Getting Started

Pluto has a USB connector for additional power - use it!


Use the lower bandwidths lower USB throughput  less receive and transmit interruptions!




USB Noise

Beware: as supplied the development PLUTO generated an unholy amount of noise across the HF spectrum. A short USB cable wrapped around a high quality ferrite core reduced this noise.

So the rule for PLUTO is the same as for all USB SDRs - use a high quality cable, if you still have noise then get a ferrite!


Customising LO

There are various modifications you can make to a Pluto to improve the local oscillator stability:

  • A better temperature compensated crystal oscillator (TXCO), or
  • Using an external reference.

If you make a modification and Pluto does not have a valid or functioning local oscillator (LO) then detection will fail, the AD9361 will not be found.

So - if you modify your Pluto to use an external reference then connect and enable this reference before using with SDR Console.





In Action

FM Stereo

Here's a screenshot of a 'hacked' Pluto - the frequency range has been extended to 70 MHz to 6 GHz using the instructions on this page [link].

It's not quite as good as an Airspy but still very acceptable. The antenna is an 8 element yagi, so probably providing too much input, also picking up two very stong 2.4 GHz Wi-Fi signals.


Es'Hail 2

Amd here's a screenshot of Pluto receiving Es'Hail 2, also known as QO-100. Note the RX Gain is set to Slow Attack (Manual value is ignored) and the Visual is set to -40dB.