On the topic of sound cards, I was wondering what the advantages are to using the IQ output of the KX3 as opposed to feeding the headphone jack into the input of the soundcard? I believe the IQ output requires stereo input to work, but what are the advantages? I have seen on this list quite a few people with radios that have an IQ output still use the headphone output to decode the digital modes. I am under the impression that the PX3 can display a 200KHz slice of the RF spectrum using the IQ outputs whereas the best I can get out of fldigi is about 4KHz. Is there any way to coerce fldigi to display a wider chunk of the band? I am running fldigi on Linux.
John KD8CIV On Sun, 2016-04-10 at 14:56 -0400, Don Wilhelm wrote: > George, > > You laptop may have only a mono input for the mic/line-in, but for > digital modes, only one channel is used, so it should work - just be > sure to turn off sounds from your OS so those are not transmitted on the > air. > > A simple and inexpensive USB soundcard can eliminate the problem of > sounds from the OS. Just make certain the USB soundcard is *not* the > default sound device. > > For digital modes, you do not need an expensive interface. Yes, some > provide ready made cables to connect with your radio, some have galvanic > isolation on the audio lines, and some provide PTT to the transceiver, > but VOX works just great with the KX3 for digital modes (you don't need > PTT). > > The big difference between soundcards (including those built into > interface boxes) for digital modes is the noise floor of the soundcard. > You mentioned Signalink, and while popular, it is not the best interface > available. > > Try your laptop internal soundcard before buying anything else, it may > be all you need. > > 73, > Don W3FPR > > On 4/10/2016 2:09 PM, George_yv5wz wrote: > > Thank you Don! > > > > So you mean I don't need to buy anything just my laptop....that's > > interesting! > > > > however, I'm kind of confuse....why so many brands of expensive interface > > sound card....does it represent any better signal or any using interface > > ?....I mean 100 Box (signlink) against simple USB soundcard (12 box) > > .....does it really matter? > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
