Keysight Technologies 3458A Guide D'utilisation page 268

6 Command Reference
%_resolution parameter
.00001
.0001
.001
.01
.1
Power-on % _resolution = not applicable.
Default %_resolution = .00001
Remarks
– The reading rate is the longer of 1 period of the input signal, the gate time, or
– Frequency (and period) measurements are made using the level detection
– The leftmost digit which is a half digit for most measurement functions, is a full
– Readings made with autorange enabled take longer because the input signal
– For frequency (and period) measurements, an overload indication means the
– Related commands: ACBAND, FSOURCE, FUNC, LFILTER, PER, RES
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the default reading timeout of 1.2 seconds.
circuitry to determine when the input signal crosses a particular voltage on its
positive or negative slope. (This is why you cannot use the LEVEL trigger or
sample event or the LINE trigger event when making frequency or period
measurements.) The power-on or default level triggering values select zero
volts, positive slope. You can control the level triggering voltage and coupling
using the LEVEL command. You can specify either the positive or negative
slope using the SLOPE command.
digit (0 - 9) for frequency measurements.
is sampled (to determine the proper range) between frequency readings.
voltage or current amplitude is too great for the specified measurement range.
It does not mean the applied frequency (or period) is too great to be measured.
Selects gate time
1 s
100 ms
10 ms
1 ms
100 µs
Digits of resolution
7
7
6
5
4
Keysight 3458A User's Guide