SVR-200 Service Manual SVR-200 Vehicular Repeater This manual is intended for use by qualified technicians and includes all necessary information pertaining to the SVR-200 operation, circuit design and maintenance. Changes that occur after date of printing will be incorporated in supplemental service publications.
SVR-200 Service Manual Foreword Scope of this manual This manual contains the specifications, functional description, operating instructions, schematic, parts locator and parts list for the SVR-200 synthesized vehicular repeater. This manual is intended for use by qualified service technicians to aid them with installation, interfacing, alignment and trouble shooting of the SVR-200 when used with other land mobile radios.
SVR-200 Service Manual Specifications Transmitter: VHF UHF 700/800/900 MHz Frequency Range: 150-174 MHz Rf power out: Spurious emissions: Freq stability -30°~+60°C: Modulation: Hum and Noise: Audio response (300-3kHz): Audio distortion: Local mic sensitivity: FCC Type Acceptance: Industry Canada Approval: 250mW - 2W -50dBc 1.5 PPM 16K0F3E/11K0F3E -40/-37dB (25/12.
SVR-200 Service Manual Functional Description Generally, vehicular repeaters are used as mobile extenders in cross-band operation: the link is VHF/UHF/800 MHz simplex and the mobile is Lo-band, VHF, UHF or trunking. In-band operation is possible, but care must be taken to prevent interference between the mobile's higher power transmitter and the repeater receiver. Proper frequency selection and antenna placement are important even in cross-band operation, but especially for inband use.
SVR-200 Service Manual If another unit were to arrive from a different scene and it is still the active priority, there will be two active repeaters on the air when a condition to repeat exists. When one of the SVR-200s unkeys to check for handheld activity, it will detect the presence of the other active SVR-200 and increment it’s priority counter and cease transmission. This is the self clearing mode to prevent radio collisions.
SVR-200 Service Manual Installation Before installing the SVR-200, ensure that the RF and repeater sections are properly aligned per the tuning instructions on pages 8-14 of this manual. Additionally, ensure that the SVR-200 jumpers are properly configured for use with the particular mobile radio that it will be connected to: J1 Controls the maximum drive level of the transmit audio output to the mobile radio. If J1 is installed, output amp U1B will have an adjustment range of 0-100 mVPP.
SVR-200 Service Manual Pin 3: Blue Pin 4: Green Pin 5: Red Pin 6: Yellow Pin 7: Violet Pin 8: Brown Pin 9: Gray Remote enable/disable. Connect to the radio's auxiliary output or a separate switch to remotely enable or disable the repeater. If this line goes high to activate the repeater, ensure that JP1 is set to the “+” position. If this line goes to ground, set JP1 to the “-” position.
SVR-200 Service Manual Alignment VHF Before aligning the SVR-200, ensure that the mobile radio is aligned per the manufacturer’s service procedure; Ensure that the SVR-200 is properly programmed and the jumpers are set per the previous section. In order to properly align the SVR-200, you will need two service monitors and the mobile radio that the repeater will be installed with. Refer to figure 1 for alignment points.
SVR-200 Service Manual VHF Receiver 1. Receiver front end: Connect a DC voltmeter to TP1 on the SVR-200 main board. Set the service monitor connected to the SVR-200 to the generate mode, receive frequency with a 1kHz tone and 60% deviation. Adjust the RF output of the monitor for a 1VDC reading at TP1. Adjust L1-L5 on the RF board for a maximum reading at TP1. 2. Repeater squelch: Adjust the service monitor RF output for .5μV. Adjust RV9 on the SVR-200 main board so the repeater COR LED is just on.
SVR-200 Service Manual Alignment UHF Before aligning the SVR-200, ensure that the mobile radio is aligned per the manufacturer’s service procedure; Ensure that the SVR-200 is properly programmed and the jumpers are set per the previous section. In order to properly align the SVR-200, you will need two service monitors and the mobile radio that the repeater will be installed with. Refer to figure 2 for alignment points.
SVR-200 Service Manual UHF Receiver 1. Receiver front end: Connect a DC voltmeter to TP1 on the SVR-200 main board. Set the service monitor connected to the SVR-200 to the generate mode, receive frequency with a 1kHz tone and 60% deviation. Adjust the RF output of the monitor for a 1VDC reading at TP1. Adjust BPF1 and BPF2 on the RF board for a maximum reading at TP1. 2. Repeater squelch: Adjust the service monitor RF output for .5μV. Adjust RV9 on the SVR-200 main board so the repeater COR LED is just on.
SVR-200 Service Manual Alignment 700/800/900 MHz Before aligning the SVR-200, ensure that the mobile radio is aligned per the manufacturer’s service procedure; Ensure that the SVR-200 is properly programmed and the jumpers are set per the previous section. In order to properly align the SVR-200, you will need two service monitors and the mobile radio that the repeater will be installed with. Refer to figure 3 for alignment points.
SVR-200 Service Manual 700/800/900 MHz Receiver 1. Receiver front end: Connect a DC voltmeter to TP1 on the SVR-200 main board. Set the service monitor connected to the SVR-200 to the generate mode, receive frequency at .5μV RF output with a 1kHz tone and 60% deviation. Confirm a reading of 1VDC ±.2VDC at TP1. 2. Repeater squelch: Adjust the service monitor RF output for .5μV. Adjust RV9 on the SVR-200 main board so the repeater COR LED is just on. Decrease the service monitor RF output to .
SVR-200 Service Manual Communications Monitor A Mobile Radio Communications Monitor B Interface Cable SVR-200 Figure 4 Page 14
SVR-200 Service Manual Programming Using the Software The SVRCPS personalization software is used to program the SVR-200 for all of the operating parameters and options. The software is compatible with Windows 2000 and later operating systems The software is menu driven and on-line help is available at any time by clicking the left mouse button on the HELP icon on the right side of the tool bar.
SVR-200 Service Manual Mobile COR polarity: Determines if the COR signal from the mobile is active high or active low. Radio Type: Select either conventional or trunking. If a trunking mobile is selected, the SVR-200 will go through the voice channel acquisition procedure during portable-to-base repeat mode. On-air polarity: Select either active high or active low. This line is used to monitor the local mobile PTT for local mic repeat on conventional radios.
SVR-200 Service Manual Receiver: Theory of Operation The receiver is a double-conversion superheterodyne type, designed for narrow band FM reception. The first local oscillator is derived from the frequency synthesizer. The second LO is crystal controlled. RF Stage: The incoming RF signal from the antenna jack is directed to the first RF bandpass filter to improve selectivity and then to the input of the RF amplifier. The output of the RF amplifier is then presented to a second bandpass filter.
SVR-200 Service Manual Receive audio path: Receiver audio from the transceiver module is input on P2 pin 13 and presented to U5 pin 10 and pin 16. Pin 10 is the input of the receiver highpass filter to remove any sub-audible signals before being output on pin 11 and sent to U4 for receiver audio processing. Pin 16 is the input to the sub-audible tone decoder section of U5. Receive audio entering pin 7 of U4 is processed as flat, or -6db/octave depending upon PC programming.
SVR-200 Service Manual P1.5 Serial clock line output. Serial data that is sent to the PLL, the E²PROM and the audio processor chips are clocked by each low-high-low transition on this line. P1.6 Serial data output. Data sent to U10, U4 and U5 are output on this line and clocked by P1.5. P1.7 Data input to the microprocessor. Serial data is read from U10 (E²PROM) and U5 (sub-audio processor) on this line. P2.0 Lock tone output.
SVR-200 Service Manual T0 Test input, active low. Shorting J3 puts the microprocessor into test mode for alignment purposes. If shorted at power up, the receiver will operate open squelch mode and audio will be heard at the local speaker port regardless of carrier or tone input to the receiver. Although alignment is normally done with the RSSI output at TP1, a Sinad reading can be obtained using this mode of the test input.
SVR-200 Service Manual Notes This Page Intentionally left blank Page 21
SVR-200 Service Manual Parts List Reference Description Part # C1,C5,C6,C9,C10,C12,C15,C18,C35,C37 ......................... .1μFd chip capacitor ............................ 1010-03-5104 C2 ..................................................................................... 22μFd 16V tantalum chip capacitor ..... 1610-25-6226 C3,C27 .............................................................................. .047μFd chip capacitor ........................ 1010-03-5473 C7,C8,C13,C41 .................
SVR-200 Service Manual R50,R77-R80 .................................................................... 15K chip resistor ................................. 2010-03-5153 R54-R62,R64 .................................................................... 330 Ohm chip resistor ......................... 2010-03-5331 R68,R69 ............................................................................ 4.7K chip resistor ................................ 2010-03-5472 R43 ...............................................
4/13/2009 09:34:38a f=1.35 N:/EAGLE/Projects/SVR200L/SVR200.
3 Q2 2N4401 J8 Q3 IRF9540 R6 22K R5 820 JP1 1 2 3 4 5 9 VDC R7 5K6 J9 cw RV1 10K R9 56K D6 BAV99 3 R14 2 + C21A J11 TL2272 SW B+ J2 820 U1A R8 100K 6U8 R10 RV2 100K R72 2K2 J4 J12 RV3 100K cw U6 LM386 6 R2 22K Local Mic Sens cw R84 100K R13 2K2 10K 5 U1B TL2272 C6 .1U R18 cw R17 Mob Dev 9 VDC 22K J6 22K P5 VCC D C B A J5 R15 22K Q8 C10 .
4 3 2 1 R26 100 C41 .1 L9 S-227-5005 C75 1uF C38 .1 RX5V L33 S-227-5008 .01 R18 56K C17 12p C19 2p C20 1p C81 2p C82 1p C83 12p C80 1N0 L27 C37 C25 12p L11 120nH C86 10p D R20 150 C27 2p R9 47 C32 39p C84 15p 85633R25 C26 68p 68p L2 150-04J08S C35 33p 82nH C85 68p C39 10p L7 S-227-5008 R54 560 C40 1N0 R24 56K C36 5p R53 10 L28 C87 68p L1 150-04J08S FL1B 45MHz Q12 25139 22nH Q9 L8 3.
5 4 3 2 1 S-227-5005 R26 100 RX5V R18 56K C17 12p C19 2p C20 1p C81 2p C82 1p C83 12p C25 12p C27 2p R9 47 C32 39p C28 1p Q9 C84 15p 85633R25 C26 68p C85 68p C87 68p L2 150-04J08S 56K U1 MC3371D R25 L4 150-04J08S L3 150-04J08S C40 1N0 FL1B 45R15 C35 33p L28 82nH R54 560 C36 5p Q11 MMBFJ309 R53 10 Q12 25139 L6 22nH L1 150-04J08S L9 R24 L8 3.9uH FL1A 45R15 C29 12p L27 120nH C18 68p C38 .1 L33 S-227-5008 C75 1uF R27 39K 10K L11 33nH C80 1N0 C86 10p D C37 .
4 3 2 1 Rx Audio RSSI R19 100K R37 150K R38 220 L7 S-227-5005 S-227-5008 R4 L9 27nH Q7 NE25139U72 C11 Q2 85633-S R39 1K C75 1N0 C58 1N0 C74 C12 .047 5p R1 FL1A 45MHz FL1B 45MHz 220 C9 5p C8 33p R2 Q9 85633-S C5 5p AUDIO QUAD 8 10 FILT IN DECPLE 7 DECPLE 6 LIM IN 5 11 FILT OUT 12 SQ IN 13 MTR DRV 3.9uH R40 330 R22 56K L6 L10 100nH C77 100p 9 .01 C35 8p 14 MUTE 15 GND 16 C10 5p 10 C14 1uF U2 10K L21 3.
5 4 3 2 1 Rx Audio RSSI Rx 5V R19 100K L2 S-227-5008 C76 1N0 C34 .01 C3 39p BPF2 7HW-45025A-460 L9 27nH MC3371D C14 1uF 10K FL1B 45MHz R2 10 C9 5p C8 33p Q1 MMBFJ309 Q7 NE25139U72 C35 8p C58 1N0 C10 5p R3 10K C7 12p R39 1K R5 47 U2 R4 FL1A 45MHz L21 3.3nH Q2 85633-S C36 27p L6 3.9uH 220 L1 15nH D C11 .01 L4 S-227-5005 R22 56K R1 R20 220 BPF1 302MXPR-1110-D C12 .
4 3 2 1 RX Audio R39 100 RSSI RX5V D L10 C50 .01 C44 .01 R28 10 R27 100 R26 100K C49 39P C45 100P L11 22N BPF1 3 Pole BPF2 2 Pole T1 S2275008 L8 3U9 C48 FL1A R31 10 FL1B C53 5P T2 S2275008 L12 Q4 85633-R25 Chart R32 10K C51 1N0 R30 1K0 C58 5P C54 33P D 9 AUDIO QUAD 8 10 FILT IN DECPLE 7 11 FILT OUT DECPLE 6 12 SQ IN LIM IN 5 13 MTR DRV 14 MUTE 15 16 VCC 4 MIX OUT 3 GND XTAL 2 MIX IN XTAL 1 R36 C60 12P Q6 MMBF309 C52 12P R8 R34 56K C57 .
5 4 3 2 1 FL2 WB 455E RX Audio RSSI R39 100 C62 1U0 RX5V L17 C50 .01 C44 .01 C55 .01 R28 10 D R27 100 R26 C49 39P 100K C45 100P L11 22N BPF1 3 Pole BPF2 2 Pole R33 10K L8 3U9 T1 S2275008 C56 1N0 C48 Chart Q5 25139 FL1A C46 4P Q4 85633-R25 C47 27P U9 MC3371D R31 10 FL1B L12 Chart C54 33P C52 12P C51 1N0 R30 1K0 Q6 MMBF309 C53 5P T2 S2275008 R32 10K C57 R34 .
