Garmin GNC 420 Maintenance Manual page 75

5.7.2.20 Frequency Modulation
FM deviation is to be measured with an average responding
detector, which is RMS sine wave calibrated. The result is to be
divided by 0.707 to yield the mathematical peak deviation.
1. Modulate the transmitter with a standard modulator input signal.
2. Verify the FM deviation does not exceed 1 kHz.
118.005 MHz ______ kHz
127.500 MHz ______ kHz
136.500 MHz ______ kHz
5.7.2.21 Com Remote Transfer Input
Ground Pin 15 of J2 and verify the status of the XFR box on the Com Setup Test Page changes
accordingly.
_________ OK
Page 5-24
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05