Tektronix WCA200A, User Manual

Page: 269 / 454

Setting Timing Parameters
WCA230A & WCA280A User Manual
3- 143
Acquisition History
typically 1024 data points
One frame Time
M frames = 1 block Frame number
Acquisition Length
0 --1 --2 --(M--2) --(M--1)
0 --1 --2 --(N--2) --(N--1)
N blocks Block number
Trigger output Analysis start point
Analysis Offset Analysis Length
Subview display
FFT start point
Main view display
Spectrum Offset Spectrum Length
Demod and Time
modes only
Figure 3- 97: Timing parameters
The Timing menu in the Real Time S/A (real-time spectrum analysis) mode
contains the following items:
Acquisition Length. Same as in the Demod and Time modes.
Spectrum Offset. Specifies the number of the frame in the spectrogram to
display the spectrum. The latest frame is number zero. Older frames have larger
negative numbers.
Timing Parameters in
Real Time S/A Mode