Tagged: two tone test

ADALM-Pluto 2-tone Test at 144 MHz

Over on his YouTube channel Adam 9A4QV has been testing his ADALM-PLUTO SDR in the 2M ham band at around 144 MHz. In one of his videos he shows a 2-tone test. A 2-tone test is used to determine how well an SDR can handle two strong narrowband signals at once, without causing intermodulation and imaging problems. The two tones in his video occur with real world signals on the 2M band when two amateur radio operators are transmitting strong signals at the same time.

The video shows that the Pluto SDR has some intermodulation problems occurring when the two strong signals transmit at once. No problems are noticed when only one signal transmits.

Problems like this with the PlutoSDR may be expected as it was never designed to be a high performance receiver, but rather a tool for learning and experimentation. But it is still possible to use it as a more general purpose receiver if you are aware of the limitations.

ADALM-PLUTO 2-tone test 144MHz