GW Instek GSP-930 User Manual - Manual (Page 157)

ADVANCED OPERATION
155
Composite Second Order (CSO)
Description Composite Second Order measurement
calculates the difference in amplitude between
the carrier signal and the composite second
order beat.
Parameters CSO CH SP: The channel space.
Measurement
items Visual Carrier: frequency, amplitude
Channel Space: frequency
CSO: amplitude difference
Example
1
Δf
Visual carrier marker
Aural, audio
carrier
2 CSO Beat marker
C
S
O
d
B
Channel
spacing
To next main channel
Operation: 1. Press
Meas
> CNR/CSO/CTB[F7]>Setup[F1]>
CSO[F2] and choose CSO.
2. Press CSO[F2] and toggle CSO on.
 Any other measurement mode will automatically be
disabled.
3. The display splits into two screens. The top
shows the trace with the visual carrier marker
and the CSO beat marker. The bottom screen
shows the CSO measurements.