If you’ve had trouble timing a GVG Turbo hard disk recorder in an analog video system this might come as news to you, Grass Valley never implemented the timing functions with analog video.Yes, even though there is a menu for horizontal timing, these settings do not apply to the analog video coming down the DVI-I connector. In order to time a Turbo with a switcher and other devices, you have to run the Turbo through a frame synchronizer or TBC.