FlightAware Discussions

Fine Tuning the Pre-Amplifier

Hello All, I’m using an External Aerial connected to the Pre-Amplifier, Filter and FlightAware Pro USB Stick to my Pi4 and I’m getting great results.

However there seems to be some parameters that can be changed to amend the gain.

What recommendations do you have for fine tuning the gain to optimise fully my set up?

Thanks

Setting the gain properly is very often try&error

It heavily depends on the area and the possible obstacles including frequencies around you.
A good starting point is installing the graphs1090 of @wiedehopf he provides on his Github page.
Then change the gain for one day and compare the results.
You should also check on heywhatsthat.com your max. possible range

There are also some great threads in this forum with plenty of information. e.g.

I’d probably add this: Automatic gain optimization for readsb and dump1090 fa · wiedehopf/adsb-scripts Wiki · GitHub

And this: GitHub - wiedehopf/tar1090: Provides an improved webinterface for use with ADS-B decoders readsb / dump1090-fa

3 Likes

Noticed with the latest Piaware 5.0 the script for % strong messages doesn’t seem to work.
It’s a great way to tune the gain on the 1090 receiver.
Actually just tried it again and now it does work. Odd…