Request InfoSpectrum Instrumentation Corp.Spectrum Instrumentation Corp. has announced three new arbitrary waveform generators for scientists working in optics and other fields. The new models of the M4i.66xx series offer one, two and four channels, with each channel capable of outputting electronic signals at rates of up to 625 megasamples per second with 16-bit resolution. That combination makes the devices suitable for generating high-frequency signals up to 200 MHz with accuracy and fidelity. The generators are smaller than conventional instruments and can be used in most modern PCs.See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra September 2022 IssueLight-Dependent Resistor PhotocellsCadmium Sulfide (CdS) Light-Dependent Resistors (LDRs) from Advanced Photonix Inc. are designed for visible light measurement from 400 to 700 nm. 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