Re: AD9889BBSTZ-165 resitor swing

Hi mattp,

I've seen this thread before,

We are having issue with settiong up right Voltage swing on TMDS lines going out from board,

is there any graph for R_EXT versus current graph or table, We were changing this R_EXT with potneciometer and observe vaweform on scope (results of changes aren't looking linear)?

We are waiting for better osciloscope, at this stage we were looking only on CLK lines only.

Could you advice R_EXT value if PCB has differential impedance around 78 Ohms ?

Thanks