HP 8559A Operation And Service Manual page 196

5-21.
BANDWIDTH FILTER ADJUSTMENTS (SERIAL PREFIX 1909A) (Cont'd)
PROCEDURE:
Allow 30 minutes warmup time before performing adjustments.
1. Set spectrum analyzer controls as follows:
TUNING.
RESOLUTION BW
INPUTATTEN
SWEEPTRIGGER
Crystal Alignment
Connect equipment as shown in Figure 5-5.
If Sweep GeneratorlBandwidth Control Assembly A9 has been replaced or
adjusted, perform steps 3 through 9. If not, proceed to step 10.
Set FREQ SPAN/DIV to 500 kHz and RESOLUTION BW to 1 MHz.
Center the signal with TUNING control. Using REF LEVEL FINE control, place signal at 7.1 divisions
(0.9 division from top graticule line).
Adjust A9R85 LC until signal is two divisions wide at the fifth graticule line (1 MHz wide at 3-dB points).
Set FREQ SPAN/DIV to 10 kHz and RESOLUTION BW to 10 kHz.
Using REF LEVEL FINE control, place signal at 7.1 divisions.
Adjust A9R72 XTL until signal is one division wide at the fifth graticule line (10 kHz wide at 3 d B points).
Set FREQ SPAN/DIV to 10 kHz and RESOLUTION BW to 1 kHz.
Center signal with TUNING control. (It might be necessary to increase FREQ SPAN/DIV temporarily to
find the signal.) Set REF LEVEL FINE control to place signal at sixth gratiwle line.
Do not readjust REF LEVEL FINE control until all crystal and LC bandwidth
filter adjustments have been performed.
ADJUSTMENTS
NOTE
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NOTE
NOTE
,
35 MHz
30dB
LIN
AUTO