GAI-Tronics 400-003 IEC / ATEX Zone 1 RigCom Station - Manual (Page 12)

Pub. 42004-460A
Model 400-003 IEC/ATEX Zone 1 RigCom Station Page: 12 of 16
f:\standard ioms - current release\42004 instr. manuals\42004-460a.doc
09/12
Operation
The operator has access to an on-off/volume control switch and the push-to-talk push button.
The on-off/volume control switch allows the operator to turn the unit on or off and adjust the volume
level in the listen mode.
Turn the unit off by turning the switch completely anti/counterclockwise. For maximum volume adjust
the switch completely clockwise.
The push-to-talk push button controls the audio communication between stations.
When activated, the push-to-talk switch allows the operator to send a message to another station. When
not activated, the station is listen mode and the station receives messages from other stations. When a
station is configured as a Slave station, the push-to-talk switch has no function.
Common Line System
In the Common Line configuration, all of the stations are on common talking path and are normally in the
listen mode. When one of the stations has its push-to-talk toggle switch activated, its audio signal is
supplied to the audio lines. All other units receive the audio signal and broadcast the announcement over
their speakers. The push-to-talk switch must be held down as long as the operator talks. Releasing the
switch deactivates the microphone and returns the unit to the listen mode.
Figure 10. Common Talk Wiring Detail