Is there documentation for each of the fields in the /boot/adsb-config.txt file? I have two SDR's setup and it's unclear if I'm supposed to change DUMP978 to yes (since I have both 978 and 1090). Also, not sure how to pick the GAIN value. Anyway, documentation on those fields would be helpful for newbies like me. Thanks!
Bumping this post to the top because I have the same questions. I just got a splitter and I'm trying to set up both 978 and 1090, but now I'm picking up fewer signals. Any tips for properly setting gain?
gain for 978 is in /etc/default/dump978-fa - as of December 6th, 2020, it will change in future releases. Upping gain past 36-40 doesn't make things better. dump978-fa, particularly the SoapySDR driver used is problematic. I would also change the --sdr arg and add serial of 978 SDR --sdr driver=rtlsdr,serial=978 so you have /etc/default/dump978-fa with Code: ENABLED=yes RECEIVER_OPTIONS="--sdr-gain 49 --sdr driver=rtlsdr,serial=978--format CS8" DECODER_OPTIONS="" NET_OPTIONS="--raw-port 30978 --json-port 30979" Beyond that, depending on your install location, outdoor antenna with good coax isn't affected by splitter. Antenna will overcome any gain loss by splitter. An indoor install with already weak signals would probably lose fidelity. We use a simple 6" SMA Y splitter without issue in ADSBx installs, and LMR 195, 240, or 400 for coax.
On the broader topic of the adsb-config.txt file documentation, I agree that it would be great to have just a bit more information about the fields. Some people are confused that their receiver doesn't show up on the map, but it is because PRIVACY is set to "yes". What exactly changes when you set REMOTE to "yes"? How often are updates checked/installed if I set UPDATE to yes? What gets updated, everything? What is a SHELBOX? What changes if I set CELLULAR to yes?
That's old image that is deprecated. CELLULAR does nothing SHELLBOX disabled REMOTE does nothing UPDATE does nothing Placeholders for things that weren't needed. Feeder is set to private by default because that's the way I want it because I was tired of complaints about 'privacy'. There's is no reason to 'see my dot' on the map, it's just as stupid as "I want to see only my data on ADSBx" in my opinion. MLAT map will show your feeder name if you use the search, even if map dot is not shown. Now there are complaints about "my map does doesn't EXACTLY match my location!" No kidding, because you want it in the exact location doesn't mean everyone wants it in the exact location. I wish people understood the amount of extra work they create on crap that adds nothing of value. ADSBX is not making 100's of millions a month by selling feeder data while engaging in blocking, extortion, and general douchery. But hey, at least you get a fake ass enterprise account that makes you feel good inside while the commercial sites laugh all the way to the bank.
Thanks James, I really do appreciate you taking the time to let us know what the settings do (or don't) do anymore. And I really appreciate all the work you put in to this project and I'm glad to be able to feed data to it. I think you're right on setting the feeders to Private by default. I do like seeing only my data on the map on occasion just to see my contributions, range to aircraft, test antenna positions, etc. Thanks again, and I do wish ADSBX was making more money from the data
At this point ADSBx is not burning $10K a month on a credit card, so there's that. Dan, Wiede, Pil, myself, and others have put in litterally 1000's of hours in the last 18 months trying to get this sustainable while combating FR24 FA etc all brainwashing.
