Installation of the VMU
98-133966-G1 Chapter 3: Installation 3-25
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Installation
3.4.2 Grounding the ACU
Make sure that the grounding requirements are met. See the appendix
Grounding and RF protection on page F-1 for details about grounding.
3..4.2.1 ADU cable
The ADU is connected to the ACU with the ADU cable (coax cable) with
an N connector at both ends. For information on ADU grounding, see
Grounding the ADU on page 3-22.
At the ACU end, it is strongly recommended to ground the ADU cable.
Use a short cable from the ACU to a grounding point in the rack and
connect the short cable to the ADU cable at this grounding point,
making sure the shield of the connector is properly connected to the
rack.
3..4.2.2 Ground stud at the ACU
To ensure that the ACU is grounded – also if the ADU cable is
disconnected from the ACU, connect an extra ground wire from the rack
to the ground stud on the ACU. This ground wire must be a heavy wire or
braid cable with a larger diameter than the coax cable.
3.5 Installation of the VMU
For a list of supported VSAT modems see the SAILOR 900 VSAT data
sheet or Figure 6-16: Web interface: SETTINGS, VSAT modem profile –
supported modems.
3.5.1 General mounting considerations —
VMU
1. Mount the VMU close to the ACU, preferably at a distance < 1 m.
2. Connect all cables. See Interfaces of the VMU on page 4-8 for a
description of the connectors for supported VSAT modems.
For cable specifications see VMU cables on page B-1.
3..5.1.1 Connectors and pin-out of the VMU
For connectors and pin-out see the user documentation of the VMU and
Interfaces of the VMU on page 4-8.
3..5.1.2 Wiring Power
Provide power to the VMU, see the user documentation of the unit.
Figure 3-24: ACU, 19” rack version, ground stud
SAILOR900TM.book Page 25 Monday, September 16, 2013 11:01 AM
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