Harmonic Measurement 38 To 50 Ghz - Agilent Technologies 83620A Service Manual

Adjust the reference level to position the signal peak at the top reference
graticule. Use this reference level for all harmonic measurements.
26. On the spectrum analyzer, set:
tart Frequency: 26.5 GHz
top Frequency:
27. Manually sweep the synthesizer across the frequency range while checking
the spectrum analyzer display for harmonics and subharmonics. See
able 2-11 for the YO frequency ranges that correspond to the RF output
frequencies.
Since an external mixer is used, use the spectrum analyzer signal identify
feature to verify that suspected signals are in the 26.5 to 40 GHz frequency
range. he signals most likely to appear are the fth and sixth YO
harmonics.
28. Compare the amplitude of the harmonics and subharmonics to the
speci cations listed in the test record. If any harmonics or subharmonics
are within 5 dB of the speci cation, make a more accurate measurement
using the \Harmonic/Subharmonic Veri cation Procedure 20 GHz" that
follows. Note the worst case harmonic
subharmonic
29. For the HP 83640A only: From step 28, determine the worst case harmonic
 
from 26.5 to 40 GHz and record this value on the test record.
For the HP 83640A/50A only: From steps 20 and 28, determine the worst
case subharmonic from 20 and
test record.

Harmonic Measurement 38 to 50 GHz

Disregar if beyon your synthesizer's capability.
30. Replace the HP 11970A mixer with the HP 11970Q Mixer (33 to 50 GHz).
31. On the spectrum analyzer, select external mixer for the 33 to 50 GHz
frequency range and set the reference level o set to compensate for the
conversion loss at 40 GHz.
32. On the synthesizer, press:
CW 40 GHz
5 5 5
2-46 Performance Tests
purious ignals (Harmonics ubharmonics)
All manuals and user guides at all-guides.com
40 GHz (HP 83640A)
38 GHz (HP 83650A)
from 26.5 to 40 GHz.

40 GHz and record this value on the
and the worst case
HP 8360