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<blockquote data-quote="deeptho" data-source="post: 1143382" data-attributes="member: 215446">The DVB card is the spectrum analyser. It is pretty accurate.I put it on two dishes in two different places. I will test (weekend) soemtime with a wet cloth in front of the LNB.The spikes are pretty stable in frequency.That is a good test. I will perform it during the weekend. However, I am pretty sure this is not interference.Yes, I thought of that. Makes no difference. I tried both on and off.At least my cheap chinese C-Band LNB does its job well, which shows that not everything made in China is bad. The problem is the following: the factories which produce the good stuff for some customer also&nbsp; sell the rejects and/ormake some addiitonal batches without much queality control and then also sell that. You get what you pay for.I once visited an electronics super market in Shenzhen where you could by all kinds of components and devices in bulk.That was interesting. I bought a few drones, which turned out to be crap (and cheap). I was looking for something else but never found it. If you ever visit Shenzhen, then you will find that in pure chinese tradition&nbsp; there is a local Eifel tower, the Egyptian pyramids, Taj Mahal etc.&nbsp; all conveniently located in one place. Much cheaper than a trip around the world. All of this was pre-covid and now times have changed.</blockquote>

[QUOTE="deeptho, post: 1143382, member: 215446"] The DVB card is the spectrum analyser. It is pretty accurate. I put it on two dishes in two different places. I will test (weekend) soemtime with a wet cloth in front of the LNB. The spikes are pretty stable in frequency. That is a good test. I will perform it during the weekend. However, I am pretty sure this is not interference. Yes, I thought of that. Makes no difference. I tried both on and off. At least my cheap chinese C-Band LNB does its job well, which shows that not everything made in China is bad. The problem is the following: the factories which produce the good stuff for some customer also sell the rejects and/or make some addiitonal batches without much queality control and then also sell that. You get what you pay for. I once visited an electronics super market in Shenzhen where you could by all kinds of components and devices in bulk. That was interesting. I bought a few drones, which turned out to be crap (and cheap). I was looking for something else but never found it. If you ever visit Shenzhen, then you will find that in pure chinese tradition there is a local Eifel tower, the Egyptian pyramids, Taj Mahal etc. all conveniently located in one place. Much cheaper than a trip around the world. All of this was pre-covid and now times have changed. [/QUOTE]

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