UHF DATA TRANSCEIVERS PLL SYNTHESIZED (EEPROM) Service Manual HERMES ELECTRONICS CO., LTD.
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 9.
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 … … … … … … … … … ..406-430MHZ,450-470MHZ FREQUENCY TOLERANCE AND STABILITY … … … … ±1.
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 VCO 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 The IC1 pin5 and associated resistors make VCO loopFilter . The charge pump output Produce a 0 to 5V tuning voltage signal. The signal is filtered by the loop filter (R14,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. DC REGULATOR The DC Regulator IC2, converts the +13.6 V to a 8V supply . This is used to provide the Tuning voltage for the VCO .
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. 2. Connect a power meter, modulation meter and oscilloscope to radio. 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. Q1 B 4.
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 1.25 1.22 5.47 2.99 1.24 0 2.21 2.1 0 0 0 2.99 2.99 2.99 0 0 IC2 13.6 8.0 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 0.66 1.03 5 IC4 5 5 0 5 5 RECEIVER IC5 IC101 IC201 0 5.51 0 0 4.93 0 5 5.24 0 0 5.59 0 0 4.38 0 4.08 4.37 0 0 4.38 0 5 5.08 0 2.23 0.74 3.71 0.93 5.21 0 0 1.
Integrated Circuits PIN 1 2 3 4 5 IC1 1.25 1.22 5.47 2.99 3.59 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0 2.21 2.1 0 0 0 2.99 2.99 2.99 0 0 IC2 13.6 8.0 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 0.66 1.03 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.
8.
52-7085UE5 Bill Of Materials Revised: June 4, 2015 Revision: June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 10 1 C20 333P/X7R 0805 11 6 C30,C31,C32,C45,C116, C523 47P 12 1 C33 47U/16V/EC/SMT 13 1 C34 100U/16V/EC/SMT 14 4 C43,C50,C120,C223 22P 15 1 C101 1P 16 2 C104,C252 1U/T 17 1 C105 104P/X7R 0603 18 2 C110,C247 223P/X7R 0603 19 1 C113 180P 20 4 C115,C122,C308,C524 100P 21 2 C123,C214 15P 22 4
52-7085UE5 Revised: Revision: June 4, 2015 Bill Of Materials June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 26 4 C210,C232,C233,C323 10P 27 3 C211,C305,C306 7P 28 1 C222 12P 29 5 C240,C300,C301,C309,C325 220P 30 1 C242 10U/T 31 1 C243 104P/X7R/0805 32 4 L217,C246,C253,C254 NU 33 1 C303 9P 34 1 C304 8P 35 1 CF1 CFU455E 36 2 D1,D103 RLZ5.6B 37 4 D2,D3,D101,D202 RLS4148 38 1 D4 RLZ4.
52-7085UE5 Bill Of Materials Revised: Revision: June 4, 2015 June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 43 1 D203 PTZ5.
52-7085UE5 Bill Of Materials Revised: Revision: June 4, 2015 June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 60 1 L102 39NH/0805 61 1 L103 2.2UH/BEAD 62 2 L201,L303 27NH 63 1 L202 15NH 64 1 L203 18NH 65 1 L204 0.45*1.5*6T 66 2 L205,L206 5.6NH/0603 67 1 L208 0.4*3*9T 68 1 L210 0.65*1.1*4T 69 1 L212 0.45*1.5*5T 70 2 L213,L214 0.65*1.45*4T 71 1 L215 2.
52-7085UE5 Revised: Revision: June 4, 2015 Bill Of Materials June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 77 2 Q7,Q103 DTC114EK 78 6 Q9,Q11,Q15,Q201,Q202, Q301 BC847B 79 1 Q14 BCW68G 80 1 Q101 2SC5084 81 5 Q102,Q204,Q205,Q302,Q304 HSC5262 82 1 Q104 HSC1010 83 1 Q203 DTA123JK 84 1 Q206 BFG35 85 1 Q207 2SK3476 86 10 R1,R17,R50,R201,R203, R205,R308,R518,R521,R524 10K 87 8 R3,R47,R118,R516,R523, R525,
52-7085UE5 Bill Of Materials Revised: Revision: June 4, 2015 June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 92 2 R16,R111 33K 93 2 R23,R304 150R 94 6 R24,R41,R45,R107,R219, R307 4.7K 95 5 R48,R49,R117,R204,R216 470R 96 2 R53,R102 1M 97 9 R60,R61,R248,R526,R527, R532,R533,R534,R546 47K 98 5 R101,R222,R309,R315,R316 100R 99 3 R103,R221,R318 2.2K 100 1 R104 220K 101 3 R105,R208,R220 22K 102 1 R106 1.
52-7085UE5 Bill Of Materials Revised: Revision: June 4, 2015 June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 108 1 R206 1.5K 109 1 R207 220R 110 1 R210 3.3K 111 1 R214 22R/1206 112 1 R218 27K 113 2 R226,R313 56R 114 1 R301 10R 115 1 R302 5.6K 116 1 R303 3.
52-7085UE5 Revised: Revision: June 4, 2015 Bill Of Materials June 4, 2015 13:59:51 Item Quantity Reference Part _____________________________________________________________ 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.
Welcome to PC Programmer. Please Read this file, before you first use the software. TABLE OF CONTENTS 1. 2. 3. 4. 5. Brief introduction Before Installing Install PC Programmer INSTRUCTIONS UnInstall PC Programmer 1. Brief introduction Welcome to PC Programmer. This program is designed to be used with the Interface Adapter. The following equipment will be needed to program the Device: A. A computer to install this program with at least 2 MB available space in hard disk and a 9-pin male RS-232 serial port.
4. INSTRUCTIONS 4.1 Connection 4.2 Start up PC Programmer 4.3 Edit Configuration 4.3.1 Open/Recall/Upload Configuration file 4.3.2 Edit Channel data 4.3.3 Set Option item 4.3.4 (Block)Cut/Copy/Delete/Paste 4.3.5 Auto-Frequency edit 4.3.6 Save a Configuration to disk 4.3.7 Download Configuration to device 4.3.8 Print a Configuration 4.4 Exit PC Programmer 4.1 Connection 1.Connect one side of Interface Adapter to the computer's serial port.
4.2 Start up PC Programmer 1.Select 'Start', choose 'Programs', click on the '*** Serial PC Programmer' program. 2.When HD Serial PC Programmer is started, a main form will be shown after a greeting form. 3.There has a menu bar at the top of the main form, and a message box at the bottom.
NOTE:The program is menu driven for all pertinent commands. All the commands can be accessed by either key board or the left mouse button. Access keys mainly used are: 'Tab' or 'Arrow' to move focus(or cursor) 'Enter' to active a focused command 4.3 Edit Configuration 4.3.1 Open/Upload Configuration file To edit the configuration, please either 1)Recall an Existing Configuration by click on the 'Open' item in the File Menu, select the configuration file by click on or input its name then press 'Enter' key.
2)To Edit System Option, Pop up input window for System Option, click "SYSTEM" in the 'OPTION' menu. 3)To Edit Advanced Option, Pop up input window for Advanced Option, click "ADVANCED OPTION" in the 'OPTION' menu. 4Use computer's cursor keys, Tab key, Enter key, arrow key or mouse to renew the Option Item. 5)Click 'OK' button on the input window to accept the change or 'CANCEL' to not change, and return back to Configuration Window. 4.3.
4.3.6 Save a Configuration to disk 1)Different configuration can be saved to disk. 2)Click on 'SAVE' item in 'FILE' Menu will overwrite an existing configuration file on your disk by current configuration. 3)Select 'SAVE AS' from 'FILE' Menu will save the current configuration by a name as you prefer. 4.3.7 Download to device To Download current Configuration to device, select 'DOWNLOAD' from sub menu under 'DEVICE' menu. 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 Q207 Q304 2SC3356 VCO D201 D304 D301 Q2,Q4 OSC ANT BNC TX SW RF OUT X1 TX/RX SW PA TRANSISTOR VCO PLL CONTROL TCXO SMT 1 2 1 CONT V 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 REG 1 Q203 3 3 3V TXEN1 8V VP MOD INPUT TX SW Q14 +13.
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 90 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.
