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Software-Defined Radio (SDR) is a radio communication system that replaces traditional hardware components such as filters, amplifiers, and mixers with software-based functionality. SDR dongles can capture live radio signals and transmit them digitally as raw Inphase and Quadrature (I/Q) components to software applications like TXAdvance. This allows for various operations to be performed on the signals within the software.

To ensure compatibility with TXAdvance, it is necessary to use a compatible SDR receiver. Currently 3 models can be used with TXAdvance: the RTL-SDR*, the Airspy Mini and the HackRF One.

Comparing the different SDR:

RTL-SDR*Airspy miniHackRF One
Re-tunning step
(Scan & loop modes)
1 MHz2 MHz4 MHz
Frequency tunning
speed
SlowFastFast
Live check bandwidth
(Real time analyzer)
2 MHz4 MHz8 MHz
DriverSignalware SDR driverCompasseur SDR BridgeCompasseur SDR Bridge
SizeSmallSmallBig
Minimum Android
version
Android 6Android 10Android 10
Link**RTL-SDR Blog
Nooelec NESDR SMArt v5
Airspy MiniNooelec HackRF One

To perform a scan on TXAdvance, you will require the following hardware:

  • An Android device with a minimum of Android 6 (RTL-SDR) or Android 10 (Airspy mini and HackRF One) operating system and OTG (On-The-Go) compatibility.
  • An SDR USB dongle (RTL-SDR, Airspy mini, HackRF One).
  • An OTG adapter cable to connect the SDR USB dongle to your Android device, such as this model.**
  • A compatible antenna for capturing RF signals.

Ensure that you have all of these components to effectively utilize the scanning capabilities of TXAdvance.

* The RTL-SDR much use the RTL2832U chipset and R820T / R820T2 / R860 tuner. It is highly recommended to obtain a model with a Temperature-Compensated Crystal Oscillator (TCXO). These models are widely available and can be easily found in amateur radio shops or online marketplaces such as Amazon.
**Some of the links are affiliate links to recommended hardware for use with TXAdvance. If you make a purchase on Amazon using one of these links, you will pay the same price as you would normally find on Amazon. However, a small percentage will be allocated to Compasseur as a referral fee for directing you to Amazon.