Agilent Technologies E6640A EXM Instrukcja Obsługi Strona 195

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Chapter 13 195
GSM/EDGE Programming Commands
EDGE Error Vector Magnitude (EVM)
GSM/EDGE Programming Commands
IQ Imbalance Results
The IQ Imbalance result (a double) is a value in dB, calculated from Gain Imbalance and Quadrature
Skew.
IQ imbalance is part of the EDGE EVM results, but to preserve backwards compatibility with earlier
versions of firmware it is not included in the general results list. It can be queried using the command:
:FETCh:LSEQuencer:ACQuire{1:512}:ASTep{1:1000}:MEASurement? EEVM,
"IqImbalance"
For example,
:FETC:LSEQ:ACQ{1}:AST{1}:MEAS? EEVM, "IqImbalance"
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