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Little Wi-Spy Scout

30.06.2006

The young company MetaGeek (Idaho, USA) has released the world's smallest and most inexpensive spectrum analyzer.

Wi-Spy is no bigger than a USB storage device, weighing just 8g and costing less than $5, 100 times less than the nearest competitor. The spectrum analyzer can find noise-free portions of the spectrum in the frequency range from 40 to 2 GHz and solve problems associated with cordless phones, Bluetooth and ZigBee devices, 4b/g networks, and other wireless systems that use this frequency range. .

The analyzer with built-in antenna and trigger connects to a USB 1.1 or 2.0 port on a Windows, Linux, or Mac host computer and scans the entire operating frequency range in 96 ms at 1 MHz and 1 dBm resolution. The control and display software is supplied with the analyzer and provides a spectral display of the measured data in various coordinates (amplitude, frequency, time).

Other features of the device include analysis of the average, maximum and current signal level; frequency and amplitude markers; viewing the amplitude of Wi-Fi channels; recording and playback; copying and printing of measured data.

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Random news from the Archive

liquid lens 05.06.2004

The Dutch firm "Philips" has created a zoom lens based on the property of an oil drop to spread or concentrate under the influence of an electrical voltage.

Previously, Philips used the same effect, but on a miniature scale, to create a paper-thin television screen. A drop of aqueous electrolyte and a drop of oil are placed in a glass cylinder. Liquids do not mix; a flat interface appears between them. But it is worth applying tension to the ends of the cylinder, as a drop of oil bends, turning into a convex lens.

When the poles are reversed, the oil recedes, forming a concave surface. By smoothly changing the voltage and its sign, it is possible to obtain lenses with different focal lengths - from 50 millimeters to infinity (when the interface between oil and water is flat). Switching across the entire zoom range takes less than ten milliseconds.

Such a lens is useful for digital cameras built into cell phones. It can also be used in medical endoscopes, as well as in laser DVD players for focusing the reading beam on different layers of the disc.

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