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Capturing Data
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Capturing Data
Once signals 8 and triggers 27 are defined, you can capture a new buffer of data at any time by
pressing the 'Run' or 'Auto Run' buttons. If you tire of waiting on a trigger or it triggers but you tire of
waiting for it to fill up the buffer, you can STOP the capture to transfer the capture buffer to the
screen. When transferred to the screen, the capture is also stored in the capture history for later
analysis (based on Acquisition settings 53 ).
Preview - This mode will automatically transfer data to the PC repeatedly even if a
trigger condition has not been defined. This mode is very useful to Monitor signals while making
connections and only utilizes a small portion of the hardware buffer. In this mode, the buffer size
and duration of data collection is adjusted automatically to provide a "peek" of the logic activity
and is not intended for normal data analysis. The result is a virtual "LIVE" mode that does not try
to search the data (Auto Search windows) or store the data in the capture history. The data
displayed will be discarded when the results of a normal Run (single shot) or Auto Run are
displayed.
Auto Run - This will "ARM" the hardware, wait for the trigger condition, automatically
transfer the data to the PC when the buffer is full and automatically re-arm to repeat the process
until the Stop or Halt button is pressed. If you are waiting on a Trigger condition that you expected
to occur, you can select the "Stop" button to view the data already collected in the pre-fill portion of
the hardware buffer (see Analyzer Options 49 ).
Run - This will "ARM" the hardware and automatically transfer the data to the PC
when the buffer is full. If you do not want to wait for a long capture, you can select the "STOP"
button to force a transfer of the current data captured. If you are waiting on a Trigger condition
that you expected to occur, you can select the "Stop" button to view the data already collected in
the pre-fill portion of the hardware buffer (see Analyzer Options 49 ).
Stop - This will halt the capture and transfer whatever was captured to the PC for your
analysis.
Halt - This will reset the hardware and abort the capture without changing the data
currently being analyzed. When the halt button is pressed, no data is transferred to the screen or
the Capture History.
When you click on 'Run' (or Auto Run), you are actually arming the trigger circuit. Upon trigger, the
hardware allows the buffer to continue past the pre-fill point and to continue filling up (post-fill). Once
the buffer is full, it is transferred to the PC. After the buffer is transferred, the hardware immediately
resets and begins pre-filling in preparation for the next RUN. In Auto Run mode, the next Run starts
automatically.
· Hardware Status 63
· Capture History 64
? 2014 TechTools
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