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PA UNIT
PRESETTING
IDLING
CURRENT
(for 144 M)
(for 430 M)
RF PEAK
(for 430 M)
(for 144 M)
IF PEAK
CARRIER
SUPPRESSION
• Preset R131, R135, R150, R650 (PA unit) to max. counter clockwise.
• Preset R3, R138, R503 (PA unit) to center position.
• Preset C154, C659 (PA unit) to center position as illustration at right.
5 - 8
5-5 TRANSMITTER ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
1
2
3
4
1
2
3
4
1
1
2
3
• Display frequency:
[EUR], [KOR]
145.0000 MHz
[USA-1], [AUS] 146.0000 MHz
• Mode
: CW
• Transmitting
• Transmitting
• Transmitting
• Display frequency:
[EUR], [KOR]
435.0000 MHz
[USA-1], [AUS] 450.0000 MHz
• Mode
: CW
• Transmitting
• Display frequency: 440.0000 MHz
• Connect an SSG to P1 on the PA
unit via the JIG cable (A) and set as:
Frequency : 10.850 MHz
Level
: 18 mV* (–22 dBm)
Modulation : OFF
• Transmitting
• Set an SSG as:
Level
: 0.79 µV* (–2 dBm)
• Transmitting
• Connect an SSG to P501 on the PA
unit via the JIG cable (A) and set as:
Frequency : 10.850 MHz
Level
: 18 mV* (–22 dBm)
Modulation : OFF
• Display frequency: 146.0000 MHz
• Set an SSG as:
Level
: 0.79 µV* (–2 dBm)
• Transmitting
• Display frequency: Any
• Mode
: USB
• MIC gain
: Center
• Connect an audio generator to
[MIC] connector and set as:
Frequency
: 1.5 kHz
Level
: 2 mVrms
• Transmitting
• Display frequency: Any
• Mode
: USB
• Mic gain
: Minimum
• Apply no audio signals to [MIC]
connector.
• Transmitting
• Mode
: LSB
• Transmitting
PA
Rear
panel
MAIN
MAIN
Connect an ammeter
(3 A) between power
supply and the IC-
910H.
Connect an RF
power meter to [UHF
ANT] connector.
Connect an RF
power meter to [VHF
ANT] connector.
Connect an RF volt-
meter to check point
J51 via the JIG cable
(B).
Connect a spectrum
analyzer to check
point J51 via the JIG
cable (B).
At the point where the
TX current increases
0.5 A.
At the point where the
TX current increases
1.0 A as step 1.
At the point where the
TX current increases
0.5 A as step 2.
At the point where the
TX current increases
1.0 A.
Maximum output
power
Maximum output
power
Maximum level
Minimum carrier level
PA
PA
PA
MAIN
MAIN
R131
R135
(R138)
R650
R150
L1, L2
C154
C659
L2, L3
R206,
R215
• Repeat step 1, step 2 several times.
Refer page 5-16 software adjustment 6.
Содержание IC-910H
Страница 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 23 SCHEMATIC DIAGRAM 33 Nov 2008 ...
Страница 26: ...Nov 2008 25 DISPLAY UNIT TOP VIEW The combination of top side and bottom side of this ...
Страница 33: ...Nov 2008 32 MAIN UNIT BOT VIEW The combination of top side and bottom side of this ...
Страница 41: ...SERVICE MANUAL VHF UHF ALL MODE TRANSCEIVER i910H ...
Страница 118: ...9 2 BOTTOM VIEW RIT BOARD BOTTOM VIEW VR A BOARD BOTTOM VIEW VR B BOARD ...
Страница 121: ...9 5 9 11 DISPLAY BOARD TOP VIEW 8 5 1 4 1 8 16 9 1 8 16 9 1 8 16 9 ...
Страница 124: ...9 8 BOTTOM VIEW PA UNIT 1 3 4 6 1 3 4 6 ...
Страница 126: ...9 10 BOTTOM VIEW PLL UNIT R341 MP11 ...
Страница 130: ...9 14 BOTTOM VIEW UX 910 MAIN UNIT 1 4 8 5 ...
Страница 144: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13714HZ C1 2001 Icom Inc ...