Receive Adjustment (V/U2) - Icom IC-R9500 Service Manual Addendum

4-6 RECEIVE ADJUSTMENTS (VHF and UHF) [RX-V/U1]
• Push [F-3•RX V/U1] key to select RX V/U1 ADJUSTMENT.
• Connect an AC milivoltmeter to the [EXT-SP] jack.
• Connect an SG to [ANT1/HF ANT3] and set as;
Modulation
NOTE: HOLD the adjustment condition (SG level and frequency etc.) until next ADJ item is displayed.
ADJUSTMENT ITEM
TOTAL GAIN
[Total Gain V/U1 PRE OFF]
[Total Gain V/U1 PRE ON]
[Total Gain V/U2 PRE OFF]
[Total Gain V/U2 PRE ON]
DSP GAIN-UP TOTAL GAIN
[Gain UP Total Gain V/U1 PRE
OFF]
[Gain UP Total Gain V/U1 PRE
ON]
[Gain UP Total Gain V/U2 PRE
OFF]
[Gain UP Total Gain V/U2 PRE
ON]
: None
ADJUSTMENT CONDITION
1) Set the SG as;
Frequency : 50.1515 MHz
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
1) Set the SG as;
Frequency : 625.0215 MHz
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
1) Set the SG as;
Frequency : 50.1515 MHz
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
1) Set the SG as;
Frequency : 625.0215 MHz
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
OPERATION
Measure the AF output level and set it as
the reference level (0 dB).
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Measure the AF output level and set it as
the reference level (0 dB).
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Measure the AF output level and set it as
the reference level (0 dB).
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Measure the AF output level and set it as
the reference level (0 dB).
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
4 - 11
VALUE
0 dB
−25 dB less
than reference
level above
0 dB
25 dB less
than reference
level above
0 dB
15 dB less
than reference
level above
10 dB less
than reference
level above
0 dB
15 dB less
than reference
level above
10 dB less
than reference
level above