I have been doing some reading about tdma digital voice applications such as MotoTrbo etc. I am curious if tdma voice could be used on satellites successfully Do to the time delay particularly using a heo or geo bird. Can someone more knowledgeable than I help in answering this question?
Dave Marthouse N2AAM
dmarthouse(a)gmail.com
My FCD receives as well as my IC-910.
At present I am using it mainly as a spectrum analyzer. On SO-52 you can see the whole band pass plus the beacon.
It is interesting to note the beacon level versus most of the signals in the pass band.
Also I can visually copy the CW from the beacon and other stations by watching the water fall.
I did make a few contacts from the patio using the FCD, TH-F8 and arrow.
One of these days I'll figure out how to make these posts from the BB page.
Tom K8TL
Hi Tom,
Simon Brown's (creator of Ham Radio Deluxe) excellent SDR console should work for you:-
http://www.sdr-radio.com/Software/tabid/174/language/en-US/Default.aspx
I have used this with TX/RX capabilities with a home built HF SDR receiver and an Icom 746, (eg SDR console 'mutes' when the external radio is set to TX) - you can also track the frequency of the external radio and change SDR rx freq by using the VFO dial on the radio, or from using the SDR console (clicking with mouse / using scroll wheel etc).
The FunCube dongle works very well with the SDR console, it also has built in satellite support, so you can store downlink frequencies for each satellite, and it will also control rotators and calculate doppler shift (does a clever thing with the doppler shift by moving the AF from the IQ stream, rather than changing the LO on the dongle (each time the LO changes there is a gap before it locks again).
You would have to build some sort of sequencer for taking the FCD out of the loop when going into TX, but these are widely available.
I have a Kenwood TS-2000 that I use to play with the birds, I haven't yet tried this in conjuction with the SDR console, I imagine it would would (in satellite mode) so you can have U/V or V/U capabilities - this is something I should have a play with in the near future.
Best regards
Matty
MD0MAN
>
>
> ------------------------------
>
> Message: 7
> Date: Mon, 27 Aug 2012 13:44:32 -0500
> From: Thomas Doyle <tomdoyle1948(a)gmail.com>
> To: AMSAT-BB(a)amsat.org
> Subject: [amsat-bb] FUNcube + SatPC32 + SDR-Radio
> Message-ID:
> <CAHnRQRJTqfD8AZ6=swwNh2+m0zM6SaSVkTusqRsf12wE+p+kTA(a)mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> The FUNcube and SDR-Radio work great together. Transmit control for
> satellite use in SDR-Radio is very limited (non-existent from what I
> have been able to find).
> I would like the FUNcube / SDR-Radio combination to act like a simple
> receiver under cat control from SatPC32 or similar program. I would
> like to talk with anyone who has actual experience with this.
>
>
> tnx & 73 W9KE
>
>
> ------------------------------
>
> _______________________________________________
> Sent via amsat-bb(a)amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> http://amsat.org/mailman/listinfo/amsat-bb
>
>
> End of AMSAT-BB Digest, Vol 7, Issue 272
> ****************************************
Hi,
I'm forwarding this note for encouraging input and generating wider
interest.
Samudra N3RDX
George Washington University
samudra(a)gwu.edu
---------- Forwarded message ----------
From: Jeremy Straub <jastraub(a)gmail.com>
Date: Sun, Aug 26, 2012 at 12:00 PM
Subject: [CubeSat] NASA RFI for CubeSat Launch Requirements
To: cubesat(a)cubesat.org
Cc: larry.p.cooper(a)nasa.gov
Hi All,
NASA is currently soliciting input regarding the launch services needs of
the CubeSat/small satellite community. This was discussed briefly at a
presentation at the end of the Small Sat Conference. As I had not seen
anything about this go out to this mailing list, I wanted to make sure that
everyone that might be interested had an opportunity to respond. Given the
stated topic of the presentation and the fact that it occurred as the
conference was wrapping up (after lunch on the last day), many of those
that might have otherwise been interested were not in attendance.
The RFI (which is located at the URL below), Dr. Larry Cooper (Program
Executive for Centennial Challenges) mentioned, will be utilized to shape
future competitions aimed at creating lower-cost, higher-frequency CubeSat
launch opportunities (including, possibly, propulsion-system-friendly
ones). Given this, it seems that maximizing community input (to ensure a
proper balance with launch service provider/vendor needs/etc.) is highly
desirable.
http://prod.nais.nasa.gov/cgi-bin/eps/sol.cgi?acqid=153002#Other%2001
Thanks,
Jeremy Straub
Ph.D. Student
University of North Dakota
_______________________________________________
CubeSat mailing list
CubeSat(a)cubesat.org
http://lists.cubesat.org/mailman/listinfo/cubesat
TAPR Announces DCC (Digital Communication Conference)
Technical & Introductory Sessions Schedule,
Banquet Speaker/Topic and
Sunday Seminar Speaker/Topic
ARRL/TAPR DCC, Atlanta, September 21 - 23
www.tapr.org/dcc
Sheraton Gateway Hotel Atlanta Airport
1900 Sullivan Road
Atlanta, GA 30337
Technical / Introductory Sessions Schedule
http://www.tapr.org/pdf/DCC_2012_Schedule.pdf
Technical Sessions
Friday - Saturday
Introductory Sessions
Saturday
Saturday Night Banquet Speaker & Topic
http://www.tapr.org/dcc#banquet
DCC Saturday Night Banquet Speaker
will be Bdale Garbee, KB0G
talking about the "Sharing the Joy of Making"
Sunday Morning Seminar Speaker & Topic
http://www.tapr.org/dcc#seminar
DCC Sunday Morning Seminar will be a hands-on tutorial
using Gnuradio to design and implement software defined radios on your laptop
presented by Tom Rondeau, KB3UKZ, the leader of the Gnuradio project.
For anyone that didn't see the live webcast there is a video of the OSSI-1 keynote presentation given in Malmö, Sweden at
http://www.uk.amsat.org/?p=9921
73 Trevor M5AKA
One of the real pioneers has passed:
http://preview.tinyurl.com/9e722fo
Alan
-----------------------------------
Climate is what you expect,
weather is what you get.
Robert A. Heinlein