Icom IC-PCR1500 Service Manual

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Contents

Icom IC-PCR1500 Service Manual Manual pdf 21 page image

5 - 3ADJUSTMENT OPERATION VALUEREFERENCEFREQUENCY[REF]1 • Connect a frequency counter to the J5 connector on the MAIN-AUNIT (see the illust below).10.25000 MHz2 • Push [TS•MODE]/[SET•SKIP] to store the set value.BPF[LT1]–[HTF]1 • Preset the adjustment items as below before the “BPF“ adjustment.[AGA] : “8A”[IFA] : “25”Automatic adjustment2 • Connect an SSG to the antenna connector “ANT1” and set as;Frequency : Specifi ed frequency*Modulation : noneLevel : Specifi ed level†3 • Push [TS•MODE]/[SET•SKIP] to store the adjustment value.4 • Repeat 2–3 for each specifi ed frequency and 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 : FMModulation : 1 kHzDeviation : 3.5 kHzLevel : +34 dBμ (–73 dBm)‡50 mW2 • Connect a speaker and milliwatt meter then set the audio output levelto 50 mW with [VOL].3 • Push [SET•LOCK]/[MAIN•NB] to select next adjustment item.(AM)[AGA]4 • Set the SSG as;Frequency : Specifi ed frequency*Mode : AMModulation : 1 kHzDeviation : 70%Level : +34 dBμ (–73 dBm)‡50 mW5 ••Set the audio output level to 50 mW with [DIAL].Verify that the demodulated audio signals are not distorted badly.6 • Push [TS•MODE]/[SET•SKIP] to store the adjustment value.IF GAIN(FM)[IFF]1 • Set the SSG as;Level : OFF50 mW2 • Connect a speaker and milliwatt meter then set the audio output levelto 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 μW5 • Push [TS•MODE]/[SET•SKIP] to store the adjustment value.5-2 MAIN-A UNIT ADJUSTMENT*Displayed on the controller's display.J52EMOVETHESHEILDCOVER-!). !5.)4‡The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.–†Refer to the “ADJUSTMENT ITEM LIST“ on page 5-7.