The 1X4 divider/combiner sums up all of the input signals. There are four input signals (red, blue, green, purple). This block diagram shows another possible setting of the 4 X 2 limited fan-out configuration (LC) handover test system.
The output signal for output #1 is identical to the output signal on output #2. Attenuators #3 and #4 attenuate their input signals at 0dB. The 1X2 divider/combiner splits the signals up to both output ports.Īttenuators #1 and #2 attenuate their input signals at 0dB. This block diagram shows one possible setting of the 4 X 2 limited fan-out configuration (LC) handover test system. This design allows the RF signal on input #1 to be simultaneously available to both outputs at the same attenuation level. It shows all of the connectivity between the input ports and the output ports. This block diagram illustrates the construction of the 4 X 2 limited fan-out configuration (LC) handover test system. Keep programmable attenuators on unused paths at their maximum attenuation setting in order to maximize input to input isolation. The isolation between input ports is determined by the isolation of the 1X4 divider/combiner. Reactive power divider/combiners typically have 20dB of port to port isolation. The isolation between the two output ports is determined by the isolation of the 1X2 divider/combiner. An input signal is simultaneously available to both output port at the same attenuated level.
The input signals are summed together by the 1X4 divider/combiner and then split to both output ports by the 1X2 divider/combiner. Each input port has its own individually controlled programmable attenuator. The below block diagrams show examples of a 4 X 2 limited fan-out configuration (LC) handover test system. Example block diagrams are located below the model selection table.įor your specific application, please contact JFW for assistance or use our Inquiry Form.
REMOTE CONTROL FOR FISHER RS 717 FULL
Because the limited configuration models use fewer RF components than the full fan-out models, the cost of the limited configuration models is lower. This type of construction allows an input signal to be available to all output ports at the same attenuation level. All of the input signals are summed together and then split up to all of the output ports. These limited fan-out models have individually controlled programmable attenuators on the input ports. JFW’s limited fan-out configuration (LC) handover test systems are scaled down versions of our full fan-out handover test systems. Whether you are fading multiple base station signals to a handset or testing multiple communication standards with wireless devices, JFW has a handover test system to help automate your RF testing. Limited Fan-out Handover Test Systems for Cellular Testing Remotely Controlled Attenuator Assemblies.
REMOTE CONTROL FOR FISHER RS 717 MANUAL
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