Spurious Signals (Line-Related) - Agilent Technologies 83620A Service Manual

10. Spurious Signals (Line-Related)

Description and Procedure
Use this procedure to measure line-related spurs. he synthesizer is placed at
a CW frequency where the synthesizer is most sensitive to line-related spurs.
he spectrum analyzer measures the RF output o set by the harmonics of the
line power frequency (60 Hz or 50 Hz). o eliminate measuring the spectrum
analyzer line-related spurs, an Invertron is used to operate the spectrum
analyzer at a di erent line frequency so that its own spurs will not a ect the
measurement.
he spectrum analyzer must have the capability of a 10 Hz resolution
bandwidth. A wider resolution bandwidth results in the synthesizer's phase
noise masking the spur.
1. Set the invertron for a line frequency of 55 Hz and for normal operating
voltage.
2. Connect the equipment as shown in Figure 2-12. Preset the instruments
and let them warm up for at least one hour.
Figure 2-12. purious signals (Line-Related) Test etup
Spectrum Analyzer
Invertron
2-56 Performance Tests
purious ignals (Line-Related)
All manuals and user guides at all-guides.com
Equipment
HP 8566B
California Instruments 501 C
HP 8360