Transmitter And Receiver Adjustments - Icom IC-2100H Service Manual

4-3
TRANSMITTER
AND
RECEIVER
ADJUSTMENTS
The
receiver
adjustments
must be performed
after
PLL
ADJUSTMENTS.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION UNIT
ADJUST
OUTPUT
POWER
1
•
Displayed frequency
:
145.000
MHz
[EUR. TPE,
THA]
146.000
MHz
[ITA.
USA. SEA,
LA]
•
Output
power
:
High
•
Transmitting
Rear
Panel
Connect
the
RF
power meter
to
the
antenna connector.
10
W
[THA]
25
W
[TPE]
55
W
[other]
MAIN
R49
FM
DEVIATION
1
•
Displayed frequency
:
145.000
MHz
[EUR, TPE,
THA]
146.000
MHz
[ITA,
USA. SEA,
LA]
•
Output
power
:
Low
•
Connect an audio generator
to
the [MIC]
connector
and
set as:
1
kHz/
50
mV
[USA]
1
kHz/
20
mV
[other]
•TONE
:OFF
•
Set an
FM
deviation
meter
as:
HPF
:
50
Hz
LPF
:20 kHz
De-emphasis
:
OFF
Detector
:
(P"P)/2
• Transmitting
Rear
Panel
Connect an
FM
deviation
meter
to
the
antenna con-
nector through an
attenuator.
±4.8
kHz
MAIN R86
2
•
IF
bandwidth
:
Narrow
[EUR,
ITA]
only
• Transmitting
±2.0-±3.0
kHz
Verify
SENSITIVITY
1
•
Displayed frequency
:
145.000
MHz
[EUR, TPE, THA]
146.000
MHz
[ITA,
USA, SEA,
LA]
•
Connect an
SSG
to
the
antenna
connector
and
set as:
Level
:
32 pV*
(~77
dBm)
Deviation
:
±3.5
kHz
Modulation
:
1
kHz
•
Receiving
MAIN
Connect a
digital
multimeter or
oscil-
loscope to
check
point
CP2.
Maximum
voltage
MAIN
Adjust
in
sequence
repeated-
ly.
L24,
L26,
L28,
L29
SQUELCH/
S-METER
(SQUELCH)
1
•
Turn
into
squelch/S-meter setting
mode.
Connect a JIG
to
the [MIC]
connector, then
turn
power
ON,
•
Displayed frequency
:
145.000
MHz
[EUR, TPE,
THA]
146.000
MHz
[ITA,
USA, SEA,
LA]
•
R163
;
Max. clockwise
•
Connect an
SSG
to
the
antenna
connector
and
set as:
Level
:
0.071
pV*
(-130
dBm)
Deviation
:
±3.5
kHz
Modulation
:
1
kHz
•
Receiving
Speaker At the point
where
the signal just
appears.
MAIN R163
(S-METER) 2
•
Set
an
SSG
as
:
Level
:
1
.0
pV*
(-107
dBm)
Deviation
:
±3.5
kHz
Modulation
:
1
kHz
•
Receiving
Display
S/RF
indicator
Push and
hold the
[S.MW]
key, or
push
the
[MW] key on
the
HM-98.
• Verify that
S-meter
shows S3
(4 dots).
*Thls output
level of
the
standard
signal
generator
(SSG)
is
indicated
as
SSG's open
circuit.
4-3
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