Keysight Technologies 3458A Guide D'utilisation page 288

6 Command Reference
Power-on register values = all registers are set to 0 with the following exceptions:
DEGREE = 20
SCALE = 1
PERC = 1
Remarks
– The FILTER, RMS, STAT, or PFAIL math operations are performed on all
– When two real-time math operations are enabled, operation_a is performed on
– When a real-time math operation is enabled, the display's half digit becomes a
– Math registers may be written to with the SMATH command. Math registers
– Query command: The MATH? query command returns two responses,
– Related commands: MMATH, RMATH, SMATH
Example
The following program performs the real-time NULL math operation on 20
readings. After executing the NULL command, the first reading is triggered by line
50. The value in the OFFSET register is then changed to 3.05. The 20 readings are
triggered by line 90 and 3.05 is subtracted from each reading.
10 OPTION BASE 1 !COMPUTER ARRAY NUMBERING STARTS AT 1
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subsequent readings. However, whenever the multimeter's configuration is
changed, the previous math results are erased and the operation starts over on
the new readings. All other math operations stay enabled until you set MATH
OFF, execute the MATH command specifying other math operation(s), or
enable post-process math operation(s) (except MMATH PFAIL or MMATH STAT
as described under the MMATH command).
the reading first. Next, operation_b is performed on the result of the first
operation.
full digit. For example, if you are making 4.5 digit AC voltage measurements
and then enable the SCALE math operation, the display is capable of showing
5 full digits.
may be read with the RMATH command.
separated by a comma, which indicate the enabled real-time math function(s).
Refer to Query commands
REF = 1
RES = 50
near the front of this chapter for more information.
Keysight 3458A User's Guide