Digital Expansion Unit Description - ADC Digivance Installation And Operation Manual

(2) 48 VDC POWER
CONNECTOR
(1) STATUS LED
REF USER INTERFACE
No. DESIGNATION
1 STATUS
2 48 VDC
3 FIBER
TX RX
4
Note: A detailed description of LED operation is provided in Section 4.

1.4 Digital Expansion Unit Description

The DEU, shown in Figure 6, serves as a service expansion unit and line extender for the
Digivance ICS. The DEU provides the following basic functions:
•
Optical interface to the DHU and up to six DRUs or DEUs
•
Conversion of the forward path digitized optical signal to an electrical bit stream
•
Splitting of the electrical bit stream into six separate bit streams
•
Conversion of the six forward path electrical bit streams into six digital optical signals
•
Conversion of up to six reverse path digital optical signals into six serial bit streams
•
Combining of the six reverse path serial bit streams into a single digital composite signal
•
Conversion of the single digital composite signal to a digital optical signal
•
DC power for powering the DRUs
•
Alarm transport via the optical links
(3) FIBER LINK
OPTICAL ADAPTERS
TX-LEFT - RX-RIGHT
FRONT VIEW
Figure 5. Digital Remote Unit User Interface
Table 2. Digital Remote Unit User Interface
DEVICE
Multi-colored LED
(Red/Green/Yellow)
RJ-45 jack (female)
Small form factor
LC-type optical
transceiver
– SMA-type coaxial
connector (female)
ADCP-75-110 • Issue 2B • July 2001
REAR VIEW
(4) ANTENNA CONNECTOR
FUNCTIONAL
DESCRIPTION
Indicates if the status of the DRU is
normal or faulty or if the forward path
optical input is normal or lost. (see Note)
Used for connecting a DC power cable.
Used for connecting the forward path and
reverse path optical links.
Used for connecting the antenna coaxial
cable lead.
© 2001, ADC Telecommunications, Inc.
16421-A
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