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Equalizer
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Equalizers are generally associated with devices designed to reduce or remove group delay variations across a filter band. However, some equalizers are meant to flatten gain across the operational band of an amplifier, filter, or complete system.

Higher order filters, with corresponding greater out-of-band attenuation, exhibit higher levels of group delay variations at the band edges. Group delay variation distorts signals by varying the time that the spectral components to move from the input to the output of the filter. Square waves, for instance, contain their highest frequency components at the band edges, so on a filter with a lot of group delay, the square wave will exit with rounded and otherwise distorted edges. Such distortion can (and will) negatively affect the bit error rate (BER) of digital communications.

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KR Electronics Avenel, NJ Tel:  (732) 636-1900 For over 40 years KR Electronics has designed and manufactured high quality filters for the commercial and military markets. KR Electronics manufactures all filter types and individually synthesizes filters for special applications. State of the art computer synthesis, analysis and test methods are used to meet the most challenging specifications. • Custom & Standard Filters • Low Cost & High Performance • Bandpass • Lowpass • Anti-Aliasing • Linear Phase • Phase Matched • Absorptive • Coils & Transformers • Highpass & Notch • Diplexers • Equalizers • Surface Mount • Fast Response • DC to 9 GHz • Root & Full Cosine • ISO 9001:2008 Certified • Prototypes to Production • J-STD-001 Certified Operators Aeroflex-Inmet | aeroflex-inmet.com 888-244-6638 | Ann Arbor, MI Adapters, amplifiers, attenuators, bias tees, DC blocks, gain equalizers, power dividers, terminations. Akon | akoninc.com 408-432-8039 | San Jose, CA Microwave amplifiers 0.5 to 20.0 GHz, power dividers and gain (slope) equalizers 1.0 to 18.0 GHz, converter assemblies 2.0-20.0 GHz, filter banks and switch filter banks 2.0-18.0 GHz, discriminators. Blueline Engineering Corp | bluelineengineering.com 203-838-8296 | Norwalk, CT RF/Microwave Components, 100 MHz-40 GHz, including amplifiers, equalizers, DLVA's, SDLVA's, Log IF, integrated subassemblies, switched filters, switched multipliers, upconverters, and downconverters. Custom Microwave Components, Inc | customwave.com 510-651-3434 | Fremont, CA RF & microwave PIN diode & GaAs FET switches, switch matrices, switch/filter matrices, analog & digital attenuators and phase shifters, limiters, power dividers/combiners, couplers, fixed & variable equalizers.

Eclipse Microwave, Inc | eclipsemicrowave.com 408-526-1100 | San Jose, CA Designs and manufactures a wide selection of microwave products including microwave mixers, frequency doublers, detectors, equalizers, pin diode limiters, broadband couplers, broadband power dividers. Inmet - (now Aeroflex) | inmetcorp.com 888-244-6638 | Ann Arbor, MI Fixed, 2.4mm, 2.92mm, 3.5mm, 7mm, 7/16, SMA, N, F, BNC, TNC, GPO connectors, from dc to 2, 4, 6, 12.4, 18, 26.5, 40 & 50 GHz, values 0 to 60 dB, power to 300 W. Mica Microwave (now Mercury Systems) | mica-mw.com 209-825-3977 | Manteca, CA Circulators, isolators, mixers, equalizers, phase shifters. Microwave Circuits, Inc | diplexers.com 434-455-2800 | Lynchburg, VA High performance RF/Microwave filters, diplexers and duplexers from DC - 20 GHz, tunable filters and cavities, ceramic filters, surface mount filters, notch filters. Midwest Microwave (now Emerson Network Power) | midwest-microwave.com 734-429-4773 | Saline, MI Attenuators,  terminations, DC blocks, couplers, power dividers, equalizers, phase shifters, adapters, cable assemblies, connectors - SMA, BMA, N Type, 7 mm, 3.5mm, QPL/DSCC approved products, tools, gauges, guides. NeoPhotonics Corp | neophotonics.com 408-232-9200 | San Jose, CA Provider of photonic integrated circuit-based modules, components and subsystems for use in optical communications networks including the Dynamic Channel Equalizer product line which is used to configure ROADMs and Optical Nodes to equalize or block individual optical channels and enables dynamic provisioning in the network. R.A. Wood Associates | rawood.com 315-735-4217 | Utica, NY Engineering consulting services, computer automated test design & development, engineering prototypes & low rate manufacturing, RF/Microwave system design & analysis, subcontract specifications, wireless system design, custom software program development, LabVIEW software development, lectures & training classes, computer consulting services. Software: SpurFinder®, TunerHelper®, RFSpecTest®, PathLossSolver®, Painless Extraction®. Equalizers on Demand - amplitude flatteners.

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