Do I need a Filter? - Find RF Signals In Area

[bocachica@duck.com]

One of the best filters i ever had: http://shop.sysmocom.de/products/cf1090-kt30
You can see the result on: https://wolvex.nl/Airplanes.html

[Kvisko]

The next day.

First, one thing occured to me. I was using a non-name non-RTL-SDR usb card to do the mwasuring, with generic diople antenna. That might make the measurement funny. So, today I took a 1090 MHz antenna and RTL-SDR v3 usb receiver.
This is the result:


Now I see that there is a considerable noise in 1090 MHz region.
Let'e try my second location:

That's more like it!

The moral of this is - use good equipment for measuements. Preferably the one that will be used for "production".
Now, I will have to use the filter to see if it resolves my problems.
Cheers!