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Chapter 30
Transmit Inhibit
The Transmit Inhibit feature allows you to stop all transmission including voice and data. The radio can
receive messages but is not able to reply the acknowledgment request of the received message.
This feature is available for APCO 25 Trunking, Type II Trunking, and Conventional operations for all
APX radios.
You can physically control the transmission of the radio especially during operation in hazardous
environments. An environment is considered hazardous if radio transmission could initiate an explosion
or other dangerous reactions.
30.1
Enabling or Disabling Transmit Inhibit
You can enable or disable Transmit Inhibit using the radio menu or Ignition Sense Line
Procedure:
Perform one of the following actions:
•
To enable or disable transmit inhibit, press the TxIn menu item.
•
To enable transmit inhibit, turn off the ignition through Ignition Sense Line.
•
To disable transmit inhibit, turn on the ignition through Ignition Sense Line.
If Transmit Inhibit is enabled, your radio shows the following indications:
•
A tone sounds.
•
The display shows Tx inhibit on.
NOTE: If you press the PTT button, a negative tone sounds.
If Transmit Inhibit is disabled, your radio shows the following indications:
•
A tone sounds.
•
The display shows Tx inhibit off.
NOTE:
The status of the Transmit Inhibit does not change after the radio powers up.
The TxIn softkey works, only if the Ignition Sense Line is turned on. If the Ignition Sense Line
is turned on, you can always turn on or off the Transmit Inhibition using the TxIn softkey. If
the Ignition Sense Line is turned off, the TxIn softkey is suspended, and the Transmit Inhibition
function is always off.
If PTT TX Inhibit is enabled on a multicontrol head and you press PTT on the active Control
Head, pressing any programmable button on the other Control Head causes a continuous
low-pitched tone. This tone is the Talk Prohibit Tone and the display shows Tx inhibit. You
can stop this occurrence by pressing PTT again on the active Control Head.
68012006035-FA
Transmit Inhibit
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