Interface Connector Guide

                  SMA                      TNC                        Type N                  SO-239             N (f) to SMA (f)

JRE offers a wide variety of RF connectors, each with attached dust cap. Generally connectors are bulkhead style meaning a Female connector style appearing on each side of the interface plate.

DC/AC Power Terminal Strips

4 Terminal and 6 Terminal Barrier Strip - with 2500 pf feedthru filtering, 100 VDC/250VAC @ 20A

Use these heavy duty barrier terminal strips to allow RF filtered entry into the enclosure for AC or DC power.

Serial Data Connectors

These serial data connectors are bulkhead style without any RF filtering. If an RF filtered interface is needed, a filtered DB style connector is used along with an adapter to the desired serial connector. Various capacitances are available in the DB connector for best trade-off between serial data speed and RF frequency attenuation. JRE Test  stocks three values of filtered DB connectors that will pass various data rates. A capacitance of 1000 pf is used for data rates speeds up to 10 MBPS, 310 pf for speeds up to 50 MBPS, 100 pf for speeds up to 100 MBPS, and 10 pf for speeds up to 1000 MBPS.  Higher capacitance filter networks provide higher levels of shielding effectiveness, at the expense of slowing the data speeds, while lower capacitance allows faster data speed but poorer RF isolation. For true USB 2.0 speeds, JRE offers the industry's only RF filtered interface (below). 

USB 2.0 Serial Data Filtered Interface

The JRE USB 2.0 Filter consists of two sets of high speed USB 2.0 ports. Each USB port is designed to reject frequencies greater than 1 GHz while passing data and power between a host computer on one side and a USB device on the other.  Fully USB compliant, correct enumeration process ensures any test ‘hiccups’ will be properly exchanged between devices, i.e.: no hang-ups are undetected, a problem when using fiber optic or other such interfaces! The USB interface consists of a balanced pair of bi-directional data lines and an unbalanced power and return pair. Each output cable is 4 inches (minimum) long. The USB cable and connectors have the standard USB 2.0 pinout and configuration. The data line filters pass the up to 480Mbps of USB Type 1 or 2 data while providing rejection greater than 80dB from 1GHz through 6 GHz. The power line filters pass the DC power and return while providing rejection greater than 80dB from 1MHz through 6 GHz.

DB Series Connectors

                                           DB-25                                         DB-9                  Dust Cover

These filtered DB style connectors are used for general serial I/O into the enclosure, they may be used alone or in conjunction with adapters to meet most any connector style needed. JRE Test stocks three values of filtered DB connectors that will pass various data rates. A capacitance of 1000 pf is used for data rates speeds up to 10 MBPS, 310 pf for speeds up to 50 MBPS, 100 pf for speeds up to 100 MBPS, and 10 pf for speeds up to 1000 MBPS.  Higher capacitance filter networks provide higher levels of shielding effectiveness, at the expense of slowing the data speeds, while lower capacitance allows faster data speed but poorer RF isolation.

Fiber Optic Connectors

Fiber optic connector I/O offers the ultimate in RF shielding as there is no ohmic connection, only light.