Originally posted by 99blacksesport:
Kinda like taking a macrovision VHS tape, sending the signal to the TV, then taking the TV's output and sending it to another VCR, effectively bypasing the macroguard.



Macrovision is transmitted along with the signal, the frequency is just outside of the visible frequency but within the transmitted frequencies so you can't see it but it's always there. Some VCRs just don't have the auto gain adjust that Macrovision exploits so they are immune to the method.