2830A THREE DIVER COMMUNICATOR USER MANUAL
2830A-UM
REV 5.0
21
feature. This allows the tender to finely adjust the level necessary and lock the control to
prevent accidental adjustments.
At power-up, all the controls should be in the minimum (far left) position. Have the diver
speak and adjust the DEPTH CONTROL as necessary to achieve the best speech quality.
Then adjust the TREBLE BOOST as necessary to improve the quality. There is some
interaction between these controls so you may have to go back and adjust the DEPTH
CONTROL. Once the best speech quality settings are found, the NOISE REDUCTION
FILTER can be adjusted, if necessary, to reduce any background noise.
Operating in 2-Wire and Full Duplex (4-Wire) modes are possible with the HSU. In 2-Wire
mode, the tender's push-to-talk switch interrupts signals from the diver. In Full Duplex mode,
the tender will hear the diver at all times and tender must use a headset to talk to the divers
without using the push-to-talk switch. Use of a headset to monitor helium speech is strongly
recommended to enhance intelligibility.