- Buyers Guide
Compact Interference Generators
The models UCS500M/2 and UCS500M/4 compact interference generators offer full-compliance testing to six specifications for immunity, including IEC 1000-4-2, 4-4, 4-5, 4-8, 4-9 and 4-11. Testing is accomplished via technology that integrates waveforms using a built-in coupling/decoupling network. The UCS500M/2 and UCS500M/4 test to 2500 and 4400 V, respectively. Both units are available without electrostatic discharge testing capability. Size: 19.00" x 5.25" x 21.00".
Amplifier Research (AR),
9 kHz - 21 GHz Spectrum Analyzer
The model MS2665C spectrum analyzer operates from 9 kHz to 21 GHz and is designed to analyze signals used in point-to-point and point-to-multipoint microwave radio networks. The unit features one-touch measurement functions and built-in measurement capabilities, including channel power, adjacent channel power, occupied bandwidth, C/N and noise power. Phase noise performance is £ -100 dBc/Hz at 1 GHz and £ -94 dBc/Hz at 21 GHz. Noise floor performance is £ -115 dBm at 1 GHz and £ -98 dBm at 21 GHz. Standard resolution bandwidth is 1 kHz to 3 MHz and bandwidths of 30, 100 and 300 Hz can be added as an option. Maximum dynamic range is 110 dB. Price: $25,000.
(800) 267-4878 or (972) 644-1777.
GPIB-Programmable Bench-top Power Supplies
The models 1770, 1775 and 1780 bench-top programmable power supplies can be regulated via the IEEE488.1 general-purpose interface bus (GPIB) programming interface or the front-panel keypad. The three new power supplies feature a three-year warranty and a wide voltage range. The model 1780 offers dual output with voltage ranges of 0 to 18 V DC, DC current of 0 to 4 A and total power of 144 W. The model 1775 also offers dual output with voltage ranges from 0 to 35 V DC, DC current of 0 to 2 A and total power of 140 W. The model 1770 offers a voltage selection from 0 to 17.5 V DC or 0 to 35 V DC, DC current from 0 to 6 A or 0 to 3 A and total power of 105 W. All units provide 12-bit digital-to-analog converter accuracy. Prices: range from $950 to $1350.
B&K Precision, Ò
Broadband Material Measurement Setup
The model M07T two-port 7 mm platform is designed to measure m and e of solid materials up to 20 GHz. The unit is furnished with a clam shell sample holder (to ensure good sample-conductor contact), calibration standards, loading aids and other accessories. The platform is available as a powder compactor and liquid cell. Instrument control of common analyzers and data processing is provided by the company's MU-EPSLN software package for materials characterization in several one- and two-port arrangements.
Low Current Matrix Switch
The model 7174A 8 x 12 low current switching card is designed for use in the company's model 707 six-slot switch system and model 708 single-slot switch system. The card is optimized for high performance switching of semiconductor I-V and C-V signals. The unit's space-saving design offers eight low current, high performance pathways and uses air as an insulator. Any pathway in the 8 x 12 array will settle to less than 0.4 pA in less than 2.5 s after a 10 V step is applied. Relay settling time is less than 1 ms. The card features a two-pole form A contact configuration and can switch a wide range of signals with signal capacities of 200 V and 2 A. Each channel has an offset current less than 10 fA (typ) with 0 V applied to inputs and outputs. Bandwidth at 3 dB is 30 MHz at 50 W load and source, and 40 MHz at 1 mW load and 50 W source. Price: $7995. Delivery: four weeks (ARO).
Keithley Instruments Inc.,
(800) 552-1115 or (440) 248-0400.
Communications Service Monitor
The model CSM-1300 communications service monitor offers an RF generator, three separate tone generators, RF and audio frequency counters, an FM/PM deviation display, a digital oscilloscope, a +/-0.5 ppm TCXO, a digital voltage meter display and a high resolution liquid crystal display. Optional features include a +/-0.03 ppm OCXO reference, numeric/alpha numeric paging, digital 12.5/6.25 kHz bandwidth receiver module, miscellaneous trunking formats, SWR antenna analyzer and Windows software. Price: $6999.95.
Link Communications Inc.,
The model STEL-2276 evaluation board evaluates and tests the model STEL-2176 complete modulator/demodulator application-specific IC (ASIC) for subscriber cable modems. The unit supports 16-/64-/256-quadrature amplitude modulation (QAM) receive modes, as well as quadrature phase-shift keying (QPSK) and 16-QAM transmit modes. Interface points are provided to facilitate bit error rate and performance testing as well as the provision for connection to a PC for software control. The board is supplied with software that provides complete user flexibility for configuring both the transmit and receive portions of the ASIC.
Stanford Telecom, Telecom Component Products Group,