Products
Staff -- Test & Measurement World, 4/1/2003
GHz amplifier goes to 50 W
The compact Model 5143 solid-state power amplifier covers all the major wireless telecom bands, handling signals from 0.7 to 3 GHz. Suitable for component and passive intermodulation testing, the 5.25-in.-tall unit is highly linear and load tolerant and produces as much as 50 W. Other frequency bands are available, including 0.8–2.5 GHz, 0.8–4.2 GHz, and 2–4 GHz. Ophir RF, Los Angeles, CA. 310-306-5556; http://www.ophirrf.com .
Tester measures co-channel interference
Patented technology allows the ClaRiFy system to measure the propagation of GSM or GPRS base station signals even in the presence of strong interference from other base stations. The unit detects the base station identification code of interfering signals and tracks those signals throughout the test. The ID information lets network developers improve network performance through frequency planning. By re-allocating the frequencies, developers can increase the channel capacity of the system. Dynamic Telecommunications, Germantown, MD. 301-5155-0036; http://www.dynatele.com .
Tunable laser powers tests
The 81949A tunable laser is a compact, high-power source for testing optical amplifiers and other active components. The device produces an output power of 13 dBm and features an SBS (stimulated Brillouin scattering) suppression filter that allows high-launch power levels in optical fibers. For wavelength division multiplex systems, the laser offers a tunable wavelength range of 110 nm within the S-, C-, and L-bands. Agilent Technologies, Englewood, CO. 800-452-4844; http://www.agilent.com .
CDMA transmitter handles CW
An optional module for the Crocodile CDMA transmitter allows the unit to transmit a continuous wave (CW) signal for either cellular or PCS applications. The Crocodile can generate 25 to 45 W for cellular applications or 10 to 20 W for PCS. In cellular mode, it simulates 512 base stations with definable PN offsets, produces Pilot I and Q modulation, and offers VSWR protection. Its Class A power amplifier has an adjustable power output with 0.1-dB steps and operates from AC or battery power. The unit has FCC Type acceptance and CE approval. Berkeley Varitronics Systems, Metuchen, NJ. 732-548-3737; http://www.bvsystems.com .
Power splitter module goes to 1 GHz
The SMP6905 power splitter/combiner module for the VXIbus handles the frequency range from 10 MHz to 1 GHz and provides six 2-way ports. The system delivers two outputs of equal amplitude with no phase delay when used as a splitter. As a combiner, it produces the vector sum of the two input signals. VXI Technology, Irvine, CA. 949-955-1894; http://www.vxitech.com .
Tools target WCDMA
Three tools, the Air Access Network Emulator, the Universal Diagnostic Monitor (UDM), and the UMTS Automatic Test System (U-ATM) address the needs of WCDMA mobile-system development. The Air Access emulator uses an active protocol stack to emulate real network performance. The U-ATM works with the emulator to run analysis and characterization test suites, including 3GPP tests. The UDM allows automatic control and data collection for mobile devices based on Qualcomm and PrairieComm chipsets. Spirent Communications, Rockville, MD. 301-417-1224; http://www.spirentcom.com .
