My SDE24’s closed captioning data seems to be corrupted or missing? What could be wrong?

During some re-configuration operations, the SDE24 may lose its ability to properly encode closed-captioning data. The way to restore this functionality is by power-cycling the Encoder Host chassis by momentarily removing AC line power for 3 seconds, then re-applying power. For best reliability of closed captioning, SDE24 encoders should be power-cycled after the units have been fully configured for their long-term settings.