3 Spectrum Analyzer Mode
3.9 SEM Measurement
Offset (Bandwidth)
Enables you to set up the bandwidth measurement parameters for offset pairs. For
example, you can assign the start and stop frequencies, and select the resolution
bandwidth.
Offset Freq Define
Enables you to select offset frequency definition. Each standard defines each offset
frequency from Carrier.
For example, 3GPP2 requires the “Carrier Center to Meas BW Edge” definition. LTE
conformance test requires “Carrier Edge to Meas BW Center” and/or “Carrier Edge
to Meas BW Edge” definition. The MSR standard requires “RF BW Edge to Meas BW
Center” and/or “RF BW Edge to Meas Edge” definition.
“Meas BW Edge” means the edge frequency of resolution bandwidth closer to the
carrier that is represented by Meas BW and Res BW settings. Actual center
frequency of Meas BW and the limit line have ½ Meas BW offset when the Meas BW
Edge is selected.
Note that the outermost (lowermost, uppermost) carrier at each side is determined
by which carrier edge frequency is located outermost within the RF BW or each sub-
block bandwidth, instead of which carrier center frequency is located outermost.
See also "Diagrams for Offset Freq Define" on page 1628.
Spectrum Analyzer Mode User's &Programmer's Reference 1625
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