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High Speed Solutions




The Virginia Panel QuadraPaddle contacts and modules have been successfully used in applications of ethernet transmission for 10/100/1000baseT connected to a RJ45 connector. Testing of the QuadraPaddle connector module and contact by use of a Tektronix CSA803 Digital Sampling Oscilloscope and validation based on Time Dome Reflection Measurements has shown a low end bandwidth of 700MHz when wired using a 50 Ohm enviroment cabling, refer to Figure 1.

This is based on standard accepted value of a -3dB rolloff for signal degradation. The contacts and module have shown -3dB rolloff response of 1.2 GHz as de-embedded from the overall response measurement of the connection system. See Figure 2. Based on this data and known application usage of the QuadraPaddle product, it is feasible for the application. For high speed applications the cable must be installed and terminated properly. Incorrect installation techniques include kinking the cable or bending it with too tight of a radius. Incorrect termination techniques include untwisting the wire pairs or stripping the outer jacket back too far.





The Virginia Panel QuadraPaddle contacts and modules have been successfully tested in applications up to 2.4 Gbps using the grounding configurations below. Shielded paired wires must be used and configured such that the S+ and S- locations are the signals and the GND locations are daisy chained to the shield. Placement of grounds between paired sets of pins within the connector will reduce existing crosstalk, thus improving signal performance. These pin configurations are considered the recommended best practice.

 


The Virginia Panel 50 Ohm Micro Coax contacts have been tested as terminated to an Infinius HDMI 1.4 cable (typical rate of 7.5 Gbps). Testing of the Micro Coax connector by use of a setup shown in the visual representation below in which the Infinius HDMI 1.4 cable was cut and terminated to VPC's Micro Coax receiver and ITA pins which were mated to close the circuit, refer to Figures 1 and 2.

 

Based on a 50 Ohm (100 Ohm differential) impedance for an HDMI cable, the contacts have shown a range of impedance from 96 Ohms to 102 Ohms. (Figure 3). Based on this data, higher speed applications are available. For high speed applications the cable must be installed and terminated properly. Incorrect installation techniques include kinking the cable or bending it with too tight of a radius. Incorrect termination techniques include untwisting the wire pairs or stripping the outer jacket back too far.