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Re: Intensity Pro connection to Broadcast Monitor

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Jay Lee
Re: Intensity Pro connection to Broadcast Monitor
on Mar 8, 2010 at 6:53:17 pm

Good morning,
I'm attempting to understand the ramifications and differences (if any) of monitoring Apple Color 1.5 via Intensity Pro to a JVC LCD Broadcast monitor Component verses DMI?
Are there any pros or cons with going with one connection over the other? Color space or other issues?
What gives the most accurate output?

Also, regardless of connection Apple Color output when working in 'Floating Point' via the Intensity Pro is unusable. Jaggy distorted image. Improved by switching to 16-bit but why?

Source material is 10-Bit Uncompressed QT NTSC SD

All thoughts most appreciated.

Cheers,

J



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Fred Jodry
Re: Intensity Pro connection to Broadcast Monitor
on Mar 8, 2010 at 9:09:27 pm

RE: = (My single crude answer`s guess is at the bottom).

Intensity Pro connection to Broadcast Monitor
by Jay Lee on Mar 8, 2010 at 1:53:17 pm

Good morning,
I'm attempting to understand the ramifications and differences (if any) of monitoring Apple Color 1.5 via Intensity Pro to a JVC LCD Broadcast monitor Component verses DMI?
Are there any pros or cons with going with one connection over the other? Color space or other issues?
What gives the most accurate output?

Also, regardless of connection Apple Color output when working in 'Floating Point' via the Intensity Pro is unusable. Jaggy distorted image. Improved by switching to 16-bit but why?

Source material is 10-Bit Uncompressed QT NTSC SD

All thoughts most appreciated. Cheers, J

A: = Be sure spread spectrum is turned off on your motherboard and the cable from your reference synch source is running good clean signal.





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Jay Lee
Re: Intensity Pro connection to Broadcast Monitor
on Mar 8, 2010 at 11:57:47 pm

Thank you for your response Fred. Would you care to elaborate. No mention of this BIOS setting in regards to Mac OS X systems?

Regards,

J



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Fred Jodry
Re: Intensity Pro connection to Broadcast Monitor
on Mar 9, 2010 at 12:30:50 am

Jay, if you have a "PC" motherboard ( new Intel or Athlon 64 processor based motherboard) running your Mac Operating System, it may have a frequency wobbler called, "spread spectrum" that you can turn on and off in the computer`s setup bios. A Motorola processored power pc (G5 and previous) probably never has it. Spread spectrum`s wobbling of the main clock frequency 1/4% sometimes gets past the steady crystal controlled buffers of the output cards. This problem is not likely, but mentionable. More likely, there`s something wrong that you can find if you make the video output into analog then examine, synchronization and all, on an oscilloscope with the oscilloscope`s display showing say, about two horizontal scans and the oscilloscope`s synchronization input running off an independent steady source (clock or synch generator). Sometimes a bad input/ output video/ synch level reeks the havoc even though the frequency isn`t wobbling, such as if the video or synch is two volts instead of 3/4 of a volt or so, or if frequency distortion turns a square- edged synch pulse into two peaks, or if the synchronization pulse is way too small. There are other possibilities so keep asking other people ("If you check something wrong twice but it isn`t wrong, it isn`t that. Check something else.") but we can check here tomorrow if someone doesn`t fix things overnight. For now for me, nearly bedtime.


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