Adjustment - Icom IC-4088E Service Manual

5-2 ADJUSTMENT MODE ADJUSTMENTS
The following adjustment must be performed at "ADJUSTMENT MODE".

ADJUSTMENT

REFERENCE
1 • Operating channel
FREQUENCY
• Transmitting
[Fr]
OUTPUT
1 • Operating channel
POWER • Transmitting
[PL]
1 • Operating channel
FM
• Connect an audio generator to the [MIC]
DEVIATION
jack and set as
[dL]
• Set an FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Set group No.
• Transmitting
CTCSS
2 • Operating channel
[to]
• Set group No.
• Transmitting
1 • Operating channel
SQUELCH
• Connect an SSG to J1 on the RF unit and
[Sq]
set as:
Level
Modulation
• Receiving
2 • Set an SSG as:
Level
• Receiving
ADJUSTMENT CONDITION
: Ch 35
: Ch 35
: Ch 35
:1 kHz/100 mV rms
: OFF
: 20 kHz or 15 kHz
: OFF
: (P–P)/2
: OFF (– –)
: Ch 35
: 01
: Ch 35
: 0.13 µV*
(–125 dBm)
: OFF
: OFF
MEASUREMENT
Loosely couple a fre-
quency counter to the
antenna.
Connect an RF power
meter to the RF test
port J1.
Connect an FM devia-
tion meter to the RF
test port J1.
speaker
5 - 2
VALUE HM-75A's KEY
[UP]/[DN]
433.925000 MHz
[UP]/[DN]
10 mW
[UP]/[DN]
±4.1 kHz
[UP]/[DN]
±0.70 kHz
[A]
Verify
Audio signal
disappears.