Adjustment; Test Mode; Frequency And Signalling; Transceiver Tuning - Kenwood 762G Service Manual

Test Mode (TK-760G Only)
Test Mode Operating Features
This transceiver has a test mode. To enter test mode,
press [SCN] key and turn power on. Hold [SCN] key un-
til test channel No. and test signalling No. appears on
LCD. Test mode can be inhibited by programming. To exit
test mode, switch the power on again. The following func-
tions are available in test mode.
• Controls
[PTT] Used when making a transmission.
[MON] Monitor on and off.
[SCN] Sets to the tuning mode.
[A] Function on.
[D/A] RF power high and low.
[ ] Changes signalling.
[ ] Changes wide and narrow
[CH / ] Changes channel.
[Volume / ] Volume up/down.
• LCD indicator
"SCN" Unused.
"AUX" Lights at RF power low.
"MON" Lights at monitor on.
"Right side dot" Lights at narrow.
• LED indicator
Red LED Lights during transmission.
Green LED Lights when there is a carrier.

Frequency and Signalling

The set has been adjusted for the frequencies shown in
the following table. When required, re-adjust them follow-
ing the adjustment procedure to obtain the frequencies you
want in actual operation.
• Frequency (MHz)
Channel TK-760G/762G (K) TK-760G/762G (K2)
No. RX TX
1 (Center) 161.050 161.100 149.050 149.100 160.050 160.100
2 (Low) 148.050 148.100 136.050 136.100 146.050 146.100
3 (High) 173.950 173.900 161.950 161.900 173.950 173.900
4 161.000 161.000 149.000 149.000 160.000 160.000
5 161.200 161.200 149.200 149.200 160.200 160.200
6 161.400 161.400 149.400 149.400 160.400 160.400
7~16 – –

ADJUSTMENT

TK-760G (M)
RX TX RX TX
– – – –
TK-760G/762G
• Signalling
Signalling No. RX
1 None
2 None
3 QT 67.0Hz
4 QT 151.4Hz
5 QT 210.7Hz
6 QT 250.3Hz
7 DQT D023N
8 DQT D754I
9 DTMF DEC, (159D)
10 None
11 2-tone 321.7/928.1Hz
12 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 turned, the unit must be
connected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
4 dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.

• Transceiver tuning

(To place transceiver in tuning mode)
Channel appears on LCD. Set channel according to tun-
ing requirements.
LCD display (Test mode)
–
1
Channel No.
Press [SCN], now in tuning mode. Use [D/A] button to
write tuning data through tuning modes, and [CH
adjust tuning requirements (1 to 256 appears on LCD).
Use [ ] button to select the adjustment item through
tuning modes. Use [A] button to adjust 3-point or 5-point
tuning, and use [ ] button to switch between wide/narrow.
LCD display (Tuning mode)
Adjustment item
F R E Q . . . . .
Point tuning indicator
TX
None
100Hz square
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 250.3Hz
DQT D023N
DQT D754I
DTMF ENC, (159D)
DTMF tone (9)
None
Single tone 1200Hz
1
Signalling No.
/ ] to
Wide/Narrow indicator
Off : Wide
On : Narrow
1 .
Adjustment
(1~256)
45