Keysight N1911A Programming Manual page 142

2 MEASurement Commands
Item
source list
[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
– If the expected_value and resolution parameters are not the same as the
142
Description/Defaul t
This channel list specifies the channels used to calculate the
ratio.
If unspecified and the current window setup is a ratio
measurement then this ratio setup is used, otherwise it
defaults to Channel A/B (N1912A) or A/A (N1911A).
FETC2:RAT? DEF,1,(@1),(@2)
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.
current expected value and resolution settings on the specified window,
error –221, "Settings conflict" occurs.
N1911A/1912A P-Series Power Meters Programming Guide
Range of Values
[c]
(@1),(@2)
[c]
(@2),(@1)
(@1),(@1)
[c]
(@2),(@2)
This command queries the lower
window/upper measurement ratio
measurement of Channel A over
Channel B, using the current
sensor range and a resolution of 1
on both channels.