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IF TOTAL
GAIN
TOTAL GAIN
(for 144 M)
(for 430 M)
Ic APC
DRIVE LEVEL
LO LEAK
(for 144 M)
TRANSMITTER ADJUSTMENTS (continued)
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
1
2
3
1
2
1
• Display frequency: Any
• Mode : USB
• MIC gain : Center
• Disconnect P501 (PA unit) from J51
on the MAIN unit.
• Connect an audio generator to
[MIC] connector and set as:
Frequency : 1.5 kHz
Level : 2 mVrms
• Transmitting
• Display frequency:
[EUR], [KOR] 145.0000 MHz
[USA-1], [AUS] 146.0000 MHz
• Mode : USB
• RF power : Maximum
• MIC gain : Center
• Connect an audio generator to
[MIC] connector and set as:
Frequency : 1.5 kHz
Level : 2 mVrms
• Transmitting
• Display frequency:
[EUR], [KOR] 435.0000 MHz
[USA-1], [AUS] 450.0000 MHz
• Transmitting
• Display frequency: 146.0000 MHz
• Mode : USB
• Connect CP1631 (MAIN unit) to
GND.
• RF power : Maximum
• Mic gain : Center
• Connect an audio generator to
[MIC] connector and set as:
Frequency : 1.5 kHz
Level : 20 mVrms
• Transmitting
• Display frequency: 146.0000 MHz
• Mode : USB
• RF power : Maximum
• Mic gain : Center
• Disconnect P501 (PA unit) from J51
on the MAIN unit.
• Connect an audio generator to
[MIC] connector and set as:
Frequency : 1.5 kHz
Level : 20 mVrms
• Transmitting
• Mode : CW
• CW paddle : OFF
• Connect a keyer to the [KEY] jack.
• Key down (transmitting)
• Display frequency:
[EUR], [KOR] 146.0000 MHz
[USA-1], [AUS] 148.0000 MHz
• Mode : USB
• RF power : Minimum
• MIC gain : Center
• Transmitting
MAIN
Rear
panel
Rear
panel
MAIN
Rear
panel
Connect an RF volt-
meter to check point
J51 via the JIG cable
(B).
Connect an RF
power meter to [VHF
ANT] connector.
Connect an RF
power meter to [UHF
ANT] connector.
Connect an ammeter
(30A) between power
supply and the IC-
910H.
Connect an RF volt-
meter to check point
J51 via the JIG cable
(B).
Connect an RF
power meter to [VHF
ANT] connector.
–22 dBm
50 W
37.5 W
23 A
Read the RF voltmeter
indication.
Same level as step 1
Minimum output power
MAIN
PA
MAIN
MAIN
PA
R3
R503
R3
R1613
Verify
R202
R504
After adjustment, connect P501 (PA unit) to J51 on the MAIN.
After adjustment, connect P501 (PA unit) to J51 on the MAIN.
LO leak must be performed after software adjustment (7) “TX POWER/METER”.
After adjustment, disconnect CP1631 (PA unit) from GND on the MAIN.