Data Acquisition

so that they interlock. The PAL standard displays25 video frames per second.InterlacedInterruptInterrupt handlerISAISOIsolationISRJumperInterlaced – describing the standard televisionmethod of raster scanning, in which the image isthe product of two fields, each of which is a seriesof successively scanned lines separated by theequivalent of one line. Thus adjacent lines belongto different fields.An external event indicating that the CPU shouldsuspend its current task to service a designatedactivity.The section of the program that performs thenecessary operation to service an interrupt whenit occurs.Instrument Society of America.International Standards Organization.Electrical separation of two circuits. For example,optical isolation allows a high-voltage signal to betransferred to a low-voltage input withoutelectrical interactions.Interrupt service routine. See Interrupt handler.A wire that connects a number of pins at one endof a cable.k Abbreviation of ‘kilo’, the SI prefix for ‘1000’.See also K.KLANLCDLDMIn computer terminology, a K is 2 10 = 1024. Thisdistinguishes it from the SI unit k (kilo), which is1000.Local area network. A data communicationssystem confined to a limited geographic area,typically about 10 km, with moderate to high datarates (100 kbps to 50 Mbps). Some type ofswitching technology is used; but common carriercircuits are not used.Liquid crystal display. A low-power display usedon many portable PCs and instruments.Limited distance modem. A signal converter thatconditions and boosts a digital signal so that itmay be transmitted further than a standard RS-232 signal.