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AFE7920: Unwanted spurious signal inside 3.5G receive path

Prodigy 30 points

Replies: 5

Views: 96

Part Number: AFE7920


We're struggling with an unwanted spurious signal inside the 3.5GHz Rx path. Several tests have shown that the spurious signal is related to the JESD output rates (92.16M) in the receive chain.

The evaluation board was made by ourselves to check the AFE7920's performance. Other bands including 1.8G and 2.1G work well.

Chip initialization & handling has been done by Latte, or Firmware using API CAFE2p4.

If anyone has a similar experience or solution, could you let us know?