Yes, there is people who have what in the past was expensive test equipment and now can be bought by 1/10 of the original price. The problem is that you need someone who can record 2 seconds of a signal that is slightly beyond the actual sound card sampling capability. A signal that you can have by simply tuning your radio and hooking directly to the FM discriminator output. This signal is available virtually all over the world. AFAIK there was in the past no expensive test equipment that can sample and record a file. Now there are: the R&S SMBV100 can sample and play any signal upto 3GHz with the full options fitted and the companion recorder/player for 200K euros, the file produced are not PC compatible, of course.
On Thu, Mar 15, 2012 at 8:31 PM, Chris Albertson <albertson.ch...@gmail.com>wrote: > On Thu, Mar 15, 2012 at 3:56 AM, Azelio Boriani > <azelio.bori...@screen.it> wrote: > > Are you sure that a .WAV file can support the full MPX stereo and RDS > > signal? I suspect that you need raw samples that a sound card can't > handle. > > Some audio interfaces have a low pass filter to cut off at about 20KHz > but many don't have the filter. The user manual should list the > bandwidth of the interface. Mine claims to be flat out to 40KHz. But > it varies. > > For example the EMU 2020 user manual reads > "Frequency Response (min gain, 20Hz-20kHz): +0.0/-0.07dB" > But what happens after 20KHz? The specs don't say. You have to test > it yourself and see. > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
