Keysight Technologies 3458A Guide D'utilisation page 274

6 Command Reference
%_resolution = (actual resolution/maximum input) × 100
For this example, the equation evaluates to:
%_resolution = (.001/10) × 100 = .0001 × 100 = .01
When using autorange, the multimeter multiplies the %_resolution parameter
NOTE
times the full scale reading of the selected range. The result is the minimum
resolution. The multimeter always gives you at least the minimum resolution
and, in many cases, gives you additional digits of resolution.
Power-on %_resolution = none. At power-on, the resolution is determined by the
NPLC command which produces 8½ digits. (The power-on value for NDIG masks
1 display digit causing the multimeter to display only 7½ digits. You can use the
NDlG 8 command to display all 8½ digits; refer to the
Default % resolution:
For frequency or period measurements, the default %_resolution is .00001 which
selects a gate time of 1 s and 7 digits of resolution.
For sampled ACV or ACDCV, the default %_resolution is 0.01% for SETACV SYNC,
or 0.4% for SETACV RNDM.
For all other measurement functions, the default resolution is determined by the
present integration time.
Remarks
– Query command: The FUNC? query command returns two responses
– Related commands: ACDCI, ACDCV, ACI, ACV, APER, DCI, DCV, DSAC, DSDC,
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separated by a comma. The first response is the present measurement
function. The second response is the present measurement range (this is the
actual range, not necessarily the value specified for max._input). The FUNC?
query command does not indicate the autorange mode. Use the ARANGE?
query to determine the autorange mode. Refer to
front of this chapter for more information.
FREQ, OHM, OHMF, PER, RATIO, NPLC, RES, SETACV, SSAC, SSDC
NDIG command for details.)
Query commands near the
Keysight 3458A User's Guide