Tektronix TPS2012B, Руководство пользователя

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Reference
The maximum sample rate is 1 GS/s for oscilloscope models with a bandwidth
of 100 MHz and 2 GS/s for the 200 MHz model. At 100 ns and faster settings,
this sample rate does not acquire 2500 points. In this case, a Digital Signal
Processor interpolates points between the sampled points to make a 2500 point
waveform record.
Peak Detect.
Use Peak Detect acquisition mode to detect glitches as narrow as
10 ns and to limit the possibility of aliasing. This mode is effective when the
Horizontal Scale setting is 5
μ s/div or slower.
Peak Detect acquisition intervals (1250)
• Sample points displayed
Peak Detect mode displays the highest and lowest acquired voltage in each interval.
NOTE.
If you set the Horizontal Scale setting to 2.5 μ s/div or faster, the acquisition
mode changes to Sample because the sample rate is suf fi ciently fast to make Peak
Detect unnecessary. The oscilloscope does not display a message to tell you
that the mode was changed to Sample.
When there is enough waveform noise, a typical peak detect display shows large
black areas. The oscilloscope displays this area with diagonal lines to improve
display performance.
Typical peak detect display TPS2000B peak detect display
Average.
Use Average acquisition mode to reduce random or uncorrelated noise
in the signal you want to display. Data is acquired in sample mode, then a number
of waveforms are averaged together.
Select the number of acquisitions (4, 16, 64, or 128) to average for the waveform.
Run/Stop Button. Push the Run/Stop button when you want the oscilloscope to
continuously acquire waveforms. Push the button again to stop the acquisition.
94 TPS2000B Series Digital Oscilloscope User Manual