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Putting OpenVPX To Work

Before the advent of OpenVPX, designers of embedded systems took advantage of the extreme connectivity offered by VPX (VITA 46), but were faced with a virtually unlimited number of possible implementations. Specific choices for the control and data channel assignments for each slot, the backplane connectivity, and serial fabrics were often made somewhat arbitrarily to suit the particular needs of the current system. Although following the general framework of VITA 46, each system tended to be so unique that the boards and backplanes designed for one system were seldom usable in other systems, even from the same vendor.

Posted in: Articles, Open VPX, Articles, Electronics & Computers, Architecture, Embedded software, Radio equipment, Switches
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Moving From System Specification to Software Development

Systems engineering is not about developing electronics, mechanical, or software designs. Systems engineering is really about four things:

Posted in: Application Briefs, Application Briefs, Electronics & Computers, Design processes, Architecture, Computer software / hardware, Product development, Systems engineering
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Testing DC Power Systems

DC is not always DC. When systems are developed to operate on DC power, the DC electrical environment will have noise and may experience other disturbances. This article will explore considerations for generating low frequency disturbances (glitches, sags, surges, spikes) that occur in the 100 microsecond and longer region with bandwidths of 10 kHz or less. In contrast, noise, which is outside of the scope of this article, can be low frequency (like 50/60 Hz hum) but becomes a challenge to generate in range from kHz, to MHz or up to the GHz range.

Posted in: Application Briefs, Application Briefs, Electronics & Computers, Electric power, Test equipment and instrumentation, Test procedures
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Frequency Synthesizer

Phase Matrix (San Jose, CA) offers the 20 GHz QuickSynTM microwave synthesizer that covers the 0.5- to 20-GHz frequency range (extendable down to 0.2 GHz) with 0.001-Hz resolution. The product provides major modulation capabilities (AM, FM, phase, and pulse), power leveling and control, frequency and power sweep, list mode, and other functions.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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Optical Wire and Grids

Dontech (Doylestown, PA) offers optical fine wire (OFW) and micro EMI-mesh (MEM100) conductive optical grids that provide EMI/RFI shielding of electronic displays, instrumentation, and enclosures. The OFW mesh is constructed of woven and conductively plated fine-wire stainless steel and copper; the MEM100 series is made of etched and blackened copper. The optical grids are suitable for use in military and aircraft applications, medical and industrial displays, rugged computers, communication systems, and test equipment. Grid counts typically range from 50 to 255 openings per inch (opi). Standard unplated wire width/diameter for most mesh counts is 0.0011" and 0.0022" for woven, and 0.0005" for etched mesh. The grids are typically embedded in glass or plastic substrates such as acrylic, polycarbonate, polyester (PET), or triacetate (TAC).

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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RF Module

RF Monolithics (Dallas, TX) has introduced the XDM2510H, an RF module built on the Dust Networks® IA-510(H)™ WirelessHART® system. The module provides a UART serial port for connection to sensors and an RF connector for antenna connection. With module certifications in the USA, Canada, and pending in Europe, no type acceptance testing is required of the OEMs' end products. The module allows connection either locally or anywhere across the Internet.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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Power Amplifier

The Model KMS2010 solid-state power amplifier module from AR Modular RF (Bothell, WA) covers the 1.75 to 1.85 GHz frequency range with 150 Watts of power, and is suitable for the wireless broadband network. This 52-dBm linear power amplifier offers a scalable gain of 57 dB and is designed to meet most communication protocols, including various types of OFDM. The module comprises a printed circuit board housed in a machined aluminum enclosure. The amplifier is protected from thermal overload, over-power, over-voltage, or wrong voltage polarity, and includes an internal isolator.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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Reference Oscillator

Crystek (Fort Myers, FL) has introduced the RF Pocket Reference Oscillator (RFPRO Series), a frequency control product that integrates a complete True SineWave SAW (surface acoustic wave) oscillator in a rugged SMA housing. Connecting the device’s female SMA side to 3.3 Vdc will output a -135 dBc/Hz phase noise signal at 10 Khz offset. The oscillator offers a frequency stability of ±150 ppm over -20 to 70 °C (operating temperature ranges from -40 to 85 °C). It is available in 500 MHz and 1 GHz output frequencies.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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Power Supply Capacitors

Spectrum Advanced Specialty Products (Fairview, PA) offers Switch Mode Power (SMP) Supply capacitors with MIL-PRF-49470

approval for military QPL offerings. Designed to withstand temperatures ranging from -55 to 125 °C, the capacitors function with capacitance of up to 70 μF, with tolerances of 5, 10, or 20%, and are offered in through-hole or surface-mount leaded configurations of N, J, or L. BP, BX, BR, or BQ ceramics are available and able to withstand voltages ranging from 50 to 500 VDC.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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Gain Antennas

The OM series of gain antennas from Antenna Factor (Merlin, OR) is designed to increase the range and reliability of wireless links, while maintaining omnidirectional pattern around the circumference of the antenna. The antennas feature rugged, weatherized construction for both indoor and outdoor applications. Complete mounting hardware is included for standard masts. The standard antenna features 7 dBi gain; higher-gain versions are available.

Posted in: Products, RF & Microwave Technology, RFM Catchall, RF & Microwave Electronics
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