User's Manual

High Power Wideband Radio Head (WRH-V) Overview
044-05251 Rev A 1-5
Figure 1-3 CU PCBA
Low Noise Amplifier (LNA)
LNAs are used on the uplink and are located at the top of the cabinet and the high cover, if equipped. An
example of an LNA is illustrated in Figure 1-4. All of the coaxial connectors are SMA-type. Signals from the DPX
output are fed to the LNA input connector (IN). The OUT1 and OUT2 outputs feed the WBAs in the UL direction.
The signal level at these connectors is +20dB referenced to the antenna input. The other output, OUT LOW, is
an expansion output for an additional LNA if the WRH-V is equipped with a unit in the cover part of the chassis.
The gain to this connector is +2dB. The +7V input is used for +7V supply from the DIA PCBA and the ATT
connection is for the control signal for a controllable attenuator in the LNA.
Figure 1-4 LNA
Duplex Filter (DPX)
DPXs are located on the metal cover sheet in the upper part of the cabinet.
Fiber Optic Unit (FOU)
The FOU is a metal plate mounted on top of the cover plate in the upper part of the WRH. The FON and fiber
optic connectors are mounted on the FOU. Figure 1-5 illustrates an FOU with the FON and fiber optic
connectors mounted on the plate. It can also be configured with combiners, splitters, and Wave Division
Multiplexers (WDMs) to obtain a desired combination of several branches with double or single fiber.
Figure 1-5 FOU in WRH-V
FON
DPX