Installation
Before installing the MediaStar 770 rack, ensure that the Regulatory Requirement Notices and Important Safety
Instructions at the beginning of this guide have been read.
Ensure that the mains supply has an adequate capacity and a reliable protective earth connection, particularly when
power distribution strips are used in equipment racks. If using a dual redundant PSU, ensure the mains supply on
each input is independent so the rack will continue to operate if one mains supply fails. If connecting a rack overloads
a mains fuse or over-current trip, all the equipment on that mains supply will be shut down. The mains power
required for the rack can be found on the rear of the unit.
NOTE: Where a 770 rack is tted with dual redundant power supplies, hazardous mains voltages will still
be present inside the rack until BOTH mains cables have been removed.
If there is any doubt whatsoever about these installation requirements, a qualied electrician must be consulted.
Atmospheric electricity
Connection of the MediaStar 770 rack or processor modules directly or indirectly to a roof-top antenna without
suitable protection devices can leave the unit vulnerable to lightning strike/ atmospheric electrical discharge that
may result in damage and void the manufacturer’s warranty.
To minimise the possibility of damage from atmospheric electricity always:
• Follow best practice as dictated by your local electrical code and/or trade association.
• Use coaxial over-voltage protection units.
• Bond all masts and antennas to the building protective earth, and where available, the lightning protection system.
• Ensure that the screens of all coaxial cables entering and leaving the headend and/or ampliers are bonded to the
protective earth.
NOTE: Reliance upon the MediaStar 770 rack safety earth provided by the AC power cord alone is insucient
to protect the unit from atmospheric voltage discharges.
Mounting the 770 unit in a 19” rack
All MediaStar equipment has a maximum operating temperature of 40°C. When mounting inside an enclosed 19”
rack tower, ensure there is sucient cool free ventilation airow to keep MediaStar equipment below its maximum
operating temperature. When mounting the 770 unit, ensure that the ventilation and fan grills in the sides remain
un-obstructed.
Use the mounting screws provided to x the 770 unit to the rack rails in all four positions.
Connect the 770 unit to the mains with the IEC mains cable(s) provided. On the power supply module(s), the front
panel ‘POWER’ indicator should be illuminated (blue) and the ‘FAN’ indicator should be green. This indicates the
power supplies are working within their voltage limits and the fans are operating. The ‘FAULT’ indicator should be o.
If there is a problem with either the FAN operation or the PSU DC output voltages the ‘FAULT’ indicator will be
illuminated red. If the fans are stalled or turning too slowly, the ‘FAN’ indicator will be illuminated red too. In a
770-DR rack, a PSU’s blue ‘POWER’ indicator will ash if there is no mains going into it or if the PSU has totally failed.
Quick Start Guide
770 Rack Installation Guide
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