![background image](http://html.mh-extra.com/html/icom/ic-80ad/ic-80ad_service-manual_612360018.webp)
5 - 3
5-2 FREQUENCY ADJUSTMENT
Select an adjustment item using
[2]
/
[8]
, then set the adjustment value as specifi ed using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
REFERENCE
FREQUENCY
[FR]
1
1) Set the power supply voltage to 7.4 V.
2) Connect an RF power meter to the antenna connector.
3) Loose couple a frequency counter to the antenna connector.
4) While transmitting, adjust the frequency using
[DIAL]
, then push
[BAND
] to store the adjustment value.
440.0000
MHz
(±200 Hz)
5-3 IDLING CURRENT ADJUSTMENT (at 5.0 V)
Select an adjustment item using
[2]
/
[8]
, then set the adjustment value as specifi ed using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
DRIVE AMP
IDLING CURRENT
[ID5]
1
1) Set the power supply voltage to 5.0 V.
2) Connect an RF power meter to the antenna connector.
3) Connect a multimeter between the power supply and transceiver.
4) Set the item
[IP5]
to "00."
–
[VHF BAND]
2
• While transmitting, adjust the idling current using
[DIAL]
, then
push
[BAND
] to store the adjustment value.
180–230
mA
[UHF BAND]
3
150–200
mA
FINAL AMP
IDLING CURRENT
[IP5]
1
1) Set the power supply voltage to 5.0 V.
2) Connect an RF power meter to the antenna connector.
3) Connect a multimeter between the power supply and transceiver.
–
[VHF BAND]
2
• While transmitting, adjust the idling current using
[DIAL]
, then
push
[BAND]
to store the adjustment value.
200–300
mA
[UHF BAND]
3
NOTE:
When "
IDLING CURRENT
" is adjusted, "
TRANSMIT POWER
" must be re-adjusted too.