50PA-836 Full Fan-out Handover Test System with Variable Attenuators

Full Fan-out Handover Test Systems for Cellular Testing

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.

JFW’s full fan-out handover test systems are a type of matrix switch that is constructed with power divider/combiners on both halves of the matrix with programmable attenuators in between. There is an individually controlled programmable attenuator on every RF path through the matrix. This type of construction allows every input signal to be available simultaneously to every output port at differently attenuated signal levels.

For assistance choosing a model, please contact JFW or use our Inquiry Form.

JFW Model #	Impedance	Configuration	dB Total	dB Step	Frequency Start	Frequency Stop	Control	RF Connectors
50PA-1022	50 Ohm	6 x 6 Handover System	63 dB	1 dB	20 MHz	1000 MHz	Keypad, Ethernet, RS-232	N, SMA, TNC
50PA-539	50 Ohm	4 x 4 Handover System	95 dB	1 dB	2000 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-613	50 Ohm	10 x 2 Handover System	95 dB	1 dB	700 MHz	6000 MHz	Keypad, Ethernet, RS-232	N
50PA-659	50 Ohm	6 x 6 Handover System	127 dB	1 dB	100 MHz	1000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-819	50 Ohm	2 x 2 Handover System	63 dB	1 dB	700 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-825	50 Ohm	6 x 2 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-836	50 Ohm	3 x 8 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-841	50 Ohm	4 x 16 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-842	50 Ohm	8 x 16 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-850	50 Ohm	12 x 12 Handover System	95 dB	1 dB	30 MHz	3000 MHz	Keypad, Ethernet, RS-232	N, SMA, TNC
50PA-904	50 Ohm	48 x 6 Handover System	95 dB	1 dB	700 MHz	3000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-912	50 Ohm	8 x 8 Handover System	95 dB	1 dB	2000 MHz	6000 MHz	Keypad, Ethernet, RS-232	SMA
50PA-947	50 Ohm	4 x 4 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-948	50 Ohm	4 x 2 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-950	50 Ohm	4 x 8 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-969	50 Ohm	8 x 8 Handover System	95 dB	1 dB	698 MHz	3000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-979	50 Ohm	6 x 8 Handover System	95 dB	1 dB	698 MHz	3000 MHz	Keypad, Ethernet, RS-232	SMA
50PA-982	50 Ohm	6 x 8 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	SMA
50PA-983	50 Ohm	8 x 8 Handover System	95 dB	1 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-1089	50 Ohm	4 x 4 Handover System	127 dB	1 dB	698 MHz	3000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-1248	50 Ohm	4 x 4 Handover System	70 dB	1 dB	1000 MHz	8000 MHz	Keypad, Ethernet, RS-232	N, SMA
50PA-1253	50 Ohm	4 x 8 Handover System	63.5 dB	0.5 dB	500 MHz	6000 MHz	Keypad, Ethernet, RS-232	N, SMA

Full Fan-out Handover Test System Example

The below block diagrams show examples of a full fan-out 4 X 2 handover test system. Each path through the test system has its own individually controlled programmable attenuator. This configuration allows for each input signal to be simultaneously available to each output port at differently attenuated signal levels.

The isolation between output ports is determined by summing the isolation of the input power divider/combiner (typically 20dB for reactive type dividers) with the attenuation setting of the programmable attenuators connected to the same input port. That makes it important to keep programmable attenuators on unused paths at their maximum attenuation setting in order to maximize system isolation.

Block Diagram #1

This block diagram illustrates the construction of the full fan-out 4 x 2 handover test system. It shows all of the connectivity between the input ports and the output ports. This design allows the RF signal on input #1 to be simultaneously available to both outputs at different signal levels.

Block Diagram #2

This block diagram shows one possible setting of a full fan-out 4 x 2 handover test system. There are four input signals (red, blue, green, purple). The 1 x 2 power divider/combiners split up the input signals to both output ports. The 1 x 4 divider/combiners sum up all of the input signals for each output port.

Attenuator #1 sets f1 at 0dB of attenuation for Output #1. Attenuator #2 sets f2 at 127dB of attenuation for Output #2. The RF signal on input port #1 is simultaneously available to both output ports at different signal levels.

Block Diagram #3

This block diagram shows another possible setting of a full fan-out 4 x 2 handover test system. The 1 x 2 power divider/combiners split up the input signals to both output ports. The 1 x 4 divider/combiners sum up all of the input signals for each output port.

For this example the user on output port #2 has turned off all of the input signals. The user does this by setting all of the programmable attenuators connected to output #2 to their maximum attenuation setting (i.e. 127dB). The programmable attenuators connected to output port #1 are set to various attenuation settings (i.e. 0dB, 3dB, 6dB, 9dB).

Custom Models

JFW does not charge NRE’s for custom test system models. Please email us your specific requirement. We will respond with a ROM (rough order of magnitude) quote in 1-2 days.

Remote Commands

The handover test system models are available with Ethernet/Serial remote control. Our current generation of Ethernet/Serial firmware is called 3.x.x firmware. It features easy to use ASCII formatted remote commands. Use our Ethernet Test Box to demo the 3.x.x firmware.

Test Software

JFW provides a GUI test program with all Ethernet and RS-232 controlled test systems. The test software for handover test systems has all of the remote commands built in for easy testing. Jump to our sample test programs to see example programs.