2 MEASurement Commands
142 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.
3
N1912A only.
Example
Error Messages
• INITiate:CONTinuous must be set to OFF on both channels, otherwise
error –213, “INIT ignored” occurs.
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 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).
(@1),(@2)
3
(@2),(@1)
3
(@1),(@1)
(@2),(@2)
3
Item Description/Default Range of Values
READ2:RAT? DEF,1,(@1),(@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.
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