impedance matching in high speed digital signals

[dilan2005]

hi,

i have a problem of signal distortion as i think this is due to poor matching.this post is relevant my previous post



i need to know the techniques to matching these lines.(pixel clk,vref ,href) in the image i have attached the current setup.where i use two resistors as the voltage divider.

unfortunately i was unable to find the output impedance of the ov7620 cam module(not available on the datasheet).


please help me

thanks a lot!

rgds
dilan

 

[Iouri]

Can you scope those pins and attach image here?
is those resistors are populated on the boards?
Please advise

 

[FvM]

The circuit would work much better with series resistor at the camera module and the divider at the receiver (FPGA) to my opinion.