ADRV9009 receiver spur without any input

are you seeing the spur only in the frequency hopping mode or in normal mode as well?

Hi RR4 ,
 
        Sorry for the delayed response. I have checked for both normal mode and frequency hopping mode, the observation is that the spur has been seen in both conditions but there is more power observed in frequency hopping mode compared to normal mode. Apart from that, in normal mode a 2089MHz spur is also observed which has higher power than 2098MHz spur.


Thanks and Regards
Goli Ganesh

Can you please terminate the Rx ports and check if you see any spur? and also please confirm what is the ADRV9009 configuration that you are using in this scenario

RR4 said:

Can you please terminate the Rx ports and check if you see any spur?

Yes, I'm seeing the spur even though terminating the RX ports 

RR4 said:

and also please confirm what is the ADRV9009 configuration that you are using in this scenario

I'm using the 200MHz bandwidth for RX, TX and ORx configuration which is available in the below link:

github.com/.../tx_bw200_ir245p76_rx_bw200_or245p76_orx_bw200_or245p76_dc245p76

are you using the no-Os setup or TES GUI for this testing

I'm using no-OS setup for testing.

can you please check by using the TES GUI and check if you are seeing the same problem.

can you please check by using the TES GUI and check if you are seeing the same problem.

RR4 said:

can you please check by using the TES GUI and check if you are seeing the same problem

with TES GUI also I observed the same problem

Do you have LNA in your setup ?

Do you have any of the  Tx enabled , can you disable all the Tx channels and unused Rx channels and see if you still see spurs ?

As you are using 200MHz profile , can you go with a 100MHz profile and test once ?

Can you try testing with a different RX LO and see if the same exact spurs are seen ?