Abstract: A two-axis measurement system for use with an article under test (AUT) is provided with a thermal control system to maintain the measurement system at a stable temperature. The thermal control system may be use a temperature-controlled fluid, such as liquid or gas, conducted through the measurement system. The measurement system further comprises a field probing sensor that is adapted to be positioned at a plurality of points spaced from the AUT to perform a measurement of the AUT. The probing sensor is manipulated by at least a first member extending in a first axial direction and a second member extending in a second axial direction perpendicular to the first axial direction. A near-field measurement of the AUT is performed by moving the field probing sensor in a pattern in front of the AUT to sample the RF energy of the AUT at a plurality of points. Internal passageways provided through the first and second members permit communication of the temperature-controlled fluid therethrough.

Abstract: A two-axis measurement system includes a structural support frame having at least two horizontally disposed parallel rails defining a length of the structural support frame at opposite sides thereof. The support frame further defines a test space between the opposite sides. A bridge extends perpendicularly between the rails and is capable of controlled movement along the rails over the length of the structural support frame. A first probe carriage carried by the bridge permits controlled movement along a span of the bridge. A vertical tower is coupled to the bridge orthogonally with the rails, and a second probe carriage is carried by the vertical tower permitting controlled movement along a height of the vertical tower. The first probe carriage is selectively moveable within a horizontal test plane defined in a first axial dimension by the rails and in a second axial dimension by the bridge by cooperative movement of the bridge and the first probe carriage.

Abstract: An active noise reduction headset including a headband and at least one earcup secured thereto. A microphone is mounted within the earcup for detecting and transducing acoustic pressure within the earcup to a corresponding microphone electronic signal. An electronic signal processing unit is mounted within the earcup and coupled with the microphone for generating an anti-noise signal from the microphone electronic signal. A first speaker is mounted within the earcup for receiving and acoustically reproducing an electronic anti-noise signal from the electronic signal processing unit. A second speaker is mounted within the earcup for receiving and acoustically reproducing an electronic communication signal.