Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-09 Thread Stefan Gofferje
-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

Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-09 Thread David Bengtson
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

Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-09 Thread Stefan Gofferje
-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

[Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-09 Thread Justin Kelly
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.)

Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-08 Thread Stefan Gofferje
-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

Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-08 Thread David Bengtson
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

Re: [Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-07 Thread David Bengtson
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.

[Discuss-gnuradio] USRP custom hardware suppliers?

2011-05-04 Thread Stefan Gofferje
-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