Tektronix DPO77002SX User Manual

Waveform record
The instrument builds the waveform record
through use of the following parameters:
■
Sample interval: The time between
sample points.
■
Record length: The number of samples
required to fill a waveform record.
■
Trigger point: The zero time reference in
a waveform record.
■
Horizontal position: When horizontal
delay is off, the horizontal position is a
percentage of the waveform record
between 0 and 99.9 percent. The trigger
point and the horizontal reference are at
the same time in the waveform record.
For example, if the horizontal position is
50 percent, then the trigger point is in the
middle of the waveform record. When
horizontal delay is on, the time from the
trigger point to the horizontal reference is
the horizontal delay.
Interpolation
Your instrument can interpolate between the samples it acquires when it does not have all of the actual samples it needs to fill
the waveform record. Linear interpolation computes record points between actual acquired samples by using a straight line fit.
Sin(x)/x interpolation computes record points using a curve fit between the actual values acquired. Sin(x)/x interpolation is the
default interpolation mode because it requires fewer actual sample points than linear interpolation to accurately represent the
waveform.
How the acquisition modes work
Acquisition mode
Sample mode retains the first sampled point from
each acquisition interval. Sample is the default
mode.
Peak Detect mode uses the highest and lowest of
all the samples contained in two consecutive
acquisition intervals. This mode only works with
real-time, noninterpolated sampling and is useful
for catching high frequency glitches.
Hi Res mode calculates the average of all the
samples for each acquisition interval. Hi-Res
provides a higher-resolution, lower-bandwidth
waveform.
Acquisition
DPO70000SX Series User 57

Tektronix DPO77002SX Specifications

General

Brand	Tektronix
Model	DPO77002SX
Category	Test Equipment
Language	English