SDRplay Community Forum

For unwanted emissions from cable TV there are tight noise limits in Germany (likewise for FM transmitters for mp3 players or similar, opposite to PLC where the regulations are very loose). When informing the authorities there is more chance to stop such RFI than stopping PLC. This is what the staff...

The major problem is not RFI created in our own house or created by the construction of the receiver itself (shielding, computer noise a.s.o). We BCLs all normally have the technical skill to overcome such noise with shielding, choke filters, common mode chokes, grounding, galvanic isolation, whatev...

Heinrich I tried to reply to your PM but it seems you have opted to no receive PMs from other members. Not important though. Thanks, there seems to be a problem with my email account. But no so important. We cannot do anything against the QRM anyway. And yes, I know that 100 kHz spaced harmonics of...

CaptainNemo wrote:chasing unwanted signals is an other new flavor of our hobby ...

Yes. I already tried the "Worked All PLC" award. But my neighbours did not send QSL cards for my reception reports.
73, Heinrich

13dka, we BCLs and hams do not have the power, influence and money to go into lawsuits. And the outcome of such lawsuits is uncertain. We had some cases in Germany where the filers lost. And even if you should win a lawsuit against one of your neighbours: When you come home from court three other ne...

Well, I really do not want to swing the hammer of Eurosceptics. But European standards have often undermined more practical local standards. E. g. in my PLC example the noise clearly offended the previous German regulations of electromagnetic conformity. But the "harmonised" European law rules now. ...

I suspect harmonics of the charching dock of a lawn mow robot or a photovoltaic inverter. The harmonics of my eastern neighbour's lawn mowing robot are relatevily stable. Harmonics of TV, monitor power supplies often "wobble". The photovoltaic inverter of a neighbour 80 m away also shows such pulsin...

Might be time that some rich man/woman complains at the Eropean court of human rights because of offending free access to broadcast listening and media. But even the German amateur radio club could not do anything against the latest German law about electromagnetic compliance from September 2016 whi...

Are these PLC modems susceptible to any kind of interference that would make them inoperative? Partly. Transmitting with appr. 100...300 W on a ham band in the vicinity (appr. 20 m) of such PLC makes them inoperative. But they are very insensitive. They work with signals af around 175 mV and you ha...

Could it be a PLC/PLT modem? The ham notch of the 20 m band should be seen a bit clearer. And the waterfall lines should be interrupted rhythmically (unless the modem is in full streaming mode). See jpsa's examples! It could be, but then it is fortunately a weaker, more distance one. Have a look at...