A 2-D acoustooptic spectrum analyzer with the associated reference function generator and real-time image processor has been constructed. The operation of the analyzer and the experimental considerations for obtaining a high resolution spectrum in real time are described.

Its wide dynamic range makes the spectrum analyzer the test instrument of choice for measuring harmonic distortion, intermodulation distortion, adjacent channel power ratio, spurious-free dynamic range, gain compression, etc. Distortion measurements such as these are bounded on one side by the noise floor of the spectrum analyzer and on the other side by the signal power strength at which the s...

Here we present and analyze an optical spectrum analyzer at the nanometer scale that is able to distribute different frequency contents of the radiation of an optical dipole source into different directions in the space. The spectrum analyzer is composed of arrays of optical Yagi-Uda nanoantennas, forming relatively narrow radiation patterns operating at different frequencies. The optical Yagi-...

Observations of surface deformation are essential for understanding a wide range of geophysical problems, including earthquakes, volcanoes, landslides, and glaciers. Current geodetic technologies, such as global positioning system (GPS), interferometric synthetic aperture radar (InSAR), borehole and laser strainmeters, are costly and limited in their temporal or spatial resolutions. Here we pre...

 This paper describes a remote-experimentation project that is part of a virtual laboratory (VLab). The activity is organized around a spectrum analyzer and a function generator, as real devices mirrored into Web (Internet) nodes. A logically structured replica of the Advantest spectrum analyzer is realized on a LabVIEW platform, in a client-server approach. The application also integrates sev...

Short Abstract—This paper describes methodologies for exact exposure measurements in the vicinity of modern digital broadband RF transmitters like DVB-T, DAB and UMTS stations. The measurement parameters for the spectrum analyser measurements are derived from the signal characteristics of the RF signals in frequency and time domain. Study designs of present measurement campaigns are also presen...