gain setting?

[g4ea5]

Hello,

I have a raspberry pi2 connected to a rtl-sdr dongle,

on the settings page
http://192.168.1.100:8754/settings.html

I have it set to default
--net --gain -10

if I try to set a different gain for example --gain -15 , --gain 5, --gain -20 I receive nothing at all! it only appears to work on -10

If I remove the --gain -10 setting and set --enable-agc it works again but I cannot really tell if its better or worse than -10 gain

the question is why cant I use other gain settings other than -10 ?

and why minus? Is minus a higher gain than 10 without the minus?

I thought that a while back I had the gain set to 34 without the minus and it was better as I had more plains but now it doesnt seam possible to set gain 34

how can I view the actual signal strength from the pi? how do I know what is the best setting as the amount of planes are constantly changing.

Thanks

[Oblivian]

If you search for gain there is a thread dedicated to it

-10 is automatic or something close to max.

Other values used have to be positive numeric and only particular values the software is expecting, seen by using RTL test

[g4ea5]

If you search for gain there is a thread dedicated to it

-10 is automatic or something close to max.

Other values used have to be positive numeric and only particular values the software is expecting, seen by using RTL test

Thanks, I forgot the gain values had to be the ones shown in the test , that's why the ones I tried didn't work.

The Gain Optimization Script looks promising.

https://forum.flightradar24.com/foru...ization-script