3-2 EF-701M INTERFACE
Audio Troubleshooting Tips
Symptom Cause Solution
Squealing feedback, levels
too high, distortion, call
signal stays on.
The local PL channel is not terminated. Check termination switches on PL
equipment and set appropriately. (One
termination per channel).
Levels seem low even after
adjustment.
The local PL channel has multiple
terminations.
Check termination switches on PL
equipment and set appropriately.
Echoes, hollow sound,
resonance.
Improper nulls and/or delays
introduced by digital signal processing,
A-to-D and D-to-A conversion and
other network-related processing.
Adjust the unit(s) for the best possible null.
This will help to minimize the effects.
Adjust the sidetone nulls on the party-line
stations and beltpacks.
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