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16.Motor Driver Module for Azimuth (DDM/SMD).
17.As in item 3 above.
18.Azimuth motor.
19.Azimuth encoder.
20.Rotary joint.
The cable signals for the ADU (DC power, internal modem communication, TX IF,
RX and L-band TX) to and from the ACU have to be ported from the stationary
platform to the azimuth rotating part of the ADU. This is done via the rotary joint.
21.Feed horn.
Before contacting your service partner check the LEDs on all modules (VIM3, DDMs,
PCM2, PMM and ISM). See LEDs of the ADU modules on page 7-15 and LEDs in the
ACU on page 7-16.
Figure 7-16: Above Deck Unit modules 2/2
Removal and replacement of ADU modules
7-19
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