Press Release Advantest Introduces the Q8331 Multi-Wavelength Meter for DWDM Systems March 12, 2002 Fast and Reliable Simultaneous Measurement of Up to 300 Channels Q8331 TOKYO, Japan, March 6th, 2002 -- Advantest Corporation (TSE: 6857, NYSE: ATE) has announced today that it has begun sales of its Q8331 Multi-Wavelength Meter, which is targeted at the growing market for DWDM (Dense Wavelength Division Multiplexing) backbone and metropolitan area networks. Designed for use in both R&D and production, the Q8331 enables quick and accurate simultaneous measurements of the emission wavelengths and power levels of up to 300 DWDM channels. One of the ways in which optical engineers have been working to respond to the explosive growth in data traffic is by using DWDM to increase the number of transmission channels available within optic fibers. As a result, the latest DWDM systems now possess a capacity of up to 256 such channels. By raising this number, however, engineers are forced to narrow the spacing between adjacent channels, making it easier for neighboring pulses to interfere with each other. Thus, it becomes vital that engineers check and tune the wavelengths and power levels of individual channels to ensure that they are in exact compliance with specifications such as the ITU-T grid-a set of channels that are spaced at a set interval established by the International Telecommunication Union. Fast Measurement Time Combined with Outstanding Usability Building upon the high standard established by the company's previous offering, the Q8331 provides improved measuring accuracy, a faster measurement time of approximately 0.5s (twice the speed of conventional systems), and the ability to simultaneously measure a maximum of 300 channels. Optical engineers will also find that the Q8331 makes it easier to monitor and tune wavelengths because its standard LCD display gives them the choice of viewing either actual wavelength fluctuations or their numerical equivalents. Another feature that will ease the burden of testing is the Q8331's pass-fail function, which will enable users to determine whether channel deviation (also known as drift) and other wavelength characteristics comply with the ITU-T grid-all without having to perform any complicated operations. The Q8331 is also well suited for measuring the gain, or amplification factor, of DWDM optical fiber amplifiers because it has a low gain flatness of +/-0.2dB. Improved Measurement Precision The Q8331 has a measurable wavelength range that runs from 1,270nm to 1,680nm (covering the full applicable wavelength range of current optic fibers) and a measurement accuracy of +/-1ppm, a significant improvement on the +/-2ppm accuracy provided by the company's previous offering. To further ensure measurement precision, the Q8331 has embedded temperature and atmospheric pressure sensors, which monitor changes in the surrounding test environment and compensates wavelength readings accordingly. Main Specifications Measurable Wavelength Range: 1,270nm to 1,680nm Wavelength Accuracy: +/-1ppm (1.5pm @ 1,550nm) Display Resolution: 0.0001nm Channel Power Accuracy: +/-0.5dB (1,310nm, 1,550nm) Detection Sensitivity: -40dBm (1,270nm to 1, 600nm) Max. Input Power: +10dBm Max. No. of Input Channels: 300 Measurement Time: 0.5s (Interval between consecutive measurements) General Specifications: Display - 6.5-inch color liquid crystal display Dimensions - Approx. 424mm (width) x 132mm (height) x 500mm (depth) News

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