TK-3178
(
L
)
48
ADJUSTMENT
Item
Condition
Measurement
Adjustment
Specifi cations / Remarks
Test-
equipment
Unit
Terminal
Unit
Parts
Method
4. Low
Transmit
Power
adjust
1) Adj item: [LPWR]
Adjust:
[
✳✳✳
]
2) Adj item: [L LPWR]
→
[C LPWR]
→
[H LPWR]
Adjust:
[
✳✳✳
]
PTT:
ON
Power meter
Ammeter
Panel
ANT
Panel
Selector
knob
1.0W
±0.1W
0.9A or less
5. Low
Transmit
Power
check
[Panel test mode]
1) CH-Sig: 1-1
Set low power (Push [S])
PTT:
ON
Check
0.7~1.4W
0.9A or less
2) CH-Sig: 2-1
PTT:
ON
3) CH-Sig: 3-1
PTT:
ON
6. DQT
Balance
adjust
•
Narrow
1) Adj item: [n BAL]
Adjust:
[
✳✳✳
]
Deviation meter fi lter
LPF: 3kHz
HPF: OFF
2) Adj item: [nL BAL]
→
[nC BAL]
→
[nH BAL]
Adjust:
[
✳✳✳
]
PTT:
ON
Deviation
meter
Oscilloscope
AG
AF VTVM
Panel
ANT
SP/MIC
Panel
Selector
knob
Make the demodu-
lation waves into
square waves.
These 2 peaks to
the same level
7. Maximum
Deviation
adjust
•
Narrow
1) Adj item: [n DEV]
Adjust:
[
✳✳✳
]
AG: 1kHz/150mV at MIC
terminal
Deviation meter fi lter
LPF: 15kHz
HPF: OFF
2) Adj item: [nL DEV]
→
[nC DEV]
→
[nH DEV]
Adjust: [
✳✳✳
]
PTT:
ON
2.15kHz
(According to the
, –)
±100Hz
• Wide
3) Adj item: [w DEV]
Adjust:
[
✳✳✳
]
PTT:
ON
4.35kHz
(According to the
, –)
±100Hz
8. MIC
sensitivity
check
[Panel test mode]
1) CH-Sig: 1-1
AG: 1kHz/15.0mV at MIC
terminal
PTT:
ON
Check
1.3~1.9kHz (Narrow)
2.5~3.7kHz (Wide)
9. QT Fine
Deviation
adjust
•
Narrow
1) Remove the panel tuning
cable assembly from the
universal connector.
Adj item: [n QT]
Adjust:
[
✳✳✳
]
Deviation meter fi lter
LPF: 3kHz
HPF: OFF
PTT:
ON
Power meter
Deviation
meter
Oscilloscope
AG
AF VTVM
Panel
Selector
knob
0.35kHz
±40Hz
• Wide
2) Adj item: [w QT]
Adjust:
[
✳✳✳
]
PTT:
ON
0.75kHz
±40Hz
