Getting Started Manual
WR6Zi-GSM-E
64
The process of acquiring these bins and satisfying the time constraint is a
random one. The relative time between ADC sampling instants and the
event trigger provides the necessary variation.
The instrument requires multiple triggers to complete an acquisition. The
number depends on the sample rate: the higher the sample rate, the
more triggers are required. It then interleaves these segments (in the
following graphic) to provide a waveform covering a time interval that is
a multiple of the maximum single-shot sampling rate. However, the real-
time interval over which the instrument collects the waveform data is
much longer, and depends on the trigger rate and the amount of
interleaving required.
Note
: RIS mode is not available when the oscilloscope is operating in
fixed sample
or DBI 25 - 45 GHz) modes as covered in
Smart Memory
(available in the online help files) and
Combining Channels
topics,
respectively.
Roll Mode
Roll mode displays, in real time, incoming points in single-shot
acquisitions that have a sufficiently low data rate. The oscilloscope rolls
the incoming data continuously across the screen until a trigger event is
detected and the acquisition is complete. The parameters or math
functions connected to each channel are updated every time the roll
mode buffer is updated, as if new data is available. This resets statistics
on every step of Roll mode that is valid because of new data.
