Kenwood TKR-750 Service Manual page 8

TKR-750
Function
Scan On
Scan On/Off
Scrambler Off
Scrambler On
Scrambler On/Off
Squelch Off
Squelch On
Squelch On/Off
Squelch Momentary
Take Over On/Off
Test Tone Off
Test Tone On
Test Tone On/Off
TOT Disable
TOT Enable
TOT Disable/Enable
TX Disable
TX Enable
TX Disable/Enable
None
5. Simplex/Duplex Operation
The Simplex/Duplex function is used to specify whether
the channel is used as simplex (receiver muted during trans-
mit) or duplex (receiver unmuted during transmit). If the
channel has same TX/RX frequency, it can operate only in
Simplex mode.
6. Repeater/Base Station Operation
The Repeat function is used to specify whether the chan-
nel is used as a repeater or as a base station. A repeater
simultaneously and automatically re-transmits its received
audio, a duplex base station has independent simultaneous
transmit and receive paths, a simplex base station are mutu-
ally exclusive transmit and receive paths.
7. Signalling Feature
7-1. Multiple QT/DQT
The TKR-750 can function as a multiple-QT/DQT decode/
encode unit for operation as a community repeater or mul-
tiple-QT/DQT base station. Two Multi Tables, called Main
and Sub, can be created, each consisting of 16 decode/en-
code combinations.
8
OPERATING FEATURES
Trigger PF keys AUX
input
No Yes
Yes Yes
No Yes
No Yes
Yes Yes
No Yes
No Yes
Yes Yes
Yes No
Yes No
No Yes
No Yes
Yes Yes
No Yes
No Yes
Yes Yes
No Yes
No Yes
Yes Yes
Yes Yes
Save Start up Power
on/off supply
Yes Yes Yes
No No No
Yes Yes Yes
Yes Yes Yes
No No No
Yes Yes Yes
Yes Yes Yes
No No No
No No No
No No No
Yes Yes Yes
Yes Yes Yes
No No No
Yes Yes Yes
Yes Yes Yes
No No No
Yes Yes Yes
Yes Yes Yes
No No No
Yes Yes Yes
The Multi Table function enables the TKR-750 to decode
any one of the 16 QT/DQTs pre-programmed into the Multi
Table. When receiving a signal (repeater operation), the re-
peater uses the QT/DQT encode which corresponds to the
decoded QT/DQT as set in the Multi Table. In the Multi
Table, signalling pair of "No.1" (first column) is defined as
"Primary". A receiving signalling (if it is contained within
No.1 to No.16) is defined "Current".
From No.2 to No.16, signalling pairs that can be changed
between "Main Table" and "Sub Table" using AUX I/O
Ports 1-4 are assigned as "Multi Table Select" and the Multi
Table Main, the Multi Table Sub or the Multi Table Main/Sub
function is executed. When AUX I/O Ports 1~4 are set for
"Multi Table Select", these are 4 bit Binary Coded Decimal
(BCD) inputs .AUX I/O 1 is a least significant bit (LSB), and
"1101" input (LSB on the right side) signifies the Table No.2
and "1100" input signifies the Table No.3.
7-2. Encode Tone in Multiple
When Local Microphone PTT or External PTT is active
while the repeater is in use or the duplex-base station is re-
ceiving, the encode signalling is determined according to
Encode Tone in Multiple function. The simplex-base station
always transmits the "Primary" encode QT/DQT.
Condition of LED in he PF key on
–
Turns on in ON status.
–
–
Turns on in ON status.
–
–
Turns on in OFF status.
Turns on in OFF status.
Turns on in ON status.
–
–
Turns on in ON status.
–
–
Turns on in Disable status.
–
–
Turns on in Disable status.
Do not turn on.