HP 8559A User Manual

ADJUSTMENTS
MODEL
8559A
ADJUSTMENTS
5 - 24. STEP GAIN ADJUSTMENTS (Cont'd)
PROCEDURE:
Set spectrum analyzer controls
as follows:
FREQSPAN/DIV .......................................................... lMHz
......................................................... RESOLUTIONBW lMHz
INPUTATTEN ............................................................. 10dB
............................................................... REFLEVELdBm 0
Amplitudescale ......................................................... ldB/DIV
........................................................ SWEEPTIME/DIV AUTO
..................................................... SWEEPTRIGGER FREERUN
VIDEO FILTER ............................................................. MIN
Connect equipment as shown in Figure 5
- 10. Connect signal generator tuned to 321.4 MHz with approxi -
mately - 30 dBm output to one side of a 1 dB/step attenuator. Connect step attenuator output to AlOWl
through adapter. Tune signal generator frequency for peak amplitude on display.
Set step attenuator to 12 dB and REF LEVEL FINE to
- 12. Set signal generator level for a signal one
division down from top graticule line.
Adjust
A12R39 - 12 D until signal stops rising on display, then adjust A12R39 counterclockwise until
signal drops approximately one third to one half of a division.
Set signal generator level so signal is one division down from top graticule line on display.
Set step attenuator to
0 dB and REF LEVEL FINE to 0.
Adjust A12R35 0 D adjustment for a signal level one division from top graticule line.
Set step attenuator to 12 dB and REF LEVEL FINE to
- 12. DVM indication should be 700 + 30 mV
(offset). If offset is greater than + 30 mV, repeat steps 3 through 8 until DVM indication is within limits.
Replace 1
dB/step attenuator with 10 dB/step attenuator set to 0 dB. Set REF LEVEL FINE control to 0.
Tune signal generator frequency for peak amplitude on the display (near 321.4 MHz).
Set signal generator level for a signal one division down from top graticule line. Set step attenuator to 10
dB and REF LEVEL
dBm to - 10.
Adjust
A12R6 10 D adjustment for signal level one division from top graticule line.
Set step attenuator to 20 dB and REF LEVEL
dBm to - 20.
Adjust
A12R21 20 D adjustment for signal level one division from top graticule line.
Set attenuator to
40 dB and REF LEVEL dBm to - 40.

HP 8559A Specifications

General

Brand	HP
Model	8559A
Category	Measuring Instruments
Language	English