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 and tuning, transmission line testing and 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 Echo can be used to verify components and assemblies the same as equivalent Agilent (old HP) Network Analyzers at a fraction of the cost.

The VIA Bravo product line is a family of general purpose vector impedance analyzers used to measure impedance and resonant frequencies of circuits and antennas from 100 kHz to 200 MHz. VIA Bravo analyzers are available in both single port (S11) and dual port (S11/S21) versions. Applications include Commercial Radio, Aviation, and Radio Frequency Identification (RFID).

The VIA Analyzer is an impedance analyzer for the HF band. The VIA has a frequency range of 100 kHz to 54 MHz. Features include graphical representations of SWR, Return Loss, Impedance, and Resistance.