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CC1050 Phantom Data

Other Parts Discussed in Thread: CC1101, CC1050


We are seeing a phantom byte being received by our CC1101. It appears just after our CC1050 powers up but before we sent out our 8 bytes of data. We have no idea where it is coming from, it almost seems like there is a byte of data stuck in the CC1050's UART that gets shited out during power up.

Any thought?

Here is my setup:

CC1050 Transmitter
915MHz Carrier
Asynchronous, UART
32KHz Deviation
76.8k Baud Rate
Data: 8 Bytes, 6ms transmit "on" time
1byte for header, 1 byte for footer (used for decoding signal from noise)

CC1101 Receiver
32KHz Deviation
76.8k Baud Rate

This is a battery operated transmitter, current consumption is key.
I can't use synchronous mode.