|
Macrovision is inserted in the vertical sync space as a series of white video dashes at about 140 units of video. They time in and out on the insertion which explains why your set wonks out and then returns to normal for a bit. When your ancient set sees it, the AGC kicks in and collapses the video to take the 140 down to 100 units of video. This in turn collapses the underlying 40 units of sync down to something unuseable by your set. About 20 units or so and not enough to give you a good pic.
One old cheap solution is to find an old Betamax. Very old. They inserted new sync on the output and that will help the issue. Send your air/cable/video signal to the Betamax and use its output as RF 3/4 for your set.
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
|