Download Print this page

Kenwood TK-3401D Service Manual page 19

Uhf digital transceiver
Hide thumbs Also See for TK-3401D:

Advertisement

ANT cable(E30-3418-05)
Modify the cable as shown below.
Solder the ANT cable to the ANT terminal on the TX-RX unit.
ANT cable
4.2
Frequency and Signaling
The transceiver has been adjusted for the frequencies shown in
the following table. When required, readjust them following the
adjustment procedure to obtain the frequencies you want in ac-
tual operation.
Test frequency
CH
Zone 1 (MHz)
1
446.00625
2
446.01875
3
446.03125
4
446.04375
5
446.05625
6
446.06875
7
446.08125
8
446.09375
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
Cut
TX-RX unit
When the TEST cable is applied,
solder is deleted.
GND
ANT
Attention: After repairs or
adjustments are completed,
please do not forget to solder.
Zone 2 (MHz)
446.103125
446.109375
446.115625
446.121875
446.128125
446.134375
446.140625
446.146875
446.153125
446.159375
446.165625
446.171875
446.178125
446.184375
446.190625
446.196875
Analog mode signaling
No.
Receive
1
None
2
None
3
QT 67.0 Hz
4
QT 151.4 Hz
5
QT 210.7 Hz
6
QT 254.1 Hz
7
DQT D023N
8
DQT D754I
dPMR mode signaling
No.
Receive
1
None
2
None
3
None
4
Preamble+FS1+PN9 MOD setup
6
None
7
None
8
Tone Pattern(1031Hz) FS2+CCH+1031Hz Tone Pattern
9
Silence Pattern
10
Audio Test Pattern
4.3
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 dis-
tortion meter or a SINAD measurement meter at all times during
tuning.
Reference level adjustments frequency
RX (MHz)
446.06875
4.4
Adjustment Points
TX-RX UNIT
Component side view
CVIN
Transmit
None
100 Hz Square Wave
QT 67.0 Hz
QT 151.4 Hz
QT 210.7 Hz
QT 254.1 Hz
DQT D023N
DQT D754I
Transmit
Preamble+FS1+
Maximum Deviation Pattern
Preamble+FS1+PN9
Maximum Deviation Pattern
1/3 Deviation Pattern
Preamble+FS1+0x222222...
(CC=1, Common ID=255)
FS2+CCH+Silence Pattern
(CC=1, Common ID=255)
FS2+CCH+Audio Test Pattern
(CC=1, Common ID=255)
TX (MHz)
446.128125
(No.RA012<Rev.001>)1-19

Hide quick links:

Advertisement

loading