You beat me to this answer cbltek1!
The only thing I am doing different is using my Sony off the BNC of my HP so I can monitor both the actual video and the frequency responses.
Mark A. Pickrell
A Brother of the "Truth"!
"Learn to Accept me or Learn to Ignore me"!
This is CABL.com posting #121420. Tiny Link: cabl.co/mFKy