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How to increase the max frequency that can be seen using the parallel port of the PC?

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elexhobby

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Can somebody suggest a way to increase the max frequency that can be seen using the parallel port of the PC. I have connected ADC o/ps to parallel port. But the max freq i can view is 10kHz.
 

Re: PC based CRO

Read the port using a DOS program (real DOS not a windows command prompt), perhaps with interupts disabled.

Alternativly use an external circuit with buffer memory and use ECP mode.

Remember that under windows even if you manage 10KHz there will still be periods of
tens of millseconds when some other program is running instead of yours.

Related thread on another forum
http://visualbasicforum.com/showthread.php?t=201855
 

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