ADC Telecommunications Inc. DVICS1900-1 Benutzerhandbuch
ADCP-75-112
•
Issue 2A
•
June 2001
Page 4
©
©
2001, ADC Telecommunications, Inc.
The
DRU is equipped with a female RJ-45 jack that provides a point for connecting a DC
power
cable. The DRU is powered by 34–48 Vdc power which is supplied through the RJ-45
connector.
Power to the DRU may be supplied by the DHU, DEU, or by a 120 Vac to 48 Vdc
power
converter (available separately as an accessory item) plugged into a properly grounded
120
Vac outlet. The AC/DC converter is a UL Listed stand alone Limited Power Supply (LPS)
unit
with a rated output of 48 Vdc at 1.2 A. When powered by the DHU or DEU, a category 3
or
5 twisted-pair cable terminated with RJ-45 connectors is required. The recommended
maximum
length of the power cable is 500 meters (1,641 feet). Any distance beyond 500
meters
requires powering by the AC/DC converter.
The
DRU user interface consists of the connectors and the LED that are provided on the DRU
front
and rear panels. The DRU user interface points are indicated in Figure 2 and described in
Table
1.
16421-A
REAR VIEW
FRONT VIEW
(4) ANTENNA CONNECTOR
(1) STATUS LED
(2) 48 VDC POWER
CONNECTOR
(3) FIBER LINK
OPTICAL ADAPTERS
TX-LEFT - RX-RIGHT
Figure 2. Digital Remote Unit User Interface
Table 1. Digital Remote Unit User Interface
REF
No.
USER INTERFACE
DESIGNATION
DEVICE
FUNCTIONAL
DESCRIPTION
1
STATUS
Multi-colored
LED
(Red/Green/Yellow)
Indicates
if the status of the DRU is
normal
or faulty or if the forward path
optical
input is normal or lost. (see Note)
2
48
Vdc
RJ-45
jack (female)
Used
for connecting a DC power cable.
3
FIBER
TX
TX
RX
Small
form factor
LC-type
optical
transceiver
Used
for connecting the forward path
and
reverse path optical links.
4
–
SMA-type
coaxial
connector
(female)
Used
for connecting the antenna coaxial
cable
lead.
Note:
A detailed description of DEU LED operation is provided in the Digivance ICS
Installation
and Operation Manual (ADCP-75-110)