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How to make a noise filter for 27 Mhz clock from Mpeg dec.?

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nachin

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how to make a noise suppressor

Hello,

I´m trying to modify a Philips SAA7215HS with an SDI (Serial Digital Interface) output. Pins 128, 131-137 are data lines and the pin 126 is the 27 Mhz clock to sync the signal.

I have noise in the sync line and need to "clean it". I have try a 100ohm resistor in sync line and a 27-47cp Cap. from ground to sync but doesn´t work.

Any suggestion?

Nacho.
 

how to create a noise filter

What kind of 'noise' do you have on the clock pin? If it is jitter, filtering is of no help. Then you have to find out why the clock itself is jittering.
 

how to make a noise filter

Can I stop this jitter? How?

Actually I have a cable directly from pin 126 to this board

**broken link removed**

Nacho.
 

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