Technical data
MEASurement Commands 2
N1911A/1912A P-Series Power Meters Programming Guide 105
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.
3
 N1912A only.
Example
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)
3
(@2),(@1)
3
(@1),(@1)
(@2),(@2)
3
Item Description/Default Range of Values
CONF1:DIFF:REL DEF,1,(@1),
(@2)
This command configures the upper 
window/upper measurement to make a 
difference measurement of 
Channel A - Channel B with relative mode 
on, using the current sensor range and a 
resolution of 1 on both channels.










