User Manual Part 2

110
Merlin Protocol Analyzer User’s ManualCATC Version 1.6
Member Address). If possible, select an address other than
the currently displayed address.
The connections for the ’new’ device should now display.
10.8 Viewing Protocol Messages and Transactions
By pressing a button such as or , you can cause Merlin to decode the
higher level protocol data contained within L2CAP messages and display
them as packet-like rows called Protocol Messages. Protocol Messages
have headers marked "protocol" and fields that vary in appearance and
content depending on the type of protocol.
Some Protocol Messages can be grouped into a higher level entity called a
Protocol Transaction. A Protocol Transaction is a row in a trace that
summarizes the higher level protocol data that is transmitted between a
Master and Slave device when one sends a request and the other sends back
a response. For example, if you press , Merlin will locate SDP requests
and responses between a Master and Slave device summarize their data.
Viewing L2CAP Messages in Protocol Messages
If the protocol heading is double-clicked, the L2CAP data-transfer
messages that make up the protocol will display below the protocol. You
can also expand the protocol by left-clicking the small downward pointing
arrow on the protocol header.
How to Decode
Decoding Protocol messages is the same process as decoding LMP and
L2CAP messages.
Using the Toolbar - To decode using the Toolbar, press one of the protocol
decode buttons such as: . .
Using the Menu - To decode using the menu, select:
Setup>Display Options
Then select one of the decode checkboxes.
Once a decode command has been issued, Merlin will create Protocol
Messages in the trace. You will probably have to hide hops, polls, and null
packets and then scroll through the trace in order to find Protocol messages.