[amsat-bb] Re: XW-1 QSO and packet attempt

[Colin Hurst]

Luc,
Please look at Mike DK3WN's post to the -bb on 19th December.
The FM and the AFSK Digital are operational at the "same" time.
If you no longer have that mail please listen to the audio at
http://www.dk3wn.info/p/?p=10091
Best regards,
Colin VK5HI.


> -----Original Message-----
> From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org]On
> Behalf Of Luc Leblanc
> Sent: Monday, 21 December 2009 15:25
> To: amsat-bb at amsat.org
> Cc: eu-amsat at yahoogroups.com
> Subject: [amsat-bb] Re: XW-1 QSO and packet attempt
>
>
> On 20 Dec 2009 at 22:05, Sebastian wrote:
>
> Date sent:      	Sun, 20 Dec 2009 22:05:48 -0500
> From:           	Sebastian <w4as at bellsouth.net>
> Subject:        	[amsat-bb] Re: XW-1 QSO and packet attempt
> To:             	AMSAT BB <AMSAT-BB at amsat.org>
>
> > Luc (VE2DWE) has some magic in his antennas, as I consistently
> heard him pretty much all through the pass.
> >
>
> John K8YSE wrote:  It could have been that the BBS stops the voice
> repeater but there were times that VE2DWE was making it (although
> noisy) and my signal was not there at all.  Maybe the amount of
> deviation on the tone makes a difference when there are a lot of
> competing signals on the input.
>
> As the bird sank low on the horizon on the way north, it was again
> possible to get into it.  Normally there are not many who get
> into any satellite that is in northern Canada.  Less congestion on
> the input gives you a better chance.
>
>
>
> > I heard Drew mention that perhaps due to the PL tone and the
> large number of stations trying to use the repeater, very few
> stations were able to make a QSO.
> >
> >
>
> Three problems: as with AO-51 the CTCSS tone is blocking a lot
> of station it was the same when ISS cross band repeater was on
> too. When XW-
> 1 was over central USA his footprint was covering nearly all the
> Northern continent including central america and the Carribean
> island with
> all the Northern satellite station in the same footprint it
> should be a challenge at the satellite receiver to have one
> station able to
> make it through that's the second one and for the third one the
> packet BBS also is competing at the receiver and i'm guessing at the
> transceiver too as i never heard the packet transmission over a
> phone transmission. Without any knowledge of the ways the transmitter is
> voting or who's got the priority first it is hard to tell if
> this packet turn over is not also a contributing factor as many of my
> transmissions where shut down to just get a packet burst afterwards?
>
> I missed the linear transponder but i'm guessing it will be "The
> mode" on XW-1 as per what i heard from the recordings.
>
> It is a great sat and as i wrote a nice christmas gift with
> SO-67 as a suggestion the FM/BBS mode can be put in service in
> light traffic
> pass as it is permitting less traffic than the linear
> transponder, but it can be an alternance of both. Let see what
> the european pass will
> give as the whole europe will be in the same footprint!!!.
>
> For the magic in my antennas there is none that i know but
> operating in full duplex is a big help as you can choose when to
> key the TX but
> as we cannot get a constant TX from the satellite we probably
> often transmit over each other Letting the receiver only
> activated by the
> carrier will at least make us hear through the capture effect
> and it will tell us when it's time to TX? It will not solved the
> tailgating
> problem but it will help.
>
> P.S. There is also a trick on XW-1 as there was one on SO-67 i
> will have to check it again but he's not much nicer than the one
> i discover
> on SO-67 fighting against the 3 seconds timer... Just remember i
> wrote "fighting"!
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> DSTAR urcall VE2DWE
> WAC BASIC CW PHONE SATELLITE
>
>
> _______________________________________________
> Sent via AMSAT-BB at 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