HP 8559A Operation And Service Manual page 54

PERFORMANCE TESTS
RESOLUTION BANDWIDTH ACCURACY (Cont'd)
Signal Generator:
COUNTERMODE
AM
FM
FREQUENCYTUNE
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RF
OUTPUTLEVEL
Connect equipment as shown in Figure 4-10.
For early instruments that do not feature A16J3, a 21.4-MHz signal can be
injected directly into the 300-MHz output (A1OJ1) of Third Converter Assem-
bly A10. Set the signal generator OUTPUT LEVEL to 0 dBm and use the
spectrum analyzer REFERENCE LEVEL and REF LEVEL FINE controls in
step 14 (= 40 dBm) to position the trace at 7.1 divisions above the graticule
-
baseline.
Adjust signal generator frequency until spectrum analyzer trace is at peak. Set signal generator OUTPUT
LEVEL to position trace at 7.1 divisions above graticule baseline. Set COUNTER MODE to EXPAND
Tune signal generator frequency until trace drops to 5 divisions above graticule baseline. Record signal
generator frequency.
Tune signal generator frequency in direction opposite to that of step 15 until trace peaks (7.1 divisions
above graticule baseline) and then drops to 5 divisions above graticule baseline. Record signal generator
frequency.
Calculate and record resolution bandwidth at 3-dB points (difference between frequencies recorded in
steps 15 and 16).
Set RESOLUTION BW to 10 kHz, leaving FREQ SPAWDIV set to 0. Repeat steps 14 through 17.
PERFORMANCE TESTS
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NOTE
Min. Actual
25.0 kHz
Min. Actual
8.0 kHz
MODEL 8559A
OFF
OFF
ON
MHz
MHz
Max.
34.50 kHz
Max.
11 S O kHz