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CH: 14 | CT702 | Phase-Locked Loop (PLL) Adjustment
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CH: 15 | CT701 | Adjust CT701 to 10.399850 MHz ±0.00001 MHz. | |||||||||||||||||||||
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CH: 14 | CT702 | Check for a frequency of 10.400000 MHz. If
the tolerance is more than ±10 Hz, readjust CT702. | |||||||||||||||||||||
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CH: 15 | No adjustment | Connect the oscilloscope to TP4 and confirm that
the waveform is a sine wave with a peak-to-peak voltage of 550 mV ±100 mV. | |||||||||||||||||||||
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CH: 9 | L701 | Voltage-Controlled Oscillator (VCO)
Adjustment
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CH: 4, 5, 6, 7, 8 | No adjustment | Confirm that the VCO is at the channel voltage listed
in the following table:
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CH: 1 | L704 | Adjust L704 to 1.2V at TP2. | |||||||||||||||||||||
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CH: 2, 3 | No adjustment | Confirm that the VCO is at the channel voltage listed
in the following table:
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L604 | IF Adjustment
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L2 | Discriminator Adjustment
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Volume control | Adjust the sensitivity as follows:
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L604 L611 L613 |
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L607 L612 |
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CT601 CT602 CT603 |
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CH: 8, 9 SG: FM |
No adjustment | Confirm that the 12 dB SINAD sensitivity is less
than 1.0µV for each channel. | |||||||||
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CH: 10, 11, 12 | No adjustment | Confirm that the 12 dB SINAD sensitivity is
less than 1.6µV for each channel. | |||||||||
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CH: 5 SG: 162.40 MHz SINAD: 21 dB (TYP. 0.7µV) FM Squelch: Fully counterclockwise |
VR2 | Adjust the squelch as follows:
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CH: 5 SG: No signal |
VR1 | Adjust VR1 for a symmetric noise waveform at
R36.
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