Hi, I was exchangin idea with a couple of members off-list and an idea came to me about how to time stamp the frames. It would require a minor modification to the WWV transmission but it wouldn't be much. Have the WWV transmitters sign each 'tick' of the clock and have a WWV receiver in the vcr. This would allow time stamping the frame with a signed reference that could be checked. ____________________________________________________________________ | | | The most powerful passion in life is not love or hate, | | but the desire to edit somebody elses words. | | | | Sign in Ed Barsis' office | | | | _____ The Armadillo Group | | ,::////;::-. Austin, Tx. USA | | /:'///// ``::>/|/ http://www.ssz.com/ | | .', |||| `/( e\ | | -====~~mm-'`-```-mm --'- Jim Choate | | ravage@ssz.com | | 512-451-7087 | |____________________________________________________________________|