The manufacturer National Instruments has numerous series organized by the type of instrument, one of which is the C Series. This series is comprised of Voltage Output Modules, Universal Analog Input Modules, CAN Interface Modules, Digital Modules, Current Output Modules, Counter Input Modules, Temperature Input Modules, Current Input Modules, Digitizer Modules, Voltage and Current Input Modules, Sound and Vibration Input Modules, Strain/Bridge Input Modules, LIN Interface Modules, Voltage Input Modules, Relay Output Modules, and more. It is also worth noting that several specifications for a C Series system are determined by the modules and other specifications are determined by the backplane. Other specifications can even be based on the configuration of the system. The NI C Series is designed for the CompactDAQ and CompactRIO platforms.
National Instruments manufactures a variety of products, including several types of data acquisition or DAQ devices. These include affordable singular DAQ devices with a minimal channel count, modular DAQ devices with a medium channel count, and modular DAQ systems with a high channel count. These devices are created for several platforms and buses, such as CompactDAQ, CompactRIO, PXI, PXI Express, PCI, and PCI Express. DAQ devices measure an electrical or physical spectacle like the voltage, temperature, current, sound, or pressure via a computer.
To prevent interference on receiving apparatus, for example, audio and TV receivers or computer systems, signals generated in the line supply and the radiated electromagnetic field of radio frequency from electrical equipment may not exceed certain limits. For this, the IEC makes recommendations. A special committee of the IEC, the CISPR (International Special Committee on Radio Interference), has published several definitions concerning measuring sets and measurement procedures for the various types of interference-producing equipment.
The 15-MHz portable dual-trace oscilloscope Philips PM 3226 is a compact, lightweight instrument featuring simplicity of operation, for a wide range of use in servicing, research, and educational applications. Other features include provision for chopped or alternate display of Y signals, automatic triggering, mains triggering, and triggering on the line and frame sync pulses of a television signal. The cathode-ray tube displays a useful screen area calibrated into 8 x 10 divisions by an external graticule.