Icom IC-2820H Service Manual page 20
Dual band fm transcever
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Also See for IC-2820H:
- Instruction manual (164 pages) ,
- Service manual (56 pages) ,
- Basic operations (4 pages)
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¤ DEVIATION ADJUSTMENT
• CONNECTION FOR MODULATION ADJUSTMENTS
MODULATION ANALYZER
<SETTING>
HPF
: OFF
LPF
: 20 kHz
De-emphasis : OFF
Detector
: (P-P)/2
ADJUSTMENT ITEM
144 MHz
(Band
(FM)
BAND
Low)
[L FMD]
DEVIATION
(FM-N)
(Left Band)
[L FMD]
(Band
(FM)
Center)
[L FMD]
(FM-N)
[L FMD]
(Band
(FM)
High)
[L FMD]
(FM-N)
[L FMD]
144 MHz
(Band
(FM)
BAND
Low)
[L FMB]
MODULATION
(FM-N)
BALANCE
[L FMB]
(Left Band)
(Band
(FM)
Center)
[L FMB]
(FM-N)
[L FMB]
(Band
(FM)
High)
[L FMB]
(FM-N)
[L FMB]
144 MHz BAND
(FM)
DTCS MODULATION
[L MDT]
(Left Band)
(FM-N)
[L MDT]
144 MHz
(FM)
CTCSS MODULATION
[L MCT]
(Left Band)
(FM-N)
[L MCT]
All manuals and user guides at all-guides.com
(0.1–1 GHz)
ATTENUATOR
(40 dB/100 W)
OSCILLOSCOPE
(DC to 10 kHz)
ADJUSTMENT CONDITIONS
1
•
Connect a Modulation Analyzer to
the antenna connector (J1) through
an attenuator.
2
•
Connect an Audio Generator to the
JIG cable (See the page 5-1 for the
connector and setting details).
3
•
Transmitting
4
5
6
1
•
Connect a Modulation Analyzer to
the antenna connector (J1) through
an attenuator.
2
•
Connect an oscilloscope to the de-
tector terminal of the Modulation
Analyzer.
3
•
No audio signals are applied to the
JIG cable (See the page 5-1).
4
•
Transmitting
5
6
1
•
Connect a Modulation Analyzer to
the antenna connector (J1) through
an attenuator.
2
•
No audio signals are applied to the
JIG cable (See the page 5-1).
•
Transmitting
1
•
Connect a Modulation Analyzer to
the antenna connector (J1) through
an attenuator.
2
•
No audio signals are applied to the
JIG cable (See the page 5-1).
•
Transmitting
5 - 4
To J1
DC power supply
(13.8 V/20 A)
Fuses
20 A
OPERATION
Rotate the right band's [DIAL] to
adjust the deviation, then push
the right band's [MAIN•BAND]
key during transmit.
Rotate the right band's [DIAL] to
adjust the wave form, then push
the right band's [MAIN•BAND]
key during transmit.
Rotate the right band's [DIAL] to
adjust the deviation, then push
the right band's [MAIN•BAND]
key.
Rotate the right band's [DIAL] to
adjust the deviation, then push
the right band's [MAIN•BAND]
key .
IC-2820H
−
⊕
−
Black
⊕
Red
VALUE
±4.2 kHz
±2.1 kHz
±4.2 kHz
±2.1 kHz
±4.2 kHz
±2.1 kHz
(Square
Wave form)
±0.8 kHz
±0.75 kHz
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