Iwatsu DS-8814, Operation Manual

Page: 47 / 141

28
Acquisition menu
ACQUISITION
ACQUISITION
mode setting
EQU Sample
setting
Roll setting
Averages the same sample point data on the time axis by plural sweeps
and displays the averaged waveform. The averaging times (count)
can be set by the menu. Averaging can reduce random noise in the
signal.
Normal sampling
(Norm Smpl)
Peak detect
(Peak Det)
Averaging
(Average)
Displays the acquisition menu.
Sets various functions related to waveform capturing.
(
See page 50 in Section 2 for details .)
Selects from the following 3 functions. At the top right of the screen,
the selection conditions of [Smpl] [Peak] [Avg] are shown.
Samples the input signal in sweep rate related period.
Always samples the input signal at 5 ns/sec regardless of the sweep
rate, and displays the waveform with Min/Max peak values between
the sweep rate related sample period.
Peak detect can capture glitches without missing events that cannot
be captured by normal sampling.
Sets the equivalent sampling ON or OFF.
When ON, detects the trigger position of the captured waveform with
a time resolution quicker than the sampling cycle and superimposes
it on the waveform, increasing the apparent sampling speed (max. 10
GS/s). This setting is used to observe repetitive signals.
Sets roll mode ON or OFF.
Displays the waveform in real time when ON. Set to ON to roll
incoming data continuously across the screen. Roll is useful for
continuously observing low frequency signals. The waveform can be
output simultaneously to the built-in printer.
Note: The sweep mode function is varied when roll is ON. (See page
20.)
Persist
setting
Sets persistence ON or OFF. (Can also be set with the PERSISTENCE
button.)
The captured waveform is overwritten on the display when ON. Persist
Length
setting
Sets the memory length to Short (1 k word) or Long (100 k word).
Note: Some functions and operations vary depending on the memory
length. See page 55.