Tru Cal International - Bensenville, IL
Distributor, Service Company
ISO 9001:2008 & ISO/IEC 17025:2005 certified. Stocking distributor of new & used network analyzers for manufacturing & research & development applications. Analyzers are available in various models & can be used to measure magnitude/phase, insertion loss, group delay, reflection coefficients, impedance, SWR, electrical length & gain compression from 5 Hz to 1.8 GHz.
Brand Names: Agilent, Hewlett-Packard

Tekno Telecom - Naperville, IL
Manufacturer
Network Monitoring, Billing, Revenue Assurance Systems

Continental Resources, Inc. - Wood Dale, IL
Distributor, Service Company
ISO 9001:2000 certified distributor of testing equipment. Testing equipment includes AC & DC power supplies, cables, calibrators, compliance test equipment, counters, data acquisition systems, fiber optic testers, hi-pot meters, impedance measurers, noise figure testers, optic accessories, oscilloscopes, power quality measurement equipment, probes, RF accessories, RF power measurers & wireless communication test equipment. Analyzers are available for measuring optical spectrum, audio, signal, telecom & logic.

Contemporary Control Systems, Inc. - Downers Grove, IL
Manufacturer
Handheld Arcnet