2.2. POLARX5S DES
I
GN
2.2.2 Rear panel
Figure 2-2 shows the layout of the rear-panel connectors on the PolaRx5S. More information
on these connectors can be found in Appendix B.
Figure 2-2:
PolaRx5S rear-panel layout
2.2.3 Powering the Receiver
The receiver can be powered through either:
•
The PWR connector (9-30 VDC)
•
The Ethernet connector (Power over Ethernet - PoE, 37-57 VDC). Please note that only
mode A, as speci
fi
ed in the 802.3af standard, is supported.
I
f power is provided through both the Ethernet and the PWR connectors, Ethernet power
takes precedence.
This allows the connection of a back-up battery to the ODU PWR
connector. The battery will only be used in case of an outage of the power over Ethernet.
The current power source (PWR or Ethernet connector), and the voltage at the PWR
connector are reported in the
PowerStatus
SBF bock.
2.2.4 Power Button
When power is initially applied to the PWR or Ethernet connector, or after a power outage,
the receiver always starts up without the need to press the power button.
Pressing the power button when the receiver is turned on will send the receiver into stand-by
mode. Pressing the button again switches the receiver back on.
I
n all cases, the state of the power button is not retained across a power outage.
I
f the
receiver was in stand-by mode before the power outage, it will restart when power is
restored.
11
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