2 MEASurement Commands
114 N1911A/1912A P-Series Power Meters Programming Guide
1
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.
2
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.
Example
Error Messages
• If the last measurement 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.
resolution A numeric value for the resolution. If it is
unspecified the current resolution setting is
used. If a value is entered it should correspond to
the current resolution setting otherwise an error
occurs.
1 to 4
2
1.0, 0.1, 0.01, 0.001
DEF
1
source list The channel which the command is implemented
on. If unspecified the current window setup is
used. However, on the N1912A, if the window
shows a ratio or difference measurement, the
upper window defaults to Channel A and the
lower window to Channel B.
(@1)
(@2) (N1912A only)
Item Description/Default Range of Values
FETC1:REL? DEF,2,(@2) This command queries the upper
window/upper measurement relative
measurement of Channel B, using the
current sensor range and a resolution
setting of 2.
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