User's Manual

ADCP-75-110 • Issue 2B • July 2001
Page 23
© 2001, ADC Telecommunications, Inc.
DIAMETER - 4.25 INCH (105 MM)
DEPTH - 0.57 INCH (14 MM)
2.5 INCHES
(64 MM)
0.5 INCHES
(13 MM)
3 INCHES
(76 MM)
5 INCHES
(127 MM)
4.6 INCHES
(118 MM)
1.4 INCHES
36 MM)
4 dBi GAIN
CEILING-MOUNT
HALLWAY
2.5 dBi GAIN CEILING-MOUNT
OMNIDIRECTIONAL
ALL ANTENNAS ARE EQUIPPED WITH
A 72-INCH RG58/U CABLE TERMINATED
WITH A MALE SMA CONNECTOR
MOUNTING STUD
LENGTH - 1.5 INCHES (38 mm)
DIAMETER - 0.875 INCHES (22 MM)
Fig 13-A
MOUNTING BASE
LENGTH - 2.5 INCHES
(64 MM)
7.5 dBi GAIN
90 DIRECTIONAL PANEL
(COMBINATION WALL
AND CORNER MOUNT)
Figure 13. 1900 MHz DRU Antenna Options
2.8 External Alarm System Reporting Requirements
The DHU provides normally open (NO) and normally closed (NC) dry alarm contacts for
reporting minor and major alarms to an external alarm system. A minor alarm is defined as a
high temperature condition. A major alarm is defined as any fault condition except high
temperature. Connections to the alarm contacts are provided through a screw-type terminal
strip. Use category 3 or 5 cable for the alarm wires. If an external alarm system is not in use,
no alarm connections are required.
2.9 Frequency Band Selection Requirements (1900 MHz)
The 1900 MHz version of the DHU and DRU must be configured by the installer to operate in
the appropriate forward and reverse path frequency band. Four band selections (AD, DBE,
BEF, and EFC) are possible. A DIP switch on the underside of each unit is provided for
selecting the required frequency band. The band selection must be done prior to installation
since the DIP switch is usually not accessible after the unit is mounted. Once the required
selection has been made, no further band adjustments are required.