In the online power profiler for nRF52832, when I look at the advertising (Tx/Rx) power consumption I see that if I set the Tx payload to 0 bytes the Tx time modeled is 128us. I assume this means that, with a 1M PHY, the are 128 bits = 16 bytes of overhead transmitted in an advertisement packet that is required by the protocol even if I'm not sending any payload.
However, when I looked at the BLE advertising packet format, I see that the overhead is only 1+4+2+3 = 10 bytes if I set the payload to zero. 
I am curious what is the information I am missing here that requires 6 more bytes of on-air time for Tx that I see in the OPP? Thanks!
