Measuring instrument with multiple signal terminals shared in multiple operation modes

A measurement apparatus comprising:

• a plurality of signal processing units contained in a housing and corresponding to a plurality of operation modes concerning a signal processing, respectively;
• an operation panel, a display, and a plurality of signal terminals disposed in the vicinity of the display and shared by said respective signal processing units, which are arranged on a front surface of said housing, respectively;
• a changeover switch circuit, disposed between said plurality of signal terminals and said respective signal processing units, for switching/connecting said plurality of signal terminals to said respective signal processing units;
• a signal name memory, disposed for each of said signal processing units, for storing a signal name of a signal allocated to each of said signal terminals;
• switch circuit control means for switching said changeover switch circuit in response to an operated/inputted operation mode designation to connect said each signal terminal to the signal processing unit corresponding to the designated operation mode;
• and
• signal name display means for reading each signal name corresponding to said designated operation mode from said signal name memory and displaying the signal name in the vicinity of the corresponding signal terminal in a display screen of said display in response to said operation mode designation.