Good idea, I'll add it to the list of possible future features. I haven't used MTTY, but I assume the X-Y display is like the "plus sign" on the old analog RTTY demodulators of years ago.
Alan N1AL On Mon, 2010-03-29 at 14:47 -0400, Claude Du Berger wrote: > Lyle, could we use the P3 as a X-Y Scope to monitor RTTY signal > as on MMTTY? > > 73 de VE2FK > > ----- Original Message ----- > From: Lyle Johnson > To: elecraft@mailman.qth.net > Sent: Monday, March 29, 2010 2:40 PM > Subject: [Elecraft] P3 and Digital Mode Operation > > > > I've been testing the P3 < URL:http://www.elecraft.com/news.htm > for a > while now, and it has a really nice feature for Digital Modes that my > other panadapter solutions lack. > > The P3 has a SPAN control. This sets the width of the spectrum display > in kHz. When looking at a busy band, for example during last weekend's > contest, this made it pretty easy to spot activity on a relatively quiet > band (15m) or a hole on a very busy busy band (20m). This isn't much > different than other panadapters, just more convenient. > > However, let's say you decide to operate a digital mode, such as PSK 31. > > Dial down the SPAN to ± 3 kHz. Suddenly, the display looks like the > usual "waterfall" you are accustomed to when using DM780, MIXW, > MultiPSK, CocoaModem, etc. You can easily distinguish individual > signals, and see the modulation on them. It is extremely simple to then > set the marker on a signal, tap the control to re-tune, then then tap > the SPOT button on the K3 to get it nailed. You are now ready for a QSO > using PSK-D mode. > > This same feature is also very useful when operating RTTY. Further, the > P3 lets you see nearby signals in fine detail even when you have the > K3's dual passband feature turned on. Use of such narrow filtering on > the K3 restricts the usual waterfall display on the DM780 or MMTTY > console, for example. > > And, the P3 doesn't consume PC screen real estate. > > The reason this works so well with the P3 is that as you adjust the > SPAN, the P3 automatically adjusts its internal filters, sampling rates > and calculations to effectively utilize the display width. If you use > the ZOOM control on PowerSDR with LP-PAN, for example, you just get a > much coarser display as you zoom in because the sampling rate for the > soundcard being used with PowerSDR doesn't automatically adjust as you > change displayed bandwidth. If it did, it has limited rate selections > depending on the soundcard being used and its drivers. Since the P3 > hardware is purpose-built from the outset to be a panadapter rather than > a general spectrum display or a soundcard, it does not have these > limitations. > > 73, > > Lyle KK7P > > Disclaimer: I work for Elecraft. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
