User's Manual

ADCP-75-132 • Issue 2C • August 2006
Page 30
© 2006, ADC Telecommunications, Inc.
ALIGN DIP SWITCH HANDLES AS
SHOWN ON THE LABEL TO PROVIDE
SPECIFIED FREQUENCY BAND
16816-B
SWITCH POSITIONS AS SEEN THROUGH HOLE
MOVABLE TAB SHOWN WHITE
BLOCK A,D
BLOCK D,B,E
BLOCK B,E,F
BLOCK E,F,C
FORWARD
1930-1950
1945-1970
1950-1975
1965-1990
REVERSE
1850-1870
1865-1890
1870-1895
1885-1910
SWITCH POSITIONS AS SEEN THROUGH HOLE
MOVABLE TAB SHOWN WHITE
BLOCK A,D
BLOCK D,B,E
BLOCK B,E,F
BLOCK E,F,C
FORWARD
1930-1950
1945-1970
1950-1975
1965-1990
REVERSE
1850-1870
1865-1890
1870-1895
1885-1910
Figure 13. 1900 MHz Frequency Band Selection
4.5 Mounting Procedure
The DHU may be either rack-mounted or wall-mounted. Of the procedures that follow, use
whichever procedure is appropriate for the installation:
Note: To insure that all optical connectors and transceivers remain dust-free during
installation, leave all dust caps and dust protectors in place until directed to remove
them for connection.
4.5.1 Rack Mount Installation
The DHU may be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. Both US
standard and metric machine screws are included for rack mounting the DHU. When loading the
DHU in a rack, make sure the mechanical loading of the rack is even to avoid a hazardous
condition such as a severely unbalanced rack. The rack should safely support the combined weight
of all the equipment it holds and be securely anchored. In addition, the maximum recommended
ambient temperature for the DHU is 50º C (122º F). Allow sufficient air circulation or space
between units when the DHU is installed in a multi-unit rack assembly because the operating
ambient temperature of the rack environment might be greater than room ambient.
Warning: Wet conditions increase the potential for receiving an electrical shock when
installing or using electrically-powered equipment. To prevent electrical shock, never install
or use electrical equipment in a wet location or during a lightning storm.
Use the following procedure to install the DHU in the equipment rack:
1. The DHU is shipped with the mounting brackets installed for 19-inch rack installations.
If mounting the DHU in a 19-inch rack, proceed to step 4. If mounting the DHU in a 23-
inch rack, proceed to step 2.
2. Remove both mounting brackets from the DHU (requires TORX screwdriver with T20 bit)