Posted by Bill Fright on 11/13/07 18:18

Rick Merrill wrote:
> Bill Fright wrote:
>> Thank you Larry,
>>
>> I had an av guy tell me that the digital switcher was half responsible
>> for a 15 frame sync error on a vga projector. I pretty much knew it
>> was the Folsom but he insisted the switcher added 6 frames or so.
>>
>> Thanks again,
>> Bill
>>
>>
>> Larry in AZ wrote:
>>> Waiving the right to remain silent, Bill Fright
>>> <billfright@austin.rr.com> said:
>>>
>>>> Has anyone here heard that digital non-syncronous switchers create a
>>>> 6 frame delay? I've never seen it and was wondering if anyone here has.
>>>
>>> Usually one frame, or perhaps only one field, depending on design.
>>>
>>> Those handling high resolution inputs, such as computers could delay
>>> up to two frames, but that's at a higher frame rate.
>>>
>
> What are you switching? NTSC, PAL, MPEG transport stream, 1394...?

whoops sorry. The folsem is making a switch between VGA (laptop
powerpoint) to the switcher NTSC. The folsem itself would freeze
whatever source it was leaving behind for a half second as well.

I could run the vga into the digital non-syncronous switcher except it
makes the power points look too fuzzy.

I'm thinking this setup needs dual projectors.

Thanks in advance.
Bill

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