I wonder if someone would check my understanding of interpreting broadband noise on the P-3 display.
I have gone through the P-3 calibration procedure on 40M as well as calibrating my S-Meter on the same band. Now when looking at band noise I see the tops of the yellow line at around the -110 dBm level. If I run peak-hold, the peaks are maybe -108 dBm in the region where the K3 is tuned (between the MKR A cursor). Without further interpretation this would indicate S-3 or so. The K3 S-Meter shows S-6 to S-7, hmmm. Should I be adding 10+log(K3 bandwidth/P3 resolution) to my P-3 view to compare with K-3 S-Meter? +/- 10 KHz span: P3 resolution = 20,000/450 = 44.4 Hz K3 bandwidth = 2700 Hz (stock filter) 10*log(2700/44.4) = 17.8 dB -110 dBm +17.8 dB = -92 dBm or around S-6. AE6WA Mike Scott Tarzana, CA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
