Icom IC-821H Service Manual page 27

TRANSMITTER ADJUSTMENT (CONTINUED)
ADJUSTMENT
ADJUSTMENT CONDITIONS
TONE 1
• MAIN band freq.
: Any
BURST
• Applied no audio signals to the
(EUR
microphone connector.
version)
• Transmitting by the [TONE] switch.
LO LEAK 1 • MAIN band freq'. : 144.00000 MHz
• Mode
:FM
• Transmitting
2
• MAIN band freq.
[EUR] version 146.00000 MHz
[USA]. [AUS] versions 148.00000 MHz
• Transmitting
CARRIER 1
• MAIN band freq.
: Any
SUPPRES- • Mode
: USB and LSB
SION
• Applied no audio signals to the
microphone connector.
• Transmitting
-MAIN UNIT
FM deviation
[R41
adjustment
R29
Carrier
~R
156
suppression
adjustment
R158
FM, CW drive
level adjustment
[
R230
R136
FM, CW drive
J23
level check point
- RF-A UNIT
MEASUREMENT
UNIT LOCATION
Rear Connect an FM
panel deviation meter to the
transmitting band's
antenna connector
through an attenuator.
Rear Connect a spectrum
panle analyzer to the
[VHF ANT] connector
through an attenuator.
Rear Connect a spectrum
panel analyzer to the
transmitting band's
antenna connector
through an attenuator.
ADJUSTMENT
VALUE
POINT
UNIT ADJUST
±3.5 kHz MAIN R64
Minimum level on RF-A C37
the following
frequency:
Displayed freq.
R4
minus 10.85 MHz
(Less than - 60 dB)
Minimum level MAIN R156, R158
(Less than -40 dB)
R64
Subaudible tone
adjustment
(USA, AUS version)
Tone burst
adjustment
(EUR version)
R66
T-squelch tone
adjustment
(EUR version)
R92
UHF output power
adjustment
R87 ]
ICAPC
R80
adjustment
LO leak
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R4 ]
adjustment
C37
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