| CPC G06F 3/04847 (2013.01) [G01R 35/005 (2013.01)] | 20 Claims |

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1. A calibrator, comprising:
an output terminal configured to output an electrical signal;
a light indicator positioned in association with the output terminal and configured to emit light;
a display configured to present a graphical indication associated with an electrical quantity of the electrical signal; and
a controller configured to:
synchronize a color of the graphical indication with a color emitted by the light indicator;
cause the display to present, together with the graphical indication associated with the electrical quantity, a first graphical user interface (GUI) element that is selectable by a user and indicative of a first signal type of the electrical signal;
in response to user selection of the first GUI element, cause the display to display a plurality of GUI elements;
receive user selection of a second GUI element of the plurality of GUI elements, the second GUI element being indicative of a second signal type different than the first signal type; and
in response to receiving the user selection of the second GUI element,
change a signal type of the electrical signal from the first signal type to the second signal type; and
cause the output terminal to output the electrical signal having the second signal type.
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