The DVX 100A should SD video only.. 60i is generally reserved for talking abut HD formats
Either in 29.97 fps or in a 24p mode that generally requires FCP to do a pulldown
It is JUST DV material… and the DV DV Widescreen and DV 24p settings work fine….
If material is strobing on a VIDEO monitor that is hooked up to your computer… but not when you play back the tape… then you have issues with your sequence setting.
If it is just your computer monitor…. then that can be because of the computer monitor and not being interlaced…
If it were your hard drive.. you should be getting a dropped frame warning