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SDS6000L User Manual
int. s i g l e n t . c o m 69
12.5M
12.5M
12.5M
25M
25M
25M
50M
50M
50M
125M
125M
125M
250M
250M
500M
Channels 1, 2, 3, and 4 (C1~C4) are in group 1 and 5, 6, 7, and 8 (C5~C8) are in group 2
ï‚Ÿ Single-channel mode: In one group, only one channel is on and in the other group, one channel
or less is on.
ï‚Ÿ Dual-channel mode: In one group, two channels are turned on and in the other group, two channels
or less are turned on.
ï‚Ÿ Four-channel mode: In any group, three or more channels are turned on.
11.2.2 Acquisition
The acquisition mode is used to determine how to acquire and process the signal.
Normal:
The oscilloscope samples the signal with equal time intervals. For most waveforms, the best
display effect can be obtained using this mode.
Peak:
Peak detect mode. The oscilloscope acquires the maximum and minimum values of the signal
within the sample interval so the peak (maximum-minimum) in the interval is obtained. This mode is
effective to observe occasional narrow pulses or spurs with a low sample rate, but the noise displayed
is larger. In peak mode, the oscilloscope will display all pulses with a pulse width longer than 200 ps.
In the following example, a narrow pulse sequence with a pulse width of 3.4 ns and a period of 200 Hz
is sampled at a 5 MSa/s sample rate in normal mode and peak mode. As we can see, because the
sample interval (200 ns) is much larger than the pulse width (3.4 ns), it is difficult to capture the narrow
pulses in normal mode, but peak mode can ensure that each pulse is captured.
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