Getting Started Guide
LM10Zi-GSM-E Rev A
75
Single-shot Sampling Mode
A single-shot acquisition is a series of digitized voltage values sampled
on the input signal at a uniform rate. It is also a series of measured data
values associated with a single trigger event. The acquisition is typically
stopped a defined number of samples after this event occurs: a number
determined by the selected trigger delay and measured by the
timebase. The waveform's horizontal position (and waveform display in
general) is determined using the trigger event as the definition of time
zero.
You can choose either a pre- or post-trigger delay. Pre-trigger delay is
the time from the left-hand edge of the display grid forward to the
trigger event, while post-trigger delay is the time back to the event. You
can sample the waveform in a range starting well before the trigger
event up to the moment the event occurs. This is 100% pre-trigger, and
it allows you to see the waveform leading up to the point at which the
trigger condition was met and the trigger occurred. (The instrument
offers up to the maximum record length of points of pre-trigger
information.) Post-trigger delay, on the other hand, allows you to
sample the waveform starting at the equivalent of 10,000 divisions after
the event occurred.
On fast timebase settings, the maximum single-shot sampling rate is
used. But for slower timebases, the sampling rate is decreased and the
number of data samples maintained.
The relationship between sample rate, memory, and time can be simply
defined as:
Capture Interval = 1
/
Sample Rate
X
Memory
and
Capture Interval
/
10 = Time Per Division