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AD9361 Output Signal Echo Issue

Question asked by semion_z on Feb 8, 2017
Latest reply on Feb 13, 2017 by Vinod

Hello

 

We use AD9361 with No-OS drivers configuration and We have the following problem:

 

1. When We transmit a pulse with the amplitude that is 2000, pulse width is 1 microsecond and PRI is 4 microseconds everything is ok

2. When We transmit a barker modulated pulse which has amplitude that is 2000 or -2000, pulse width is 1 microsecond and PRI is 4 microseconds, We see an echo from Tx signal on Rx channels, after 120-140 clocks

 

We use a FIR filter with gain=-6 dB.

We have tried to lower the amplitude it did not help.

Our used sample rate is 60 Msps.

 

What can be the reason for this problem?

Thanks.

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