OptoTest Breaks New Ground for IEC 61300-3-28 Transient Loss Testing with Improved OP740 Multichannel High-Speed Optical Power Meters Posted on June 23, 2021August 4, 2021 by Alex Test Share This... OptoTest has announced improvements to its OP740 multichannel high-speed optical power meters, which are now capable of simultaneous data acquisition as fast as 125,000 samples per second with an 8 µs sampling period. Continue reading →