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@ -35,14 +35,14 @@ Can be used in two modes:
# Test Results
![alt text](images/setup.png)
- Antennas
- Client - rubber duck antenna or mobile antenna on a car roof
- Server - UHF yagi indoors
- Range (20 KHz channel width and 11 spreading factor)
- Client: rubber duck antenna or mobile antenna on a car roof
- Server: 7 element UHF yagi indoors
- Range (20 KHz channel width and 11 spreading factor, also got similar results with 125 kHz and 12 SF)
- **About 4 km** when server is 30m above the ground and client is 2m above the ground with rubber duck antenna
- **About 13 km** when server is 30m above the ground and client is at some higher point ~40m above the ground with rubber duck antenna
- **About 17km** maximum (non-reliable) between base and mobile station with antenna on the car roof
- Signal levels
- Successful decodes down to **-17.5dB** below the noise floor when using compressed APRS coordinates (smaller packets, about 50 bytes), see https://github.com/ge0rg/aprsdroid/issues/170 for APRSDroid version with compressed coordinates support
- Polarization
- Using horizontal polarization improves successful decoding probability in the city environment
- Using horizontal polarization improves successful decoding probability and receiving range in the city