Signal Analysis - SFN Drift Plot
Last Update: Jun 15, 2023

SFN Drift Plot

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Signal Analysis - SFN Drift plot

Supported Devices

Broadcast Standards

ATSC 1.0, ATSC 3.0, ISDB-T/Tb, DAB/DAB+, DTMB, DVB-S/S2

Availble Tools

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Signal Analysis - SFN Drift plot

Description

Transmitter signal SFN Drift is measured as a shift of the signal "framing mark", for example, ATSC 3.0 Bootstrap, over time. It is recommended to use an external source common with the transmitter system 10MHz reference source for the drift precise measurements.

SFN drift history and its instant value are presented in a graphical form on the SFN drift plot.

Available on the plot Set Reference Point? control allows setting the drift calculation start point. The receiver alarm management system can be tuned to trigger an alarm event in case the drift exceeds the Guard Interval set as a modulation parameter.