I think your inclination is correct. People would always be tempted to make measurements/comparisons of signals above 70Mhz and the rolloff could easily make them bogus. Including the rolloff region would just create confusion.
On Sat, 2012-08-18 at 21:33 -0500, Stephen Hicks, N5AC wrote: > George, > > Yes this certainly can be done. We have a couple of options to show the > "entire spectrum." One would be to show 0-61MHz and the bin size -- the > amount of spectrum in each horizontal pixel -- is just under 30kHz. The > other option would be to view 0-122MHz with a bin size of 60kHz. In this > case, everything above 70MHz would be significantly rolled off because of > our 70MHz LPF. So 70-122MHz would not have much useful data although you > could probably see very strong stations such as FM broadcast stations. My > inclination is to do 0-61MHz, but I would be interested if there are other > opinions about this. They both cost us about the same in terms of FPGA > fabric. > > > Steve > > Stephen Hicks, N5AC, AAR6AM > VP Engineering > FlexRadio Systems™ > 4616 W Howard Ln Ste 1-150 > Austin, TX 78728 > Phone: 512-535-4713 x205 > Email: > [email protected]<https://mail.google.com/mail/mu/mp/732/?source=na&ver=1.3&hr=1&hl=en> > Web: www.flexradio.com > > > > *Tune In Excitement™* > PowerSDR™ is a trademark of FlexRadio Systems > > > On Saturday, August 18, 2012, George Allen wrote: > > > Since the SCU digitizes an astounding amount of the radio spectrum in > > real-time, can the entire spectrum be displayed, in a single display, to > > provide a spectrum analyzer capability? > > > > This would be pretty handy when trying to analyze the output of a > > home-brew rig. > > > > George > > K2CM > > > > > > > > _______________________________________________ > > Flexedge mailing list > > [email protected] > > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > > used for posting topics related to SDR software development and > > experimentalist who are using beta versions of the software. > > > > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
