Use Multicarrier Filter (cdma2000/1xEV-DV)
: Cleared (See cdma2000/1xEV-DV Standard Setups/Presets Table.)
selects either the standard cdma2000/1xEV-DV filter or the multicarrier filter.
: Use the standard cdma2000/1xEV-DV filter.
: Use the multicarrier filter.
In a cdma2000/1xEV-DV system that uses multiple carriers, there are simultaneous signals on adjacent frequency channels. The standard cdma2000/1xEV-DV measurement filter does not completely reject the adjacent frequency channel. Because of this, when analyzing the signal at one frequency, the adjacent channel signal will interfere and cause larger than expected error results, such as EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format..
The multicarrier filter is used to eliminate interference from adjacent channel signals. The advantage of using this filter is that adjacent channels do not interfere with the measurement, thus producing more representative data results. However, the multicarrier filter should only be used for multiple carrier systems and not for single carrier systems. This is because the filter itself is not completely flat and will increase the measurement error results.
Therefore, select the standard cdma2000/1xEV-DV filter for single carrier systems and the multicarrier filter for multiple carrier systems.
See Also
