Kenwood M) Service Manual page 26

TK-2160
Adjustment points TX-RX unit (X57-672)
Component side view
TXD
PTTO
SP–
PTTI
(RXD)
SP+
DET
X57-672 A/2
Component side
BATT+
ANT
VR1 : Frequency adjustment
RSSI : Band-pass wave form test point
Foil Side View
ALT2
A4
A3
A4
A1
LSDFO
MIC O
RA O
A6
A4
ALT
GND
SB
RA I
CV
MIC I
TC1
TC1 : Transmit lock voltage adjustment
TC2 : Receive lock voltage adjustment
CV : Lock voltage adjustment terminal.
Fig. 1 Adjustment points
26
ADJUSTMENT
SP MUTE
RSSI
VR1
CV
RESET
BPF
X57-672 A/2
Foil side
TC2
ANT
Frequency and signalling
The set 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 actual operation.
Frequency (MHz) K, M type
Channel No. RX Frequency
1 155.05000
2 136.05000
3 173.95000
4 155.00000
5 155.20000
6 155.40000
7~16
Signalling
Signalling No. RX
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 159D
10 None
2 Tone:
11 A:321.7Hz
B:928.1Hz
12 None
13 None
14 MSK Code
• 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
8W dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
Adjustment Frequency
TEST CH RX
Center 155.050MHz
Low 136.050MHz
High 173.950MHz
Low' 145.550MHz
High' 164.550MHz
155.000MHz
155.200MHz
155.400MHz
TX Frequency
155.10000
136.10000
173.90000
155.00000
155.20000
155.40000
TX
None
100Hz Square Wave
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 254.1Hz
DQT D023N
DQT D754I
DTMF 159D
DTMF tone 9
2 Tone:
A:321.7Hz
B:928.1Hz
Single Tone:1000Hz
MSK
MSK Code
K,M
TX
155.000MHz
136.000MHz
174.000MHz
145.500MHz
164.500MHz
155.000MHz
155.200MHz
155.400MHz