Acquisition Modes 7
InfiniiVision 7000B Series Oscilloscopes User’s Guide 227
Acquisition Modes
The InfiniiVision oscilloscopes have the following acquisition modes:
• Normal — for most waveforms (with normal decimating at slower sweep
speeds, no averaging).
• Peak Detect — for displaying narrow pulses that occur infrequently (at
slower sweep speeds).
• Averaging — for reducing noise and increasing resolution (at all sweep
speeds, without bandwidth or rise time degradation).
• High Resolution — for reducing random noise (at slower sweep speeds).
Realtime sampling (where the oscilloscope produces the waveform display
from samples collected during one trigger event) can be turned off or on
in the Normal, Peak Detect, and High Resolution modes.
(For information on the XY horizontal mode see “XY Time Mode” on
page 66.)
At Slower Sweep Speeds
At slower sweep speeds, the sample rate drops because the acquisition
time increases and the oscilloscope’s digitizer is sampling faster than is
required to fill memory.
For example, suppose an oscilloscope’s digitizer has a sample period of
1 ns (maximum sample rate of 1 GSa/s) and a 1 M memory depth. At that
rate, memory is filled in 1 ms. If the acquisition time is 100 ms
(10 ms/div), only 1 of every 100 samples is needed to fill memory.
Selecting the Acquisition mode
To select the acquisition mode press the [Acquire] key on the front panel.
Normal Mode
In Normal mode at slower sweep speeds, extra samples are decimated (in
other words, some are thrown away). This mode yields the best display for
most waveforms.
To Next Page
Loading...
Need help?
General
