Frequency converter drives 0 to 5V output.

Accepting inputs of up to 2 kHz, the Model 8510 frequency-to-analog converter delivers a linear 0 to 5V output for controlling such devices as proportional valves or motors. Specifications include a resolution of 2.5 mV/Hz, linearity of ±0.02%, and accuracy to within ±0.15% maximum. The response time of the converter is 400 msec and it works with output loads of up to 5 mA. The unit mounts on DIN rails and costs $105. Calex Mfg Co Inc, Concord, CA. (510) 687-4411.

Card supplies 8-channel relay output.

Intended for portable and desktop PC-based data acquisition systems, the DBK25 card provides eight independent relay outputs rated for 2A at 28V dc and 0.6A at 120V ac. The miniature latch relays draw power only when changing state. Each of the DBK25's relay contact channels provides a channel-to-channel isolation of 150V and channel-to-system isolation of 250V. The DBK25 works with the vendor's Daq PCMCIA, DaqBook, and DaqBoard data acquisition products and costs $295. IOtech Inc, Cleveland, OH. (216) 439-4091.

Embedded VXI controllers employ Pentium processors.

A family of C-size embedded VXI controllers offers a choice of Pentium processors running at 100 or 133 MHz, and a PCI-based local bus design to accommodate interchangeable daughterboards. The VXIpc-850 series is fully VXI plug-and-play compliant and works with PC-compatible software tools; LabView and LabWindows/CVI application software; and NI-VXI, NI-VTL, and NI-488.2 bus interface software. Units come with an 800-Mbyte internal IDE hard drive and up to 80 Mbytes of DRAM. The front panel has connectors for an SVGA monitor, IEEE 488 interface, serial and parallel ports, SCSI-2, and Ethernet 10BaseT. Respective prices for the 100- and 133-MHz versions of the VXIpc-850 are $8995 and $11,995. National Instruments, Austin, TX. (512) 794-0100.

Intelligent probes ease DSO measurements.

Two oscilloscope probes, the P5205 high-voltage differential probe and the TCP202 ac/dc probe, come with an intelligent TekProbe interface, which eliminates the need for an external power supply or control interface. When you use the probes with the TDS 500B and TDS 700A digital storage oscilloscopes (DSOs), the probes provide direct, correctly scaled measurement and display of differential voltage, current, and instantaneous power. Waveforms are annotated with the numerical value and unit of measure. The P5205 has a 100-MHz bandwidth and tip-to-tip differential voltage rating of 1300V and ±1000V tip-to-ground. The TCP202 measures currents with frequencies from dc to 50 MHz and as high as 15A. Respective prices for the P5205 and TCP202 are $895 and $1320. Tektronix Measurement Business Division, Pittsfield, MA. (800) 426-2200.

Drawing tools join technical-math software.

The vendor is bundling Visio Corp.'s Visio Express software with Mathcad 6.0 and 6.0 Plus technical-calculation software. With access to Visio's drawing and diagramming tools, you can integrate technical illustrations in Mathcad documents, along with calculations, text, and graphs. Simply drag and drop Visio SmartShapes from the software's wide range of electronic stencils. Mathcad 6.0 and 6.0 Plus cost $129.95 and $349.95, respectively, including Visio Express. Users of Mathcad can order a copy of Visio Express from the vendor's World Wide Web site at http:// www.mathsoft.com. MathSoft Inc, Cambridge, MA. (617) 577-1017.

Analog I/O board streams data across PCI bus.

The PCI-416 series of PCI-based analog I/O boards starts with a basic carrier board having a pluggable analog front-end module that yields 12- or 14-bit resolution, sampling rates as high as 10M samples/sec, and as many as 16 single-ended input channels. Some versions offer simultaneous sampling of all channels. You can use the PCI-416 series for high-speed, nonstop streaming of A/D data to memory, disk, or tape. It moves two A/D words in each 32-bit PCI bus transfer. In DMA burst mode, typical PCI transfers occur at 16M samples/sec. Prices start at $2095 for a 12-bit, 2M-sample/sec board. Datel Inc, Mansfield, MA. (508) 339-3000.

PC/104 card simplifies sensor processing.

An eight-channel analog subsystem acquires sensor data for any PC/104-based system. The on-board CPU of the PCM-518 performs all data acquisition control and preprocesses the data to reduce software overhead for the host CPU. Each differential channel provides 16-bit resolution and can be individually programmed for a different sensor type. The PCM-518 comes with QuickSense, a menu-driven test and calibration program that runs on any PC-compatible single-board computer. The board costs $595. WinSystems Inc, Arlington, TX. (817) 274-7553.

Program tests Windows applications.

WinVue automates the quality-assurance testing of Windows applications throughout the development cycle. The program records the application and then automatically creates test scripts. The WinVue suite manager organizes modular test scripts into sophisticated test suites. A dedicated scripting language lets you customize the recorded test scripts. Prices start at $2495 for a single-seat license. Performance Awareness Corp, Raleigh, NC. (919) 870-8800.

PC-based scopes make differential measurements.

Occupying a single PC/AT expansion slot, the PCI-411 and PCI-412 differential input oscilloscopes provide a 1-MHz bandwidth and real-time sample rates of 12.5M samples/sec. Each board has one channel. The PCI-411 has seven vertical ranges from 10 mV/div to 1V/div, while the PCI-412 offers seven vertical ranges from 50 mV/div to 5V/div. BenchCom software, which is bundled with the scopes, lets you control several oscilloscopes in a multichannel test system. Both models cost $1495 each. PC Instruments Inc, Twinsburg, OH. (216) 487-0220.

4-, 8-pole filters operate from batteries.

With option BK-330, the Model 3362 4-pole (24-dB/octave) and Model 3382 8-pole (48-dB/octave) filters can operate from internal rechargeable Ni-Cd batteries, a 12V car battery, or any 10 to 14V dc source capable of delivering up to 1A. Both the 3362 and the 3382 have tunable frequency ranges of 0.1 Hz to 200 kHz (0.005 Hz optionally), and each channel offers selectable low- or high-pass filtering, an input gain from 0 to 50 dB in 10- dB steps, an output gain to 20 dB in 0.1-dB steps, and Butterworth or Bessel frequency-response characteristics. Respective prices for the Model 3362 and 3382 are $1600 and $1950. Battery option BK-330 costs $500. Krohn-Hite Corp, Avon, MA. (508) 580-1660.