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AdV-INJ (Input Power Control (IPC) system)
chiummo, Carbognani, Derossi - 14:23 Friday 20 September 2019 (46980) Print this report
ITF input power tuning

During last night, around 22:00 LT, a slow drop of power brought the IMC transmitted power below the DMS threshold (see operator report) so this morning (around 10h00 LT) we anticipated the tuning of the input power foreseen to happen next monday. We used the EIB IPC1, axis 1 channel 1 with the manual box driver to slightly adjust the input power with a target value of 19.4W. Current value seems to oscillate a bit around 19.5W.

About the origin of this further drop, it seems related to a worsening of PMC throughput (see attached plot), while the Neovan amplifier does not seem to be blamed.

To be noticed that the power injected to the IMC seems now noisier than it was before the event of power drop.

 

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