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Hello - just as a disclosure of interest thing, do you produce this SDR-IQ radio? :-) because your information sounds a lot like a commercial :-) Anyway, it seems like a good radio at a good price. Does it work on Linux, though? Is it recognized on USB as a sound card or does it need special drivers? I always have had hardware radios, because I like to have everything portable, but I thought I might try one day a SDR. I never bought one because I also wondered about one thing: doesn't the computer interfere with the signal? Monitors and laptops sometimes generate electrical noise on hardware radios, doesn't it happen on SDRs, which are plugged directly into computers and kept near them? Thanks & 73s Flavio SP9F On 09/08/14 15:06, WD8ARZ wrote: > Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from > this list > > Hello Kurt, this is Bill WD8ARZ. > > Understandable questions, and I can answer them as they apply to the > SDR-IQ. It has had several firmware updates since it originally came out. > http://www.rfspace.com/RFSPACE/SDR-IQ.html > > A variety of software will operate the SDR-IQ. A program called > SpectraVue is provided free and a wonderful program. > http://www.rfspace.com/RFSPACE/SVDownload.html > > * For those playing with the modern SDR's, do they have selectable > bandwidth? > Answer: Yes, most SDR's allow for variable bandwidth setting for all > modes. > Many allow for setting lower and upper frequency points for the > bandwidth. > > * What about looking at a wideband signal, if you set an SDR to 30 or 40 > KHz, would you see and hear that whole swath? > Answer: Yes, most SDR receivers give you configuration options for the > display and audio / mode separately. At some point in the bandwidth > setting, > audio is not provided as it will be limited to the bandwidth of the > selected mode > to listen in. > > Specifically to the SDR-IQ > ===================== > Maximum display bandwidth of 196 KHz at an incredible 0.75 HZ RBW. > Records and plays back spectrum segments up to 196 KHz wide with full > demodulation and tuning capabilities. > Amazing Frequency coverage of 500Hz to 30 MHz. Usable down to 100 Hz. > > Note: That is not an error. 500Hz and 100Hz is correct, it is NOT kilo > hertz. > > Directly interfaces with Icom, Kenwood, Elecraft and Yaesu radios for > use as a tracking panoramic adapter. Built in serial RS-232 port. This > port can be used to communicate with external radios. Supports AM, FM, > NFM, WFM, LSB, USB, CW, CWR, DSB, DRM and customs demod filters / offsets. > > There are many many other features, but it is probably best you explore > those on your own. Download the manual at: > http://www.rfspace.com/RFSPACE/Support.html > > One of the key features I just love that took years for other SDR models > to pick up on, is the ability to record rf spectrum to a hard drive > file. When you play that recorded spectrum file back it is NOT audio, it > is just like exploring that spectrum when you are in real time tuning > true RF, except it is a recorded file. For example. Record one hour of > 196 KHz bandwidth for the AM broadcast band. Those stations are 10 KHz > apart. You can listen to each of those stations in turn for that one > hour duration. It will take you twenty hours to listen to it all in real > time playback. That includes the spectrum display. All is just as > configurable from the recorded file as when in real time live mode. > Change the mode, bandwidth, display rate, etc etc. > > Have an elusive digital mode that your having a hard time trying to > decode? Record the bandwidth for that signal on the frequency of > interest, or wider if wanted. Play back that file later and tune around > for that signal. When you find it, back up the recording the beginning > of that signal and start playing with the bandwidth and mode settings > for the best possible copy. Then using any external software for digital > modes, find the type and settings needed to decode it. Play that signal > over an over again while testing different digital software modes and > configurations until you have cracked it. > > Of course you can do the same for AM, FM, SSB etc modes. Have a weak > signal next to a strong one and your just not making out the ID the > speaker says? Play with the Bandwidth, Mode, RF Gain, I.F. Gain etc and > keep playing that section and I bet you get the I.D. of that station. > > I could go on and on. Your tougher task is to sort out all those > different models and features to get the bang for the buck you want. > Suspect you wont be disappoint in starting with the SDR-IQ for learning > / testing, and end up keeping it even when you try some other SDR down > the road. You dont see an SDR-IQ on sale a lot, and most of the time > that is due to lack of it being used by the owner. > > Good luck Kurt, and please keep us informed of your progress. > > 73 from Bill - WD8ARZ > South Bend, Indiana > > On 8/9/2014 3:27 AM, KD7JYK DM09 wrote: >> For those playing with the modern SDR's, do they have selectable >> bandwidth? >> Everything I am familiar with has things alongs the line of 2 KHz or >> so for >> AM, 1.4 for SSB, various CW bandwidths, 100-200 KHz for FMBC, 15 KHz >> for FM >> on 10m and so forth. Seems with a lot of the new modulation schemes, >> something where you can manually adjust the filter by the Hz would be >> nice >> for cutting out noise. What about looking at a wideband signal, if >> you set >> an SDR to 30 or 40 KHz, would you see and hear that whole swath? >> >> Kurt > ______________________________________________________________ > Spooks mailing list > Home: http://mailman.qth.net/mailman/listinfo/spooks > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Spooks@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Spooks@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
