Filter
Top Products
TK-2160
26
■ 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 TX Frequency
1 155.05000 155.10000
2 136.05000 136.10000
3 173.95000 173.90000
4 155.00000 155.00000
5 155.20000 155.20000
6 155.40000 155.40000
7~16
Signalling
Signalling No. RX TX
1 None None
2 None 100Hz Square Wave
3 QT 67.0Hz QT 67.0Hz
4 QT 151.4Hz QT 151.4Hz
5 QT 210.7Hz QT 210.7Hz
6 QT 254.1Hz QT 254.1Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 DTMF 159D DTMF 159D
10 None DTMF tone 9
2 Tone: 2 Tone:
11
A:321.7Hz A:321.7Hz
B:928.1Hz B:928.1Hz
12 None Single Tone:1000Hz
13 None MSK
14 MSK Code MSK Code
Adjustment Frequency
K,M
TEST CH RX TX
Center 155.050MHz 155.000MHz
Low 136.050MHz 136.000MHz
High 173.950MHz 174.000MHz
Low’ 145.550MHz 145.500MHz
High’ 164.550MHz 164.500MHz
155.000MHz 155.000MHz
155.200MHz 155.200MHz
155.400MHz 155.400MHz
• 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
Adjustment points TX-RX unit (X57-672)
Component side view
Foil Side View
VR1 : Frequency adjustment
RSSI : Band-pass wave form test point
TC1 : Transmit lock voltage adjustment
TC2 : Receive lock voltage adjustment
CV : Lock voltage adjustment terminal.
SP MUTE
RESET
VR1
DET
BATT+
ANT
TXD
SP–
SP+
PTTI
(RXD)
PTTO
GND
AUX
PTT
S-1
S-2
RSSI
CV
X57-672 A/2
Component side
TC1
TC2
ALT
CV
A4
A3
A4
A1
MIC O
RA O
A6
A4
GND
SB
RA I
MIC I
5C
DEO
TXAFI
PTT
LSDFO
ALT2
BPF
ANT
X57-672 A/2
Foil side
Fig. 1 Adjustment points