First… Helle my name is Remon and i’am from holland. i am a flightAware user.
Well i have an antenna on my roof with 7.5m cable to the flightaware pro sick. Well i recieve 250 planes then (averrage). When i connect de flightaware stich directly to the antenna then i recieve about 100 planes less (about 160 planes averrage). So i receive less planes without coax cable and i touht i reduce the lengt of the cable to make the signal better but that isn’t.
Is it better to have a cable between the antenna and the flight aware stick?? or are there other soluions to make the sinal better?
Now i’m thingking to place a cable, about 2m to look if it is better then, now i have a 7.5m cable what is to long now, beceause the stick is nearly the antenna.
Well hope someone has ideas…
Thanks so far.
Ok yes that could also be the problem. but how can i change the gain? I have read about somthing about t change the gain in a newsletter from flightaware by changing piaware config file, but i don’t have that file. Link from the news letter: flightaware.us14.list-manage1.co … 10443339ee
well the link from the newsletter doesn’t work anymore.
The problem is the file piaware-config.txt file doesn’t exisist. And if i creat e a file it give no change. so perhaps someone can help me a bit.
perhaps a link to a topic???
ok if i understud it then i can change the file, and the gain by typing:
sudo piaware-config rtlsdr-gain (a number)
ok that wil work. my question is this ok? and whagt range can i give it. is it between -1 and -10 (default) or can it be positive? and do i need to restart piaware? if i change it now it does not change somthing but now i have my coax cable 7.5 m. Ok i can remove it and test it without the cable.
(2) Gain should be positive number between zero and 50. The ONLY negative value used is -10, which sets gain to AGC (automatic gain control). Any other negative number sets the gain to Zero.
(3) Value of gain depends on location and placement and type of antenna, length of coax cable. It varies for each receiver. Generally gain is set between 25 and 40 by most users. For my setup, 30 gives good result. I found this by trial & error. For your setup, you have to try different gain values to find which one gives you best result.
Ok i will play with the settings between 0 and 40. i need also remove my (to long) coax cable, so i need to go on my roof.
If i change the value, do i need restart dump1090, piaware, the device or has the changes effect without any restart??
ok obviously i have the rasbian installation and not the piaware image. I have done some installations before also the piaware image. i did some experiments and i think this when this was working i used it. so i didn’t know it anymore.
Well if i eddit de file dump1090-fa in /etc/default en do a restart sudo systemctl restart dump1090-fa then i see effect. so that works for me.
Now i want to experiment with the piaware stick directly on the antenna and play with the gain and hope that i receive better.
Well i also orderd a new antenna special for receiving ads-b signals (i have one, but this one is also longer).
I will let it know if i fif some experiment without the to long coax cable (and with my new antenna.
Side note: You don’t need to remove the cable if you lower the gain anyway. Only if you need the maximum gain, then you can add a few dB by eliminating the cable. For me, I have a 5m cable, a filter (2.2dB loss) and still use only 42dB gain (from the max around 55).