Hello, Between Vic's, and Alan's answer I have what I need, thank you all!!! I can now measure bandwidth, and tell how many db down a signal is vs. it's width. Thank you gents!
Peak hold, then measure! :) -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info On Mon, 2014-04-28 at 08:37 -0700, Vic Rosenthal K2VCO wrote: > 'Bandwidth' is measured by specifying some number of dB that a signal is > down at a particular offset from the center frequency. A measurement in > Hz alone is therefore meaningless. > > I suspect that the number of dB needed to make the waterfall display of > a signal disappear depends on various things, like the gain setting. So > this is not an accurate way to measure it. > > What should work is to use the spectrum display of the P3. If you want > to know, for example, the bandwidth of a signal at 30 dB down, you just > find the points where the 'skirts' of the signal are 30 dB below the > peak. This is easy to do on the P3 which can display the signal strength > in dBm. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
