22 scans and sweeps – SRS Labs SR850 User Manual

Page 34

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2-22

Scans and Sweeps

16. When the scan is complete, press

[TRACE/SCAN].

Press <1 Shot/Loop> to select Loop.

Press [PAUSE/RESET]

Press [START/CONT] to start the scan again.

17. Press [PAUSE/RESET] ONCE.

Press [START/CONT]

18. Press [DISPLAY/SCALE]

Press <sec/div> (the last softkey).

Use the knob to select 20 S/div.

looping (Loop). In the loop mode, scans repeat
indefinitely and the entire data buffer is filled at the
sample rate. When the end is reached, new points
are added at the beginning again, overwriting the
oldest data. This mode is convenient for always
storing the last buffer full of data. If something
worth saving occurs, simply pause the scan and
save, print or plot the data.

Display the Trace and Scan menu.

Choose the loop buffer.

Reset the scan and data buffer.

This time, the scan and sweep will repeat at the
end. The buffer is capable of storing 16000 points
(for 4 traces). Each scan is 3200 points so 5 com-
plete sweeps can be stored in the buffer.

Pause the scan by pressing the [PAUSE/RESET]
key once while the scan is in progress. The scan
indicator shows PAUSE. Pressing this key again
will reset the data!!!

Resume the scan with [START/CONT] key.

Let the scan run for more than 100 seconds so
data scrolls past the left edge of the graph.

Show the Display and Scale menu.

Highlight the horizontal chart scale.

Twice as much data will now be shown on the
graph. 2 complete sweeps can now be displayed
on the graph.

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