Cleveland, Ohio – October 9, 2007 - Keithley Instruments, Inc. (NYSE:KEI), a leader in solutions for emerging measurement needs, has released the industry’s leading 4X4 MIMO (multiple-input, multiple-output) RF test system for R&D and production testing of next generation RF communications equipment and devices. Keithley’s MIMO RF test system consists of its new Model 2920 Vector Signal Generator (VSG) and Model 2820 Vector Signal Analyzer (VSA), Model 2895 MIMO Synchronization Unit, and powerful MIMO Signal Analysis Software. No other MIMO test system in the industry offers: - support for 4X4 MIMO applications - support for a multitude of commercial standards, including cellular, WiMAX, and WLAN - +/-1 nanosecond signal sampler synchronization - less then 1 nanosecond peak-to-peak signal sampler jitter - less than 1 degree of peak-to-peak RF-carrier phase jitter. By allowing for tight multi-unit synchronization with these high performance measurement specifications, the new Keithley system can support MIMO measurements on demanding signals such as 802.11n 40MHz WLAN MIMO and 802.16e Wave 2 Mobile WiMAX. For more information on Keithley’s MIMO RF test solution, visit MIMO is a growing technology that uses multiple radios for both transmitting and receiving data. In RF communication devices, it increases data throughput rates without the need for additional bandwidth. Keithley’s 4X4 MIMO test capability provides the most advanced, high performance MIMO testing platform available for future product development with the ability to test the most complex signal structures, including WiMAX Wave 2 and 4G LTE (long term evolution) and UMB (ultra mobile broadband), with a simple software upgrade. Highly Accurate and Repeatable Measurements up to 6GHz Forming the core of Keithley’s MIMO RF test solution is a new RF signal generator and an RF signal analyzer that support expanded frequency ranges to 6GHz. The latest addition to Keithley’s growing RF product line is the Model 2920 Vector Signal Generator. The Model 2920 is available in two configurations with maximum frequencies of 4GHz or 6GHz and can generate signals as low as 10MHz. An optional 80MHz arbitrary waveform generator bandwidth with 100MSamples of waveform memory gives users the capability of testing a vast array of commercial communications signals, including GSM, EDGE, W-CDMA, cdma2000, SISO WLAN, and the industry’s most demanding 802.11n 40MHz WLAN MIMO signal. Keithley’s new Model 2820 Vector Signal Analyzer comes with 40MHz of bandwidth as standard in either a 4GHz or 6GHz configuration. The Model 2820 is highly versatile and can test a range of signals, including GSM, EDGE, W-CDMA (uplink/downlink), and cdma2000, along with a multitude of WLAN signals, including the 802.11n 40MHz WLAN MIMO signal in both MIMO and SISO configurations. The tight synchronization of signals and low sampler and RF carrier phase jitter featured in Keithley’s MIMO RF test solution allow for highly accurate and repeatable measurements that ensure high product quality and high production yields. In addition, the Model 2820 and Model 2920 can be set up in 2-, 3-, or 4-channel configurations. These dual-purpose instruments can be used either as standalone instruments or as part of a 4X4 MIMO test system, so users don’t need to dedicate individual signal analyzer or signal generator units to a task.