Tektronix MDO3012, User Manual

Page: 82 / 243

Acquire the Signal
Waveform Record
The instrument builds the waveform record through use of the following parameters:
Sample interval: The time between
recorded sample points. Adjust this
by turning the
Horizontal Scale knob
or pushing Acquire and changing the
record length in the Acquire menu.
Record length: The number of samples
required to
fi ll a waveform record. Set
this by pushing the
Acquire button and
using the lower and side menus.
Trigger point: The zero time reference in
a waveform record. It is shown on the
screen by an orange T.
Horizontal position: When Delay Mode
is on, this is the time from the trigger
point to the expansion point. Adjust this
by turning the
Horizontal Position knob.
Use a positive time to acquire the record
after the trigger point. Use a negative
time to acquire it before the trigger point.
Expansion point: The point that the
horizontal scale expands and contracts
around. It is shown by an orange triangle.
Using FastAcq
FastAcq™ provides high-speed waveform capture. It is helpful in fi nding elusive signal anomalies. Fast acquisition mode
reduces the dead time between waveform acquisitions, enabling the capture and display of transient events such as
glitches and runt pulses. Fast acquisition mode can also display waveform phenomena at an intensity that re
fl ects their
rate of occurrence.
To use FastAcq:
1. Push Acquire .
60 MDO3000 Series Oscilloscopes User Manual