User`s guide

Protocol Analyzer
Building a Filter
5967–9446 375
Figure 79 Example: Using a Pattern and Mask
… xx xx xx xx xx 79 xx xx xx xx xx …
0 1 1 1 1 0 01
0 0 0 0 1 1 11
0 0 0 0 1 0 01
and
pattern match is
successful
byte at offset 10,
represented as bits
mask value (0F),
represented as bits
result after applying
mask
This pattern/mask
lets you match the
second half of the byte
at offset 10 with the
hex pattern value 9.
=
09
packet to test,
represented as hex
bytes
… xx xx xx xx xx 09 xx xx xx xx xx …