Icom IC-4088SR - Adjustment Mode Adjustments

5 - 3
REFERENCE
FREQUENCY
[Fr]
OUTPUT
POWER
[PL]
FM DEVIATION
[dL]
CTCSS
MODULATION
[to]
SQUELCH
SENSITIVITY
[Sq]
446.09375 MHz
450 mW
± 2.05 kHz
± 0.30 kHz
Audio signal
disappears
• Operating channel : Ch 8
• Transmitting
• Operating channel : Ch 8
• Transmitting
• Operating channel : Ch 8
• Connect an audio generator to the [MIC]
jack and set as :1 kHz/100 mV rms
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz or 15 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Set group No. : OFF (– –)
• Transmitting
• Operating channel : Ch 1
• Set group No. : 24
• Transmitting
• Operating channel : Ch 1
• Connect an SSG to J1 on the RF unit and
set as:
Level : 0.13 µV*
(–125 dBm)
Modulation : OFF
• Receiving
• Set an SSG as:
Level : OFF
• Receiving
[
∫]/[√]
[∫]/[√]
[
∫]/[√]
[
∫]/[√]
Verify
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 ADJUSTMENT MODE ADJUSTMENTS
The following adjustment must be performed at “ADJUSTMENT MODE”.
ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT VALUE HM-75A’s KEY
1
1
1
2
1
2
• Squelch sensitivity is adjusted
automatically when HM-75A’s
[A] button is pushed.