Hi Roger, Guess the burst originates from a periodic signal (maybe something rich in harmonics), and one of the harmonics is closer to one of the frequency ranges than the other. Or.. the two bands a
73 Eddie G3ZJO On 07/04/2011 17:09, Roger Lapthorn wrote: Help... After lunch today my wife turned on the washing machine and the tumble drier and for two periods there was a burst of interference v
Yes, but they disappear between 8970.03 Hz and 9876.57 Hz - that's a very small band for anything to knock them out. It's 0.00105 of an octave. If something is acting like a low-pass filter, at 6dB/o
Roger let me know when you have observed the 2 lines after 1400 and I will show you the spectrum at the same time around 8.976kHz which is virtually clear. Grabber is not updating the DFCW600 window
OK Roger Yep it surprises when you see it. I will start the 600 widow grabbing again now, Just a bit higher and we see how clean it is. There is nothing better than a tractical demifasion. :-) Marcus
Help... After lunch today my wife turned on the washing machine and the tumble drier and for two periods there was a burst of interference visible on the lower split screen as vertical noise stripes.
Hi Roger I don't fit your category, (understanding SL) however I often see this, noise from the mains I suspect, huge dirty sine waves. Considering they originate from a 50Hz source they are stronges
Hancock's words, 5Hz that's very nearly a screenfull. I have pulled my 600 screen down so you can see the strong lines which filled the screen around 1400 today petering out at 8.971kHh 'ish. When t
Dear Roger, LF Group, These vertical stripes are indeed due to harmonics of the mains frequency, specifically the 179th harmonic at nominally 8950Hz. If you watch these harmonics with, say, "QRSS3" s
Cheers, Jim Moritz 73 de M0BMU -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/
Hi Chris Coincidentally, yesterday I watched the peaks of dirty sine waves climbing up in frequency and for the first time I have observed them reaching above 8.971kHz, causing problems for me reciev
Interesting, thanks Jim. Eddie These vertical stripes are indeed due to harmonics of the mains frequency, specifically the 179th harmonic at nominally 8950Hz. If you watch these harmonics with, say,
All the best, Wolf . Am 07.04.2011 18:09, schrieb Roger Lapthorn: Help... After lunch today my wife turned on the washing machine and the tumble drier and for two periods there was a burst of inter
