Keysight Technologies P Series Programming Manual page 173

[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.
Example
MEAS2:POW:AC? -70DBM,1,(@1)
Keysight N8262A Programming Guide
MEASurement Commands
This command queries the lower window/
upper measurement of Channel A, using an
expected power level of -70 dBm and a
resolution setting of 1.
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