Keysight Technologies 3458A Guide D'utilisation page 316

6 Command Reference
PER
Period. Instructs the multimeter to measure the period of the input signal. You can
specify whether the input signal is AC voltage (default), AC+DC voltage, AC
current, or AC+DC current using the FSOURCE command.
Syntax
PER [max._input][,%_resolution]
max._input
The max_input parameter selects a fixed range or the autorange mode. The
ranges correspond to the type of input signal specified in the FSOURCE
command. That is, if ACV is the specified input signal, the max._input parameter
specifies an AC voltage measurement range. To select a fixed range, you specify
max._input as the absolute value (no negative numbers) of the expected peak
value of the input signal. The multimeter then selects the proper range. Refer to
the
type of input signal.
To select the autorange mode, specify AUTO for max._input or default the
parameter. In the autorange mode, the multimeter samples the input signal
before each period reading and selects the proper range.
Power-on max._input = not applicable
Default max._input = AUTO
%_resolution
The %_resolution parameter specifies the digits of resolution and the gate time as
shown below (%_resolution also affects the reading rate, refer to the
Specifications"
316
FUNC or RANGE command for tables showing the ranges available for each
on page 409 for more information).
%_resolution parameter
.00001
.0001
.001
.01
.1
Selects gate time
1 s
100 ms
10 ms
1 ms
100 µs
Keysight 3458A User's Guide
"Appendix A:
Digits of resolution
7
7
6
5
4