Hi Peter,
The incident was also visible on the NB-Transponder where all signals - including the beacons - faided away for some 30 sec.
73 Jean DJ0VL
Hi Peter,
On the NB-Transponder, the signal seemed to move in from lower frequencies, see the noise level shape. A few seconds after taking the screenshot, a huge signal (20 or more carriers spread around 100 kHz) swept in from the lower band end. Unfortunately, the signal was shut down before I could make another screenshot.
73 Jean DJ0VL
Hi Peter, despite I was not home last Thursday evening (and therefore couldn't witness the issue)
perhaps the AGC values of the NB-transponder (when they are logged) may give a clue?
This is what I saw on 23-6 at 11:29 CET, in my opinion a pretty powerful signal including splatter for 25 seconds at 433.830 MHz on the SDR
As was said in other thread current guidelines describe it bad.
I was sending "big" signals many times and those didn't trigger any alarms. I can help You formulate what is "safe" based on my experience.
WB monitor does not help a lot understanding power on QO-100 as scale is logarithmic....
Most think that power is proportional to area of the signal - it isn't.
17db 333kS signal (32APSK minimal) is same power as 5MS 5db one. (yet both alone didn't trigger alerts)
Two or three such 333K 32APSK signals are sure enough.
There is also scenario when transponder is overpowered by many powerfull narrow signals, and altough any single person is not at will to overpower it result is the same.
WB monitor should have better calculations for signal power and also calculate totals.
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Ernst PA1EJO - no that's nowhere near powerful signal. On NB signal from "standard DATV PA" will make all other transmissions vanish. NB and DATV transponders work at very different power levels.
