AVIONICS FLIGHT CHECKS (CONT)
quality reports from the other station and
note received signal quality.
The intelligibility of SSB voice operations becomes
degraded when the receiver and transmitter differ in
frequency by a small amount (approximately 50 Hz).
The voice pitch will sound either too high or too low.
The cause may be either the receiver or transmitter.
(e) Frequency accuracy - Check as follows:
Station WWV - Select the frequency
that provides the best signal. The
station broadcasts on 2.5000, and
frequency selected, the more accurate
the frequency check will be.
Do not key transmitter when set to WWV.
Mode selector - USB.
Listen to the time tick, tone, or voice
ADF radio set - Check as follows:
Power and mode switch - ADF.
Tuning knobs - Set test frequency. Tune
frequencies as nearly equally spaced as