Adjustment - Kenwood KDS-100 Service Manual

KDS-100 "Test Mode" Setting Method
Connect the KDS-100 to a PC and enable KDS-100 "Test
Mode" with the FPU (KPG-71D).
1) Select "Optional Features" from the KPD-71D "Edit"
menu.
2) Check the " Test" box for "COM/Mode".
✓
When this state is written into the KDS-100, the Test
Mode operation is enabled.
MSK Modulation Adjustment
Adjust deviation as follows: Wide: 3kHz and Narrow:
1.5kHz.
■ TK- 80 series
*
For information on the adjustment method, see the Ser-
vice Manual for the TK- * 80 series.
■ TK- 60G series
*
1) Connect a transceiver and a PC to the KDS-100, and se-
lect "Test Mode" from "Program" on the FPU (KPG-71D)
menu.
2) Adjust the "Output Level" DIGIT value on the "MSK"
screen.
3) When you click on "OK" on the PC screen, the adjust-
ment value is written into the KDS-100 memory.
MSK Detection Input Level Adjustment
(Same as for the TK- 80 series and TK-
*
Set the input voltage at pin 2 of the CODEC IC (IC20) of
the KDS-100 to 1000mVp-p.
1) Modulate SSG with a modulation frequency 1200Hz (or
1000Hz) (Wide: 3kHz, Narrow: 1.5kHz) and input it to the
transceiver.
2) Measure the KDS-100 DI voltage (DI: CN5 pin 3, trans-
ceiver detection output voltage) with a VTVM.
3) Set the "Input Level" DIGIT value according to the fol-
lowing conversion table on the "MSK" screen in "Test
Mode" so that the measured voltage (mVrms) is the
CODEC IC input voltage (1000mV).
4) When you click on "OK" on the PC screen, the adjust-
ment value is written into the KDS-100 memory.

ADJUSTMENT

DI input level
(mVrms)
140
130
120
60G series)
*
110
100
90
80
70
60
50
40
30
20
10
0
Adjustment
digit
50 129
100 64
200 33
300 21
400 16
500 13
600 11
700 9
800 8
900 7
1000 6
1100 6
1200 6
Conversion table
DI input VS DIGIT
129
64
33
21
16
13
11
50 200 400 600
DI input level (mVrms)
KDS-100
Codec IC (IC20)
input level (mVp-p)
1000
9
8
7
6 6
6
800 1000 1200
5