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2.4. Power Transistors Againg Adjust
We recommend that the first polarization adjustment of the power drawer's transistors occurs after the 6
month of operation and then annually from then on. This review will compensate for the variation in
performance due to the aging of the device.
Perform the adjustment on the VGS voltage periodically. The transistor gain at its operating point on the
saturation curve does not change, it maintains the nominal power with the same original ALC voltage and
also maintains the original MER without the need to perform pre-correction.
This parameter is configured at the factory and should only be handled by a qualified
technician and equipped with the appropriate test and measurement equipment.
Improper modification can cause serious damage to the Equipment.
Access the "22/24 [1M00] Setup Menu / Transistor Aging Adjustment:":
Press <ENTER>.
The following warning appears:
Select "YES" and press <ENTER>.
The Bias values adjusts automatically and the equipment power reduces to 0 (zero).
When updating the transistors Bias values, the equipment reduces the power to ZERO.
It only returns to the operating power manually, that is, when it is necessary to
reprogram the operating power value in the item "Program" of the menu: "Setup Menu
/ Power Setup".
Access the "01/24 [1100] Setup Menu / Power Setup" and program the transmitter to the rated power.
.
Power value
E-Compact MP-BB3 Series
105 | 108
th
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