One of the reasons it took me so long to try PSK31 is that I was using an old laptop whose sound card was questionable. I didn’t want to go through the hassle of getting all the cables and software only to find that the sound card wasn’t up to the task.
Well, if you’re in the same boat, here’s a tip from David, G3UNA, via the Elecraft mailing list:
I came across this in Elektor which folk might want to try with their sound cards.
You will need to install some software to display the results. The article points to I2PHD but there seem to be several about.
It’s just a 15kHz 555 oscillator with 2 r/c outputs of opposite phase. These are applied to the sound input of your PC, which will then display the results to determine whether the card has the propoer anti-aliasing filters.
It looks fun.
Claude Phillippy says
I’m new to packet. What is the software needed to use with this equipment ?