The DM44 is a digital multimeter, added to the top of the 464, 465, 466, or 475 oscilloscope. This digital multimeter measures dc voltage, resistance, temperature, differential delay time (time between any 2 points on the oscilloscope trace), and reciprocal time (frequency if the period of one repetition is measured). The digital multimeter front panel contains the readout display, and function and range controls. Input terminals are located on the left side of the multimeter. The readout is a 3½ digit display using five 7-segment light-emitting diode displays. The decimal point is automatically positioned. Negative polarity indication is also automatic. A blinking display indicates an overrange condition.