These handy little boards are designed to fit inside most common SCART cables and convert composite video to clean sync. Ideal for users of monitors or RGB switches (such as an Extron Crosspoint) that require a clean sync signal, or for XRGB3 users. These sync in SCART boards are much cheaper and much tidier than buying an external sync cleaner such as a Sync Strike. For full fitting instructions see this page.
Please note that the LM1881 outputs TTL-level sync. This is fine for devices like the Extron Crosspint, but If you are connecting to a device that’s expecting 75 ohm video-level sync (e.g OSSC or any consumer television with SCART input), then you must add a 470 ohm, 1/4 watt resistor to the output line. Usually, there’s no need to use a sync stripper with these particular devices however.
As seen and briefly reviewed on mmmonkey.co.uk (scroll to the bottom of the page).