This internal surge protection supplements
the correct implementation of external surge
protection and grounding practices that
should be fitted to all receiver antenna and
feeder installations.
TTa InTeRFace
a Tower Top amplifier (TTa) Interface can be incorporated into a Receiver Multicoupler
application. This capability allows the deployment of an optional TTa with a Receiver
Multicoupler to provide the benefits of improved system uplink performance into a
network.
This capability provides a future TTa deployment capability to a receiver combiner
system utilising this Receiver Multicoupler product range.
Low noIse aMpLIFIeR
a quadrature Low noise amplifier (Lna) design is utilised in the Receiver Multicoupler to provide optimised performance.
The use of high 3oIp devices and design practices within the Lna ensures that high linearity and low intermodulation
susceptibility is provided across a broad dynamic range of input signal levels. This capability is particularly important
for in-building and in-tunnel systems that may experience high input levels when radio handsets can venture into close
proximity of antennas or radiating cables.
For digital technologies, this broad dynamic range capability can assist in ensuring maximum performance is provided
across the entire range of RF input levels – from the weakest signal from a distant portable, to a strong signal from a
nearby mobile. This capability can allow the full potential of low bit error rate (BeR) performance in the network’s
uplink (or
“
talk-in
”
)
sensitivity to be realised.
an additional benefit of the quadrature Lna design is the inherent redundancy of the parallel amplifier stages. an auto-
Gain feature automatically restores the set gain of the Receiver Multicoupler in the event of failure impacting one am-
plifier stage within the quadrature amplifier, allowing continued operation and ensuring the network remains in operation
until the fault is rectified. Integral amplifier stage status monitoring will provide an alarm Led indication and relay con-
tact output to report the alarm state. This level of redundancy provides an inherent level of fault tolerance and network
resiliency that can be of particular benefit in operations-critical applications.
RF INPUT
RF INPUT
EXP PORT
RF OUTPUTS
50
OHM TERMINATION
RxMUX
TTA
TTA POWER SUPPLY
RECEIVER MULTICOUPLER
COAXIAL
FEEDER
