Tektronix CSA7154, Руководство пользователя

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Acquiring Waveforms
3- 24
CSA7000 Series, TDS7000 Series, & TDS6000 Series Instruments User Manual
H
The Horizontal Delay that you set determines the time from the trigger point
to the Horizontal Reference.
H
The horizontal scale and waveform record length (number of samples) that
you set determines the horizontal size of the window relative to any
waveform, allowing you to scale it to contain a waveform edge, a cycle, or
several cycles.
Sample interval
First sampled and
digitized point in record
Horizontal reference
Trigger point
Horizontal delay
Horizontal
acquisition
window
Horizontal position
Figure 3- 4: Horizontal Acquisition window definition
Horizontal Scale Versus Record Length Versus Sample Interval Versus Resolution.
These parameters all relate to each other and specify the horizontal acquisition
window. Because the horizontal acquisition window must fit in the 10 horizontal
division display, for most cases, you just set the duration of the horizontal
acquisition window (10 divs x the scale setting) as described in (1) below. By
also setting a record length in samples, you indirectly set the resolution/sample
interval/sample rate for the horizontal acquisition window (waveform record).
The relationships between these horizontal elements for 10 division waveforms
follow:
1.
Time Duration (seconds) = 10 divs (window size) x Horizontal scale
(sec/div)