RVR PJ500M-C Manual Del Usuario página 78

PJ500M-C
TR3 - Offset current measurement RF module 1
TR4 - Offset current measurement RF module 2
TR1 - Current measurement full scale adjust RF module 1
TR2 - Current measurement full scale adjust RF module 2
TR5 - (Ch.5) Bias card built-in limiter adjust
Notes:
TR1, TR2, TR3, and TR4 are not supposed to be user-adjustable components.
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They should only be adjusted by skilled personnel for maintenance.
TR3 and TR4 are used to adjust the offset of the measurement of the current, that
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is the value measured when I=0. Adjust the trimmers so that the voltages on test
points I1 and I2 on JP1 are 0V.
• TR1 and TR2 are used to adjust the full scale of the measurement of the current,
that is the value measured when I=10.5A. Adjust the trimmers so that the voltages
on test points I1 and I2 on JP1 are 4.0V.
TR5 adjusts the power limiting built-in in the bias card. It is factory adjusted ad
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560W. To change it, turn the "PWR ADJ." trimmer on the completely clockwise
(so that the AGC doesn't affect the system). Use adjust the exciter's power at
10W. Adjust TR5 to obtain the desired limiting value. Turning the trimmer
counterclockwise rises the limiting value. Note that this trimmer's adjusting
influences the valu displayed by the CPU. This adjustment shall be performed
using an external wattmeter, and after this operation the trimmer for the adjustment
of the measurement in the CPU shall be readjusted.
2 / 6 - CSBIASPJ5M01 Rev. 1.3 - 13/01/03 Technical Appendix