978 config file error? receiving 1090 aircraft data in \run\skyaware978 folder

[kenf3]

I’m trying to run 2 tuners for 1090 & 978 from the package install add-on (not PiAware SD card image).

Are the 2 correct config files located at /etc/default/dump1090-fa and /etc/default/dump978-fa?

I also have a config file at /etc/piaware.conf - not sure I should be using this one.

Any ideas what would cause 1090 aircraft data to show up in the \run\skyawre978 folder?

Forgot to mention I’m using a DIY 1/4 wave antenna with an SMA Y-cable connected to both tuners.

[obj]

@kenf3

Any ideas what would cause 1090 aircraft data to show up in the \run\skyawre978 folder?

What do you mean by "1090 aircraft data’? Maybe it’s being received on 978MHz via TIS-B?

[kenf3]

@obj

What do you mean by "1090 aircraft data’?

I saw the same aircraft in both aircraft.json files - I thought 1090 aircraft would only be in the 1090 file.

[obj]

You will see 1090-only aircraft in the 978 output if you can hear a ground station that’s retransmitting them on 978 TIS-B

[kenf3]

Are /etc/default/dump1090-fa and /etc/default/dump978-fa the correct config files to use to adjust gain for each tuner?

[jonhawkes2030]

My UAT with TIS-B Enabled

Same UAT only receiver when TIS-B unchecked

Stats over the last 48 hours. The blue line is real UAT/978Mhz aircraft

[abcd567]

@jonhawkes2030

My UAT with TIS-B Enabled

How do you enable TIS-B? I never tried and that is why I dont know it.

[jonhawkes2030]

By Default, dump978-fa displays all aircraft seen. Those directly received(uat 978Mhz) and TIS/ADS-R. If you want to only see the uat 978Mhz traffic then uncheck the TIS-B check box (Leave only the ADSB checked as you can see in my UAT only screenshot above. It is not obvious, however, in that screenshot MLAT, other and TIS-B are NOT checked.

[abcd567]

Thank you @jonhawkes2030 for clarifying.

 

 

[kenf3]

If I want to temporarily turn off the 978 tuner by setting the gain to zero, is this the correct config file to use? I am not using a PiAware SD card image.

GNU nano 5.4 /etc/default/dump978-fa

dump978-fa configuration

This is sourced by /usr/share/dump978-fa/start-dump978-fa as a

shellscript fragment.

If you are using a PiAware sdcard image, this config file is regenerated

on boot based on the contents of piaware-config.txt; any changes made to this

file will be lost.

dump978-fa won’t automatically start unless ENABLED=yes

ENABLED=yes

RECEIVER_OPTIONS=“–sdr driver=rtlsdr --format CS8”
DECODER_OPTIONS=“”
NET_OPTIONS=“–raw-port 30978 --json-port 30979”
RECEIVER_GAIN=0

[jafrank]

Setting the internal amplifier gain to zero isn’t doing to turn off the receiver dongle, it’s just going to turn off the amplifier built in to the receiver. it will still passively receive any signals strong enough to make it on their own.