Tektronix TDS5000B Series, Онлайн руководство пользователя, Страница: 115 / 420

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ƒ You can push RUN/STOP to terminate a FastFrame sequence. If any frames were acquired,
they are displayed. If no frames were acquired, the previous FastFrame waveform is
displayed.
ƒ Because FastFrame introduces additional processing time into the operation cycle of acquire,
process, and display, it is best to use Single Sequence Acquisition (see Acquire menu, Stop
After menu). With Single Sequence selected, you will see the current acquisition sequence;
otherwise, the display lags the current sequence by one sequence. You can also see the current
sequence by pushing the RUN/STOP button to stop the acquisition.
ƒ
FastFrame greatly reduces the minimum trigger holdoff time, enabling you to acquire and
store records at rates of up to 225,000 captures per second (until the number of frames
requested has been acquired). FastAcq mode also provides exceptionally fast acquisition rates.
Both modes have advantages. FastFrame preserves the actual data associated with each trigger
event for further analysis or visual inspection, but only acquires at the fast rate for short bursts
of time. FastAcq mode combines the data from all trigger events into a single pixel map, but
can acquire at exceptionally fast rates continuously, not just for short bursts.
ƒ In single sequence acquisition mode, statistics are calculated using all frames in the current
acquisition except for Average and Envelope frames. If the currently selected frame is the
Average or Envelope Frame, measurements are taken on the frame but statistics are still based
on all frames excluding the Average and Envelope frames. Statistics reset with each new
single sequence acquisition.
ƒ On a reference waveform, statistics are derived from all frames in that reference waveform
when Fast Frame is on. If Fast Frame is off, the statistics reflect only the first frame that is
displayed.