San Francisco, Calif.Test-and-measurement house Highland Technology now has a Model J720 E/O (electrical-to-optical) and a Model J730 O/E (optical-to-electrical) converter. Both the J720 and J730 converters are compatible with the company's Model P400 Digital Delay/Pulse Generator and its other VME-packaged electrical/optical converter products. eeProductCenter discussed the introduction of the Model P400 here.
Why is this significant? Well, it's always been difficult to transmit fast logic over long distances using copper. Coaxial cables and twisted-pair transmission lines introduce lots of attenuation, as well as signal dispersion. They're also susceptible to ground loops and noise. The result can be jitter, pulse-width distortion, and logic errors.
Instead, Highland Technology's pair of devices converts logic levels to optical media for low-noise transport over long distances using fiber optic waveguides. Both the Model J720 and J730 use commonly available ST-connectorized 62-micron/125-micron multi-mode fiber.
A J720/J730 combo can transport logic or timing triggers across kilometers of fiber in high EMI environments, with link jitter below 10-ps RMS. The J730 delivers a digital logic output with risetime below 750-ps. It also dishes up a fast analog output (with 180-MHz bandwidth), as well as an output for monitoring link integrity.
The J720 E/O converter is powered only by its logic-level input. The J730 O/E converter requires a 12-V supply.
Click here for technical details and specs.
For more details contact Highland Technology, 320 Judah St., San Francisco, Calif. 94122. Phone: 415-753-5814. Fax: 415-753-3301.
Highland Technology, 415-753-5814, www.highlandtechnology.com