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x-Axis vs peak-blobs vs rx-meter
Posted: Thu Jul 22, 2021 8:23 am
by oe3ide
Hi,
maybe it is a silly question, but which values are represented on the x-axis and the peak-blobs. It seems to be not related to the rx-meter.
See yellow marked areas in the screenshot (right click => open picture in new tab for full-image)
Thanks & 73 Ernst
Re: x-Axis vs peak-blobs vs rx-meter
Posted: Thu Jul 22, 2021 11:39 am
by I4LEC
Hi Ernst,
it is refered to the bin bandwidth, which given the 26dB difference, should be set at 7.4Hz
10 log (2960/7.4) = 26
73, Clay
Re: x-Axis vs peak-blobs vs rx-meter
Posted: Thu Jul 22, 2021 11:41 am
by NC3Z
Re: x-Axis vs peak-blobs vs rx-meter
Posted: Thu Jul 22, 2021 1:45 pm
by oe3ide
Thanks for the explanation !
73 Ernst
Re: x-Axis vs peak-blobs vs rx-meter
Posted: Thu Jul 22, 2021 2:05 pm
by NC3Z
Just as an aside, since I reset my database and built it by hand again with the fast and furious pace of Ritchie's updates, I like to calibrate my S-Meter using the built in Cal tools. I use a Rohde & Schwarz sig gen and found that the stock S-meter and Spectrum call was off by .6 dB @ -73dB. Pretty damn good for no cal, but I still calibrated to be nuts on
Freq cal was off tad also, but WWV is always handy.