Icom IC-PCR1500, Руководство по обслуживанию

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5 - 5
5-3 MAIN-B UNIT ADJUSTMENT (PCR2500 only)
ADJUSTMENT OPERATION VALUE
BPF
[LT1]–[HTF] 1 • Set the adjustment items as below before the “BPF” adjustment.
[AGA] : “8A”
[IFA] : “25”
Automatic adjustment
2 • Connect an SSG to the antenna connector “ANT1” and set as;
Frequency : Specifi ed frequency*
Modulation : none
Level : Specifi ed level
†
3 • Push [SET•SKIP] to store the set value.
4 • Repeat 2–3 for each specifi ed frequency then level for [LT1] to [HTF].
AGC GAIN
(FM)
[AGF] 1 • Connect an SSG to the antenna connector and set as;
Frequency : Specifi ed frequency*
Mode : FM
Deviation : 3.5 kHz
Level : +34 dBµ (–73 dBm)
‡
Modulation : 1 kHz
50 mW
2 • Connect a speaker and milliwatt meter and set the audio output level
to 50 mW with [VOL] .
3 • Push [MAIN•NB] to select next adjustment item.
(AM)
[AGA] 4 • Set the SSG as;
Frequency : Specifi ed frequency*
Mode : AM
Deviation : 70%
Level : +34 dBµ (–73 dBm)
‡
Modulation : 1 kHz
50 mW
5 •
•
Set the audio output level to 50 mW with [DIAL] .
Verify that the demodulated audio signals are not distorted badly.
6 • Push [SET•SKIP] to store the adjustment value.
IF GAIN
(FM)
[IFF] 1 • Set the SSG as;
Level : OFF
50 mW
2 • Connect a speaker and milliwatt meter then set the audio output level
to 50 mW with [VOL] .
3 • Push [SET•LOCK]/[MAIN•NB] to select next adjustment item.
(AM)
[IFA] 4 • Set the audio output level to 80 µW with [DIAL] . 80 µW
5 • Push [TS•MODE]/[SET•SKIP] to store the adjustment value.
*Displayed on the controller's display.
‡
The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
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