Profile: A E A Technology, Inc. specializes in offering network analyzers, SWR meters, time domain reflectometers (TDR) and MRI coil testers. The Echo™ is a hand-held vector impedance analyzer (vector network analyzer), spectrum analyzer, power meter, and frequency domain reflectometer (FDR) in one instrument. Echo models come in frequency ranges of 4MHz-to-1.0GHz or 4MHz-to-2.5GHz. The VIA Echo™ network analyzer was designed for performing antenna testing & tuning, transmission line testing & fault locating, cellular site turn-up testing and troubleshooting. It can be used for individual component testing, system or network testing. In a production environment it can be used to verify components and assemblies. It features two ports, S11 & S21, to perform both reflective and loss/gain measurements. The CellMate™ EX is an antenna analyzer that operates in the cellular frequency range of 600 -999 MHz. This low cost analyzer provides graphical plots of SWR and return loss, numerical results, and plot storage.