Air Traffic Monitoring > Feed Setup Pictures

RTL-SDR Raspbeery Pi recommanded setup

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lbouchard:
Many people are asking.
I think it is time to publish hardware and software recommended setup.
For single, dual and four SDRs on a raspberry pi.

dave:
We deal with individuals on a one-on-one basis right now since they need to get connection information from us anyway. There is no "one size fits all" install and in some cases, SDR's are not even suitable, especially for on-airport installs. So for now we consult with potential feed providers to make sure they end up with the right solution for their situation.

rvt:
can you explain I a few sentences what the issue is when using SDR?

dave:
The issue with SDRs when used "on airport" is overload - dynamic range. In other words, strong signals (which all of them are) will cause the receiver to overload and produce very distorted (or no) audio. The "cure" is to reduce the gain (sensitivity) of the SDR - but that sometimes greatly reduces the range of signal pickup. This is typically not an issue when at least 0.5 to 1 mile form the airport.

rvt:
Makes perfect sense, Not sure if these SDR's have some hardware AGC implemented (or even if that is possible due to the way they work).

we will keep that in consideration finalising our setup.

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