Low-Pass Filter - Agilent Technologies 8564EC Service Manual

Spectrum analyzers

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Cal Oscillator (P/O A4 Assembly)

Failed Crystal Set Symptoms

Low-Pass Filter

Refer to function block AB of A4 Log Ampliﬁer Schematic Diagram

(sheet 4 of 4) in the 8560 E-Series Spectrum Analyzer Component Level

Information.

1. Connect a DVM positive probe to A4J9 pin 4.

2. On the 8564EC or 8565EC spectrum analyzer, press

4. Observe the DVM reading while IF ADJUST STATUS: AMPLITUDE is

5. If the DVM reading is outside the range in step 3 but inside the

FULL IF ADJUST

displayed messages IF ADJUST STATUS: 300 kHz RBW and

IF ADJUST STATUS: 3 kHz RBW. During this time period, the

voltage should be within a 2 to 10 Vdc range.

displayed. The reading should be within the 2 to 10 Vdc range.

range in step 4, suspect one of the reactive components in the ﬁlter.

. Observe the DVM reading between the

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