Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent 5990-5817EN Using Oscilloscope Segmented Memory for Serial Bus Applications - Application Note c20140829 [9]

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Keysight Technologies
Using Oscilloscope
Segmented Memory for
Serial Bus Applications



                          Application Note
Introduction

   If the signals that you need to capture on an oscilloscope have
   relatively long idle times between low duty cycle pulses or bursts
   of signal activity, such as packetized serial data, then using a
   scope with segmented memory acquisition can effectively extend
   the amount of time and the number of serial packets that can be
   captured at a higher sample rate.

   All oscilloscopes have a limited amount of acquisition memory.
   And you should be aware that a scope's memory depth
   determines the amount of waveform time and the number of
   serial packets the scope can capture at a particular sample rate.
   Although you can easily set a scope's timebase to a very slow
   time/div setting in order to capture very long time-spans and lots
   of serial packets, scopes will automatically reduce their sample
   rates once the maximum time-span at the scope's maximum
   sample rate has been exceeded. When a scope's sample rate is
   reduced, it can no longer provide precision horizontal and vertical
   waveform detail (based on the scope's specified bandwidth and
   maximum sample rate).
In the case of the Keysight Technologies, Inc. InfiniiVision 3000 and 4000
X-Series scopes, the maximum memory depth is 4 M points and the maximum
sample rate is 5 GSa/s. This means that the maximum amount of continuous
time that the scope can capture while still sampling at the scope's maximum
sample rate of 5 GSa/s is 800 

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