Keysight Technologies 3458A Guide D'utilisation page 446

D Optimizing Throughout and Reading Rate
Comparison of ACV modes
With all three ACV modes of operation, the user has the option of selecting
accuracy versus speed if the input frequency allows. Referring to
frequency dependency of the reading rate is most pronounced for analog ACV: 1
reading per second from 10 Hz to 1 kHz, 10 readings per second from 1 kHz to 10
kHz, and 50 readings per second from 10 kHz to 2 MHz. These reading rates
pertain to the specified accuracies for analog ACV. The reading rates of all three
modes of operation can be increased by selecting either less resolution or by
decreasing the delay time from the default times to a time interval of ten times the
reciprocal of the highest frequency component present on the input signal. Hence,
to capture a signal of 1 kHz, a delay time of at least 10 ms is needed for a
representative measurement of the wave form.
Figure D-4
Table D-2
446
Signal path block diagram offers three techniques for ACV
measurement
Compares the ACV modes
Bandwidth
Best Accuracy
Reading Rate
Crest Factor
Waveforms
Analog
10 Hz to 2 MHz
300 ppm
50 rdgs/s
5:1
All
Synchronous
1 Hz to 10 MHz 20 Hz to 10 MHz
100 ppm
10 rdgs/s
5:1
Repetitive
Keysight 3458A User's Guide
Table D-2, the
Random
1000 ppm
40 rgds/s
5:1
All