Вопрос № 605439 - Английский язык

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The ML9927 semiconductor laser works in the 1.55 µm band, produces a single wavelength and transmits to points 100 km away. The laser will work in advanced optical communication networks that transmit data at 2.5 Gbps. In constructing the device, the engineers applied a multiple layer quantum well (MQW) structure to the active layer of the lightemitting section, using an optimum number of quantum wells. By limiting the wavelength modulation to 0.3 nm during signal modulation at 2.5 Gbps the ML9927 achieves long-distance transmission up to 100 km. Previously, the longest possible distance was 30 km at a 1nm wavelength modulation. Tests of the product show a service life at 50˚C of 100,000 hours (about 12 years).
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The laser will work in advanced optical communication networks that transmit _________________.

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1_______. The laser medium can be a solid, gas, liquid or semiconductor.
2_______. A ruby laser is a solid-state laser which emits at a wavelength of 694 nm. Other lasing mediums can be selected based on the desired emission wavelength, power needed and pulse duration. 3_______. The reason that CO2 laser is so dangerous is because it emits laser light in the infrared and microwave region of the spectrum. 4_______.

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Omeg Ltd is launching two 360˚ servo potentiometers with life spans greater than 10 million cycles – a ten-fold increase on the company’s standard design carbon track rotary potentiometers. Long life results from a new flush bonding technique for producing the resistance tracks. This process uses a polymer based conductive plastic ink which is bonded at high temperature and pressure to an epoxy substrate to produce tracks that are hard wearing and have a mirror-like finish. The potentiometers are specifically designed for industrial control applications such as servo positioning, where high speed reversals of direction or vibration are encountered.
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Long life results from a new flush bonding technique for producing ________.

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An auto-tune beacon receiver that automatically finds the strongest beacon station transmitting DGPS error corrections and locks onto it in seconds. The receiver works automatically with all Army Corps of Engineers DGPS beacon broadcasts transmitting in the Type 9 message format, as well as all international beacon systems.
A combined GPS/beacon also available as an option, eliminating the need for separate antennas, cables and external grounding. This H-field ferrite loop antenna provides improved signal reception under poor atmospheric conditions. The unit is waterproof and can be installed in an open cockpit or fly bridge. It has a large easy-to-read screen with simple menu-driven operation. The screen has been upgraded with a transflective LCD.
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H-field ferrite loop antenna provides improved signal reception under ________.

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For use in medical instruments, factory automation and industrial-use endoscopes, the ultra-miniature color camera includes a camera head the size of a person’s little finger, and employs a digital process. Adopting an internal and external synchronous system, the camera links the head section and control unit through a dedicated cable. It uses a built-in, 330,000-pixel, 1/3-inch CCD with a chip-on-lens structure, and this plus the built-in digital processor results in excellent image quality. The horizontal resolution shows 430 TV lines, the sensitivity reaches 15 lux, and the ratio stands at 46 dB.
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The horizontal resolution shows ________.

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Data collector has an antenna built right into the palmsized unit. It has also 12 keys and uses a point and shoots menu-driven approach. The collector is designed for GIS and CAD users who need an automated field mapping tool in an easy-to-use package. Users can link multilayer GIS data to carefully pinpointed geographic positions. The GPS receiver is an 8-channel, continuous-tracking receiver providing 1-5 metre accuracy, real-time or postprocessed. As soon as the satellites are acquired, position updates are available once a second. The Graphic User Interface (GUI) takes advantages of an 8-line by 21-character LCD which also supports 64 × 128 pixel graphics. One or more GPS coordinates, as well as multiple attributes and values, can be attached to each feature as it is collected in the field.
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The collector is designed for GIS and CAD users who ________.