MODEL 2810E USER MANUAL
2810E UM
REV 7.0
26
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, a tender
headset left sitting on a work table my cause acoustic feedback. When the tender
dons the headset at the same volume level, the acoustic feedback will no longer
occur. The tender's head provides acoustic isolation between the microphone and
earphone of the headset. The same is true for the diver's microphone and
earphone.
To troubleshoot acoustic feedback issues first determine the source. One way to
quickly determine the source of the acoustic feedback is to cover each active
microphone with your hand, one at a time. Another method is to adjust the volume
controls one at a time. The volume control that stops the feedback indicates the
source. For example if the TENDER TO DIVER VOLUME control stops the
feedback, then the problem is likely in the diver's hat/helmet. Common sources are
feedback between the tender's headset microphone and the PANEL SPEAKER of
the 2810E. If the tender wants to operate with the headset and leave the PANEL
SPEAKER on, Amron recommends the tender move away from the 2810E by
using the Amron Model 2822-28 Remote Walk-and-Talk Module. This module
provides an "extension" cord for the tender headset allowing the tender to operate
away from the 2810E.
Crosstalk is caused by signal leakage between the microphone and earphone
wires in the umbilical cable. In a good cable with all the wires open (not connected)
the resistance between any two wires should be greater than 10 Meg-Ohms. Over
time, the cable can be damaged and this resistance drops to the point that
crosstalk can occur. When this occurs, the communication cable in the umbilical
should be replaced. For a temporary solution, you can try swapping the position of
the diver earphone wires on the DIVER EARPHONE jack. If you are using a
banana plug, simply unplug the diver earphone and rotate by 180 degrees before
reconnecting. If this does not solve the problem and the umbilical cannot be
immediately replaced, then operate in 2-Wire mode until a replacement umbilical
can be used. Amron strongly recommends the use of the Amron CC1
communication cable. It has been specially designed for clear communications and
long service life.
6.3.9
PUSH-TO-TALK DOES NOT WORK
If used, check the connection to the handheld microphone. A common issue is that
the yellow banana plug is not properly seated in the PUSH-TO-TALK JACK. If the
tender is using the PANEL SPEAKER as the microphone with the PUSH-TO-TALK
BUTTON, make sure the SPEAKER SWITCH is turned on. If neither of these
solves the problem, there could be a broken wire inside the diver communicator.
Open the front panel and inspect as described in section 5.3.3. If that does not
resolve the problem then contact Amron per section 2.2 for further assistance.
Summary of Contents for 2810E
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Page 16: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 12 DRAWING 2 WIRE CONNECTIONS 4 5...
Page 17: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 13 DRAWING FULL DUPLEX 4 WIRE CONNECTIONS 4 6...
Page 18: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 14 DRAWING PUSH TO TALK MICROPHONE CONNECTIONS 4 7...
Page 37: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 33 FRONT PANEL PARTS LOCATOR MODELS 2810E 2810E 1 8 1...
Page 38: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 34 CASE PARTS LOCATOR MODELS 2810E 2810E 1 8 2...
