[Discuss-gnuradio] USRP custom hardware suppliers?
I spotted this discussion midway. Here are a few thought on the matter from an Amateur Radio operator perspective. Depending on the frequencies in question you can use several COTS amplifiers for specific bands needed, and use a Diplexer/Triplex/Quad... (basically filters to separate the bands.) at the inputs, and outputs on the amps needed for your application. a few COTS examples I found with Google, http://www.hamradio.com/detail.cfm?pid=H0-004781, http://www.hamradio.com/detail.cfm?pid=H0-007877 I have no connection with HRO other then being happy with the stuff I bought from them in the past. Please let me know if the suggestion was of use. Justin N2TOH ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 05/09/2011 01:55 PM, David Bengtson wrote: > So things like the PRC-148 aren't really commercially available. > That's a military handheld for sale to governments. AFAIK, there is a commercial version which lacks the military software features like HAVEQUICK, SINGCARS, etc. > http://www.ficora.fi/attachments/englantiav/1156489106620/FICORA022001M.pdf > > Seems to claim that transmitters need to be inspected before they can > be used. That's probably where they will get you. SDR has moved faster > than most regulatory agencies have moved. See section 2. That document applies to transmitters for TV, radio, fixed satellite earth and fixed radar stations as well as transmitters which are used in R&D under an R&D license. Means, if you apply for a broadcasting license and buy a TX, the whole installation has to be inspected to make sure you don't fry the chickens on the neighbors' farm :). - -- (o_ Stefan Gofferje| SCLT, MCP, CCSA //\ Reg'd Linux User #247167 | VCP #2263 V_/_ Heckler & Koch - the original point and click interface -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAk3Hy78ACgkQbQKZlCdPOMPXYgCgu+Q+WZyCsBG3rtXWdzYtPYk4 Dt0Anib5eVf8tVJRMbIWjiKXbAS63P8X =mwSk -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
So things like the PRC-148 aren't really commercially available. That's a military handheld for sale to governments. I don't think that Military radios need to meet some of the same requirements as commercially available radios. Not having taken a PRC-148 apart, I'm not sure what the innards look like, but I bet there's switched in filters to address harmonics and spurious. http://www.ficora.fi/attachments/englantiav/1156489106620/FICORA022001M.pdf Seems to claim that transmitters need to be inspected before they can be used. That's probably where they will get you. SDR has moved faster than most regulatory agencies have moved. Dave On Mon, May 9, 2011 at 5:45 AM, Stefan Gofferje wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > On 05/09/2011 04:54 AM, David Bengtson wrote: >> The other issue is the various >> regulatory bodies are going to frown on something like that if you try >> to sell it. > > Fortunately, in Finland we don't have too many problems with that. Sale > and possession is not regulated. Only operation is. > >> You can't really avoid multiple filters to keep harmonics and spurious >> in check. Lot's of switched paths are the way to go. > > Again, let me emphasize that I'm rather new to the SDR topic. Does that > mean that commercial wide-bandwidth SDR-based radios like the PRC-148 > have a a bunch of filters and different paths with are switched > electronically inside or do they just throw out a lot of harmonics and > spurious? > > - -- > (o_ Stefan Gofferje | SCLT, MCP, CCSA > //\ Reg'd Linux User #247167 | VCP #2263 > V_/_ Heckler & Koch - the original point and click interface > -BEGIN PGP SIGNATURE- > Version: GnuPG v2.0.16 (GNU/Linux) > > iEYEARECAAYFAk3Ht80ACgkQbQKZlCdPOMP6dwCeLfdDXAHEMqUxZth+f0edsyQA > eHIAn0CoiXqtFOOfvW+QPIjPS8hG/Ntj > =SS5N > -END PGP SIGNATURE- > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 05/09/2011 04:54 AM, David Bengtson wrote: > The other issue is the various > regulatory bodies are going to frown on something like that if you try > to sell it. Fortunately, in Finland we don't have too many problems with that. Sale and possession is not regulated. Only operation is. > You can't really avoid multiple filters to keep harmonics and spurious > in check. Lot's of switched paths are the way to go. Again, let me emphasize that I'm rather new to the SDR topic. Does that mean that commercial wide-bandwidth SDR-based radios like the PRC-148 have a a bunch of filters and different paths with are switched electronically inside or do they just throw out a lot of harmonics and spurious? - -- (o_ Stefan Gofferje| SCLT, MCP, CCSA //\ Reg'd Linux User #247167 | VCP #2263 V_/_ Heckler & Koch - the original point and click interface -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAk3Ht80ACgkQbQKZlCdPOMP6dwCeLfdDXAHEMqUxZth+f0edsyQA eHIAn0CoiXqtFOOfvW+QPIjPS8hG/Ntj =SS5N -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
You're going to need several stages of amplification to get to 5+ watts out. It can all be done on a single board, but making it work requires a fair amount of experience. The other issue is the various regulatory bodies are going to frown on something like that if you try to sell it. You can't really avoid multiple filters to keep harmonics and spurious in check. Lot's of switched paths are the way to go. Dave On Sun, May 8, 2011 at 6:02 AM, Stefan Gofferje wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > On 05/07/2011 05:28 PM, David Bengtson wrote: >> That's a pretty aggressive goal, to hit 5W over the USRP BW. To get >> reasonable linearity, you're probably looking at something that draws >> 25W of DC power. An external Amp is probably off the shelf. For >> example, Minicircuits has a TIA-1000 that does 4+ watts out from 100 >> to 1000 MHz for $2000. You're probably going to need post PA filtering >> to eliminate harmonics and spurious as well. > > Yeah, Marcus pointed me to the Minicircuits site. Pretty impressive > stuff. Here in Europe, you mainly get the usualy band-limited amps off > the shelf, like HF, 2m, 70cm, etc. > I'm pretty new to the whole SDR-stuff and not totally familiar with > everything yet. I had the chance to look into a commercial SDR some time > ago which was making 5W from 30 to 512MHz and at least I couldn't figure > out any amp module in there, so I assumed, the 5W came directly from the > SDR core - which Marcus told me is highly unlikely. > I'm still wondering about how to realize a system with a high bandwidth > (basically like the WBX but actually, we only need to go up to about > 950MHz) without the need for several amps and/or filters while still > keeping the harmonics and spurious in check. > The main goal is ease of operation, i.e. the operator shouldn't need to > think about switching cables/hitting RF switches depending on the RF band. > > - -- > (o_ Stefan Gofferje | SCLT, MCP, CCSA > //\ Reg'd Linux User #247167 | VCP #2263 > V_/_ Heckler & Koch - the original point and click interface > -BEGIN PGP SIGNATURE- > Version: GnuPG v2.0.16 (GNU/Linux) > > iEYEARECAAYFAk3GaiYACgkQbQKZlCdPOMPEDQCgnA43yE0ZBLnk1A2SHBweZ9LL > 9WQAoMYMlxU730PldA2gTyBdBnOCYUEw > =dkPv > -END PGP SIGNATURE- > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 05/07/2011 05:28 PM, David Bengtson wrote: > That's a pretty aggressive goal, to hit 5W over the USRP BW. To get > reasonable linearity, you're probably looking at something that draws > 25W of DC power. An external Amp is probably off the shelf. For > example, Minicircuits has a TIA-1000 that does 4+ watts out from 100 > to 1000 MHz for $2000. You're probably going to need post PA filtering > to eliminate harmonics and spurious as well. Yeah, Marcus pointed me to the Minicircuits site. Pretty impressive stuff. Here in Europe, you mainly get the usualy band-limited amps off the shelf, like HF, 2m, 70cm, etc. I'm pretty new to the whole SDR-stuff and not totally familiar with everything yet. I had the chance to look into a commercial SDR some time ago which was making 5W from 30 to 512MHz and at least I couldn't figure out any amp module in there, so I assumed, the 5W came directly from the SDR core - which Marcus told me is highly unlikely. I'm still wondering about how to realize a system with a high bandwidth (basically like the WBX but actually, we only need to go up to about 950MHz) without the need for several amps and/or filters while still keeping the harmonics and spurious in check. The main goal is ease of operation, i.e. the operator shouldn't need to think about switching cables/hitting RF switches depending on the RF band. - -- (o_ Stefan Gofferje| SCLT, MCP, CCSA //\ Reg'd Linux User #247167 | VCP #2263 V_/_ Heckler & Koch - the original point and click interface -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAk3GaiYACgkQbQKZlCdPOMPEDQCgnA43yE0ZBLnk1A2SHBweZ9LL 9WQAoMYMlxU730PldA2gTyBdBnOCYUEw =dkPv -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP custom hardware suppliers?
That's a pretty aggressive goal, to hit 5W over the USRP BW. To get reasonable linearity, you're probably looking at something that draws 25W of DC power. An external Amp is probably off the shelf. For example, Minicircuits has a TIA-1000 that does 4+ watts out from 100 to 1000 MHz for $2000. You're probably going to need post PA filtering to eliminate harmonics and spurious as well. Dave On Wed, May 4, 2011 at 8:00 AM, Stefan Gofferje wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi, > > are there any manufacturers besides Ettus that offer boards for the USRP > or offer custom boards? I would especially be interested in something > WBX-y with 5+ or even 25+W ERP. > Using an external amplifier does not exactly make sense on a 2.15GHz > bandwidth unless of course, somebody meanwhile is actually building > amplifiers which work over this bandwidth without producing distortions > and harmonics of significant strength. > > - -- > (o_ Stefan Gofferje | SCLT, MCP, CCSA > //\ Reg'd Linux User #247167 | VCP #2263 > V_/_ Heckler & Koch - the original point and click interface > -BEGIN PGP SIGNATURE- > Version: GnuPG v2.0.16 (GNU/Linux) > > iEYEARECAAYFAk3BP/oACgkQbQKZlCdPOMMl9gCfaiV3+ZXCHBnN9yA8CqBuw3rF > fk4Anjc/AfVQ8bFgDjGlOtLucIVgUvIX > =C9ro > -END PGP SIGNATURE- > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] USRP custom hardware suppliers?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, are there any manufacturers besides Ettus that offer boards for the USRP or offer custom boards? I would especially be interested in something WBX-y with 5+ or even 25+W ERP. Using an external amplifier does not exactly make sense on a 2.15GHz bandwidth unless of course, somebody meanwhile is actually building amplifiers which work over this bandwidth without producing distortions and harmonics of significant strength. - -- (o_ Stefan Gofferje| SCLT, MCP, CCSA //\ Reg'd Linux User #247167 | VCP #2263 V_/_ Heckler & Koch - the original point and click interface -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAk3BP/oACgkQbQKZlCdPOMMl9gCfaiV3+ZXCHBnN9yA8CqBuw3rF fk4Anjc/AfVQ8bFgDjGlOtLucIVgUvIX =C9ro -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
