EDACS REPEATERS
2-19
Rx Distortion
Receiver distortion.
The Rx Distortion test measures the distortion level of the signal received and demodulated by the
repeater.
The test fails if the distortion level is above the prescribed limit.
The Service Monitors RF carrier is modulated at a frequency of 1 kHz at the nominal modulation
level. The demodulated audio from the repeater is fed to the AF INPUT of the Service Monitor,
which measures the Rx distortion.
Failure messages are:
*FAIL* ABORTED BY USER
User halted program before test was complete.
*FAIL* LOW DEMOD LEVEL
Receiver audio level <5 mV
Rx S/N
Receiver S/N.
The Rx S/N test measures the signal to noise level.
The test fails if the signal to noise level is below the prescribed limit.
The Service Monitors RF carrier is modulated at a frequency of 1 kHz at the nominal modulation
level. The demodulated audio from the repeater is fed to the AF INPUT of the Service Monitor,
which measures the Rx S/N.
Failure messages are:
*FAIL* ABORTED BY USER
User halted program before test was complete.
*FAIL* LOW DEMOD LEVEL
Receiver audio level <5 mV