52-7350UE5 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 ……………………………… ………+13.6VD.C. nominal(+10.8 to +15.6V ) TEMPERATURE RANGE STORAGE ……………………………… ……….80℃ maximum -40℃ min. 25℃ nominal OPERATING …………………………… ……….60℃ maximum -20℃ min. ANTENNA IMPEDANCE ……………………… ………. ..50Ω FREQUENCY CONTROL ……………………… …………. ..PLL SYNTHESISER FREQUENCIES OF OPERATION …………… ………….each band 10MHZ,from 400-510MHZ FREQUENCY TOLERANCE AND STABILITY …………± 1 .5PPM HIGH HUMIDITY ……………………………… ………….90﹪ CHANNEL CAPABILITY ……………………… ………….
BNC R R_LED(ALM) Y_LED(WA) G_LED(RX) Y_LED(TX) DB-26 . RESET PIN NO.
3.
PLL Synthesizer The PLL synthesizer circuit is common to both the transmitter and receiver, The synthesizer comprises: TCXO 8V 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 207, 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 about 5W . 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 J903 ) 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 VC2 to make the transmit power 5W and make sure the current less than 1300 mA. 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.
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 5 W. 3. Switch the data radio ON. 4. Inject a 106mVrms SINE wave signal at a frequency of 1000Hz into pin 1 of J903, 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 0 8 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 0 5.59 0 5.05 5 5.28 0 5.63 0 4.43 4.08 4.43 0 4.43 5 5.63 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 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 IC2 13.6 0 8 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.
9.PARTS LIST 7350- UE5/ 0808U_2.
7350- UE5/ 0808U_2. SCH Bi l l Of Mat er i al s Sept ember Revi sed: Sept ember Revi si on: 7, 2009 14: 30: 48 I t em Quant i t y Ref er ence Par t ______________________________________________________________ 11 7 C30, C31, C32, C115, C122, C308, C524 100P 12 1 C33 47U/ 16V/ EC/ SMT 13 1 C34 100U/ 16V/ EC/ SMT 14 1 C35 4.
7350- UE5/ 0808U_2. SCH Bi l l Of Mat er i al s Sept ember Revi sed: Sept ember Revi si on: 7, 2009 14: 30: 48 I t em Quant i t y Ref er ence Par t ______________________________________________________________ 27 4 C208, C213, C230, C314 3P 28 2 C210, C233 10P 29 3 C211, C305, C306 7P 30 1 C222 12P 31 6 C242, C300, C301, C309, C324, 220P C325 32 1 C303 9P 33 2 C304, C321 8P 34 1 CF1 CFU455E 35 3 D1, D5, D103 RLZ5. 6B 36 4 D2, D3, D101, D202 RLS4148 37 1 D4 RLZ4.
7350- UE5/ 0808U_2.
7350- UE5/ 0808U_2. SCH Bi l l Of Mat er i al s Sept ember Revi sed: Sept ember Revi si on: 7, 2009 14: 30: 48 I t em Quant i t y Ref er ence Par t ______________________________________________________________ 58 3 L201, L203, L303 27NH 59 1 L202 15NH 60 1 L204 0. 45*1. 5*6T 61 2 L205, L206 5. 6NH/ 0603 62 1 L208 0. 4*3*9T 63 1 L210 0. 65*1. 1*4T 64 1 L212 0. 45*1. 5*5T 65 2 L213, L214 0. 65*1. 45*4T 66 1 L215 2.
7350- UE5/ 0808U_2.
7350- UE5/ 0808U_2.
7350- UE5/ 0808U_2. SCH Bi l l Of Mat er i al s Sept ember Revi sed: Sept ember Revi si on: 7, 2009 14: 30: 48 I t em Quant i t y Ref er ence Par t ______________________________________________________________ 104 3 R116, R211, R213 22R 105 2 R203, R218 27K 106 1 R206 1. 5K 107 1 R207 220R 108 1 R210 3K3 109 1 R214 22R/ 0805 110 2 R220, R313 56R 111 1 R230 0. 1R/ 0.
7350- UE5/ 0808U_2. SCH Bi l l Of Mat er i al s Sept ember Revi sed: Sept ember Revi si on: 7, 2009 14: 30: 48 I t em Quant i t y Ref er ence Par t ______________________________________________________________ 120 1 RP1 10K*4 121 2 RV501, RV502 10KB SMT 122 1 T2 0766 123 1 VC1 20PVC/ SMT 124 1 VC2 5PVC/ DI P 125 1 VC3 5PVC/ SMT 126 1 VC4 10PVC/ SMT 127 1 VR1 100KB SMT 128 1 VR101 47KB/ SMT 129 1 X1 12. 8MHZ TCXO/ SMT 130 1 X2 3. 58MHZ 3X9 131 1 X101 20.
8. PROGRAMMER INSTRUCTION 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.
