Tektronix BPA105, Руководство пользователя

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Acquiring Piconet Packet Data
BPA105 Bluetooth Protocol Analyzer User Manual -- COMPANY CONFIDENTIAL
1/2001
1- 13
Specify the piconet search criteria:
H
Normal Hopping. Specify the hopping pattern for the geographical area you
want (Europe/USA, France, Spain or Japan).
H
Rx/Tx on single-frequency. Specify the desired frequency (from 2402 MHz
to 2480 MHz). This mode is useful for testing and debugging.
NOTE
. To meet FCC regulations, the transmit power is reduced from 20 dBm to
0 dBm when operating in the single-frequency mode.
Specify the piconet synchronization parameters:
H
Correlation. This value sets the number of bits in the synchronization word
of each received packet that must be matched for the packet to be valid.
Normally, the radio uses 54 to 64 bits correlation. The default value is 54.
The value can range from 40 to 64.
H
Resync. This value sets the drift in parts per million. If synchronization is
lost during connection, for example when the link enters Park, Sniff or Hold
mode, you can enter the drift in PPM. Instead of the normal limit of
250 PPM that a device may drift in Park, Sniff or Hold mode, the user can
force the Bluetooth Protocol Analyzer not to use “window search” by setting
the resync drift to 40 PPM (default). This is useful if you know that the
device has negligible drift and helps ensure that no packets are lost because
of the window search.
You can turn data whitening on or off. By default, this function is on, which is
normal operation for Bluetooth devices. Data whitening encrypts all data packets
that are sent between Bluetooth devices on a piconet to remove DC bias in the
transmitted data. However, for test purposes, you can turn off data whitening. In
this test situation all devices must have whitening turned off, or you will get
scrambled data.
Specify where to send the data output from your logging session:
H
Log file. Send the output to a log file on the PC hard disk. You can open the
file and analyze the data later. See
Understanding the Data Analysis Window
on page 1--28 for additional information.
H
Free run display. Send the data directly to the List view field in the
Acquisition Window to continuously monitor the latest session transactions
with real-time screen updates.
In both cases, stop the acquisition and save the data to a file for later analysis.
Hopping Mode
Advanced Settings
Data Whitening
Output