Other Parts Discussed in Thread: AFE7900
Tool/software:
Hello,
We are not observing any valid test pattern on the feedback channels (FB1 and FB2) of the AFE7900. Instead of a deterministic ramp sequence, we only see seemingly random counts, which makes it difficult to perform sample alignment across all Rx channels (RxA, RxB, RxC, RxD) along with the feedback channels. The sample alignment is crucial to our application, so this issue is blocking our progress.
For Rx channels, we correctly receive the ramp test pattern, for example: 10, 11, 12, 13, 14, 15, ...
For feedback channels (FB1 and FB2), however, we get values such as: 8, 2, 0, 65532, 5, 0, 65529, 65523, ...
Could you please confirm:
Whether the feedback channels support the test pattern feature.
If yes, how can we enable it?
If not, is there an alternate method recommended for aligning feedback channels with Rx channels?
Thanks in advance for your clarification.