NGT Transceiver System Technical Service Manual 145
NGT—Checks and adjustments
This section contains the following topics:
Test equipment required (146)
Voltage regulators (147)
Crystal oven (152)
Low-pass filters (152)
Service mode (153)
Testing the keypad and display (159)
Adjustment locations and test points (160)
Checking the voltage-controlled oscillator (166)
Aligning the 45 MHz filters (167)
Aligning the 455 kHz IF and noise limiter (169)
Adjusting the exciter output level (170)
Adjusting carrier re-insertion (171)
Adjusting the exciter output spurious balance (172)
Adjusting frequency (173)
Adjusting mute (175)
Adjusting the PA (176)
Checking performance of the receiver (190)
Checking performance of the transmitter (194)
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