Kenwood TK-378G, Service Manual

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TK-378G
13
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 250.3Hz QT 250.3Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 DTMF DEC, (159D) DTMF ENC, (159D)
10 None DTMF tone 9
11 2 tone 321.7/928.1Hz None
12 Single tone 1200Hz Single tone 1200Hz
• 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 distortion meter or a SINAD measurement meter at all
times during tuning.
■
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.
■
频率和信令
为下表所列的频率调整设定。需要时，按照调整步骤重新调
整以获得用户在实际操作中想要的频率。
信令
信令号码 接收 发射
1 无 无
2 无 100Hz 方波
3 QT 67.0Hz QT 67.0Hz
4 QT 151.4Hz QT 151.4Hz
5 QT 210.7Hz QT 210.7Hz
6 QT 250.3Hz QT 250.3Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 DTMF DEC,(159D) DTMF ENC,(159D)
10 无 DTMF 音频 9
11 双音信令 321.7/928.1Hz 无
12 单音信令 1200Hz 单音信令 1200Hz
•
调整手持机的准备
在进行调整手持机之前，将主机与电源连接。
无论何时调整发射部分，主机必须连接到合适的假负载（或
功率仪）。
在整个调整过程中，扬声器输出必须经过 8 Ω假负载并被连
接到一个交流电压表和一个音频失真测试仪或一个 SINAD 测量
仪。
ADJUSTMENT /
调整
450-470(MHz)
TEST Ch RX frequency (MHz) TX frequency (MHz)
Low 450.05000 450.00000
Low’ 455.05000 455.00000
Center 460.05000 460.00000
High’ 465.05000 465.00000
High 469.95000 470.00000
Adjustment Frequency (M)
450-470(MHz)
测试信道 接收频率（ MHz ） 发射频率（ MHz ）
Low 450.05000 450.00000
Low ’ 455.05000 455.00000
Center 460.05000 460.00000
High ’ 465.05000 465.00000
High 469.95000 470.00000
面板调谐模式 (M)
400-420(MHz)
TEST Ch RX frequency (MHz) TX frequency (MHz)
Low 400.05000 400.00000
Low’ 405.05000 405.00000
Center 410.05000 410.00000
High’ 415.05000 415.00000
High 419.95000 420.00000
Adjustment Frequency (M4)
M 458.00000MHz
M4 410.00000MHz
Adjustment Frequency for EXT CTCSS input
400-420(MHz)
测试信道 接收频率（ MHz ） 发射频率（ MHz ）
Low 400.05000 400.00000
Low ’ 405.05000 405.00000
Center 410.05000 410.00000
High ’
415.05000 415.00000
High 419.95000 420.00000
面板调谐模式 (M4)
M 458.00000MHz
M4 410.00000MHz
Frequency (MHz)
M M4
Channel No. RX TX RX TX
1 460. 05000 460. 00000 410.05000 410.00000
2 450. 05000 450. 00000 400.05000 400.00000
3 469. 95000 470. 00000 419.95000 420.00000
4 460. 00000 460. 00000 410.00000 410.00000
5 460. 20000 460. 20000 410.20000 410.20000
6 460. 40000 460. 40000 410.40000 410.40000
频率（ MHz ）
M M4
信道号码 RX TX RX TX
1
460. 05000 460. 00000 410.05000 410.00000
2 450. 05000 450. 00000 400.05000 400.00000
3 469. 95000 470. 00000 419.95000 420.00000
4 460. 00000 460. 00000 410.00000 410.00000
5 460. 20000 460. 20000 410.20000 410.20000
6 460. 40000 460. 40000 410.40000 410.40000
EXT CTCSS 输入的调谐频率