Synchronization between the TX and the RX signals.

The stock Pluto software and HDL provide no synchronization between the RX and TX data streams. Relative delay will be random of captured data to the transmitted data. It will change as well if you are overflowing/underflowing across buffer collections.

-Travis

what abut the synchronization measures like the TDD mechanism, can't I use those, how do I control that, will that work, in a example flow graph I could see TDD control Block in GNU radio, but I think that has been depreciated now.

IonutP  can you comment?

Are there any tested modifications to the hdl code that I can perform which will enable the tdd.

Hi,

At system level, we do not have an example for Pluto only to be synchronized by the TDD engine.

However, the ADALM-PHASER uses Pluto and additional hardware to implement phased array radar applications, some using the TDD engine built in Pluto for synchronization.

TDD Engine: Generic Time-Division Duplexing Controller [Analog Devices Wiki]

HDL commit which includes the TDD in Pluto: pluto: Enable phaser integration · analogdevicesinc/hdl@455bfbc (github.com)

Video detailing FMCW chirp synchronization using the TDD: Drone Tracking Radar: Part 4 Chirp Synchronization (youtube.com)

Starting from the above example, you can extend the TDD functionality to work for Pluto.

Regards,

Ionut

Hi,

Pluto firmware version 0.38 has the TDD engine integrated in Pluto. Please also consult the above references.

Ionut

I read some papers and saw that some people have used an external syncing pulse from arduino to sync the tx and thr rx parts. How is that done?

I saw this post regarding tdd control enable is there any way that I can enable TDD from the python code itself using the method below. I followed the steps given in the post.

ez.analog.com/.../enabling-pluto-tdd-mode-in-python

This goes beyond the scope of the forum. We can answer questions about our reference designs. We do not have such an example.

Ionut

Can I use the method specified here to enable tdd mode

wiki.analog.com/.../power_amp