Agilent Technologies 2000 X-Series, Руководство пользователя

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160 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
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Acquisition Control
• Normal — at slower time/div settings, normal decimation occurs, and
there is no averaging. Use this mode for most waveforms. See
"Normal Acquisition Mode" on page 160.
•
Peak Detect
— at slower time/div settings, the maximum and minimum
samples in the effective sample period are stored. Use this mode for
displaying narrow pulses that occur infrequently. See
"Peak Detect
Acquisition Mode" on page 160.
• Averaging — at all time/div settings, the specified number of triggers
are averaged together. Use this mode for reducing noise and
increasing resolution of periodic signals without bandwidth or rise
time degradation. See
"Averaging Acquisition Mode" on page 163.
• High Resolution — at slower time/div settings, all samples in the
effective sample period are averaged and the average value is stored.
Use this mode for reducing random noise. See
"High Resolution
Acquisition Mode" on page 165.
Normal Acquisition Mode
In Normal mode at slower time/div settings, extra samples are decimated
(in other words, some are thrown away). This mode yields the best display
for most waveforms.
Peak Detect Acquisition Mode
In Peak Detect mode, at slower time/div settings when decimation would
normally occur, minimum and maximum value samples are kept in order
to capture infrequent and narrow events (at the expense of exaggerating
any noise). This mode displays all pulses that are at least as wide as the
sample period.
For InfiniiVision 2000 X- Series oscilloscopes, which have a maximum
sample rate of 2 GSa/s, a sample is taken every 500 ps (sample period).
See Also • "Glitch or Narrow Pulse Capture" on page 161
• "Using Peak Detect Mode to Find a Glitch" on page 162