A handy gadget for CMRR and SYMMETRY trimming and general characteristic testing (such as frequency response) of 500 or any other type of module/gear.

The jig is mainly designed to facilitate the use of unbalanced test equipment in balanced environment. In its basic form it converts unbalanced input of a measuring equipment (AC meter, DMM, Oscilloscope etc.) and unbalanced output of a signal generator to balanced operation. It also has a simple PHASE switch for checking signal polarity.