Smart PTT Type

The Quick Key Override field is an override feature pertaining to these Tx "Inhibit On" selections. This override feature allows the radio-user to transmit regardless of the currently-selected "Inhibit On" rule.

If the radio-user attempts to transmit (by pressing the PTT Button) while a selected Tx "Inhibit On" rule is disallowing that transmission, the radio will exhibit one of two behaviors:

• If the selected Tx "Inhibit On" condition is met but the radio is currently muted, a continuous alert tone sounds until the PTT button is released. This would include, for example, cases where the repeater is busy with an encrypted conversation, but the radio remains muted due to a lack of secure support ("Inhibit on Status Symbols").

• If the radio is currently receiving and unmuted to a voice transmission, pressing the PTT button causes a short alert tone to sound; this is because the radio unmutes to the higher-priority voice audio after a brief interval.

SELECTIONS:

DEFINITIONS:

Disabled

Allows transmission when any transmission is detected on the current channel.

Inhibit On Wrong PL

 For analog (Non-ASTRO) voice calls: Prevents transmission when carrier squelch is detected with a PL code that does not match for the current personality / channel; If the busy channel PL code is a match for the current personality, radio transmissions are permitted.

For digital (ASTRO) voice calls: Prevents transmission when the radio does not unmute due to receiving a Talkgroup ID that does not match the current personality / channel's Talkgroup ID. If the busy channel Talkgroup is a match for the current personality / channel’s Talkgroup ID, radio transmissions are permitted.  Permissible Talkgroups are determined by the personality's  referenced ASTRO Talkgroup List.

Inhibit On Carrier

Prevents transmission when carrier squelch is detected on the current channel.

Inhibit on Correct NAC

Prevents transmission while the radio is receiving a digital (ASTRO) voice call that has a matching Network Access Code (NAC) for the current channel (see Rx / TA Network ID).

Inhibit on Status Symbols

Prevents transmission while receiving a digital (ASTRO) voice call and when the ’last-received’ signal status bit recorded was either "inbound busy" or "unknown".

Receiving analog signals is only possible when the Rx Voice / Signal Type field is "Non-ASTRO" or "Mixed Mode", and an MDC or QCII System Type has been selected in the Non-ASTRO Signaling Type field, and the corresponding Non-ASTRO System has been selected for the current Conventional Personality.

Receiving digital signals is only possible when the Rx Voice / Signal Type field is set to "ASTRO Mode" or "Mixed Mode", and an ASTRO - Conventional System has been selected in the ASTRO System field.