Cleveland, Ohio – October 17, 2006 - Keithley Instruments, Inc. (NYSE:KEI), a leader in solutions for emerging measurement needs, announces the release of the Model 3500 Portable RF Power Meter, the first lab-quality, handheld RF power meter on the market. Designed to make RF power measurements in both field and R&D lab environments, the compact Model 3500 provides the accuracy of a benchtop RF power meter with the convenience of a portable instrument at half the cost of competing products. With its features and very attractive price, the Model 3500 truly redefines superior value. The Model 3500 is an important addition to Keithley’s expanding family of RF test and measurement solutions, which also includes the Model 2910 Vector Signal Generator and Model 2810 Vector Signal Analyzer. Visit http://www.keithley.com/pr/062 to learn more. With a wide frequency range of 10MHz to 6GHz, the Model 3500 is useful in a variety of applications, including test of mobile phone and cellular infrastructures, WLAN devices, RFID readers, WiMax devices, and wireless sensors. Its large dynamic range of -63dBM to +20dBM enables the Model 3500 to measure signals either directly from the device under test or through layers of cabling and fixtures. A built-in power sensor eliminates the need for users to carry both an instrument and a separate sensor module. An internal power reference enables self-calibration and eliminates the need for users to perform an independent calibration. The Model 3500 makes lab quality RF measurements quickly and easily. Its absolute accuracy, as good as +/-0.21dB, enables more precise characterization of devices, tighter test limits, and more accurate fixture calibration. In the lab, the Model 3500 can be used as an RF power datalogger. Using normal or high-speed mode, it easily captures and transfers data to a personal computer through its built-in USB interface, allowing for trend or drift analysis. In addition, a number of averaging values can be used when the measured signal varies significantly with time. Despite its small package, the Model 3500 provides outstanding accuracy on the bench, replacing much larger and more expensive instrumentation....