49
ADJUSTMENT
Measurement
Test-
equipment
Unit
Terminal
Adjustment
Unit
Parts
Method
Specifications/Remarks
Condition
Item
TK-390
9. Squelch
1) Set panel test mode
SSG
Panel
ANT
Panel
Top1/
Adjust to point of
adjustment
CH No. : 3
Top2
opening squelch
(narrow)
Signalling No. : 1
AF VTVM
Side
Universal
Select SQ O
✽ ✽ ✽
Oscilloscope
in panel tuning mode
Distortion
Turn the toggle SW to the
meter
right (narrow)
Audio
SSG output : 3dB below to
analyzer
12dB SINAD level
10. Squelch
1) Set panel test mode
Check
Squelch must be opened
check
CH No. : 3
(wide)
Signalling No. : 1
SSG output : –118dBm/0.28
µ
V
2) SSG output : –127dBm/0.1
µ
V
Squelch must be closed
11. Squelch
1) Set panel test mode
Check
Squelch must be opened
check
CH No. : 3
(narrow)
Signalling No. : 1
Turn the toggle SW to the
right (narrow)
SSG output : –118dBm
2) SSG output : –127dBm
Squelch must be closed
Adjustment Point
■
Component side
■
Foil side
SENS. B
IC600
SELF
TP5
TP4
E
TP1
TP2
TP6
E
E
X600
IC603
IC607
TP7 E
TP9
TP8
E
TP3
E
E
L210
L205
IC10
X1
IC406
IC414