A radio wave environment display system includes a measurement antenna and a radio wave environment display device. The measurement antenna measures a radio wave intensity of a first radio wave transmitted by the wireless communication service, and performs a scan of radio wave intensities of radio waves including the first radio wave in a target area. The radio wave environment display device includes a processor configured to: select a radio wave intensity of a second radio wave having a frequency the same as or in the vicinity of a frequency of the first radio wave from the radio waves obtained by the scan; and calculate a communication environment of a wireless communication service on the basis of a difference between the radio wave intensity of the first radio wave and the radio wave intensity of the second radio wave.

Disclosed embodiments can pertain to process indicator enhancements. A process indicator can include a dye material that has electrical properties such as conductivity and capacitance that can be employed to determine whether observed conditions are acceptable or not to sterilize medical equipment. Furthermore, the indicators can employ amplification, a specialized antenna, or both to allow signals, such as an electronic property value, to be communicated through sterilization containers that can shield or degrade signals. A number and location of indicators can also be determined and utilized to assist in visual inspection of the indicators as well as automatic evaluation.

Methods, systems, and apparatus, including computer programs stored on a computer-readable storage medium, for obtaining, from an electric field sensor, measurements of a net electric field resulting from a combination of respective electric fields from two or more electrical power conductors that are proximate to the electric field sensor. The apparatus detects a change in successive measurements of the net electric field. The apparatus determines, based on the change, that an electrical fault has occurred in one of the two or more electric power conductors. The apparatus sends to a server system, data indicating that the electrical fault has occurred in one of the two or more electric power conductors.

Methods, systems, and apparatus, including computer programs stored on a computer-readable storage medium, for obtaining, from an electric field sensor, measurements of a net electric field resulting from a combination of respective electric fields from two or more electrical power conductors that are proximate to the electric field sensor. The apparatus detects a change in successive measurements of the net electric field. The apparatus determines, based on the change, that an electrical fault has occurred in one of the two or more electric power conductors. The apparatus sends to a server system, data indicating that the electrical fault has occurred in one of the two or more electric power conductors.

A test system for testing a device under test is provided including at least one feed antenna, a shielded chamber, and at least a first reflector and a second reflector. The test system is a compact antenna test range. The first reflector and the second reflector are arranged inside the shielded chamber. The first reflector is configured and arranged such that it redirects outgoing test signals emitted by the at least one feed antenna towards the second reflector and incoming test signals coming from the second reflector towards the at least one feed antenna. The device under test is arranged outside the shielded chamber. The shielded chamber includes at least a first interface associated with the device under test. The first interface and the feed antenna are located at different sides of the shielded chamber, which are perpendicular to each other.

An information processing apparatus capable of preventing erroneous connection at a time of connection using cables without deteriorating versatility. The information processing apparatus is communicable with an external device via two cables. A first connector is connected to one of the two cables and has terminals, which include a first terminal that is arranged at a first position and receives a predetermined signal output according to start-up of the external device. A second connector of a same shape as the first connector is connected to another of the two cables and that has terminals, which are identical to the terminals of the first connector in number and arrangement and include a second terminal that is not used to output a signal and is arranged at a position corresponding to the first terminal. A controller notifies of an error through a notification device when the second terminal receives the predetermined signal.

A measurement device for measuring performance of at least one antenna system in a first frequency band and in a second frequency band. The measurement device including an outer chamber having inwardly radio frequency reflective walls configured to enclose the antenna system, an inner chamber deployable inside the outer chamber, the inner chamber having radio frequency absorptive walls configured to enclose the antenna system, a first test antenna arrangement arranged inside the outer chamber and configured for a measurement operation in the first frequency band, and a second test antenna arrangement arranged inside the inner chamber and configured for a measurement operation in the second frequency band, thereby enabling measuring performance of the antenna system in a reflective radio frequency environment by the first test antenna arrangement and measuring performance in an essentially anechoic radio frequency environment by the second test antenna arrangement.

A sensor receiver includes a Rydberg cell configured to be exposed to a radio frequency (RF) signal, and a probe source configured to generate a plurality of spaced apart pulsed probe beams within the Rydberg cell. The pulsed probe beams are offset in time from one another. A detector is positioned downstream from the Rydberg cell.

Methods and apparatuses for performing optical inspection of varactor diodes in an antenna are disclosed. In some embodiments, the method of testing an antenna having varactor diodes comprises: selecting a plurality of varactor diodes to be placed in a light emitting state; forward biasing the selected varactor diodes to a magnitude at which the selected varactor diodes are to emit light; and detecting one or more faulty varactor diodes of the selected varactor diodes based on their emitted light intensity.

A sensor receiver may include a Rydberg cell configured to be exposed to a radio frequency (RF) signal, and a probe source configured to generate a plurality of spaced apart pulsed probe beams within the Rydberg cell. The pulsed probe beams may be offset in time from one another. A plurality of excitation sources may be coupled to the Rydberg cell. A detector may be positioned downstream from the Rydberg cell.