Zoom (Acquisition Stopped); Zoom Example - HP 1652B Getting Started Manual

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(Acquisition

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At sweep speeds of 100 ms/div and slower, the time to acquire the 2048

sample points for acquisition memory is greater than 1 second.

At these sweep speeds the screen will display "Scope waiting for

prestore" when acquiring the 2048 sample points prior to the trigger

point or "Scope waiting for poststore" when acquiring the 2048 sample

points after the trigger point. These advisories let you know the

oscilloscope is still actively acquiring data.

The default value for the s/Div field is

If acquisitions have been stopped, the oscilloscope uses the 2048

sample points stored in acquisition memory to display the new data on

screen when the sweep speed is changed. This function would normally

be used to zoom in or zoom out on a waveform acquired in Single

(single-shot) mode. Zooming either expands or compresses the

waveform horizontally and is changed by adjusting the s/Div field.

Zoom Example

Select the s/Div field and turn the knob to set the sweep speed to 200

ps/Div, then touch the Stop Key to stop acquisitions. Now turn the

knob to change the sweep speed and notice how the acquired

waveform expands and compresses.

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