The VIA Echo MRI is an Ultra Low-Magnetic Network Analyzer that accurately measures impedances from 2 to 2000 Ohms, resistance, phase angle, X, Q, return loss, and SWR. The Echo MRI can simultaneously provide graphical display for any two measurement parameters and a digital display of a third parameter. The frequency sweep is plotted in the X axis and independent left and right Y axis scales are user selectable The Echo MRI has the ability to function in close proximity to high magnetic fields making it the ideal test instrument for installing and servicing MRI or NMR systems