[hpsdr] PowerSDR Parallel Port

[Kevin - M0KHZ]

Greg - ZL3IX wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Can anyone tell me which parallel port pin is used for PTT and what 
> sense is used (active high or low)?  I have looked in the PowerSDR 
> manual, but all they say is that all 25 pins have to be connected 
> between the radio and the PC.
>
> 73, Greg, ZL3IX
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Hi Greg
It's not that straight forward, the PTT signal is part of a bus data 
stream, have a look at the schematic on my blog, www.m0khz.com look 
under Cumbrian SDR and scroll down to the PIO interface board, there you 
will find a pdf.
Hope this helps.
Kevin - M0KHZ

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