Some newer revisions of the WS-6906 are incompatible with older "v1.0" firmware dumps. Loading the wrong version can cause the "Lock" light to stay on permanently, rendering the meter useless. Check forums like Satellites.co.uk for community-verified firmware backups if you run into trouble.
This guide outlines the process for upgrading the firmware/software on the satellite finder meter, typically done to update satellite lists, correct bugs, or improve signal locking capabilities. ⚠️ Crucial Preparation satlink ws-6906 software upgrade