A coworker and I have been looking at the behavior of the CC2420 radio
chip when sending packets at different power levels, and we have a
question about how it handles sending hardware ACK packets in this
situation.
What we're unclear about is whether the CC2420 chip uses the PA_LEVEL
register to determine the power level of hardware-generated ACK packets.
Basically, we're concerned that if we're adjusting the radio power on
a per-link or per-packet basis, that the power setting of our last
transmitted packet will persist to any subsequent ACKs. (e.g., node A
sends a packet to node B at power level 7, then receives a packet from C
-- will A send the ACK back to C at power level 7?)
I've looked through the CC2420 datasheet and haven't been able to find
an explicit answer. Is our understanding of its behavior correct?
Thanks,
Greg Hackmann
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