Receive Adjustment (Hf) - Icom IC-R9500 Service Manual

4-4 RECEIVE ADJUSTMENTS (HF) [RX-HF]
• Push [F-4•RX] key to enter the receive adjustment menu then push [F-1•RX-HF] key to select RX-HF ADJUSTMENT.
• Connect an AC milivoltmeter to the [EXT-SP] jack.
• Connect an SG to [HF-ANT1] and set as;
Frequency
Modulation
NOTE: HOLD the adjustment condition (SG level and frequency etc.) until next ADJ item is displayed.
ADJUSTMENT ITEM
TOTAL GAIN
[Total Gain HF PRE OFF]
[Total Gain HF PRE1 ON]
[Total Gain HF PRE2 ON]
DSP GAIN-UP TOTAL GAIN
[Gain UP Total Gain HF PRE
OFF]
[Gain UP Total Gain HF PRE1
ON]
[Gain UP Total Gain HF PRE2
ON]
EXTERNAL AGC
[AGC(RX-DSP)]
S-MERTER
[HF S0 LEVEL]
[HF S9 LEVEL]
[S9+60 LEVEL]
: 14.1515 MHz
: None
ADJUSTMENT CONDITION
1) Set the SG as;
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level :OFF
• Set the SG as;
Level : OFF
1) Set the SG as;
Level : +60 dBu
2) Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
• Set the SG as;
Level : OFF
• Set the SG as;
Level : +70 dBu
• Set the SG as;
Level : OFF
• Set the SG as;
Level : +34 dBu
• Set the SG as;
Level : +94 dBu
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.
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.
Rotate [MAIN DIAL] to adjust the AF
output level.
Push [F-7] key.
Push [F-7] key.
Push [F-7] key.
Push [F-7] key.
Push [F-7] key.
4 - 4
VALUE
0 dB
30 dB less
than reference
level above
0 dB
15 dB less
than reference
level above
12 dB less
than reference
level above
10 dB less
than reference
level above
(Automatic
adjustment)
(Automatic
adjustment)