The SDR-play RSP1A is a major upgrade to the popular RSP1 and is a powerful wideband full featured 14-bit SDR which covers the RF spectrum from 1 kHz to 2 GHz. 

Due to its exceptional combination of performance and price, the RSP1 has proved to be a very popular choice as an “entry level” SDR receiver. Since launching the RSP1, we have learned a great deal about what people are looking for in SDR receivers, and where possible, we have incorporated these improvements and new features into the RSP1A. 

The RSP1A therefore delivers a significant number of additional features which result in benefits to amateur radio enthusiasts as well as significant benefits for the scientific, educational and industrial SDR community.

Here are the main additional features of the RSP1A compared to the original RSP1:

  • ADC resolution increased to 14-bit native for sample rates below 6 MHz, increasing to 16 bits with decimation.
  • Enhanced RF pre-selection (greater filter selectivity plus 4 additional sub-bands compared to the original RSP1) for reduced levels of spurious responses
  • Improved LNA architecture with variable gain. The RSP1 had just a single gain step.
  • Improved intermodulation performance
  • Performance extended to cover 1kHz to 2 GHz with a single antenna port.
  • Bias-T facility
  • Improved frequency stability incorporating a 0.5ppm TCXO (software trimmable to 0.01ppm)
  • Selectable broadcast AM/FM/DAB notch filters
  • RF shielding within the robust plastic casing

When used together SDRplay’s own SDRuno software, the RSP1A becomes a high performance SDR platform. The benefits of using the RSP1A with SDRuno include:

  • Highly integrated native support for the RSP1A
  • Calibrated RF Power Meter with more than 100 dB of usable range
  • Calibrated S-Meter including support for IARU S-Meter Standard
  • The ability to save power (dBm) and SNR (dB) measurements over time, to a CSV file for future analysis
  • The IQ output wav files can be accessed for 3rd party applications

SDRplay has also worked with developers of the popular HDSDR, SDR-Console and Cubic SDR software packages to ensure compatibility. As with the RSP1, SDRplay provides multiplatform driver and API support which includes Windows, Linux, Mac, Android and Raspberry Pi 3. There is even a downloadable SD card image available for Raspberry Pi3 which includes Cubic SDR. 

Radio Spectrum Processor 1A 14 bit SDR

The SDR-play RSP1A is a major upgrade to the popular RSP1—it is a powerful wideband full featured 14 bit SDR which covers the RF spectrum from 1 kHz to 2 GHz. All it needs is a PC and an antenna to provide excellent communications receiver functionality. Combined with the power of readily available SDR receiver software (including ‘SDRuno’ supplied by SDRplay) you can monitor up to 10 MHz of spectrum at a time. Documented API allows developers to create new demodulators or applications around the platform. 


  • Covers all frequencies from 1 kHz through LF, MW, HF, VHF, UHF and L-band
  • Excellent dynamic range for challenging reception conditions
  • Low levels of spurious responses
  • Works with all the popular SDR software (including HDSDR, SDR Console, Cubic SDR and SDRuno)
  • ExtIO based plugin available
  • Software upgradeable for future standards
  • Strong and growing software support network
  • API provided to allow demodulator or application development
  • Multiplatform driver and API support including Windows, Linux, Mac, Android and Raspberry Pi 2/3
  • Up to 16 individual receivers in any 10MHz slice of spectrum using SDRuno
  • Calibrated S meter and power measurements with SDRuno
  • Ideal for monitoring of ISM/ IoT/ Telemetry bands <2 GHz
  • Ideal for portable operation


  • Continuous coverage from 1 kHz to 2 GHz
  • Up to 10 MHz visible bandwidth
  • Powers over the USB cable with a simple type B socket
  • 14-bit ADC silicon technology (not another 8 bit dongle!)
  • 11 high-selectivity, built in front-end preselection filters
  • Software selectable AM/FM and DAB broadcast band notch filters
  • Software selectable multi-level Low Noise Preamplifier
  • Bias -T power supply for powering antenna-mounted LNA
  • RF shielding layer inside case
  • SDRuno—World Class SDR software
  • Documented API for new apps development
  • Single SMA antenna socket covering entire frequency range



  • Weight 110g
  • Size: 95mm x 80mm x 30mm
  • Low Current: 120 – 175 mA (excl bias T)


  • Single 50 Ohm RF connector (SMA)
  • USB 2.0 (high speed) type B socket

Frequency Range

  • Continuous coverage 1kHz – 2GHz
  • Frequency Tolerance: 0.5ppm (max)
  • ADC Characteristics
    • Sample frequency 2 – 10.66MSPS
    • 14 bit native ADC (2 – 6.048MSPS)
      • 12 bit (6.048- 8.064 MSPS)
      • 10 bit (8.064- 9.216MSPS)
      • 8 bit (> 9.216 MSPS )
    Bias T
    • Software Selectable 4.7V @ 100mA
    • High Stability 0.5PPM TCXO
    • In-field trimmable to 0.01ppm.
    Maximum recommended input power
    • 0dBm continuous, 10dBm for short periods
    Typical Noise Figures
    • 14dB @ 3MHz
    • 14dB @ 10MHz
    • 14dB @ 20MHz
    • 14dB @ 40MHz
    • 3.3dB @ 100MHz
    • 3.3dB @ 200MHz
    • 6.0dB @ 330MHz
    • 4.0dB @ 600MHz
    • 5.0dB @ 1500MHz
    • 6.0dB @ 1800MHz
    IF Modes
    • Zero IF, All IF bandwidths
    • Low IF, IF bandwidths . 1.536MHz
    IF Bandwidths (3dB)
    • 200kHz
    • 300kHz
    • 600kHz
    • 1.536MHz
    • 5.0 MHz
    • 6.0 MHz
    • 7.0 MHz
    • 8.0 MHz

    Front End Filtering:

    Automatically configured front end filtering 

    Low Pass
    • 2MHz
    Band Pass
    • 2-12MHz
    • 12-30MHz
    • 30-60MHz
    • 60-120MHz
    • 120-250MHz
    • 250-300MHz
    • 300-380MHz
    • 380-420 MHz
    • 420-1000MHz
    High Pass
    • 1000MHz
    Notch Filters
    • FM Filter: 50dB 85 – 100MHz
    • MW Filter: >30dB 660 – 1550 kHz
    • DAB Filter: >30dB 165 – 230 MHz

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