natus Grass S88X, Руководство пользователя и обслуживания

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3-18
Chapter 3
Applications & Capabilities
a
ccuracy
& W
avEform
All timing parameters are crystal
controlled and are accurate to within
±0.00005%. This feature provides
repeatability for the most demanding
applications.
Both the rise and fall times of the
S88X output pulses are approximately
4 microseconds. Calibration of the
duration is based on the average
width of the pulse. Figure 3-3
illustrates the pulse waveform at a
duration of 10 microseconds.
Because of this high accuracy, it is seldom necessary to monitor the
stimulus. However, when complex pulse patterns are produced and until all
basic modes of operation of the S88X are understood clearly, monitoring
the output with an oscilloscope is advised.
Figure 3-4 shows typical pulse
waveforms obtainable with the S88X.
Figure 3-3: Pulse Waveform
Figure 3-4: Typical Stimulus Waveforms
10 sec
150 V
olts
S1
Single Stimulus
S1
Continuous Stimuli
S1
Trains of Stimuli
S2
S1
S1
S1
S2
S2
Trains
with
Post
Train
Stimulus
S1
S2
Trains S1 - Continuous S2
S1
S2
Pre-train Stimulus followed
by Delayed Train
S2
S1
Same Train Rate - Different Train
Duration and Pulses in each Train
S2
S1
Trains with Mid
Train Stimulus
S2
S1
Same Train Duration and
Rate - Different Number of
Pulses in each Train
S2
S1
S1
S1
S1
S2
S2
Pairs
of
Stimuli
S2