Using Test Cells Chase EMC's emCell is a representative evolution of classic TEM cell construction. Useful frequency response lies between 100 kHz and 2 GHz without needing software flatness corrections. Current instrumentation limits high frequency operation to 1 GHz. Field uniformity compares with large test chambers for equipment up to 0.025 cubic metres in volume, but you can test larger equipment with a reduction in performance. You can also use the emCell to monitor near field radiated emissions from your equipment by connecting a spectrum analyser to its input.
Spectrum analysers are favourite for development use because they quickly identify peak emissions.
Like the other cells in the Product Survey Table, the emCell comes as a system. Instrumentation comprises the signal generator, RF power amplifier and attenuators, and includes cabling. The software includes pre-calibrated transducer factors. Chase calibrate each emCell using an isotropic field sensor and in-house calibration software. Some EMC test cells include an isotropic sensor in the feedback loop to linearise cell response, using a combination of calibration factors and real-time measurements.