Adaptive Frequency Hopping (Option 15) AFH Test Configuration
MT8852B Operation Manual PN: 13000-00205 Rev. N 15-5
15-5 AFH Test Configuration
1. Press > "MT8852B" > “AFH Measurements".
2. Press to display the page shown below.
3. If the MT8852B is not already in an ACL connection with the EUT, a connection must
now be established. Select the required EUT address source then select "ACL Status"
and press .
4. As mentioned in the previous section, the channel map is compiled from information
from the MT8852B pseudo local assessment map and the EUT's local assessment
scheme. Use of the latter is controlled by setting "EUT Reporting" to "On" or "Off". If
set to "On", the EUT's local assessment scheme is used, and the rate at which the
assessment is transmitted to the MT8852B is controlled by the setting at "EUT Rep.
Rate". Enter a rate of between 1 and 30 seconds.
5. Select "TX Level" and enter the power level at which the MT8852B will transmit all
packets whilst in AFH mode.
15-6 Assessing AFH
Channel Use vs Time
Using this method the user can either edit the MT8852B's pseudo local assessment to
simulate interference by blocking specific channels, or turn on an interference source and
monitor the channels that are blocked automatically. The performance of the EUT can then
be validated using the EUT's support software and the graph of channel use over time
displayed by the MT8852B.
1. Configure the MT8852B as detailed earlier in this chapter.
Figure 15-5. AFH Measurement Setup
Note
The Bluetooth specification does not define how an EUT shall determine if a
channel should be assessed as good or bad. Each chipset developer has
implemented a unique channel assessment solution. The MT8852B displays the
channel assessment map that a specific EUT has reported as a result of the
continuous Poll/Null connection that exists between the MT8852B and the EUT.
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