Proc amp/TBC? Fix levels at input to Canpus ADVC110

[2Bdecided]

I have a PAL S-VHS video source with the following voltage levels:

Sync voltage: 258mV (should be 300mV)
Peak white: 702mV (OK)

My Canopus ADVC110 looks at the sync voltage, assumes the video signal needs amplifying, and in doing so clips the highlights! (It works fine with video signals with 300mV sync - it'll happily preserve -52 to 784mV as 0-255; 0-717mV as 16-235; so it's working about right normally).

I either need to
a) restore the sync voltage to 300mV without touching the picture information, or
b) bring the picture information down without clipping and without touching the sync voltage, or
c) capture with something different!

Suggestions?

Cheers,
David.

[yup]

2Bdecided!
Try:
http://www.cypress.com.tw/product.php?PId=63335&CId=004&CName=Digital%20Mixers/Time%20Base%20Correctors&SR=0
This TBC have AGC.
yup.

[2Bdecided]

Thanks yup. The other controls might help, but an AGC is exactly what I don't want - it's the automatic adjustment of the sync pulses up to the correct level, and corresponding scaling of the video, which is causing the clipping.

Cheers,
David.

[2Bdecided]

Any sync restoration without AGC out there?

Cheers,
David.