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Linux Software-Defined Radio Question?   Message List  
Reply Message #3190 of 5877 |
Re: [Homebrew Transistor Radios] Linux Software-Defined Radio Question?

On Thursday 13 April 2006 11:47 pm, Steven Coles wrote:
> http://www.qsl.net/wm2u/psk31.html
>
> has links to PSK software for Windows, Macintosh, and Linux.

Ok, but very much ham-oriented...

> glfer is a QRSS (slow radiotelegraph) transmission and reception
> program. Such programs allow examining small spectrum segments.
> For instance you can estimate BCB DX conditions by viewing how many
> carriers pile up on an AM frequency.
>
> http://www.qsl.net/in3otd/glfer.html

Maybe worth a look later on, though my initial look at the page didn't seem
to say much about the spectral analysis capabilities or maybe I didn't look
close enough, or something...

This:

> And a soundcard oscilloscope
>
> http://linux.softpedia.com/get/Science-and-
> Engineering/Visualization/QOscC-2384.shtml

Seemed to indicate that it was for folks who couldn't afford a regular scope.
I have a couple of them, so I didn't give it a whole lot of attention. Only
problem I have is no bench in here to set it up. :-) The uncluttering
proceeds, anyhow...

And this:

> Baudline is a spectrum analyzer which runs under Linux. It has some
> extra functions. Go to the page bottom for system requirements.
>
> http://www.baudline.com/what_is_baudline.html

...is seriously awesome! Not only is it something where a LOT of thought
seems to have gone into the design of the program and the features that are
included, but the web pages do one heck of a good job illustrating just what
the heck all that puppy can DO! I've downloaded it, and the manual pages,
and will see if I can manage to make it do some tricks. I think I'm going to
have to build some kind of a patch bay for my sound card inputs and outputs
and such, though... :-)

I've passed that URL around to several places, mailing lists and folks that I
thought might find it to be of interest.

BTW, has any of the stuff I've sent your way arrived yet?

--
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ablest -- form of life in this section of space, a critter that can
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M Dakin




Fri Apr 14, 2006 9:59 pm

rtellason
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Message #3190 of 5877 |
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Roy & Linux Users, This is drifting well off the usual HBTR themes. Googling "Linux software defined radio" brings up lots of hits. Many offer alpha, beta, or...
Steven Coles
steven_coles Offline Send Email
Apr 12, 2006
5:01 am

... I've no idea really. The last time I looked at some of this stuff it relied on hardware (a radio card of some sort?) that I didn't have and didn't expect ...
Roy J. Tellason
rtellason Offline Send Email
Apr 12, 2006
6:46 pm

... The last time I looked at some of this, it was being done with a radio front end and a sound card. The idea is that the front end converts the desired...
Dave
wa4qal Offline Send Email
Apr 12, 2006
10:02 pm

... And some contain filters that can be either tweaked or removed. ... That sounds pretty nifty...! ... I suspect that most of what I'm running here wouldn't...
Roy J. Tellason
rtellason Offline Send Email
Apr 13, 2006
7:05 pm

... The ultimate requirement is the sampling rate, since that determines the Nyquist limit. The sampling rate has to be at least twice the highest frequency...
Dave
wa4qal Offline Send Email
Apr 13, 2006
7:36 pm

... That sounds pretty typical to me. But that's also in stereo... ... I haven't really looked at what's involved in tweaking this sort of hardware at all,...
Roy J. Tellason
rtellason Offline Send Email
Apr 13, 2006
8:01 pm

... So you might be able to listen to two adjacent channels at once? :-) Sounds reasonable. After all, most of us have two ears. ... I'm not what you'd call...
Dave
wa4qal Offline Send Email
Apr 13, 2006
8:37 pm

... Why not... Actually I was thinking that if it's possible to sample at 44KHz in stereo, it might be possible to go higher if you were only using one channel...
Roy J. Tellason
rtellason Offline Send Email
Apr 13, 2006
9:38 pm

Roy, ... <snip> ... with me ... painfully low. In ... original XT ... so per run. ... integer ... another ... Yes. In the early microcomputer days some...
Steven Coles
steven_coles Offline Send Email
Apr 14, 2006
4:49 am

... Just so. And while a lot of that stuff isn't exactly common these days it hasn't been entirely forgotten, either. :-) ... Ok. ... I thought so but was...
Roy J. Tellason
rtellason Offline Send Email
Apr 14, 2006
10:20 pm

... <big snip> ... Roy, Another thing I like about software oscilloscopes, signal generators, speaker analyzers, spectrum analyzers, and AC voltmeters: No...
Steven Coles
steven_coles Offline Send Email
Apr 14, 2006
10:36 pm

... True. I'm glad to have my scopes, but I can also see the utility of some of those other approaches to things as well, particularly if you can do things ...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
12:52 am

Roy, Ubantu Linux has reached the point of asking me to set a password. Now it's installing `grub.' Oops! It seems to have just un-mounted North America. . ....
Steven Coles
steven_coles Offline Send Email
Apr 15, 2006
5:07 am

... I read that and the thought came to me that perhaps I could do something with what appears to be a ceramic filter (?) that I just salvaged, marked 455... ...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
4:31 pm

... That should make for a really good, narrow IF filter. Or, a really stable BFO. Although probably not both. ... I'm not sure you're going to be able to...
Dave
wa4qal Offline Send Email
Apr 15, 2006
6:26 pm

... Hm, what's funny is that for a good long while I was used to those abbreviations ("AF", "RF", and "IF") when used in the context of older tech, and it...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
6:51 pm

Roy, ... <snip> ... with ... marked 455... ... Ceramic filters should work as frequency control elements in oscillators. I've used ceramic singing greeting...
Steven Coles
steven_coles Offline Send Email
Apr 15, 2006
6:30 pm

On Saturday 15 April 2006 02:27 pm, Steven Coles wrote: <snip> ... I haven't run across any of those yet, but have an assortment of "buzzers" (typically...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
6:57 pm

Roy, ... <snip> ... resonances ... modems or to ... interesting to see ... be. Most ceramic audio transducers I've played with have resonances between 1.5 and...
Steven Coles
steven_coles Offline Send Email
Apr 16, 2006
1:51 pm

On Sunday 16 April 2006 09:50 am, Steven Coles wrote: <snip> ... Not any of the ones I have on hand here, as far as I can recall. ... Seems to me that...
Roy J. Tellason
rtellason Offline Send Email
Apr 16, 2006
6:05 pm

Roy, ... <rtellason@...> wrote: <snip> ... frequency I ... Roy, I put a slightly cleaned up version of my BFO schematic in the Accessories for Receivers photo...
Steven Coles
steven_coles Offline Send Email
Apr 16, 2006
6:21 pm

On Sunday 16 April 2006 02:21 pm, Steven Coles wrote: <snip> ... Well, that one I got seems to be eminently usable for all sorts of stuff... I'm going to have...
Roy J. Tellason
rtellason Offline Send Email
Apr 16, 2006
6:38 pm

... <snip> ... 200, which ... and plan to ... another ... to replace ... of the AT ... from being ... therefore ... other MBs I ... along with my ... and try...
Steven Coles
steven_coles Offline Send Email
Apr 14, 2006
3:49 am

... Ok, but very much ham-oriented... ... Maybe worth a look later on, though my initial look at the page didn't seem to say much about the spectral analysis...
Roy J. Tellason
rtellason Offline Send Email
Apr 14, 2006
10:02 pm

Roy, ... regular scope. ... attention. Only ... uncluttering ... Perhaps. It's for AF only of course. But when I use an oscilloscope that presents in...
Steven Coles
steven_coles Offline Send Email
Apr 14, 2006
10:22 pm

... And then I look at the price tag for the new scopes, and quickly realize how I can do without them. ;-) Seriously, though, I'm real happy with my...
Dave
wa4qal Offline Send Email
Apr 14, 2006
10:37 pm

... I haven't looked at that sort of stuff in years now. Not since I got the tek I have now... I hear there are lots of good deals out there in used ones,...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
12:59 am

... True. Though I very seldom print anything at all out these days, I used to get all sorts of stuff put on to paper and I "got over it" back when I still ...
Roy J. Tellason
rtellason Offline Send Email
Apr 15, 2006
12:31 am
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