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The "SELF-ALIGNMENT" menu can be used after programming all the clusters. That way, the Profiler unit
will automatically calculate the powers of each input channel and set the values of all gains such as the initial
dynamics, the cell gain and the final gain. Therefore, the noise figure of each cluster will be optimized and the
cells' output level will be equalized automatically.
After self-alignment each gain value (dynamics of the input and gain of each cell) can be varied from the menu
"UHFx INPUTS" for the UHF inputs.
To adjust the output gain, adjust the final gain (i.e. "FINAL GAIN" menu) as given in the following paragraph.
Note:
The self-alignment algorithm does not consider the input signal given in the B.III+DAB+FM because:
•
the self-alignment must be performed when the B.III+DAB+FM input has not been connected yet becau-
se a signal given in this input may affect the measurement of the output level of the UHF signal.
•
The regulation of the gain for the III band has to be carried out as described within paragraph 5.3.2, by
considering the possible problems relevant to a too high input level (i.e. intermodulation).
Advanced programming
To perform an optimal alignment, after performing the self-alignment, proceed as follows:
1.
Check the quality of the output signal from the Profiler unit by analyzing the presence of holes or tilts in
the spectrum caused by the addition in the counterphase of the cell signals.
2.
If the previous check is unsuccessful for all the active cells, change the channel position in the various
cells or change the cell dimensions (number of channels associated to the cell).
3.
Perform the self-alignment again and check the quality of each channel (MER and S/N).
4.
Modify the value of the input dynamics and find the best compromise between the output level and the
quality of each channel.
5.4 SELF-ALIGNMENT SETTINGS MENU
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