Error Summary table (DOCSIS 4.0 Downstream)
The table contains signal quality metrics of the signal. This data can be averaged over multiple measurements and can also be queried programmatically through a .NET API interface. This topic contains the following information:
- Available Error Summary Data
- Averaging and Error Summary Data
- Using Band Power markers to limit Error Information
- Querying summary table data results programmatically
Available Error Summary Data
A list of the available error data is provided in the Available Error Summary Data topic, which also links to detailed descriptions for each error result.
A displayed value of "***", "-780dB" or "-999" means no data is available.
Averaging and Error Summary Data
When averaging is on, averaging is applied to the numeric error data in the symbol/errors table with the following exception. Averaging applies only to peak EVM, peak magnitude, and peak phase error data for the Peak Hold/Continuous Peak Hold averaging types.
Error data from the current scan is not included in the average if any of these conditions exist:
- Pulse Not Found
- Sync Not Found
- Carrier Unlock.
- DATA?
- Pulse too Short
For more information see Averaging with Digital Demodulation.
Querying summary table data results programmatically
To programmatically query the Trace Summary Table data results using the Summary() and SummaryUnit() methods in the MeasurementData object.
See the How To Query Summary Table Data Results topic for more information.
See Also
Symbols Table
