Kenwood TK-260N Service Manual page 39

TK-260G/(N)/270G/(N)
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) (N)E2 type
Channel No. RX Frequency
1 143. 05000
2 136. 05000
3 149. 95000
4 143. 00000
5 143. 20000
6 143. 40000
7~16
Frequency (MHz) E, (N)E, (N)T type
Channel No. RX Frequency
1 160. 05000
2 146. 05000
3 173. 95000
4 160. 00000
5 160. 20000
6 160. 40000
7~16
Signalling
Signalling No.
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 ENC
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 tuned, the unit must be
connected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
8Ω dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
38
ADJUSTMENT
TX Frequency
143. 00000
136. 00000
150. 00000
143. 02500
143. 20000
143. 40000
TX Frequency
160. 00000
146. 00000
174. 00000
160. 02500
160. 20000
160. 40000
RX TX
None
100Hz square wave
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 250.3Hz
DQT D023N
DQT D754I
DTMF ENC, (159D)
DTMF tone 9
Single tone 1200Hz
• Transceiver tuning
(To place the transceiver in tuning mode)
Channel appears on the LCD. Set the channel according to
the tuning requirements.
LCD display (Test mode)
1
channel No.
°
Press [ ], to enter tuning mode. Use the [2 ] key to write
tuning data through the tuning modes, and the channel selector
knob to adjust the tuning requirements (1 to 256 appears on
LCD).
Use the [3] key to select the adjustment item through the
tuning modes. Use the [ ] key to adjust 3 or 5 point tuning,
and use the [Side1] key to switch between Wide/Narrow.
LCD display (Tuning mode)
H.P.O.W. .
Adjustment item
Adjustment (1~256)
Point tuning indicator
Panel Tuning Mode (N)E2 type
TEST Ch RX frequency (MHz)
Low 136.05000
Low' 139.55000
Center 143.05000
High' 146.55000
High 149.95000
Panel Tuning Mode E, (N)E, (N)T type
TEST Ch RX frequency (MHz)
Low 146.05000
Low' 153.05000
Center 160.05000
High' 167.05000
High 173.95000
1
Signalling No.
Wide/Narrow indicator
Wide 5K/Wide 4K indicator
ON OFF
1.
E Wide 4K Wide 5K
(N)E – Narrow
(N)E2 – Narrow
(N)T – Narrow
136-150(MHz)
TX frequency (MHz)
136.00000
139.50000
143.00000
146.50000
150.00000
146-174(MHz)
TX frequency (MHz)
146.00000
153.00000
160.00000
167.00000
174.00000