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Test & Measurement Fibre Optic Links

Our Test & Measurement Fibre-Optic-Link (FOL) Systems allow the user to transmit an electrical signal out of an area of high electromagnetic field strength to monitoring test equipment over optical fibre. For example, the output from a field sensor in an EMC test chamber may be transmitted to a spectrum analyser or oscilloscope in a low field environment. Because the information is sent over optical fibre, there is none of the breakthrough or signal impairment seen with coaxial cable. Interference is not conducted into or out of the test area. The systems are effectively transparent to any type of electrical signal within their stated frequency ranges.
 

Product Description:
 

System Configuration:

A FOL system consists of a shielded Transmitter connected to a Receiver/Controller via a Fibre Optic Cable. An electrical signal applied to the input connector on the Transmitter is converted into an optical signal for transmission over the optical fibre to the Receiver, where it is it converted back into an electrical signal. The Transmitter is electromagnetically shielded for operation without breakthrough in very high field levels. The Receiver module may be plugged in to a Folnet Controller (available in single channel or a 19" 5 channel version). The Folnet Controller provides full remote control of the Transmitter gain, input selection, input impedance, Transmitter on/off and other functions. This enables the user to set up the link optimally for any measurement conditions. The user may control these functions via the front panel of the Folnet Controller, or by computer over the RS232 or IEEE/GPIB buses.

An important feature of a Fibre-Optic-Link is the Simultaneous Dynamic Range (SDR) i.e. the difference between the smallest and largest signals that may be transmitted through the link at the same time, without excessive distortion or noise degradation. Our links offer unparalleled SDR. Furthermore, the user controllable gain function allows the user to shift the SDR up or down to precisely match the signals being monitored. Our range of Test & Measurement Fibre-Optic-Link Systems covers almost every requirement of EMC testing.