Teledyne Lecroy Frontline BPA 600, Hardware And Software User Manual, Page: 72 / 348

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Wi-Fi interference should be minimized or eliminated. Bluetooth shares the same 2.4 GHz frequency
bands as Wi-Fi technology. Wi-Fi interference can cause loss of packets and poor captures. In a laboratory
or testing environment do not place the DUTs and Frontline hardware in close proximity with Wi-Fi
transmitting sources such as laptops or routers. Turning off Wi-Fi on the computer running the Frontline
software is recommended.
Positioning for audio capture
The Bluetooth Audio Expert System provides analysis of audio streams and can assist in identifying problems
with capture methods including positioning and environment because it will point out missing frames. For
hands-free profile data captures both DUTs send and receive data. Therefore, position the devices following
the equilateral triangle arrangement as mentioned above.
However, in A2DP data capture scenario, the equilateral positioning of devices is not optimum because,
normally, only one device is sending data to the other. It is recommended that the Frontline hardware be
positioned closer to the device receiving data so that Frontline better mimics the receiving DUT. Position the
DUTs 1 -2 meters apart for Class 1 and 2 transmitters, and 1/2 meter apart for Class 3 transmitters.
Figure 4.2 - For Audio A2DP, Position Closer to SINK DUT
Poor Placement
A poor test configuration for the analyzer is placing the DUTs very close to each other and the analyzer far
away. The DUTs, being in close proximity to each other, reduce their transmission power and thus make it
hard for the analyzer to hear the conversation. If the analyzer is far away from DUTs, there are chances that
the analyzer may miss those frames, which could lead to failure in decryption of the data.
Obstacles in close proximity to or in between the analyzer and the DUTs can interfere and cause reduction in
signal strength or interference. Even small objects can cause signal scattering.
Chapter 4 Capturing and Analyzing Data TELEDYNE LECROY
Frontline BPA 600 Hardware & Software User Manual 64