Remote Control Unit(RCU)

Remote Control Unit(RCU)
RCU-003(II-2) is a compact and light weight actuator that mechanically connects to the electrical phase shifter of Comba VET antenna for remote adjustment of electrical down-tilt angle. It is designed to comply with AISG 2.0 standards and works with AISG compliant Node B and antenna line devices.

Smart Bias Tee SBT:
The Smart Bias Tee is used to inject DC voltage and to modulate and demodulate remote control signals, via the RF coaxial cable, to antenna line devices such as TMA and RCU. It is designed to comply with AISG 2.0 standard and can be used as a lightning protection device for the BTS/Node B.

#Electric down tilt
-Electrical downtilt uses a phase taper in the antenna array to angle the pattern downwards.
-This allows the the antenna to be mounted vertically.
-Electrical downtilt is the only practical way to achieve pattern downtilting with omnidirectional antennas.
-Electrical downtilt affects both front and back lobes.
-If the front lobe is downtilted the back lobe is also downtilted by equal amount.
-Electrical downtilting also reduces the gain equally at all angles on the horizon. The that adjusted downtilt angle is constant over the whole azimuth range.

#Mechanical Down Tilt
-With mechanical down tilting, the main beam will be down tilted but the back lobe will be up tilted that make interference. -With mechanical tilting you can’t change the tilt of one band alone.

This is one of the potential drawback as compared to the electrical downtilt because coverage behind the antenna can be negatively affected as the back lobe rises above the horizon.

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