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PicoZed SDR 2x2 TX/RX switching time

Question asked by LeroyKii on Feb 1, 2018
Latest reply on Feb 2, 2018 by travisfcollins

Hello,

 

I have implemented a TDD system using two PicoZed SDR 2x2 equipped with breakout carrier.

 

I'm experiencing a weird effect when one of them stops transmitting and start receiving.

The following figure is a capture from one of them where I highlighted TX and RX times. X Axis is time, Y Axis is 'Q' component. Vertical red lines represents slots (~15 ms duration each).

 

 

In the slots within the blue circle a signal slope component can be appreciated. I understand this could be some residual power after transmitting, but doesn't it last too long (roughly 3 slots = 45 ms)?

 

A similar one, a little zoomed in:

 

This effect is destroying the SNR of the 2 or 3 first receptions just after a transmission has taken place.

 

Regards,
~Leroy

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