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Страница 2: ...X 120 D mm Weight Approx 0 945 kg 2 RECEIVER Receiving System Super Heterodyne Frequency 1 st IF 10 695 MHz 2 nd IF 455 MHZ Sensitivity 0 5 V for 12 dB SINAD in FM mode Audio Distortion Less Than 8 1...
Страница 3: ...ls cease on your channel Then rotate the squelch control knob clockwise to a point where the background noise disappears Note When the squelch is set properly the speaker will remain quiet until a sig...
Страница 4: ...used to limit the incoming modulation C Receiver CB receiver is dual conversion super heterodyne type with the first IF 10 695 MHz and second IF 455 KHz Receiver is separated into two blocks 1 st IF s...
Страница 5: ...uelch circuit components RV5 VR2 IC7 Replace defective components Squelch does not work Defective VR2 RV5 IC3 D Replace defective components Re adjust Squelch sensitivity No modulation Defective micro...
Страница 6: ...um Power Analyzer Supply Modulation Wattmeter Radio Meter 10W U U T Oscilloscope Frequency Audio Gen Counter B RX test setup SINAD Meter RF Signal Power Generator Supply Distortion 8 ohm Radio Meter l...
Страница 7: ...eq 27 225MHz Mod 1 2KHz Fmod 1KHz Output level 0 5uV 3 Adjust the volume control for 2V output on distortion meter read 4 Adjust L2 L3 for more than 12dB at SINAD meter T Squelch Sensitivity 1 UUT set...
Страница 8: ...rimmer capacitor CT1 to 27 185000 500Hz on frequency counter TX Modulation Deviation 1 UUT set to FM EU CH19 input of power meter to antenna input terminal Couple to MIC socket from the audio frequenc...
Страница 9: ...0 G 0 7 0 9 C 8 0 0 S 0 0 B 2 0 0 D 0 6 1 Q16 E 0 0 C 8 5 3 0 B 1 0 0 Q17 E 0 0 C 13 2 2 0 B 13 0 0 Q18 E 0 7 3 C 0 0 B 0 5 7 9 Q19 E 8 1 8 10 C 7 9 0 B 7 3 7 9 Q28 E 6 1 6 1 C 8 1 8 1 B 6 8 6 8 Diode...
Страница 10: ...0 7 0 7 5 5 0 5 0 13 0 0 6 0 0 14 0 0 7 0 0 15 4 7 4 7 8 0 0 16 4 1 4 1 IC3 PIN TX RX PIN TX RX 1 3 2 3 2 8 0 1 8 2 3 2 3 2 9 0 1 8 3 3 2 3 2 10 0 1 8 4 7 9 7 9 11 0 0 5 3 7 3 7 12 0 0 6 3 9 3 9 13 0...
Страница 11: ...1 0 1 38 1 2 1 2 7 0 0 39 0 0 8 4 2 4 2 40 1 2 1 2 9 3 2 3 2 41 1 5 1 5 10 5 0 5 0 42 1 5 1 5 11 0 0 43 1 5 1 5 12 0 0 44 2 6 2 6 13 0 0 45 2 6 2 6 14 4 9 0 46 2 6 2 6 15 0 0 47 2 6 2 6 16 5 0 5 0 48...
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