Calibration[1]:Zero:auto - Keysight Technologies U2040 X-Series Programming Manual

5 CALibration Subsystem

CALibration[1]:ZERO:AUTO

Syntax
CALibration[1]:ZERO:AUTO 0|OFF|1|ON|ONCE
CALibration[1]:ZERO:AUTO?
Description
This command causes the U2040 X-Series to perform its auto-zeroing routine when
enabled. This adjusts the U2040 X-Series for a zero power reading with or without power
supplied to the U2040 X-Series.
When 1|ON is enabled, the zero is maintained by a combination of on-the-fly zero
measurements and temperature compensation. The on-the-fly zero measurements are
applicable only when the U2040 X-Series is in the NORMal measurement mode.
In the AVERage measurement mode, auto-zeroing is triggered by an internal timer 24
hours after the last zeroing.
0|OFF can be set to disable auto-zeroing.
The query returns the zeroing state.
Ensure that the U2040 X-Series is not connected to the RF source when performing zeroing
NOTE
in the average mode.
Example
CAL:ZERO:AUTO ONCE
Reset condition
On reset, auto-zeroing is disabled.
Error messages
– If zeroing was not carried out successfully, error –231, "Data questionable;ZERO
ERROR" occurs.
– If CAL:ZERO:AUTO is set to ON while CAL:ZERO:TYPE is set to EXT, error
–221, "Settings conflict" occurs.
112
Causes the U2040 X-Series to perform a zeroing routine
on Channel A.
Keysight U2040 X-Series Programming Guide