XPost: sci.electronics.design   
   From: dachthetniet@net.invalid   
      
   On 2/14/2013 4:33 AM, DaveC wrote:   
   >>    Not if it is a video clock, to a fixed frequency monitor.   
   >   
   > I learned a little more about this circuit.   
   >   
   > It's a proprietary video card card from a piece of German offset printing   
   > equipment.   
   >   
   > I used a sig. gen. in place of the crystal. The circuit generated a video   
   > signal without any data (just sync pulses). The video card is separate from   
   > the system processor, so being on the bench the card has no data to display.   
   >   
   > Viewed on a scope, varying the 8.867 MHz frequency doesn't change the video   
   > signal at all.   
   >   
   > I'm guessing (with my limited understanding of how video works) that the   
   > 8.867 runs the dot clock, basically how fast the dots are shoved out of the   
   > data bus into the video generator IC.   
   >   
   > So, how critical *is* this frequency?   
      
   You can still buy it in germany.   
   Standardquarz, Grundton, 8,867238 MHz 0.18 euro (0.24 us dollar)   
      
      
   https://secure.reichelt.de/Crystals-Quartz/8-8672-HC18/3/index.h   
   ml?;ACTION=3;LA=2;ARTICLE=3520;GROUPID=3173;artnr=8%2C8672-HC18;   
   ID=11UNXklX8AAAIAAA-vdIc96bf9a2d5cb50299c3e3c87380e0d4b7   
      
   Minimum order 10 euro.   
   Only drawback is the transport cost :((   
      
   --- SoupGate-Win32 v1.05   
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