Teledyne LeCroy BTTracer_Trainer - BTTracer Users Manual - Manual (Page 101)

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BTTracer Protocol Analyzer User’s Manual CATC SW Version 2.20
6.6 Recording Options - HCI
The HCI property page lets you include/exclude HCI traffic from the
BTTrainer or Implementations Under Test (IUTs) into the trace. HCI traffic
consists of commands and data that are sent from the host to the controller
and events and data sent from the host to the controller. By default, this
option is disabled - meaning that HCI traffic is not shown in the trace.
These settings are relevant only for BTTrainer mode, where the BTTracer
is monitoring the BTTrainer. The Internal HCI traffic of BTTrainer can also
be recorded.
HCI Trace
Using the analyzer's hardware and radio module, the BTTracer can record
serial Bluetooth HCI traffic from Bluetooth devices, or "IUTs"
(Implementations under test).
While the off-the-air traffic and HCI traffic from BTTrainer™ (if active) are
captured by the analyzers hardware, the HCI Traffic from the IUTs is
captured by the analyzer application using an HCI probe (provided by
CATC) that is connected directly to the IUT hardware. In a typical setup, the
HCI commands and data to transmit are passed from the Bluetooth
application to the Bluetooth baseband (Host to Controller), while events and
data that was received are passed from the Bluetooth baseband to the
Bluetooth application (Controller to Host).