PDU Whitening (Bluetooth)

Default: Cleared

PDU (protocol data unit) The data unit exchanged between peer entities of the same protocol layer. On the downward direction, it is the data unit generated for the next lower layer. On the upward direction, it is the data unit received from the previous lower layer. Whitening tells the demodulator whether the PDU of the transmitted packet is whitened (scrambled) as described in the Bluetooth Core Specification, Vol 6, Part B, §3.2. When selected, the demodulator de-whitens the payload before comparing it against the expected Payload Pattern and reporting the Demod Bits trace.

This parameter is not shown when the Bluetooth Mode Packet Type is LE Test — direct test mode packets are never whitened (Core Specification, Vol 6, Part F, §4.1.1), so the setting does not apply.

Under a Packet Type of Auto, this setting applies to any burst detected as an advertising or data packet, exactly as it would if you declared that packet type. A burst detected as an LE Test packet is decoded unwhitened regardless of this setting.