----- Original Message ----- From: "Dave Sparks" <dspa...@pobox.com> To: <digitalradio@yahoogroups.com> Sent: Saturday, October 24, 2009 7:55 PM Subject: Re: [digitalradio] PSK500 **Minimum SNR - Fast vrs. Slow PSK Modes**
> If you go much above a 2 Khz bandwidth, you're going to start ruling out a > lot of rigs that don't have the audio bandwidth to pass that wide of a > signal. I wonder how PSK 2000 would compare with esisting modes, such as > Olivia 32/2000 and MT63 at 2 Khz bandwidth. > > BTW, your figures seem to indicate that the product of gain times > bandwidth > is roughly a constant in an entire HF system, just as it is in a > transistor > amplifier. I should hame mentioned Olivia 64/2000, instead. I seem to remember that FLARQ won't work with Olivia for some reason, but I'm not sure about jPSKmail. Reading the specs on these modes, they actually sound a lot like spread spectrum. -- Dave Sparks AF6AS Riverside, CA, USA (DM13gw)
