Andrew ION-B Series, User Manual

Page: 75 / 181

75 MN024-010
TFAM
Case R2
Power supply:
Each case-R2 Remote Unit must be ordered with
a proper TPSN external power supply (Fig. 3.5.4),
available either for universal mains (90 to 264) or for
negative supply. (-72 to -36 Vdc).
Before installing your Remote Unit, please check
you have been provided with the proper external
power supply. Should you have any doubt, please
contact your Sales representative.
The nominal Voltage provided by the TPSN external
power supply is +28Vdc.
Warnings (to be read before Remote Units are installed)
Dealing with optical output ports
The Cabinet-R2 Remote Unit contains semiconductor lasers. Invisible laser beams may be
emitted from the optical output ports. Do not look towards the optical ports while equipment
is switched on.
Choosing a proper installation site for the Remote Units
• Cabinet R2 Remote Units have to be installed as close as possible to the radiating
antennas, in order to minimize coaxial cable length, thus reducing downlink power loss
and uplink noise fi gure.
• When positioning the Cabinet-R2 Remote Unit, pay attention that the placing of related
antennas should be decided in order to minimize the Minimum Coupling Loss (MLC), so as
to avoid blocking.
• The Cabinet-R2 Remote Unit is intended to be fi xed on walls or other fl at vertical surfaces.
Handling optical connections
• When inserting an optical connector, take care to handle it so smoothly that the optical
fi bre is not damaged. Optical fi bres are to be single-mode (SM) 9.5/125µm.
• Typically, ION-B equipment is provided with SC-APC optical connectors (other connectors
may be provided on request). Inserting any other connectors will result in severe
damages.
• Do not force or stretch the fi bre pigtail with radius of curvature less than 5cm. See
rightward fi gure for optimal fi bre cabling.
• Remove the adapter caps only just before making connections. Do not leave any SC-
Figure 3.5.4. TPSN External Power Supply
for TFAx Case-R2 Remote Unit