What type of operating feature does a 32/128 phased-array instrument typically support?

The correct choice highlights that a 32/128 phased-array instrument is designed to support multiple element configurations. This is fundamental to how phased array technology operates, as it utilizes an array of elements (in this case, 32 transmitting and 128 receiving elements) to allow for complex signal processing and beam steering capabilities.

By employing multiple element configurations, the instrument can create and manipulate ultrasonic beams in various ways, improving inspection capabilities. This allows for more comprehensive evaluation of materials and structures since it enables a finer control over the direction and focus of the acoustic waves, making it possible to inspect various parts of a component simultaneously and reducing inspection times.

The other options do not align with the functionality of a phased-array instrument. Single-element probes are not utilized in this context as they do not take advantage of the advanced capabilities offered by multiple element configurations. The mention of analogue signal processing only is not accurate since modern phased-array systems typically incorporate digital signal processing to enhance performance and allow for more sophisticated analysis. The option "none of the above" also fails because the correct characteristic is present in the available choices.