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I would not be at all surprised if some "test mode" allows access to the I/Q signals. Do you have any friends at TI ?
by GeorgeTirebiter 2y ago
I would not be at all surprised if some "test mode" allows access to the I/Q signals. Do you have any friends at TI ?
- hcadam 2y agoAuthor here, it’s totally possible to get IQ samples from the RX chain! Unfortunately, the design of the TX chain is in such a way that it does not work off of IQ DACs, and is more limited in what the silicon can generate.
- mikewarot 2y agoOk... we're in agreement.... no analog TX. That's some amazing detective work! Congratulations on pulling it off.
- trelliscoded 2y agoThe “CC” in the TI part numbers stands for “ChipCon”, who TI acquired for these wireless products. The CC1100, one of their earliest parts, has a documented but unsupported debug mode which dumps raw quadrature samples out some of the I/O pins. Later parts do not mention such a feature in their documentation, but it’s not proven it was removed.