The analog output signal is voltage output corresponding to the parameter measured by a device. The produced signal is calibrated by a scaling factor.

Amplitude shading is a method of reducing the side lobe levels in a transducer array. The shading usually causes the main beam to broaden by applying different voltages to the elements of the array.

See also Analog Output Signal.

(TVR) The transmit voltage response is the level of the acoustic output referenced to one meter per one volt input.

See also Transmit Current Response, Doppler Velocity Signal, Analog Output Signal, and Digital to Analog Converter.

(ADC) A system that receives analog input data and produces digital values at its output. Analog to digital converters are used by the ultrasound scanner to convert the received signal into a format more compatible with the computer systems.
Ultrasound front-end-systems as well as many others sophisticated electronic systems use these analog signal processing components in connection with e.g., low-noise amplifier (LNA), and time gain compensation amplifier (TGC) as key elements in determining the overall system performance.

See also Digital to Analog Converter, and Digitization.

Biological flows vary throughout the cardiac cycle. The analog output can be filtered to give a pulsatile flow or mean flow signal.