Kenwood NEXEDGE NX-340, Service Manual

Page: 17 / 44

(No.RA003<Rev.004>)1-17
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
„ Analog mode signaling
„ NXDN mode signaling
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 8
Ω
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
4.4 Adjustment Points
CH K, M K2, P, M2, M3
RX (MHz) TX (MHz) RX (MHz) TX (MHz)
1 485.05000 485.10000 435.05000 435.10000
2 450.05000 450.10000 400.05000 400.10000
3 519.95000 519.90000 469.95000 469.90000
4 485.00000 485.00000 435.00000 435.00000
5 485.20000 485.20000 435.20000 435.20000
6 485.40000 485.40000 435.40000 435.40000
7~16 - - - -
CH K3
RX (MHz) TX (MHz)
1 375.05000 375.10000
2 350.05000 350.10000
3 399.95000 399.90000
4 375.00000 375.00000
5 375.20000 375.20000
6 375.40000 375.40000
7~16 - -
No. RX TX
1 None None
2 None 20 Hz Square Wave
3 QT 67.0 Hz QT 67.0 Hz
4 QT 151.4 Hz QT 151.4 Hz
5 QT 210.7 Hz QT 210.7 Hz
6 QT 254.1 Hz QT 254.1 Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 DTMF Decode
(Code: 159D)
DTMF Encode
(Code: 159D)
10 None DTMF (Code: 9)
11 None MSK (1010..)
12 FleetSync: 100-1000 FleetSync: 100-1000
13 None Single Tone: 1000 Hz
14 2-tone Decode:
A: 304.7 Hz
B: 3106.0 Hz
2-tone Encode:
A: 304.7 Hz
B: 3106.0 Hz
15 None DTMF Tone: 1477 Hz
16 Single Tone: 979.9 Hz Single Tone: 979.9 Hz
17 None MSK PN9
18 None DTMF (Code: 3)
No. RX TX
1 RAN1 RAN1
2 None PN9
3 RAN1 Maximum Deviation Pattern
4 FSW+PN9 Mod set-up *1
TEST
CH
K, M K2, P, M2, M3
RX (MHz) TX (MHz) RX (MHz) TX (MHz)
Low 450.05000 450.10000 400.05000 400.10000
Low’ 467.55000 467.60000 417.55000 417.50000
Center 485.05000 485.10000 435.05000 435.10000
High’ 502.55000 502.60000 452.55000 452.50000
High 519.95000 519.90000 469.95000 469.90000
TEST
CH
K3
RX (MHz) TX (MHz)
Low 350.05000 350.10000
Low’ 362.55000 362.60000
Center 375.05000 375.10000
High’ 387.55000 387.60000
High 399.95000 399.90000
CVIN
TX-RX UNIT
Component side view