Tektronix WCA200A, User Manual

Page: 150 / 454

Spectrum Analysis (S/A Mode)
3- 24
WCA230A & WCA280A User Manual
Zoom Function
When you select S/A → Real Time S/A with Zoom , the real-time analysis area
can be specified on the spectrogram. Even though frequency hopping occurs,
measurement can only be made by clipping the optional burst (see Figure 3--22).
Spectrogram with
the zoom function
Spectrum in
the zoomed area
Figure 3- 22: Zoom function
In the spectrogram with the zoom function display, the zoomed area is set by the
following Timing menu (see Figure 3--23). The area is the analysis range.
Acquisition Length.
Sets the capture time of one block.
Acquisition History.
A block number that analyzes/displays data is specified.
The latest block number is 0. Older blocks have larger negative numbers.
Analysis Length. Sets the time length of the zoomed area in the block set in the
Acquisition History.
Analysis Offset. Sets the starting point of the zoomed area by considering the
trigger output point as the reference.
Frequency Center
. Sets the frequency of the center of zoomed area.
Frequency Width . Sets the frequency width of the zoomed area.
Refer to Setting Timing Parameters on page 3--141.
Timing Menu