Functions and Measurements
Stimulus Response Transmission
58
5 To increase measurement sensitivity and smooth the noise:
Press > Res Bw > 30 > KHz
Press > Video Bw > 300 > KHz
A decrease in displayed amplitude is caused by tracking
error
.
6 Use peak tracking to correct the frequency offset:
Press > Tracking Generator > More > Tracking Peak
Tracking error occurs when the output frequency of the
tracking generator is not matched to the input frequency of
the analyzer. The amplitude should return to the value that
was displayed prior to the decrease in resolution bandwidth.
7 Connect the cable from the tracking generator output to the
analyzer input. Store the frequency response in trace 3 and
normalize:
Press > Tracking Generator > More > Normalize > Store Ref (1
→ 3) > Normalize (On)
8 Reconnect the DUT to the analyzer and change the
normalized reference position:
Press > Tracking Generator > More > Normalize > Norm Ref
Posn > 8
NOTE
To reduce ripples caused by source return loss, use 6 dB or greater
output attenuation. Tracking generator output attenuation is normally
a function of the source power selected. However, the output
attenuation may be controlled in the Tracking Generator menu.
BW/
Avg
BW/
Avg
MODE
MODE
MODE
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