Amron 2820A-02, User Manual, Page: 25 / 33

2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
2820A-02-UM REV 1.0
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7.4 LOW VOLUME
Check the volume control settings and adjust if necessary. Check the occupant connections
and verify that the occupant and operator are connected as intended. Verify the wires and
connector are clean and tight (see section 7.4 for additional information). Check the
BATTERY CONDITION INDICATOR and test the battery per section 9.0 if necessary. If the
communicator fails the check-out procedure, contact Amron for further assistance.
7.5 GARBLED VOICE TO CHAMBER
The LOCK VOLUME control is set too high. Reduce the volume until the voice signal clears.
If this does not solve the problem, check the chamber speaker or headset earphone for
corrosion or other defect. Replace if necessary. If the operator is using a headset, remove the
headset and communicate to the chamber by pressing the PUSH-TO-TALK BUTTON and
talking into the PANEL MIC. If this solves the problem then the operator headset may be wet
or defective. If the operator is using the PANEL MIC to talk to the chamber, check the PANEL
MIC for any accumulated dirt and clean if necessary. If these steps do not solve the problem
then contact Amron for further assistance.
7.6 GARBLED VOICE TO OPERATOR
The OPERATOR VOLUME control is set too high. Reduce the volume until the voice signal
clears. If this does not solve the problem, check the chamber talk-back speaker or headset
microphone for corrosion or other defect. Replace if necessary. If the operator is using a
headset, remove the headset and listen to the chamber using the PANEL SPEAKER. If this
solves the problem then the operator headset may be wet or defective. If these steps have
not solved the problem, then contact Amron for further assistance.
7.7 CHAMBER CUTS OFF
This is usually caused by an intermittent connection between either the chamber and the
communicator or the internal chamber wiring and the talk-back speaker or chamber headset.
Check all connections to verify that they are clean and tight. If the problem continues,
substitute the chamber to communicator cable with a known good cable. If this solves the
issue, then the original cable is damaged and needs to be replaced or repaired. If none of
these solutions fixes the problem, contact Amron for further assistance.
7.8 FEEDBACK FULL D U PLEX (4-WIRE) MODE
There are two forms of feedback that can affect the communicator: acoustic feedback and
cable crosstalk. Acoustic feedback occurs when an active microphone is close enough to pick
up and amplify the signal from a speaker or earphone. The required distance between the
microphone and speaker/earphone is dependent on the volume setting and the amount of
acoustic isolation. For example, an operator headset left sitting on a work table my cause
acoustic feedback. When the operator dons the headset at the same volume level, the
acoustic feedback will no longer occur. The operator's head provides acoustic isolation
between the microphone and earphone of the headset. The same is true for the chamber
occupant's headset microphone and earphone.