A gain of 0 is 55 less than -10 approximately.
Running a gain of 0 with your setup would give you 0% >-3dB, i would pretty much bet on it.
According to your stats page you are using the installed version, not the piaware sd-card version.
That means you need to set the gain in /etc/default/dump1090-fa, not with piaware-config.
See case 2 of this post to see how to do it: For Beginners - How to Set / Change Gain
-10 is equal to around 55 in most cases.
Next lower gain value is 49.6
You could try a gain of 40 and then 35 probably.
The LNA is very nice but you should try and put it before the 50 m of coax.
You sure you don’t mean 50 ft?
Anyway putting the LNA in front of the coax run or wherever the cable comes into the house is probably connected to getting new cables, so at the end of the run will have to do for now.
Thanks! I cancelled the order for now, as if Im running -10 i need to find out what I can get if my signal is too strong before spending $30 on the device and another 10-15 on a power supply. I saw the 5V input (from the other page) and it looked like it was powered with USB micro - im sure theres an all in one that will do that, so if I need, ill look for that.
But back to square one.
heres the output from
sudo systemctl status dump1090-fa -l
dump1090-fa.service - dump1090 ADS-B receiver (FlightAware customization)
Loaded: loaded (/lib/systemd/system/dump1090-fa.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2019-07-04 22:59:35 EDT; 11h ago
Docs: PiAware - ADS-B and MLAT Receiver - FlightAware
Main PID: 7305 (dump1090-fa)
CGroup: /system.slice/dump1090-fa.service
└─7305 /usr/bin/dump1090-fa --device-index 0 --gain -10 --ppm 0 --net-bo-port 30005 --max-range 360 --net --ne
Gain set to -10 and AGC enabled so…
I was editing the PiAware.conf as I saw on the FA page, as the /boot/piaware-config.txt wasnt there, so it said to edit the /etc/Piaware.conf
oh well. Ill try some more and let you all know the results.
You can feed the bias-t with the 3.3 V or 5 V from the Raspberry Pi.
(from the GPIO pins)
You’ll still need some jumper wires to connect to the pin header unless you feed comfortable soldering to the back side
But yeah try to figure out how to change the gain first. (edit /etc/default/dump1090-fa)
I linked you a post where the different methods needed depending on the software in use are explained.
I have updated the script to generate a performance graph - it now includes colouring points by range, and some box plots to show data distribution. The data displayed is over the previous week.
pi@raspberrypi:~ $ sudo bash -c "$(wget -q -O - https://raw.githubusercontent.com/wiedehopf/adsb-wiki/master/caius_scatter_plot.sh)"
Processing RRD data
Generating plot
bash: line 39: gnuplot: command not found
Moving plot
cp: cannot stat '/tmp/range.png': No such file or directory
1230 1.3447854189e+04 -1.20e+07 1.23e-03 -3.606918e-01 8.626150e+01 -6.107151e+03 6.141043e+03
1231 1.3447854189e+04 -1.49e+00 1.23e-04 -3.606918e-01 8.626150e+01 -6.107151e+03 6.141043e+03
1232 1.3447854189e+04 -2.71e-01 1.23e-05 -3.606918e-01 8.626150e+01 -6.107151e+03 6.141043e+03
iter chisq delta/lim lambda a b c d
After 1232 iterations the fit converged.
final sum of squares of residuals : 13447.9
rel. change during last iteration : -2.70525e-15
degrees of freedom (FIT_NDF) : 72
rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 13.6666
variance of residuals (reduced chisquare) = WSSR/ndf : 186.776
Final set of parameters Asymptotic Standard Error
======================= ==========================
a = -0.360692 +/- 0.2496 (69.2%)
b = 86.2615 +/- 53.44 (61.95%)
c = -6107.15 +/- 3707 (60.7%)
d = 6141.04 +/- 807.7 (13.15%)
correlation matrix of the fit parameters:
a b c d
a 1.000
b -0.996 1.000
c 0.983 -0.995 1.000
d 0.515 -0.437 0.347 1.000
Moving plot
Ah, you appear to have uncovered a problem with the label positioning. I’ll have to have a look and see if I can get gnuplot to use relative positions rather than absolute.
Edit - this should be possible - I just have to figure out the correct format and update it.
@abcd567 The labels should now show in their proper position if you run the script again.
As wiedehopf said, the script attempts to pull data from the dates shown at the top of the graph, but if those that data doesn’t exist then it won’t throw up any errors but just plot what is available.
Just to clear things up: the graphs made with GNUplot are best made against the RRD files made with @wiedehopf his script “graphs1090”, right? Not against the ones the ADS-B Receiver Project creates.
