Teledyne LeCroy Merlin II - Users Manual - Manual (Page 93)

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Merlin II Protocol Analyzer User’s Manual CATC SW Version 2.50
Additional Timeslot Filtering
By default, Merlin II records frequency hop and timestamp information for
all time slots in the Piconet under analysis, regardless of whether the time
slot contained a Bluetooth packet. This means that in instances where there
is little piconet traffic, Merlin II will display row after row of empty packets
-- each representing an empty time slot. Through the use of timeslot
filtering, these empty packets can be filtered out. Filtering out this
information has the benefit of freeing memory so that more traffic can be
recorded.
Filter Empty Slots
If "Filter Empty Slots" is checked, Merlin II will exclude all empty time
slots from a recording except for those that lie immediately in front of
Bluetooth communications packets. These remaining empty packets are
preserved to give timestamp and frequency hop reference data to the packets
that follow.
Filter Slots on Packet Filter
If filters are used to exclude FHS, DM1 or other packets, Merlin II will
exclude these packets from a trace and mark their locations with empty
packets. The result can be rows and rows of empty packets. The option
"Filter Empty Slots" will not exclude these empty slots because they lie
immediately in front of Bluetooth communications packets - even though
those packets were not recorded. To eliminate these empty packets, select
"Filter Slots on Packet Filter."
Packet Headers
Clicking "Packet Headers" opens three sets of check boxes and menus on
the right that represent fields within packet headers: Packet Type, Active
Member Address, Flow Control, Acknowledgment, and Sequence Number.