Attachment...
Am 11.02.2017 14:49, schrieb DK7FC:
Hi all,
Meanwhile my 1 week taking transmission, starting 01.FEB.2017 23:30
UTC on 2970.000000 Hz at 150...170 mA is completed. I tried to leave a
trace/peak into a range beyong 3 wavelengths.
Renato Romero / IK1QFK is running a 5 uHz FFT spectrogram on 2970 Hz.
He's using a well working E field antenna in Cumiana/Italy.
The spectrogram is running since christmas evening 2016, available at
http://www.webalice.it/rromero/live_cumiana/last-LFtest_2970.jpg
There are time markers in 1 week intervals.
I can see a dash, a trace right on the frequency. It appeared 2 days
after i started transmitting, which is expected with an FFT window time
of nearly 3 days. The SNR was up to 12 dB during the visual observation
of incoming spectra.
Partly, the trace disappered during the transmission time (destructive
interference with QRN). However i can see a resulting trace of a high
average SNR and exact (!) frequency stability relative to the other
traces beeing present in the spectrogram.
I would tend to call it a serious detection of my signal. Spectrogram
experts, what's your opinion please?
The distance is quite exactly at 5 wavelength on that 101 km band!
It would be a first detection on ULF (0.3...3 kHz) between DL - I
!
73, Stefan
|
5 wavelengths on the 101 km band at 2970 Hz.jpg
Description: JPEG image
|
