All Subframes (Pre-5G)
The All Subframes trace data presents the 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. metric from all subframes contained within the current Result Length. Normally the user changes the Subframe Offset parameter to inspect each subframe for modulation quality metrics and detailed trace results. The All Subframes trace data provides a way to quickly inspect all subframes at once for trends or to identify an outlier subframe needing for deeper analysis.
The All Subframes trace data is only available if Enable All-Subframe Analysis is selected. This operation slows the measurement processing, and is not selected by default.
The EVM metric presented in the All Subframes trace data is always presented as %, and ignores the Report EVM in dB setting.
Traces like All Subframes or Error Vector Time may show"0 Subframes" on the X-Axis, which is relative to the Subframe Offset value. Even though the axis shows Subframe 0, it is displaying the correct result for the Assigned Subframe, which may be non-zero depending on the Signal Radio Frame Offset and Analysis Region Subframe Offset settings.
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