That’s not really how it works.
The weakest signal you see typically correlates with the noise level.
That noise can picked up by the antenna which is unavoidable or it’s introduced on the signal path after the antenna.
Just the dBFS won’t tell you which of the two scenarios is your limit.
Once you optimize the gain a bit, the lowest signal number becomes a little bit more meaningful: Thoughts on optimizing gain
Because then it’s the weakest signal compared to the strongest signal.
My current view, several below -20dB
Oh yes, quite a few.
That’s a nicer dump1090 layout!
I’m trying to get my FR24 feed working with Skyaware using Wiedehopf’s script so I can use dump1090-fa 5.0, but I’m totally new to all this and can’t get it working right - just when I think I have something stops working, so I may just have to stick with the version 
Don’t mess with the fr24 settings after running my script …
Not sure how the pi24 image works exactly so that could be an issue i suppose but i don’t think so.
That the image you’re running?
It’s really not that difficult having it installed on Raspberry OS.
Follow the instructions on how to have the Raspberry running with Raspberry OS and then follow the instructions for each feeder. Most of the time the installation and the questions during it are self explaining.
I started with the FA Image first but very soon i moved over to Raspberry OS
Thanks again guys!
I’m just new to all of this - I have a technical background, but in professional audio design.
I started with a blank RPi 4 and loaded the FR24 image on it, downloaded from the FR24 wesbsite, using the Win32diskimager app.
It’s been running great, so then I ran your script you suggested, as my dump1090 was very old.
It all worked, but my RPi was still in read only mode, so I couldn’t change gains etc.
Started it all from scratch and eventually got it all working, put my RPi back in the loft and it just sat there with 0 aircraft seen or uploaded, like the FR24 feed doesn’t automatically run on a reboot.
So, what RPi OS should I install first? Rasbian Lite?
The do I run the FR24 image and then your script?
I tried this yesterday, but got loads of errors when rebooting the RPi regarding missing monitor feeds or not being able to start a whole host of things.
Sorry for being pain, but being new to RPis and ADS-B, it’s somewhat in at the deep end for me 
Raspbian Lite: ADS B receiver · wiedehopf/adsb-wiki Wiki · GitHub
That’s strange … gotta check my script then.
On the other hand i haven’t ever really tested on the pi24 image.
What is your current image, still pi24?
Hmm … might just have a look what that image does.
Can you elaborate on the read only?
What was the exact issue you observed after doing what?
Hmm … yeah the pi24 image is strange …
But it’s not readonly i don’t think that’s the issue.
When I tried to enter a --gain setting into the FR24 settings page on ipofpi:8754, the settings never saved and just reverted back.
I’ll give it another go 
I tried running your remount -rw command, but that seemed to totally throw a wobbler.
I think I got it to work by running your script on a fresh RPi install first and then ran the FR24 installation link from the RPi.
Is CF400 coax the same as LMR400?
I’ve found a local supplier of pre-made 10m runs with the correct connectors pre-installed.
Well if you run my scripts you don’t change any settings via that fr24 configuration page …
Reading the help page for the script you install should tell you how to change gain.
So you didn’t use the script but went the manual way, not even sure where that is mentioned.
It’s an old issue fr24 corrected that particular issue.
Edit: Interesting … seems on the current image modifying the settings via the page at :8754 is just completely impossible.
Oh well … whatever.
Strange isn’t it - I’ll give it another go this afternoon
Well, I bit the bullet and just ordered a Jetvision A3 antenna and 10m LMR-400 cable
Raspberry OS Lite is sufficient.
And do not run the FR24 image afterwards. It will overwrite the whole image. Use the FR24 script instead for an existing device as described here:
Many thanks @foxhunter
Thank @wiedehopf too - I’m starting from scratch now 
All sorted now - I started with a fresh RPi OS, installed the fr24feed from the command line and then ran your script. dump1090-fa is working great and the Pi is also feeding my FR24 account, so happy days.
I will repeat this for my second radar set-up and then wait for my new antenna and cable toys to arrive.
Thanks again for your help
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