British Forum > OGN-R PilotAware
New PAW / OGN station seems to be deaf to FLARM?
Kevin W:
Hi
I have setup a brand new PAW / OGN station. Pi 2 + Bridge + NESDR Dongle + follow the instructions for a fresh install of the combined PAW & OGN software.
It is called EGBKE and it is East of EGBK! :)
It can see Pilot Aware traffic (well my PAW box on the other side of the room anyway), but it hasn't seen any FLARM traffic all afternoon, despite some in the vicinity and being picked up by stations much further away.
I tried a reboot, I tried an update (http://pilotaware.lode.co.uk/downloads/OGN/README.update), but no change.
I show up on all the OGN maps, but sometimes as Blue, not Green - which I think suggests a software version issue? I can see my PAW box being uploaded to the OGN network.
Any ideas?
Thanks very much
Kev
8080:
--- Code: ---RTLSDR OGN RF processor 0.2.6.RPI-GPU/Mar 31 2017
System
Host name ognpaw
Configuration file path+name /home/pi/rtlsdr-ogn-0.2.6/rtlsdr-ogn-paw.conf
Local time 16:35:39
Software 0.2.6.RPI-GPU
CPU load 0.0/0.2/0.4
RAM [free/total] 593.3/970.5 MB
CPU temperature +50.3 ℃
NTP UTC time 16:35:39
NTP est. error 25.6 ms
NTP freq. corr. -2.35 ppm
RTL-SDR device #0
Name Generic RTL2832U OEM
Tuner type R820T
Manufacturer Realtek
Product RTL2838UHIDIR
Serial 00000001
Center frequency 868.303 MHz
Sample rate 1.000 MHz
Frequency correction +0.6 ppm
Life Time 96.7% ppm
RTL Xtal 28.800000 MHz
Tuner Xtal 28.800000 MHz
RF
RF.FreqPlan 1: Europe/Africa
RF.Device 0
RF.SampleRate 1.0 MHz
RF.FreqCorr +0 ppm
RF.FreqRaster 28125 Hz
RF.OffsetTuning 0
Fine calib. FreqCorr +0.6 ppm
RF.PulseFilter.Threshold 0
RF.PulseFilter duty 0.0 ppm
RF.OGN.GainMode 1
RF.OGN.Gain 60.0 dB
RF.OGN.StartTime 0.375 sec
RF.OGN.SensTime 0.850 sec
RF.OGN.SaveRawData 0 sec
RF.GSM.CenterFreq 937.0 MHz
RF.GSM.Gain 35.0 dB
RF.GSM.SensTime 0.250 sec
--- End code ---
8081:
--- Code: ---RTLSDR OGN demodulator and decoder 0.2.6.RPI-GPU/Mar 31 2017
System
Host name ognpaw
Configuration file path+name /home/pi/rtlsdr-ogn-0.2.6/rtlsdr-ogn-paw.conf
Local time 16:36:32
Software RTLSDR-OGN 0.2.6.RPI-GPU
CPU load 0.6/0.3/0.4
RAM [free/total] 592.0/970.5 MB
CPU temperature +50.8 ℃
NTP UTC time 16:36:32
NTP est. error 25.6 ms
NTP freq. corr. -2.35 ppm
Position
Position.Latitude +52.32274 deg
Position.Longitude -000.70622 deg
Position.Altitude 92 m
Position.GeoidSepar +48 m
RF
RF.FreqPlan 1: Europe/Africa
RF input noise +0.6 dB
Demodulator
Demodulator.DetectSNR 10.0 dB
Demodulator.PipeName ogn-rf.fifo
Demodulator.ScanMargin 20.0 kHz
Traffic rates [visible/all]
Aircrafts received over last 12 hours 0/ 0
Aircrafts received over last hour 0/ 0
Aircrafts received over last minute 0/ 0
Positions received over last minute 0/ 0
APRS
APRS.Server[0] -> aprs.glidernet.org:14580
connected to 85.188.1.173:14580
connected for 00h38
KiloBytes sent/received 1/9
APRS.Call EGBKE
APRS.Icon I&
APRS.FilterRange 0.0 km
APRS.Beacon.Interval 300 sec
APRS.Status.Interval 300 sec
APRS.MaxBitError 16 bit
APRS.HighResolution 1
APRS.SAR 1
APRS.PositionInterval 20 sec
APRS.MaxDistError 20 m
APRS.ReportDelay 5 sec
DDB
DDB.RefreshInterval 0
DDB.UseAsWhitelist 0
APRS beacon:
EGBKE>APRS:/163511h5219.36NI00042.37W&/A=000302
APRS status:
EGBKE>APRS:>163511h v0.2.6.RPI-GPU CPU:0.2 RAM:593.5/970.5MB NTP:25.6ms/-2.4ppm +50.3C 0/0Acfts[1h] RF:+0+0.6ppm/+0.25dB
--- End code ---
8082:
--- Code: ---Version 20170916 : Date 2017-09-18 16:36:58 : Station PWEGBKE
P3I Packets OK=1217 NG=68
ICAO Type Dist(KM) Alt(FT) Uplink
401292 PAW 0.00 288 -
--- End code ---
Ben Smith:
Kevin,
Sorry if this seems obvious, but a number of OGN builders have mistakenly ended up buying antenna cables with RP-SMA connectors, the end with the screwed sleeve needs to have a pin in the centre, the RP ones have a hole, they screw together fine but you get no antenna connection.
If this is the case a simple work-around is to snip off a bit of resistor lead or similar wire and use it as a makeshift centre pin.
Looking at your gain your RF noise and CPU load should be quite a lot higher if there was any signal.
The other possibility is a faulty SDR
Ben.
Keithvinning:
Kev
What OGN antenna are you using
Did it pass all the adjustment tests in the config program
Can send a screenshot
Keith
Kevin W:
Hi Keith / Ben, Thanks for the replies.
Yes using SMA, not RP-SMA connectors that include the pin (never any silly questions!).
Tried 2 antennas, I had it on a Diamond X50 collinear that is outside on a pole on the chimney most of the afternoon and gets me pretty good range Rx on 1090mhz for ADSB. This evening I have switched it over to the 868.3 9dbi collinear that I am 'looking after' for you Keith, but in the loft rather than outside. Obviously little to no FLARM traffic around this evening so will leave it on that antenna for tomorrow.
Stopping the software and doing a GSM scan now looks ok to my untrained eye:
--- Code: ---Frequency = 920.000MHz..960.200MHz 2.000MHz step, 20 scans
Sampling rate = 2000000Hz = 2.000MHz
0.250sec per scan
FFT: 1024 bins, 1953.1Hz/bin, 0.256ms/slide
Found Rafael Micro R820T tuner
Exact sample rate is: 2000000.052982 Hz
RTLSDR::Open(0,940100000,2000000) => Generic RTL2832U OEM, 940.100 MHz, 2.000 Msps
RTLSDR::Gain[29] = +0.0 +0.9 +1.4 +2.7 +3.7 +7.7 +8.7 +12.5 +14.4 +15.7 +16.6 +19.7 +20.7 +22.9 +25.4 +28.0 +29.7 +32.8 +33.8 +36.4 +37.2 +38.6 +40.2 +42.1 +43.4 +43.9 +44.5 +48.0 +49.6 [dB]
Open(0, 940100000, 2000000) OK
Tuner crystal correction set to 0 ppm
Tuner gain set to 20.0 dB (device reports 20.0 dB)
935.200MHz: -0.8dB: +0.41 +0.17 [ppm]
935.400MHz: +3.2dB: +0.57 +0.54 +0.60 +0.54 +0.68 +0.57 [ppm]
935.800MHz: +6.1dB: +0.57 +0.72 +0.74 +0.60 +0.62 [ppm]
936.000MHz: +5.0dB: +0.41 +0.58 +0.57 +1.04 +0.51 [ppm]
936.200MHz: +3.3dB: -0.56 -0.41 -0.35 -0.41 -0.44 [ppm]
936.600MHz: +6.4dB: -0.34 -0.39 -0.36 -0.37 -0.40 [ppm]
937.000MHz: +18.6dB: -0.39 -0.36 -0.35 -0.36 -0.36 [ppm]
937.200MHz: +11.0dB: -0.39 -0.38 -0.41 -0.35 -0.43 [ppm]
937.600MHz: +16.4dB: -0.31 -0.34 -0.35 -0.27 -0.33 -0.33 [ppm]
938.000MHz: +0.1dB: +0.50 -0.30 -0.25 -0.47 [ppm]
938.600MHz: +10.1dB: -0.35 -0.39 -0.36 -0.34 -0.32 [ppm]
938.800MHz: +7.9dB: -0.27 -0.35 -0.39 -0.38 -0.30 -0.36 [ppm]
939.000MHz: +7.3dB: -0.31 -0.36 -0.36 -0.42 -0.44 [ppm]
939.400MHz: +0.3dB: -0.57 -0.37 -0.46 -0.14 -0.30 [ppm]
939.600MHz: +8.0dB: -0.26 -0.30 -0.25 -0.32 -0.27 -0.30 [ppm]
952.400MHz: +1.2dB: +0.38 +0.60 +0.33 +0.81 [ppm]
955.200MHz: +3.4dB: -0.29 -0.24 -0.35 -0.37 -0.37 -0.33 [ppm]
955.400MHz: +5.9dB: -0.30 -0.40 -0.34 -0.38 -0.29 [ppm]
955.600MHz: -1.4dB: -0.18 +0.07 [ppm]
955.800MHz: +1.5dB: -0.74 -0.47 [ppm]
956.000MHz: +13.8dB: -0.27 -0.27 -0.25 -0.24 -0.25 -0.25 [ppm]
956.400MHz: +7.4dB: -0.38 -0.52 -0.47 -0.38 -0.35 -0.40 [ppm]
956.800MHz: -0.5dB: -0.23 -0.22 -0.28 -0.36 -0.37 [ppm]
957.000MHz: +4.2dB: -0.55 -0.35 -0.35 -0.23 -0.38 [ppm]
957.400MHz: +0.8dB: -0.15 -0.28 -0.24 [ppm]
958.000MHz: +5.7dB: -0.25 -0.31 -0.30 -0.29 -0.30 -0.22 [ppm]
958.200MHz: +8.1dB: +0.55 +0.57 +0.52 +0.54 +0.54 [ppm]
958.400MHz: +1.2dB: +0.44 +0.90 +0.40 +0.48 [ppm]
958.600MHz: +5.3dB: +0.93 +0.63 +0.66 +0.62 +0.62 [ppm]
959.000MHz: +20.1dB: +0.63 +0.60 +0.58 +0.59 +0.61 +0.58 [ppm]
959.400MHz: +4.2dB: +0.62 +0.54 +0.73 +0.71 +0.74 [ppm]
959.600MHz: +7.9dB: +0.66 +0.57 +0.62 +0.58 +0.66 [ppm]
Receiver Xtal correction = 0-0.150 = -0.150 (0.299) ppm [79]
Note: when the receiver warms up the Xtal may drift 5-10ppm
--- End code ---
Turning the gain right down still picks up some signals:
--- Code: ---Frequency = 920.000MHz..960.200MHz 2.000MHz step, 20 scans
Sampling rate = 2000000Hz = 2.000MHz
0.250sec per scan
FFT: 1024 bins, 1953.1Hz/bin, 0.256ms/slide
Found Rafael Micro R820T tuner
Exact sample rate is: 2000000.052982 Hz
RTLSDR::Open(0,940100000,2000000) => Generic RTL2832U OEM, 940.100 MHz, 2.000 Msps
RTLSDR::Gain[29] = +0.0 +0.9 +1.4 +2.7 +3.7 +7.7 +8.7 +12.5 +14.4 +15.7 +16.6 +19.7 +20.7 +22.9 +25.4 +28.0 +29.7 +32.8 +33.8 +36.4 +37.2 +38.6 +40.2 +42.1 +43.4 +43.9 +44.5 +48.0 +49.6 [dB]
Open(0, 940100000, 2000000) OK
Tuner crystal correction set to 0 ppm
Tuner gain set to 20.0 dB (device reports 20.0 dB)
935.200MHz: -0.8dB: +0.41 +0.17 [ppm]
935.400MHz: +3.2dB: +0.57 +0.54 +0.60 +0.54 +0.68 +0.57 [ppm]
935.800MHz: +6.1dB: +0.57 +0.72 +0.74 +0.60 +0.62 [ppm]
936.000MHz: +5.0dB: +0.41 +0.58 +0.57 +1.04 +0.51 [ppm]
936.200MHz: +3.3dB: -0.56 -0.41 -0.35 -0.41 -0.44 [ppm]
936.600MHz: +6.4dB: -0.34 -0.39 -0.36 -0.37 -0.40 [ppm]
937.000MHz: +18.6dB: -0.39 -0.36 -0.35 -0.36 -0.36 [ppm]
937.200MHz: +11.0dB: -0.39 -0.38 -0.41 -0.35 -0.43 [ppm]
937.600MHz: +16.4dB: -0.31 -0.34 -0.35 -0.27 -0.33 -0.33 [ppm]
938.000MHz: +0.1dB: +0.50 -0.30 -0.25 -0.47 [ppm]
938.600MHz: +10.1dB: -0.35 -0.39 -0.36 -0.34 -0.32 [ppm]
938.800MHz: +7.9dB: -0.27 -0.35 -0.39 -0.38 -0.30 -0.36 [ppm]
939.000MHz: +7.3dB: -0.31 -0.36 -0.36 -0.42 -0.44 [ppm]
939.400MHz: +0.3dB: -0.57 -0.37 -0.46 -0.14 -0.30 [ppm]
939.600MHz: +8.0dB: -0.26 -0.30 -0.25 -0.32 -0.27 -0.30 [ppm]
952.400MHz: +1.2dB: +0.38 +0.60 +0.33 +0.81 [ppm]
955.200MHz: +3.4dB: -0.29 -0.24 -0.35 -0.37 -0.37 -0.33 [ppm]
955.400MHz: +5.9dB: -0.30 -0.40 -0.34 -0.38 -0.29 [ppm]
955.600MHz: -1.4dB: -0.18 +0.07 [ppm]
955.800MHz: +1.5dB: -0.74 -0.47 [ppm]
956.000MHz: +13.8dB: -0.27 -0.27 -0.25 -0.24 -0.25 -0.25 [ppm]
956.400MHz: +7.4dB: -0.38 -0.52 -0.47 -0.38 -0.35 -0.40 [ppm]
956.800MHz: -0.5dB: -0.23 -0.22 -0.28 -0.36 -0.37 [ppm]
957.000MHz: +4.2dB: -0.55 -0.35 -0.35 -0.23 -0.38 [ppm]
957.400MHz: +0.8dB: -0.15 -0.28 -0.24 [ppm]
958.000MHz: +5.7dB: -0.25 -0.31 -0.30 -0.29 -0.30 -0.22 [ppm]
958.200MHz: +8.1dB: +0.55 +0.57 +0.52 +0.54 +0.54 [ppm]
958.400MHz: +1.2dB: +0.44 +0.90 +0.40 +0.48 [ppm]
958.600MHz: +5.3dB: +0.93 +0.63 +0.66 +0.62 +0.62 [ppm]
959.000MHz: +20.1dB: +0.63 +0.60 +0.58 +0.59 +0.61 +0.58 [ppm]
959.400MHz: +4.2dB: +0.62 +0.54 +0.73 +0.71 +0.74 [ppm]
959.600MHz: +7.9dB: +0.66 +0.57 +0.62 +0.58 +0.66 [ppm]
Receiver Xtal correction = 0-0.150 = -0.150 (0.299) ppm [79]
Note: when the receiver warms up the Xtal may drift 5-10ppm
--- End code ---
Turning the gain up does give the odd inconsistency:
939.800MHz: +12.8dB: +157.07 +164.81 [ppm]
958.800MHz: +21.4dB: -15.26 -12.18 -12.31 -16.32 [ppm]
--- Code: ---Frequency = 920.000MHz..960.200MHz 2.000MHz step, 20 scans
Sampling rate = 2000000Hz = 2.000MHz
0.250sec per scan
FFT: 1024 bins, 1953.1Hz/bin, 0.256ms/slide
Found Rafael Micro R820T tuner
Exact sample rate is: 2000000.052982 Hz
RTLSDR::Open(0,940100000,2000000) => Generic RTL2832U OEM, 940.100 MHz, 2.000 Msps
RTLSDR::Gain[29] = +0.0 +0.9 +1.4 +2.7 +3.7 +7.7 +8.7 +12.5 +14.4 +15.7 +16.6 +19.7 +20.7 +22.9 +25.4 +28.0 +29.7 +32.8 +33.8 +36.4 +37.2 +38.6 +40.2 +42.1 +43.4 +43.9 +44.5 +48.0 +49.6 [dB]
Open(0, 940100000, 2000000) OK
Tuner crystal correction set to 0 ppm
Tuner gain set to 50.0 dB (device reports 50.0 dB)
923.800MHz: +14.1dB: +0.73 +0.65 +0.67 +0.69 +0.79 [ppm]
935.200MHz: +18.5dB: +0.49 +0.46 +0.54 +0.51 +0.47 [ppm]
935.400MHz: +24.9dB: +0.64 +0.63 +0.62 +0.62 +0.64 +0.62 [ppm]
935.600MHz: +17.5dB: +0.71 +0.73 +0.77 +0.81 +0.68 +0.73 [ppm]
935.800MHz: +27.4dB: +0.68 +0.69 +0.65 +0.63 +0.67 [ppm]
936.000MHz: +27.2dB: +0.63 +0.82 +0.57 +0.62 +0.69 [ppm]
936.200MHz: +24.5dB: -0.40 -0.37 -0.36 -0.34 -0.34 [ppm]
936.600MHz: +28.3dB: -0.31 -0.32 -0.31 -0.34 -0.35 [ppm]
937.000MHz: +41.0dB: -0.33 -0.34 -0.35 -0.33 -0.34 -0.34 [ppm]
937.200MHz: +33.2dB: -0.27 -0.28 -0.28 -0.25 -0.26 [ppm]
937.600MHz: +38.7dB: -0.28 -0.28 -0.28 -0.27 -0.28 [ppm]
938.000MHz: +21.0dB: -0.17 -0.38 [ppm]
938.400MHz: +15.9dB: +0.26 -0.85 [ppm]
938.600MHz: +32.2dB: -0.39 -0.36 -0.32 -0.37 -0.37 [ppm]
938.800MHz: +31.0dB: -0.31 -0.32 -0.30 -0.32 -0.31 [ppm]
939.000MHz: +28.6dB: -0.32 -0.33 -0.33 -0.24 -0.28 [ppm]
939.400MHz: +20.6dB: -0.39 -0.26 -0.51 -0.46 -0.31 -0.42 [ppm]
939.600MHz: +30.9dB: -0.26 -0.29 -0.27 -0.28 -0.27 [ppm]
939.800MHz: +12.8dB: +157.07 +164.81 [ppm]
952.400MHz: +18.5dB: +0.55 +0.58 +0.58 +0.53 +0.50 +0.55 [ppm]
955.200MHz: +23.2dB: -0.29 -0.26 -0.31 -0.29 -0.24 [ppm]
955.400MHz: +26.9dB: -0.29 -0.23 -0.24 -0.30 -0.27 [ppm]
955.600MHz: +15.3dB: -0.32 -0.64 -0.44 -0.33 -0.12 [ppm]
955.800MHz: +20.7dB: -0.76 -0.75 -0.92 -0.55 [ppm]
956.000MHz: +35.2dB: -0.28 -0.24 -0.24 -0.25 -0.24 [ppm]
956.400MHz: +28.2dB: -0.26 -0.21 -0.33 -0.31 -0.27 [ppm]
956.800MHz: +17.7dB: -0.44 -0.32 -0.28 -0.26 -0.32 [ppm]
957.000MHz: +24.8dB: -0.28 -0.31 -0.25 -0.24 -0.31 -0.27 [ppm]
957.400MHz: +19.4dB: -0.21 -0.41 -0.30 -0.26 -0.08 -0.27 [ppm]
957.600MHz: +14.3dB: -0.12 -0.17 [ppm]
957.800MHz: +14.1dB: -0.72 -0.09 [ppm]
958.000MHz: +26.4dB: -0.18 -0.25 -0.25 -0.23 -0.21 [ppm]
958.200MHz: +28.8dB: +0.57 +0.59 +0.58 +0.57 +0.59 [ppm]
958.400MHz: +21.0dB: +0.61 +0.63 +0.40 +0.57 +0.70 [ppm]
958.600MHz: +26.1dB: +0.56 +0.59 +0.66 +0.66 +0.64 +0.59 [ppm]
958.800MHz: +21.4dB: -15.26 -12.18 -12.31 -16.32 [ppm]
959.000MHz: +41.6dB: +0.67 +0.64 +0.64 +0.65 +0.64 [ppm]
959.400MHz: +25.5dB: +0.71 +0.70 +0.68 +0.69 +0.79 +0.63 [ppm]
959.600MHz: +29.2dB: +0.68 +0.67 +0.70 +0.67 +0.70 [ppm]
959.800MHz: +16.4dB: +0.79 +0.52 +0.55 [ppm]
Receiver Xtal correction = 0-0.015 = -0.015 (0.372) ppm [96]
Warning: measurements appear inconsistent:
please retry with better initial estimate or with lower gain to reduce distortions
Note: when the receiver warms up the Xtal may drift 5-10ppm
--- End code ---
Kevin W:
--- Quote from: Ben Smith on September 18, 2017, 09:19:57 pm ---Looking at your gain your RF noise and CPU load should be quite a lot higher if there was any signal.
--- End quote ---
Not sure what was connected when I did those pastes in the first pic, but now, the external X50 gives me about +3.0db of RF Input Noise, the loft 868.3 9dbi gives me +6.0db of RF Input Noise.
Cheers
Kev
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