Video not in sync on external monitor

Hi-
I have Final Cut Pro 4, with the computer hooked to a DVCAM deck via firewire. The deck is hooked up to an external Sony NTSC monitor via BNC cables. When logging and capturing, I can see the video on the external monitor and it looks fine. However, when I playback video from the timeline, the video on the external monitor is out of sync- it looks like there are rainbow colored bars moving across the screen from left to right, and the picture is all swirly (not a great technical description I know). I checked the suggested settings in FCP and they seem ok, except that I could not find the option to View- Refresh A/V Devices in the menu list. If anyone has any ideas on what I should be looking for, don't know if it's the deck or the monotor or FCP, I'd appreciate any input. Thanks!!

Well... your sync issue is likely that you do not have powered external speakers and some sort of mixer attached to the dvcam deck.
The other stuff? Dunno.

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