Icom IC-R9500 Service Manual - Page 31

Receive Adjustments (vhf And Uhf) [rx-v/u2

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4-7 RECEIVE ADJUSTMENTS (VHF and UHF) [RX-V/U2] • Push [F-4•RX V/U2] key to select RX V/U2 ADJUSTMENT. • Connect the SG to [ANT2] and set as; Modulation : None NOTE: HOLD the adjustment condition (SG level and frequency etc.) until next ADJ item is displayed. ADJUSTMENT ITEM ADJUSTMENT CONDITION OPERATION VALUE TOTAL GAIN 1) Set the SG as; Measure the AF output level and set it as [Total Gain V/U2-1 PRE OFF] Frequency : 1260.0215 MHz the reference level (0 dB). Level : +60 dBu 0 dB 2) Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF 25 dB less output level. than reference Push [F-7] key. level above [Total Gain V/U2-1 PRE ON] • Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF output level. Push [F-7] key. [Total Gain V/U2-2 PRE OFF] 1) Set the SG as; Measure the AF output level and set it as Frequency : 2350.0215 MHz the reference level (0 dB). Level : +60 dBu 0 dB 2) Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF 25 dB less output level. than reference Push [F-7] key. level above [Total Gain V/U2-2 PRE ON] • Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF output level. Push [F-7] key. [Total Gain V/U2-3 PRE OFF] • Set the SG as; Measure the AF output level and set it as Frequency : 3000.0215 MHz the reference level (0 dB). Level : +60 dBu 0 dB 2) Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF 25 dB less output level. than reference Push [F-7] key. level above [Total Gain V/U2-3 PRE ON] 2) Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF output level. Push [F-7] key. GAIN-UP TOTAL GAIN [Gain UP Total Gain V/U2-1 PRE OFF] 1) Set the SG as; Measure the AF output level and set it as Frequency : 1260.0215 MHz the reference level (0 dB). Level : + 60dBu 0 dB 2) Set the SG as; Level : OFF Rotate [MAIN DIAL] to adjust the AF 15 dB less output level. than reference Push [F-7] key. level above [Gain UP Total Gain V/U2-1 PRE ON] • Set the SG as; Level : +60 dBu Rotate [MAIN DIAL] to adjust the AF 10 dB less output level. than reference Push [F-7] key. level above 4 - 14

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4 - 14
ADJUSTMENT ITEM
ADJUSTMENT CONDITION
OPERATION
VALUE
TOTAL GAIN
[Total Gain V/U2-1 PRE OFF]
1) Set the SG as;
Frequency
: 1260.0215 MHz
Level
: +60 dBu
Measure the AF output level
and set it as
the reference level (0 dB).
0 dB
2) Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
25 dB less
than reference
level above
[Total Gain V/U2-1 PRE ON]
• Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
[Total Gain V/U2-2 PRE OFF]
1) Set the SG as;
Frequency
: 2350.0215 MHz
Level
: +60 dBu
Measure the AF output level
and set it as
the reference level (0 dB).
0 dB
2) Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
25 dB
less
than reference
level above
[Total Gain V/U2-2 PRE ON]
• Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
[Total Gain V/U2-3 PRE OFF]
• Set the SG as;
Frequency
: 3000.0215 MHz
Level
: +60 dBu
Measure the AF output level
and set it as
the reference level (0 dB).
0 dB
2) Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
25 dB
less
than reference
level above
[Total Gain V/U2-3 PRE ON]
2) Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
GAIN-UP TOTAL GAIN
[Gain UP Total Gain V/U2-1
PRE OFF]
1) Set the SG as;
Frequency
: 1260.0215 MHz
Level
: + 60dBu
Measure the AF output level
and set it as
the reference level (0 dB).
0 dB
2) Set the SG as;
Level
: OFF
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
15 dB
less
than reference
level above
[Gain UP Total Gain V/U2-1
PRE ON]
• Set the SG as;
Level
: +60 dBu
Rotate
[MAIN DIAL]
to adjust the AF
output level.
Push [F-7] key.
10 dB
less
than reference
level above
4-7 RECEIVE ADJUSTMENTS (VHF and UHF) [RX-V/U2]
• Push [F-4•RX V/U2] key to select RX V/U2 ADJUSTMENT.
• Connect the SG to [ANT2]
and set as;
Modulation
: None
NOTE:
HOLD
the adjustment condition (SG level and frequency
etc.) until next ADJ item is displayed.