Can you anyone help me , I have the following questions on LImeSDR operation?

  1. Is it possible to configure and use all the 4 Tx in limesdr simultaneously?

  2. How can two or more Lime SDRs can be synchronised?

  1. There are only 2 Tx. It’s possible to configure the two simultaneously.
  2. This is only possible with v1.4 boards. You need to connect them together in series (I believe) with the CLK IN and OUT ports. After that, you will need to set one of them as the base clock and all the others as external clock.

Thanks Filipe,
how can I set the amplitude and phase of the two transmitters using Octave or Lime SDR and run simultaneously?

I don’t know. I haven’t got my limesdr yet (ships in 9 days). Perhaps someone else can answer this.