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ADRV9009 receiver spur without any input

Category: Software
Product Number: FMCOMMS8_ZCU102
Software Version: Vivado 2021.2

Hi Team,


               I am using FMCOMMS8_ZCU102 setup. I tuned LO to 1999MHz using Frequency Hopping Mode. Without providing input frequency, I have plotted the receiver noise of FMCOMMS8 and observed a spur at 2098MHz with power 10 dB above noise floor in receiver 2 (RX2) and receiver 4(RX4) only. While in RX1 and RX3 , this 2098MHz peak was not there. In my application I'm taking four receivers output , so that without any input, i'm a observing a peak at output. This is scenario is not acceptable in our application. Can you please guide us how to resolve this issue in channel 2and channel 4.

Here I'm attaching the results for your reference:

Noise Plot without any input:
channel 2

channel 1

With Input frequency 2064MHz

channel 1

channel 2


Thanks & Regards

Goli Ganesh

Parents Reply
  • Hi  ,
            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