Exalt Installation and Management Guide
EX-i Series FDD Digital Microwave Radios
202675-005
21
2011-08-30
Power
The radio requires a DC power source within specifications. DC can be provided from a DC battery
source, central lab/rack supply to the power injector (sold separately), or from the optional AC power
injector.
Terminating the RF Connector
There are a few simple means to accommodate proper termination:
•
Connect a 50-Ohm coaxial termination device to the RF port of the radio. The termination must be
rated to 1W (or more). Example(s) include:
– Broadwave Technologies P/N 552-200-002, or similar
•
Connect the complete transmission system. That is, the RF cabling including the antenna. The
cabled antenna provides a proper termination for the RF output.
•
Connect a fixed (or a series of fixed) 50-Ohm attenuator(s) to the RF connector, either directly or
at the end of an RF transmission line. The attenuator must be at least 30dB as specified at the
operating frequency and rated for a minimum of 2W input power. Examples include:
– Broadwave Technologies P/N 352-103-xxx
– Bird 2-A-MFN-xx
– JFW Industries 50FP-xxx-H6-N
DC Power
The DC voltage input accepts either 24 volts or 48 volts, nominal. Ensure that the power source is
specified for the proper amount of current delivery capacity. The DC power may be connected as a
positive or negative voltage supply, and be referenced to ground or ‘floating’ (differential voltage).
There are different system grounding considerations depending on the nature of the DC supply
grounding, and consult a qualified electrician or telecoms professional on the proper wiring and
grounding process. Only one power source is required, but two power connectors are provided for
input power redundancy.
To connect a DC source, with the power disabled on the DC supply, connect proper gauge wiring to
the DC supply. For most (short) power cable runs, 18AWG or 24AWG wire can be typically used.
Strip the ends just long enough for enclosure to the DC radio connector (approximately 0.25 inches/
6mm). If using stranded wire, the stripped ends inserted into the DC terminal connector must be
solder-tipped. If using solid wire, a solder tip is not necessary. Ensure that the power wiring is long
enough to neatly traverse, when properly dressed, between the source supply and the radio mounting
location. If DC wires are to be exposed to outdoor environments, use wire in the proper weatherproof
wiring jacket.
Note:
No AC adapter is provided with these radios. Exalt recommends using a DC power
plant.
Read this section completely before applying power.
Caution!
Before applying power, the device’s RF connector must be properly terminated
into a 50-Ohm load. If this is not performed, the radio may be damaged by simply applying
power. Also, there are human safety factors to consider regarding potentially harmful RF
radiation.
Summary of Contents for EX i GigE Series
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