Frequency And Signaling; Preparations For Tuning The Transceiver; Adjustment Points; Test Frequency - Kenwood NX-340 Service Manual

4.2

Frequency and Signaling

The transceiver has been adjusted for the frequencies shown in
the following table. When required, readjust them following the
adjustment procedure to obtain the frequencies you want in ac-
tual operation.

Test frequency

CH K, M
RX (MHz) TX (MHz)
1 485.05000 485.10000
2 450.05000 450.10000
3 519.95000 519.90000
4 485.00000 485.00000
5 485.20000 485.20000
6 485.40000 485.40000
7~16 -
CH
RX (MHz)
1 375.05000
2 350.05000
3 399.95000
4 375.00000
5 375.20000
6 375.40000
7~16 -
Analog mode signaling
No. RX
1 None
2 None
3 QT 67.0 Hz
4 QT 151.4 Hz
5 QT 210.7 Hz
6 QT 254.1 Hz
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: 304.7 Hz
B: 3106.0 Hz
15 None
16 Single Tone: 979.9 Hz
17 None
18 None
K2, P, M2, M3
RX (MHz) TX (MHz)
435.05000 435.10000
400.05000 400.10000
469.95000 469.90000
435.00000 435.00000
435.20000 435.20000
435.40000 435.40000
- -
K3
TX (MHz)
375.10000
350.10000
399.90000
375.00000
375.20000
375.40000
-
TX
None
20 Hz Square Wave
QT 67.0 Hz
QT 151.4 Hz
QT 210.7 Hz
QT 254.1 Hz
DQT D023N
DQT D754I
DTMF Encode
(Code: 159D)
DTMF (Code: 9)
MSK (1010..)
FleetSync: 100-1000
Single Tone: 1000 Hz
2-tone Encode:
A: 304.7 Hz
B: 3106.0 Hz
DTMF Tone: 1477 Hz
Single Tone: 979.9 Hz
MSK PN9
DTMF (Code: 3)
NXDN mode signaling
No.
1
2
3
4 FSW+PN9
RAN: Radio Access Number
PN9: Pseudo-Random Pattern (for production only)
*1: To output 150Hz square wave (for production only)
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 8Ω
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 450.05000
Low' 467.55000
Center 485.05000
High' 502.55000
High 519.95000
TEST
CH
Low
Low'
Center
High'
High
4.4

Adjustment Points

CVIN
RX
RAN1
None
RAN1 Maximum Deviation Pattern
Mod set-up *1
K, M K2, P, M2, M3
TX (MHz) RX (MHz)
450.10000 400.05000
467.60000 417.55000
485.10000 435.05000
502.60000 452.55000
519.90000 469.95000
K3
RX (MHz) TX (MHz)
350.05000 350.10000
362.55000 362.60000
375.05000 375.10000
387.55000 387.60000
399.95000 399.90000
TX-RX UNIT
Component side view
(No.RA003<Rev.004>)1-17
TX
RAN1
PN9
TX (MHz)
400.10000
417.50000
435.10000
452.50000
469.90000