User manual

Icon Name Description
Zoom In Horizontially Expands the data horizontally so it can
be easier to read.
Zoom Out Horizontally Squeezes the data together so that more
fits on one page.
Zoom In Vertically Expands the data vertically so it can be
easier to read.
Zoom Out Vertically Squeezes the data so that more fits on
one page.
Current Page
The current page text box displays the
page number this is currently shown in
the dialog.
You can enter a number in the text box,
then press Enter, and the dialog will
display the data for that page.
Page navigation
If the data requires multiple pages, the
navigation buttons will take you to:
l The first page
l The previous page
l The next page
l The last page
Close Print Preview Closes the dialog and returns to the
Message Sequence Chart
Select Font Size Allows selection of the print font size
from the drop-down control.
Table 4.11 - Print Preview Icons (Continued)
4.4 Packet Error Rate Statistics
The Packet Error Rate (PER) Stats view provides a dynamic graphical representation of the Packet Error Rate for
each channel. The dialog displays a graph for each Classic Bluetooth channel numbered 0 through 78 and for each
Bluetooth low energy channel numbered 0 through 39.
Packet Error Rate Stats assist in detecting bad communication connections. When a high percentage of re-
transmits, and/or header/payload errors occur, careful analysis of the statistics indicate whether the two devices
under test are experiencing trouble communicating, or the packet sniffer is having difficulty listening.
Generally, if the statistics display either a large number of re-transmits with few errors or an equal number of
errors and re-transmits, then the two devices are not communicating clearly. However, if the statistics display a
large number of errors and a small number of re-transmits, then the packet sniffer is not receiving the
transmissions clearly.
Chapter 4 Capturing and Analyzing Data TELEDYNE LECROY
Frontline BPA low energy Hardware & Software User Manual 139