Awesome
UAT (ADS-B 978) test signal generator
Disclaimer
This low power UAT test source is designed for a lab or an aircraft hangar use only.
Legitimate use
Radio being used in the project is rated for 14 dBm (25 mW) of maximum transmit power.<br> FCC compliant built-in RF filter reduces the power even more, down to approximately 1 mW on the reference frequency.<br> This power is sufficient to cover an area of just only few meters around the transmitter.<br>
Hardware
Variant 1. Basic.
TI SimpleLink CC1310 LaunchPad kit (915 MHz)
<br> <img src="https://www.ti.com/diagrams/launchxl-cc1310_launchxl-cc1310-angled_(1).jpg"> <br>Variant 2. Advanced.
<br><img src="https://github.com/lyusupov/SoftRF/raw/master/documents/images/SoftRF-UAT-1.jpg" height="262" width="400"><br> <br> <img src="https://github.com/lyusupov/SoftRF/raw/master/documents/images/SoftRF-UAT-2.jpg" height="199" width="400"><br>
Schematics of the adapter and Gerber files of the PCB will be published soon after I'll receive the PCB samples<br> and will make sure that the design has no any critical issues.
Bill of materials
Number | Part | Qty | Picture | Source |
---|---|---|---|---|
1 | PCB | 1 | <img src="https://github.com/lyusupov/UAT-test-signal/raw/master/notes/pics/SoftRF-UAT-PCB.jpg" height="388" width="300"> | TBD <!-- <a href="https://PCBs.io/share/rYeN0"><img src="https://s3.amazonaws.com/pcbs.io/share.png" alt="Order from PCBs.io"></img></a> --> |
2 | Ebyte E70-915T14S<br>RF module | 1 | ![]() | AliExpress |
3 | Female SMA-KHD | 1 | <img src="https://github.com/lyusupov/SoftRF/raw/master/documents/images/bom/sma-khd.jpg" height="300" width="300"> | AliExpress |
4 | 2x7 female header 2.54mm | 1 | ![]() | Local |
5 | 1x40 male header 2.54mm | 2 | <img src="https://github.com/lyusupov/SoftRF/blob/master/documents/images/bom/m40.jpg" height="283" width="200"> | AliExpress |
6 | XDS110 cJTAG debug tool (clone) | 1 | <img src="https://github.com/lyusupov/UAT-test-signal/raw/master/notes/pics/XDS110_clone.jpg" height="300" width="221"> | AliExpress |
7 | 40 pcs. female DuPont jumper wires | 1 | <img src="https://github.com/lyusupov/SoftRF/blob/master/documents/images/bom/40DuPont.jpg" height="237" width="300"> | AliExpress |
Firmware
Build instructions
- either:
- download this CCS project from GitHub, then upload it into your TI CCS Cloud IDE, or ;
- if you have a GitHub account: "fork" this project into your GitHub space, then import directly into TI CCS Cloud IDE.
- build, then run the firmware on your CC1310 hardware with assistance of TI Cloud Agent and TI Cloud Agent Bridge plug-in for Google Chrome browser.
Validation
Raw data
pi@raspberrypi:/run/tmp/dump978-master $ rtl_sdr -f 915000000 -s 2083334 -g 8 - | ./dump978
Found 1 device(s):
0: Generic, RTL2832U, SN: 77771111153705700
Using device 0: Generic RTL2832U
Found Rafael Micro R820T tuner
Exact sample rate is: 2083334.141630 Hz
[R82XX] PLL not locked!
Sampling at 2083334 S/s.
Tuned to 915000000 Hz.
Tuner gain set to 7.70 dB.
Reading samples in async mode...
-0d1abba154d8ec198ba602f0800000000074c28d855bfd0b4aa5c2a0000000000000;
...
Text
pi@raspberrypi:/run/tmp/dump978-master $ rtl_sdr -f 915000000 -s 2083334 -g 8 - | ./dump978 | ./uat2text
Found 1 device(s):
0: Generic, RTL2832U, SN: 77771111153705700
Using device 0: Generic RTL2832U
Found Rafael Micro R820T tuner
Exact sample rate is: 2083334.141630 Hz
[R82XX] PLL not locked!
Sampling at 2083334 S/s.
Tuned to 915000000 Hz.
Tuner gain set to 7.70 dB.
Reading samples in async mode...
HDR:
MDB Type: 1
Address: 1ABBA1 (Fixed ADS-B Beacon Address)
SV:
NIC: 0
Latitude: +59.6583
Longitude: +17.9617
Altitude: 150 ft (barometric)
Dimensions: 15.0m L x 11.5m W
UTC coupling: no
TIS-B site ID: 0
MS:
Emitter category: Service vehicle
Callsign: RAMPTEST
Emergency status: No emergency
UAT version: 2
SIL: 3
Transmit MSO: 18
NACp: 10
NACv: 2
NICbaro: 1
Capabilities: CDTI ACAS
Active modes:
Target track type: true heading
AUXSV:
Sec. altitude: unavailable
...
Map
pi@raspberrypi:/run/tmp $ rtl_sdr -f 915000000 -s 2083334 -g 8 - | ./dump978-master/dump978 | ./dump978-master/uat2json /run/tmp/dump1090-master/public_html/data/
Found 1 device(s):
0: Generic, RTL2832U, SN: 77771111153705700
Using device 0: Generic RTL2832U
Found Rafael Micro R820T tuner
Exact sample rate is: 2083334.141630 Hz
[R82XX] PLL not locked!
Sampling at 2083334 S/s.
Tuned to 915000000 Hz.
Tuner gain set to 7.70 dB.
Reading samples in async mode...
...
<img src="https://github.com/lyusupov/UAT-test-signal/raw/master/notes/pics/dump978.jpg" height="418" width="674">
<br>
ADS-B receiver
<br>
Signal
IQ file (WAV).<br> Taken at base frequency: 977 MHz . Sampling rate: 8.333 MSps.
Data customization
- Execute UATEncoder.py script with
<CallSign>
<ICAO>
<Latitude>
<Longitude>
<Altitude>
arguments:
$ python UATEncoder.py RAMPTEST 0x1ABBA1 59.6583 17.9617 137.8
#define UAT_DATA "0d1abba154d8ec198ba602f0800000000074c28d855bfd0b4aa5c2a0000000000000"
- Edit UAT_data.h file:
#ifndef UAT_DATA
#define UAT_DATA "0d1abba154d8ec198ba602f0800000000074c28d855bfd0b4aa5c2a0000000000000"
#endif
- Build your custom firmware and download it into your signal generator hardware.