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Fig. 3: Viewing captured data in the Signal Suite software. Distributed systems The R4000 backend system also allows distributed operation over different locations, supporting multiple sensors and multiple users. This means that it is possible to install the sensor at remote locations while data processing and visualisation TEST & MEASUREMENT happens at a central command post – even with unreliable or slow network connections. All signals are recorded and cached at the remote location. Users or software modules request a preview of areas of interest. A variety of compression algorithms reduce the amount of data that needs to be transferred to the central command location, and users can configure the trade off between quality and speed. Should the network go down, access to the sensor will be temporarily unavailable, but the remote storage system will continue recording and store all signals for later analysis. If the full content of a signal is needed, it can be compressed with configurable quality and transferred to the central location, possibly during times of low network use. Conclusion Many organisations have a need to monitor, analyse and store radio signals. With bandwidths growing, and the number of devices to be monitored also increasing, this creates a requirement for equipment that can capture wideband signals, and can deal with the large amount of data created. With suitable integration of hardware and software, it’s now possible to meet this challenge, and to provide a user-friendly, cost-effective solution that meets the needs of government regulators and other bodies. 800W high-voltage programmable DC power supply TDK’s 800W model in the TDK-Lambda Z+ series of high voltage programmable DC power supplies is offered with output voltages of up to 160, 320 or 650 Vdc (as well as an additional model offering up to 375 Vdc), addressing the requirements for applications such as deposition processes, ROVs, ATE systems as well as general laboratory and industrial use. This unit achieves efficiencies up to 89% and carries a 5-year warranty. All units in the Z+ range can operate in either constant current or constant voltage modes and accept a universal (85-265 Vac) input. For higher power systems, such as those used in test or simulation applications, up to six units can be connected in parallel in a master-slave configuration. To increase the output voltage or to provide a bipolar output, two identical units may be connected in series with external diodes. All models can be programmed via the front panel or remotely by using the built-in USB, RS232 / RS485 or analogue control interfaces. Optional LAN, GPIB (IEEE488) and isolated analogue programming interfaces are also available. CE marked for EMC and in accordance with the LV (low voltage) and RoHS Directives, the Z+ high voltage series conforms to EN55022/EN55024, as well as IEC/EN61326-1 for conducted (FCC part-15-B and VCCI-B) and radiated (FCC part-15-A and VCCI-A) EMI. Safety approvals include UL/EN/ IEC61010-1, and the Z+ high voltage series is designed to meet UL/EN60950-1. TDK-Lambda www.uk.tdk-lambda.com/zplus Passive oscilloscope probes tolerate temperature testing Model 702902 and 702906 from Yokogawa are 10:1 passive oscilloscope probes that operate over a wide temperature range from -40°C to +85°C, and are suited to use in accelerated testing and validation methods where temperature cycling is part of the test procedure. The 702902 is designed for use with the isolated BNC input modules of Yokogawa’s DL850E ScopeCorder family, whereas the 702906 is intended to be used with the non-isolated BNC inputs of the Yokogawa DLM4000 and DLM2000 Series of oscilloscopes. The probes are fitted with long (2.5 m) cables, keeping the measuring instrument away from the high temperature measurement point. Longer probes are also required to connect the measuring instrument to a temperature-controlled chamber. To ensure reliability under severe environmental conditions, these probes have been proved to withstand a cable mount pulling force of 60 N, and have been tested over 500 temperature cycles. In addition to supporting isolated and nonisolated inputs, these probes can also be used with a range of probe tip conversion adaptors to connect the probe to the application in the most convenient way. The choice of adaptors includes safety mini clips, fork terminal adapters, small or large alligator clips, and 4 mm conversion adaptors with pincher tip or safety banana connectors. Typical applications include accelerated testing and validation of automotive parts and designs inside a temperature chamber and the environmental testing of power converters designed for outside installations such as the inverters and transformers used for solar photovoltaic and wind-turbine power generation. Yokogawa http://tmi.yokocms.com 30 Electronic Engineering Times Europe December 2014 www.electronics-eetimes.com


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