Manual

Final Tuning
bcant-an-001Pa
© Copyright CSR 2003
This material is subject to CSR’s non-disclosure agreement.
Page 11 of 14
BlueCore
™
Inverted-F and Meander Line Antennas
Figure 8.2: Final Tuning Procedure
Connect omni directional receive
antenna to a spectrum analyser
Place fully assembled Bluetooth product
approximately 2m away from receive antenna
Put Bluetooth product into continuous transmit
Watch power level of received signal on the specturm analyser while
moving receive antenna ±10cm in each of x,y,z planes to ensure it is not
located in a null point. A sudden dip in received power indicates a null point
Is antenna located in
a null point?
Rotate Bluetooth product around in the x,y,z planes until the maximum
power level is observed on the spectrum analyser. This ensures that
the dominant polarisation mode of the antenna is measured.
Has the maximum possible
power level been observed on
the spectrum analyser?
Record power level observed
on the spectrum analyser.
Turn off Bluetooth product, disassemble it
and make adjustments to length of antenna,
feed point or matching components
Reassemble Bluetooth product and place it in
the same location and orientation as before
End of procedure
No
Yes
Yes
Repeat process on multiple devices
to ensure results are repeatable
Yes
No
Has the maximum receive
power been obtained?
No