Courtesy Tone - ACC RC-85 Owner's Manual

RC-85 Repeater Controller Owner's Manual
ID Message" at the end of the repeater hang time. The Pending ID can rotate
between three ID messages for variety. In addition, a "Special ID Message" can
be added to the rotation for special events. The Pending and Special IDs can
conveniently contain informational messages, as they occur, without interfering
with conversations on the repeater.
If the repeater carrier is not allowed to drop during the Pending ID period (such
as if a conversation is in progress), the controller looks for a break between
user's transmissions for a period of three minutes to work in the "Anxious ID
Message". The Anxious ID could typically be a straight call sign Morse code ID
or brief synthesized speech ID to minimize distraction to users.
Finally, if the controller isn't give the opportunity to ID between user's
transmissions, it forces a "Forced CW ID Message" over the conversation in
progress following timeout of the sixty second Forced CW ID Timer. The cycle
then repeats and continues as long as there is repeater activity following an ID.

Courtesy Tone

Following each user's transmission, the repeater transmitter remains on for a
programmable period (hang time) with a courtesy tone provided to indicate that
the other use may transmit. The delay to the tone allows other stations to break
into the conversation. The fact that the repeater carrier may stay up
continuously during a conversation eliminates the "second squelch tail" in the
user's receiver, replaced instead by a pleasant, selectable courtesy tone.
Ten different courtesy tone "sets" including "no tone" are defined in the firmware
and may be chosen for use on the repeater with Control Op commands. A
Courtesy Tone Select logic input to the controller chooses between the Control
Op selected set and a second selectable set, allowing the courtesy tone to convey
information (high / low power, emergency power, etc.). A third selectable tone set
indicates a signal received on the link or remote base receiver, differentiating
link signals from repeater signals.
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