Kenwood NX-740H Service Manual page 24

4.2 Frequency and Signaling
The transceiver has been adjusted for the frequencies shown in
the following table. When required, re-adjust them following the
adjustment procedure to obtain the frequencies you want in ac-
tual operation.
Test frequency
Channel No. RX (MHz)
1 155.05000
2 136.05000
3 173.85000
4 155.00000
5 155.20000
6 155.40000
7~16
Analog Signaling
Signaling No. RX (Decode)
1 None
2 None
3 QT 67.0Hz
4 QT 151.4Hz
5 QT 210.7Hz
6 QT 254.1Hz
7 DQT D023N
8 DQT D754I
9 DTMF Decode
(Code: 159D)
10 None
11 None
12 FleetSync
(100-1000)
13 None
14 2-tone Decode
A: 304.7Hz
B: 3106.0Hz
15 None
16 Single Tone
(979.9Hz)
17 None
18 None
Digital Signaling
Signaling RX (Decode)
No.
1 RAN 1
2 None
3 RAN 1
4 FSW +PN9
5 Tone Pattern (1031Hz) Tone Pattern (1031Hz)
RAN: Radio Access Number
PN9: Pseudo-Random Pattern (for production only)
*1: To output 150Hz square wave (for production only)
1-24 (No.RA010<Rev.001>)
TX (MHz)
155.10000
136.10000
173.90000
155.00000
155.20000
155.40000
- -
TX (Encode)
None
20Hz Square wave
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 254.1Hz
DQT D023N
DQT D754I
DTMF Encode
(Code: 159D)
DTMF (Code: 9)
MSK (1010)
FleetSync (100-1000)
Single Tone (1000Hz)
2-tone Encode
A: 304.7Hz
B: 3106.0Hz
DTMF Tone (1477Hz)
Single Tone (979.9Hz)
MSK PN9
DTMF (Code: 3)
TX (Encode)
RAN 1
PN9
Maximum Deviation pattern
MOD Set-up *1
4.3 Preparations for Tuning the Transceiver
Before attempting to tune the transceiver, connect the unit to a
suitable power supply.
Whenever the transmitter is tuned, the unit must be connected to
a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a 4Ω
dummy load and connected to an AC voltmeter and an audio dis-
tortion meter or a SINAD measurement meter at all times during
tuning.
5 reference level adjustments frequency
TEST CH RX (MHz)
Low 136.05000
Low' 145.55000
Center 155.05000
High' 164.55000
High 173.85000
TX (MHz)
136.10000
145.50000
155.10000
164.50000
173.90000