Agilent Technologies 8360 L Series, Service Manual

Page: 128 / 603

9. Spurious Signals (Non-Harmonic)
Description and Procedure
Use this pro cedure to measure kno wn, xed, oset spurs that are generated in the frequency
syn thesis section of the syn thesizer. The syn thesizer is set to v arious CW frequencies where
these spurious signals will most likely o ccur. Then the sp ectrum analyzer is tuned to the spur
frequencies to measure their lev els.
1. Preset the instrumen ts sho wn in Figure 2-11 and let them w arm up for at least one hour.
On the HP/Agilent 8566B, connect the CAL OUTPUT to the RF INPUT. Press 4 SHIFT 5
4 W 5 to calibrate the sp ectrum analyzer.
Figure 2-11. Spurious Signals (Non-Harmonic) T est Setup
Equipment
Sp ectrum Analyzer HP/Agilent 8566B
2. T o ac hiev e p eak p o w er, turn on RF p eaking. Set:
4 USER CAL 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Tracking Menu
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Peak RF Always (asterisk on)
3. Connect the equipmen t as sho wn in Figure 2-11.
Fixed Spurious Signals
4. On the syn thesizer, press:
4
CW
5 4
19.765
5 4
GHz
5
4 POWER LEVEL 5 Set the maximum sp ecied lev eled p o w er.
5. On the sp ectrum analyzer, set:
Center Frequency: 19.765 GHz
Frequency Span: 500 kHz
Reference Level: 10 dBm
Scale Log: 5 dB/Division
Resolution Bandwidth: Auto
SweepTime: Auto
Marker: Set to 19.765 GHz
Agilent 8360 P erformance T ests
Spurious Signals (Non-Harmonic)
2-41