Pluto xmit used as LO for mixer ??

[tim_rtd]

Any concepts out there where as the xmit side of plutosdr is used as the LO for a mixer to rcv > 6ghz ?

[tim_rtd]

Just fyi, I have successfully used a MiniCircuits ZX05-153 mixer using the Plutosdr xmitter output set to 6 Ghz to act as the LO and on the test bench synthesizer have viewed 10.98ghz signal on SDR#. I used the iio-oscilloscope app to program up the 6GHZ xmit signal.

[rtlsdrblog]

Nice, yep I see no reason why it wouldn't work. Just not sure on the quality of the LO output, e.g. phase noise

[snn47]

I had also asked if the suppression of spurious emissions were meassured, when a signal is generated, but there was unfortunately no reply.

[snn47]

Maybee an alternative "35-4400 MHz with a new ADF4351 board"

https://translate.google.de/translate?h ... 51_neu.htm

Like for the Pluto SDR I could not find information on suppression of spurious emissions

[9a4qv]

Just fyi, I have successfully used a MiniCircuits ZX05-153 mixer using the Plutosdr xmitter output set to 6 Ghz to act as the LO and on the test bench synthesizer have viewed 10.98ghz signal on SDR#. I used the iio-oscilloscope app to program up the 6GHZ xmit signal.

Can you explain how did you do it please?
I measured the Pluto TX side and the maximum power is - 53dBm or so.
The mixer you used is level 7 mixer (requiring +7dBm) of LO to operate properly.

By the way, I do have such a converter done with the LNA at the input, mixer and the amplifier for the LO but still the Pluto TX level is too low.

thanks
Adam

[9a4qv]

Just to update the findings, thanks to Tim I manage to get the full power ADALM can deliver and it is possible to use the ADALM TX port for the downconverter LO.

thanks guys,
Adam