3 WLAN Mode
3.6 Modulation Analysis Measurement
Spur Avoidance
NOTE
This control is available when the analyzer has installed Bandwidth Option H1G.
Allows you to eliminate the spur that occurs at -50MHz offset of Center Frequency
on UXA H1G platform. This is an interleaving spur caused by the ADC.
–
Auto: move the spur completely out of analysis bandwidth, the tradeoff is that
the available analysis bandwidth will be reduced to 400MHz. And EVM could be
worse as the edge of passband is used for analysis
–
Manual: move the spur by specified value or turn off this feature by setting the
value to 0
Remote
Command
[:SENSe]:EVM:SAVoid:FREQuency <freq>
[:SENSe]:EVM:SAVoid:FREQuency?
[:SENSe]:EVM:SAVoid:AUTO ON | OFF | 1 | 0
[:SENSe]:EVM:SAVoid:AUTO?
Example
:EVM:SAV:FREQ 50MHz
:EVM:SAV:FREQ?
:EVM:SAV:AUTO ON
:EVM:SAV:AUTO?
Couplings The control is only available for EVM measurement, it will not appear in other measurements
Preset 0 Hz
OFF
State Saved Saved in instrument state
Yes
Range Auto|Manual
Min -(1GHz - BW)/2
Max (1GHz - BW)/2
Cross-Correlated EVM (Remote Command Only)
Cross-Correlated EVM (ccEVM) is a technique applied for RMS EVM to suppress
analyzer noise resulting in lower EVM floor. A 2-channel analyzer, or two analyzers,
demodulate the same signal independently, and perform cross-correlation on the
error vectors to cancel out uncorrelated noise added by the analyzer.
Differences in impedance mismatch and amplitude/phase unflatness between
channels are examples of uncorrelated noise between analyzers.
1073 WLAN Mode User's &Programmer's Reference
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