Tektronix 071-0957-03, User Manual

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Horizontal Controls
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TDS3000B Series User Manual
Delay Interactions. The maximum delay setting is a function of the
time-base setting and acquisition resolution. If you set a large
positive or negative delay, that amount of delay might be automati-
cally reduced if you make the following additional control changes:
H
Change to a faster time-base setting
H
Change from Fast Trigger to Normal acquisition resolution
If the delay reduction occurs, it may cause the waveform horizontal
position to shift.
Negative Delay. You can select up to ten divisions of negative delay.
At the fastest time base settings, you can use negative delay to see
more of the waveform that occurs before the trigger point.
Roll Mode Display. To obtain a rolling display similar to a strip-chart
recorder, turn off zoom and delay, select the Auto trigger mode, and
set the horizontal SCALE control to 40 ms/div or slower. Subsequent
changes to the horizontal SCALE cause the roll-mode display to
erase and restart.