Oscilloscope R eference Acquisition mode
Behavior
A single waveform data point can be made up of several sequentially acquired data points. The waveform
data points can also be created from a composite of sampled data taken from multiple acquisitions. The
acquisition modes determine how the waveform data points are produced from the sampled data.
Sample. This mode creates a record point by saving one or more samples during each acquisition interval
(see page 195). Sample mode is the default acquisition mode. The instrument does no post processing of
acquired samples in this mode.
Pk Detect. Peak Detect mode alternates between saving the highest sample in one acquisition interval
and the lowest sample in the next acquisition interval. Peak Detect mode only works with real-time,
noninterpolated sampling.
Hi Res. High Resolution mode averages all samples taken during an acquisition interval to create a
record point. This average results in a higher-resolut
ion, lower-bandwidth waveform. This mode only
works with real-time, noninterpolated sampling.
NOTE. A key advantage of Hi Res mode is its potential for increasing resolution regardless of the input
signal. The following table indicates that you can obtain up to 15 significant bits with Hi Res mode. Note
that the resolution improvements are limited to speeds slower than 40 ns/div.
Additional resolution bits
2.5 GS/s
8.5 bits
1.1 GHz
1GS/s
9 bits 440 MHz
250 MS/s
10 bits 110 MHz
50 MS/s
11 bits 22 MHz
10 MS/s
12 bits 4.4 MHz
2.5 MS/s
13 bits 1.1 MHz
1MS/s
14 bits 440 kHz
250 KS/s
15 bits 110 kHz
25 KS/s
>15bits 11kHz
250 S/s
>15 bits 110 Hz
DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series 837