Chapter 9 473
IF Section
Cal Oscillator (P/O A4 Assembly)
13.Figure 9-22 on page 475 illustrates normal operation. Severe
failures (slope error greater than 30 percent) and subtle 3 kHz
resolution bandwidth errors (less than 30 percent) indicate a
problem with A4U802, A4U803, A4U804, or A4U106.
14.Severe failure of the bandwidth accompanied by subtle errors in the
output signal indicate an A5 failure.
15.Set the 8566A/B controls as follows:
Center frequency ................................................ 10.710MHz
Resolution bandwidth ................................................ 10kHz
Video bandwidth ........................................................... 1kHz
Sweep time .................................................................. 200ms
16.On the 8564EC or 8565EC spectrum analyzer, press
FULL IF ADJ. When the message IF ADJUST STATUS:1 kHz RBW
appears, press
SINGLE on the 8566A/B.
17.Figure 9-23, “Output Waveform, 1 kHz Resolution Bandwidth”
illustrates normal operation. Severe failures (slope error greater
than 30 percent) and subtle 3 kHz resolution bandwidth errors (less
than 30 percent) indicate a problem with A4U802, U803, U804, or
U106.
18.On the 8564EC or 8565EC spectrum analyzer, press
FULL IF
ADJ. When the message IF ADJUST STATUS: 300 Hz RBW appears,
press
SINGLE on the 8566A/B.
19.Figure 9-24 on page 477 illustrates normal operation. Severe
failures (slope error greater than 30 percent) and 3 kHz resolution
bandwidth errors (less than 30 percent) indicate a problem with
A4U802, U803, U804, or U106.
20.Reconnect W52 (white) to A4J8.
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