Receiver Adjustment; Transmitter Adjustment - Icom IC-2000 Service Manual

4-1
PLL
AND TRANSMITTER ADJUSTMENT
ADJUSTMENT
ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION UNIT
ADJUST
LCX2K
VOLTAGE
1
• Displayed frequency;
145.000
MHz
• Receiving
MAIN
Connect
the
digital
multi-meter or
osciiioscope
to
CP-A.
2.0
V
MAIN
L22
REFERENCE
FREQUENCY
1
• Displayed frequency: 145.000
MHz
• Transmitting
Rear
panel
Loosely couple the
frequency counter
to
the
antenna
connector.
145.0000
MHz
MAIN
OUTPUT
POWER
1
• Displayed frequency:
145.000
MHz
(EUR.
THA, KOR)
146.000
MHz
(ITA,
USA, AUS, SEA)
•
Transmitting
•
Power: High
Rear
panel
Connect
the
RF
power
meter
to
the
antenna connector.
50
W
(IC-2000H)
10
W
(iC-2000)
MAIN R62
FM
DEVIATION
1
•
Displayed frequency:
145.000
MHz
(EUR,
THA. KOR)
146.000
MHz
(ITA,
USA, AUS, SEA)
• Apply an
AF
signal to
the [MIC]
jack.
1
kHz/20
mV
•
Set the
FM
deviation
meter
as;
HPF
:
50 Hz
LPF
:
20 kHz
De-emphasis:
OFF
Detector
:
(P-P)/2
• Transmitting
Rear
panel
Connect
the
FM
deviation
meter
to the
antenna
connector
via
the
attenuator.
±4.8 kHz
MAIN R115
CTCSS
TONE
DEVIATION
1
• Displayed frequency;
145.000
MHz
(EUR,
THA, KOR)
146.000
MHz
(ITA,
USA, AUS, SEA)
•
No
signal applied to the [MIC] jack.
•
CTCSS
tone frequency: 88.5
Hz
• Set the
FM
deviation
meter
as:
HPF
:
OFF
LPF
:
20 kHz
De-emphasis:
OFF
Detector
;
(P-P)/2
Rear
panel
Connect
the
FM
deviation
meter
to
the antenna
connector
via
the
attenuator.
±0.8 kHz
MAIN
R168
4-2
RECEIVER
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION
ADJUST
SENSITIVITY
1
• Displayed frequency;
145.000
MHz
(EUR,
THA,
KOR)
146.000
MHz
(ITA,
USA, AUS. SEA)
•
Connect
the
SSG
to
the
antenna
connector
and
set as:
Level
:
1 .0
pV*
(-107 dBm)
Deviation
:
±3.5 kHz
Modulation:
1
kHz
• Turn the
R146
to
maximum
level.
• Receiving
MAIN
Connect
the
voltmeter
to
the
CP-B.
Maximum DC
voltage Adjust
in
sequence.
L18, L17,
L26,
L16
S-METER
1
•
Displayed frequency:
145.000
MHz
(EUR,
THA, KOR)
146.000
MHz
(ITA,
USA, AUS, SEA)
• Connect the
SSG
to the
antenna
connector
and
set as:
Level
:
1.0pV*(-107dBm)
Deviation
;
±
3.5
kHz
Modulation:
1
kHz
•
Receiving
Function
display
S/RF
indicator
S3
(4
dots)
mamm
MAIN R146
-This output
level of
the standard signal
generator <SSG)
is
indicated
as SSG's open
circuit.
4-1