Keysight N1911A

2 MEASurement Commands
138 N1911A/1912A P-Series Power Meters Programming Guide
[a] The mnemonic DEF means DEFault. This is not equivalent to the DEFault parameter used in the command sub-systems. The parameters must
be entered in the specified order. If parameters are omitted, they default from the right. The parameter DEFault is used as a place holder.
Specifying DEF leaves the parameter value unchanged.
[b] When the measurement result is linear this parameter represents the number of significant digits. When the measurement result is
logarithmic 1 to 4 represents of 1, 0.1, 0.01 and 0.001 respectively.
[c] N1912A only.
Example
Error Messages
– If the last measurement on either channel is not valid error –230, “Data corrupt
or stale” occurs. A measurement is valid after it has been initiated. It becomes
invalid when either a reset occurs or any measurement parameter, for example
frequency, is changed.
– If the expected_value and resolution parameters are not the same as the
current expected value and resolution settings on the specified window, error
–221, “Settings conflict” occurs.
source list This channel list specifies the channels used to calculate the
difference.
If unspecified and the current window setup is a difference
measurement then this difference setup is used, otherwise it
defaults to Channel A-B (N1912A) or A-A (N1911A).
(@1),(@2)
[c]
(@2),(@1)
[c]
(@1),(@1)
(@2),(@2)
[c]
FETC2:DIFF? This command queries the difference
measurement on the lower window/lower
measurement.
Item Description/Default Range of Values