You're right. P3E and Eagle will operate similarly to AO-10 and AO-13 on mode B and P3E is similar to AO-13 on mode S. I don't remember making a single S-band contact outside the U.S. on AO-13. The advantage of mode B is that it works with large off-pointing angles and that is what is required for DX. I was able to work India (Bangalore) using AO-10 on mode B and that was almost on the opposite side of the earth from LA.
73,
John KD6OZH
----- Original Message ----- From: "george abbott" ka1ajf@cox.net To: "'Bill Ress'" bill@hsmicrowave.com; G0MRF@aol.com; brobertson@mta.ca; amsat-bb@amsat.org Sent: Thursday, September 14, 2006 22:34 UTC Subject: [amsat-bb] Re: The Mode B tradition
Hi All: I always preferred mode b .I spoke with people all over the world through Ao-13. I also had 3 way contacts with stations in Japan and Germany. I live in RI.When is the Eagle set to fly?
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Bill Ress Sent: Thursday, September 14, 2006 5:39 PM To: G0MRF@aol.com; brobertson@mta.ca; amsat-bb@amsat.org Subject: [amsat-bb] Re: The Mode B tradition
Hi David,
Help me out with the 100,000 single point failures. Are you referring to the complexity of digital gates etc., in the DSP.
Isn't P3E going with a digital IF or are they using an analog backup or vice versa? That's the SDX thingy isn't it?
Regards...Bill - N6GHz
Hello Bruce / Dom.
I agree, the UV on Eagle will be apparently analog (ue) to the casual user.
But be aware Bruce that it's not "primarily" a software driven transponder.
It is in fact TOTALLY software driven. There is no linear IF, just DSP in the core. Or from another viewpoint 100,000 single point failures just waiting to happen.
73
David G0MRF _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb