Robas, Teodor wrote: [...]
> I do not have another oscilloscope around so I can only > guess that the sampling is very low by measuring average > voltage on the CLK inputs of the converter. And that is > quite low about 0.5V when sampling is on, and 0V when off. > A trick you can use: Build a 1000:1 or 1024:1 (easier) divider from cheap 74HC logic D flip-flops or counters, whatever is there. Hang the input to your clock that you want to measure. Divide the output down so you get a few ten millivolts amplitude. Feed this into the sound card of your PC. Install a free FFT program and start it. If there is a 10MHz clock you'd get 10kHz out, if your clock is really only 300kHz your PC would show 300Hz. Now you have one of the cheapest frequency measuring tools possible because the PC is already there. -- Regards, Joerg http://www.analogconsultants.com/ _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
