LBDG-250-DC-8200-1
1.3 Housing
A rugged die cast aluminum housing with a clamshell design is used.
Externally, the housing has installation mounts and four connectors:
•
A 5/8-24 threaded bushing for KS type connection to the HFC
network.
•
A type F test point connector. Signal levels read at this connector
are -20dB relative to the cable modem F port.
•
A weather-tight Ethernet port (RJ45 jack) for connection to a
device.
•
A weather-tight bayonet style connector for power delivery.
Dual gaskets provide for -100dB EMI isolation and an airtight seal to 15
PSI.
The housing can be strand mounted. An optional hardware kit for wall,
mast or pedestal mounting is availab le.
The station size is approximately 406 x 228 x 165mm (16 x 9 x 6.5
”),
not including connectors. Its weight is around 5.1 Kg (11.2 Lbs.).
1.4 Major Components
Internally, the housing bottom contains the HFC interface board and
DOCSIS 3.1 cable modem.
The +12V
DC
& -55V
DC
power supplies are housed in the lid. These are
high efficiency switch mode power supplies . Filtering to prevent the
switching regulator noise from reaching the AC and DC lines is
provided.
The lid interconnects to the housing base with a power cable wiring
harness.
1.5
Interface Board
The interface circuit board, which is located in the housing base,
provides the interface to the HFC network. The following features are
provided:
•
An AC/RF filter is used to separate the AC power from the R F
carriers.
•
Sockets for the separate padding of forward and reverse DOCSIS
signals.
•
A Test Point provides -20dB coupling of forward and reverse
power at the cable modem port.
