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OPERATING FEATURES
3-22.
Conventional System Operation
Up to
250
(MAX)
channels can be programmed for
each system programmed as a conventional system.
Channels can be selected by the group key.
OT
(~uiet-~alk), DQT (D~gital Quiet-Talk), or carrier
squelch can be set for transmit or receive channels. If
signaling is set for transmission, a squelch tail elimina-
tor (reverse burst or turn-off code) is transmitted.
Talk-around
The Talk-around feature can be programmed for
each channel.
Transmit disable (receive-only channels)
Transmission can be programmed to be inhibited for
:
each channel. This feature is used to set receive-only
h
channels. When the
PTT
button is pressed on a re-
ceive-only channel, a busy tone sounds, and transmis-
sion is not performed.
Busy channel lockout
The busy channel
lockout feature can be pro-
grammed for each channel.
If a channel is locked out
by pressing the
PTT
button, a busy tone is output, and
if transmission
becomes possible, it starts.
Scanning conventional systems
For the convent~onal system scan, only the revert
channel of each system
IS
scanned. If QTor DOT is set
for the channel, the channels, including signaling, are
scanned.
The KDD-4 can be set
with the decode ID of each
group.
If it is
supporled, the following features are
available:
Audio mute
If the decode latch Input port is low during reception
and the LTR data or signaling matches (when the
squelch is open if signaling is not set), the audio is out-
put.
During
systemlgroup scanning, the "-SCAN-" dis-
play changes to the systemlgroup display (or alphanu-
meric display).
If it is the last call, the revert system/
group returns.
Call indicator, alert tone
If the Decode Latch input port changes from high to
low during reception and the LTR data or signaling
matches (when the squelch is open if signaling is not
set), a KDD-4 alert tone is output.
CALL lights or
flashes (or nothing occurs) according to the CALL
indicator set for each group.
The CALL
indicator1KDD-4 alert tone does not oper-
ate unless the Decode Latch input port goes high.
Operation during scan
If signaling matches during scanning, the scan stops
at the system. The display shows "-SCAN-" until the
Decode Latch input port goes low. When the
port
goes low, the system/group is displayed.
3-23.
External Decoder (KDD-4 Option)
TK-9401941
The optional DTMF decoder (KDD-4) ca
in the transceiver. Use of the optional dec
programmed for each group (for each
chan
ventional system). The monitor key fun
external decoder reset key
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KDD-4
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Fig.
3
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