO SMT PA TRANSISTOR 1 2 D201 1 CONT L212 Q204,Q205,Q206 3 D303 D FIN LD D +13.6V 5V TXB+ TCXO MOD. 1SV229 1SV229 2 Q202 3 Q201 Q6 VCO 1 2 2 1 2 1 2 1 D205 3 Q305 2SC3356 Q203 1 REG 3 3 3V TXEN1 8V VP TX SW MOD INPUT Q14 +13.
7 6 5 Q301 BC847B C309 R315 102P C312 102P 2K7 220P 100P R306 33R L300 1UH/BEAD R302 5K6 L304 D301 1SV229 1SV229 27NH C305 C207 102P C203 C204 102P 18P C208 R205 10K Q203 4K7 R206 1.5K C206 6P 2SC5226 L204 C210 10P R304 DTA123JK C321 8P 20PVC R210 5V R312 3K3 R211 22R RXB+ R316 C324 220P Q305 2SC5226 100R 2P C239 470P C325 220P C323 R313 15P 56R L205 C223 5.6NH/0603 22P Q206 BFG35 D206 3P Q207 2SK2595 L206 C222 0.65*1.
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.
