Section 3. Operation
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disabled for each user with the “DTMF COMMANDS” enable function. An alert tone is sent
in the squelch tail while the cross encoding is active. Command sequence:
•
If the DTMF regenerate mode is enabled for the user, a long “0” will enter the
car-to-car mode.
•
The Tx-hold time is set at 30 seconds during the cross-tone mode.
•
An “Eeddll-eeddll-eeddll” queuing tone will indicate that cross-tone encoding is
defeated.
•
A long “#” (greater than .75 second) will exit the mode.
Remote PTT Function
The site alarm input may be used as a “Remote PTT” function. This feature is initiated by the
site alarm input being pulled to ground by a contact closure or other input. When the alarm
input goes active, any repeater activity will be suspended, then the programmed CTCSS tone
or DCS code will be encoded, the repeat audio squelched, and the transmitter keyed. This
condition will continue until the site alarm input is released.
This feature can be used for wireline control of the transmitter from a tone or DC remote
control, or by wiring the local mic PTT to this input, a method of local control to talk to
specific users. See the site alarm system programming section.
Site Alarm
The Site Alarm feature sends out an audible alert, DTMF page, and CTCSS/DCS encode in
response to a contact closure input. This can be used to monitor external functions such as
system break-in or power failure. The alarm DTMF code can be received by a Zetron Model
8 Repeater Programmer / Timekeeper for remote alarm monitoring. Whenever the alarm
input is held in the active state, a 2000 Hz confirmation beep tone is sent over the transmit
audio just prior to unkeying when the repeater is in use.
