Deviation Adjustments - Icom IC-92AD Service Manual

5-4 DEVIATION ADJUSTMENTS

Select an adjustment item using [2] / [8] keys, then set the adjustment value as specifi ed using [DIAL].
ADJUSTMENT
FM DEVIATION 0 • Supply voltage : 7.4 V
[PREPARATION]
(@1 kHz) 1 • Displayed freq. : "
[VHF (BAND LOW)]
[VHF (BAND HIGH)] 2 • Displayed freq. : "(2)"
[UHF (BAND LOW)] 3 • Displayed freq. : "(3)"
[UHF (BAND HIGH)] 4 • Displayed freq. : "(5)"
(@300 Hz) 5 • Channel
[VHF (BAND LOW)]
[VHF (BAND HIGH)] 6 • Displayed freq. : "(2)"
[UHF (BAND LOW)] 7 • Displayed freq. : "(3)"
[UHF (BAND HIGH)] 8 • Displayed freq. : "(5)"
[USA]
[SEA], [CHN], [EXP], [CAN]
MODULATION ANALYZER
(0.1–500 MHz)
SETTING
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P-P)/2
ADJUSTMENT CONDITION
• Transmitting
• Transmitting
• Transmitting
• Transmitting
: "
• Transmitting
• Transmitting
• Transmitting
• Transmitting
(1) (2) (3)
ATTENUATOR
(30 dB/10 W)
OPERATION
1) C o n n e c t a M o d u l a t i o n
A n a l y ze r t o t h e a n t e n n a
c o n n e c t o r t h r o u g h a n
Attenuator.
2) Connect an Audio Generator
to the JIG cable (see the
page 5-1).
" 1) Set the Audio Generator as;
Frequency : 1 kHz
Level : 90 mVrms
2) Adjust the deviation using
[DIAL], then release the PTT
and push [BAND] to store the
adjustment value.
" 1) Set the Audio Generator as;
Frequency : 300 Hz
Level : 90 mVrms
2) Adjust the deviation using
[DIAL], then release the PTT
and push [BAND] to store the
adjustment value.
(4) (5)
JIG cable
(See the page 5-1)
Be sure the polarity.
To the battery contact pins
5 - 11
ADJUSTMENT
ITEM
–
[ ]
[ ]
(6) (7)
7.4 V
DC power supply
–
+
Fusese
(3A)
VALUE
–
4.2–4.3 kHz
4.0–4.1 kHz
−
⊕