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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Fri May 29, 2009 1:41 pm Post subject: |
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| tse wrote: | The resolution editor looks like it gives the same answers as the spreadsheet except the vertical front porch and back porch lines are reversed. It's very unusual for the front porch to be larger than the back porch.
Scott |
I always make sure the back porch is larger to gib=ve the beam time to settle down to avoid ringing.
Athanasios
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Thu Oct 28, 2010 6:09 pm Post subject: |
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in the schematic there is a 6.8pf and a 12pf cap are they both to be used in the peaking circuit?
i only see 1 trimmer in the picture of the vim.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Thu Oct 28, 2010 6:37 pm Post subject: |
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| dvh99 wrote: | in the schematic there is a 6.8pf and a 12pf cap are they both to be used in the peaking circuit?
i only see 1 trimmer in the picture of the vim. |
I think the trimer is the 6.8pf cap location. Remember he used spice for the specific resolution he posted in that post so the 6.8pf was the value he needed to get best performance for that super high resolution that approached 240mhz pixel clock.
This is why i suggested to find a small trimmer value. The one you got should be fine.
Now that I am running 96hz refresh rate i need to adjust the peaking circuit for that rate.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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Marquee High Performance Bellows now shipping!!
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