TM-281A
22
No.
Adjustment Item
Adjustment
Frequency Point
Display
Note
Transmit
(MHz)
Receive
(MHz)
Signaling
1
Frequency Tune
Center
155.100
155.050
2
TX High Power
Low
“H” icon appear
136.100
136.050
Low’
142.100
142.050
Center
150.100
150.050
High’
156.100
156.050
High
173.900
173.950
3
TX Low Power
Low
“L” icon appear
136.100
136.050
Low’
142.100
142.050
Center
150.100
150.050
High’
156.100
156.050
High
173.900
173.950
4
DCS Balance
Low
“DCS” icon appear
136.100
136.050
DCS : 023N
Center
155.100
155.050
High
173.900
173.950
5
DCS Balance (Narrow)
Center
“DCS” and “N” icon appear
155.100
155.050
6
Max Deviation
Low
136.100
136.050
Center
155.100
155.050
High
173.900
173.950
7
Max Deviation (Narrow)
Center
“N” icon appear
155.100
155.050
8
CTCSS Fine Deviation
Low
“CT” icon appear
136.100
136.050
CTCSS : 88.5Hz
Center
155.100
155.050
High
173.900
173.950
9
CTCSS Fine Deviation (Narrow)
Center
“CT” and “N” icon appear
155.100
155.050
10
DCS Fine Deviation
Low
“DCS” icon appear
136.100
136.050
DCS : 023N
Center
155.100
155.050
High
173.900
173.950
11
DCS Fine Deviation (Narrow)
Center
“DCS” and “N” icons appear
155.100
155.050
12
DTMF Fine Deviation
Center
155.100
155.050
DTMF : 9
13
DTMF Fine Deviation (Narrow)
Center
“N” icon appear
155.100
155.050
14
Band Pass Tuning
Low
“BUSY” icon appear
136.100
136.050
Center
155.100
155.050
High
173.900
173.950
15
Squelch Tight
Low
136.100
136.050
Center
146.100
146.050
High
173.900
173.950
16
Squelch Tight (Narrow)
Center
“N” icon appear
146.100
146.050
17
Squelch Open
Low
136.100
136.050
Center
146.100
146.050
High
173.900
173.950
18
Squelch Open (Narrow)
Center
“N” icon appear
146.100
146.050
19
S-Meter S1 Level
Center
146.100
146.050
20
S-Meter Full Level
Center
146.100
146.050
Table 1 Adjustment items, display and test frequency list
ADJUSTMENT