Teledyne LeCroy WaveRunner 6 Zi and 12-Bit HRO Getting Started Manual - Manual (Page 68)

WaveRunner 6 Zi and 12-Bit HRO
60 922136-00 Rev A
positioned approximately 5 ps (200 GS/s) apart. 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.
Note : If the processing time is greater than the acquire time, the data in memory
gets overwritten. In this case, the instrument issues a Channel data is not
continuous in ROLL mode!!! warning and rolling starts over again.