HP 54710A User's Reference Manual page 83

Acquisition Menu
Record Length
Figure 3-11 shows how the oscilloscope handles the signal if the sample rate
and record length are both in the automatic mode. Because of the time base
scale setting, the oscilloscope picks a sample rate and record length that
optimizes the throughput of the oscilloscope while still displaying most of the
waveform record on the screen. Notice that the oscilloscope picked a sample
rate of 2 GSa/s and increased the waveform record to 1001 points.
1
(1001 Points) = 500.5 ns of data
⁄
GSa
2
s
The same amount of data is stored in the waveform record as figure 3-10,
except that in figure 3-11 the data was acquired at 2 GSa/s instead of
500 MSa/s.
Figure 3–11
Automatic sample rate and automatic record length
3–18