Square Wave Symmetry; High Band Adjustment - Agilent Technologies 83620A Service Manual

19. Square Wave Symmetry

Description and Procedure
Use this adjustment to set the synthesizer modulation (27.78 square wave)
for equal RF on/o periods. his is accomplished by minimizing the even
harmonics of the 27.78 square wave.

High Band Adjustment

1. Connect the equipment as shown in Figure 3-34. Preset both instruments
and let them warm up for at least one hour.
Figure 3-34. quare Wave ymmetry Adjustment etup
Spectrum Analyzer
2. On the synthesizer, press:
CW 5 GHz
5 5 5
POWER LEVEL 5 dBm
5 5
3. On the spectrum analyzer, press:
Center Frequency:
Frequency pan:
Make sure the signal is centered on the display.
3-112 Adjustments
quare Wave ymmetry
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Equipment
5
5 GHz
200 kHz
HP 8566B
HP 8360