MEASurement Commands 2
N1911A/1912A P-Series Power Meters Programming Guide 157
[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
– INITiate:CONTinuous must be set to OFF on both channels, otherwise error
–213, “INIT ignored” occurs.
–If TRIGger:SOURce is set to BUS or HOLD on either channel, error –214, “Trigger
deadlock” occurs.
– If the resolution parameter is not the same as the current resolution setting on
the specified window, error –221, “Settings conflict” occurs.
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)
[c]
(@2),(@1)
[c]
(@1),(@1)
(@2),(@2)
[c]
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.
Item Description/Default Range of Values
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