ADJUSTMENT
Measurement
Test-
equipment
Unit
Terminal
Adjustment
Unit
Parts
Method
Specifications/Remarks
Condition
Item
42
TK-390
Common Section
1. Varicap shift
1) Set panel tuning mode
DC VTVM TX-RX
TP2
Panel
Top1/
–3V
±
0.1V
voltage
Push Side2 to select
Top2
Mid
VSWM
✽ ✽
High
2) Push Side2 to select
–6V
±
0.1V
VSWH
✽ ✽ ✽
2. Voltage change 1) Set panel tuning mode
TP1
4.15V
±
0.05V
frequency
Push Side2 to select
Low–Mid
✽ ✽ ✽
.
✽ ✽ ✽
RX
r1
TX
2) Push Side2 to select
4.15V
±
0.05V
✽ ✽ ✽
.
✽ ✽ ✽
t1
Mid–Hi
3) Push Side2 to select
4.15V
±
0.05V
RX
✽ ✽ ✽
.
✽ ✽ ✽
r2
TX
4) Push Side2 to select
4.15V
±
0.05V
✽ ✽ ✽
.
✽ ✽ ✽
t2
Measurement
Test-
equipment
Unit
Terminal
Adjustment
Unit
Parts
Method
Specifications/Remarks
Condition
Item
Transmitter Section
1. Frequency
1) Set panel test mode
Power meter Panel
ANT
Panel
Top1/
470.000MHz
±
50Hz
adjustment
CH No. : 1
f. counter
Top2
Signalling No. : 1
Select FRQ
✽ ✽ ✽
in panel tuning mode
When the TCXO (X1) is replaced, perform the frequency tune
PTT : ON
in PC tuning mode from the FPU menu.
2. Maximum
1) Set panel test mode
Power meter Panel
ANT
Check
4.0W or more
power
CH No. : 3
check
Signalling No. : 1
Ammeter
BATT terminal voltage : 7.5V
Select POW 255
in panel tuning mode
PTT : ON
3. TX high
1) Set panel test mode
Panel
Top1/
4.20W
±
0.1W
power
CH No. : 3
Top2
2.3A or less
adjustment
Signalling No. : 1
Select POW
✽ ✽ ✽
in tuning mode
Push Orange to 3 point
adjustment mode
Select POW
✽ ✽ ✽
L
PTT : ON
2) Push Side2 to select
POW
✽ ✽ ✽
M
PTT : ON
3) Push Side2 to select
POW
✽ ✽ ✽
H
PTT : ON
Caution :
When adjusting transmit power and sensitivity, connect the cable to the SMA antenna connector on
the top panel. At this time, use the antenna-less type jig connector (E30-3287-08) in the universal connector.