N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

GlossaryAActive Entry The currently selected, andtherefore editable, entry or parameterARB Arbitrary waveform generatorAWG Arbitrary waveform generator. Additivewhite Gaussian noiseBBBG Media Baseband generator media. Volatilememory, where waveform files are played oredited.BNC Connector Bayonet Neill- Concelmanconnector. A type of RF connector used toterminate coaxial cable.CCCW CounterclockwiseC/N Carrier- to- noise ratioCW Continuous wave. ClockwiseDDHCP Dynamic host communication protocolDwell Time In a step sweep (see page 49), thetime that the signal is settled and you can makea measurement before the sweep moves to thenext point.EEVM Error vector magnitude; the magnitude ofthe vector difference at a given instant betweenthe ideal reference signal and the measuredsignal.FFilter factor Alpha The filter’s alpha coefficient.It is only valid for root nyquist and nyquistfilters.Filter Factor BbT The filter’sbandwidth-bit-time (BbT). It is only valid for aGaussian filter (similar to alpha). BbT is definedby the GSM standard as 0.3 and by the DECTstandard as 0.5.GGaussian filter The Gaussian filter does nothave a zero Inter- Symbol Interference (ISI).Wireless system architects must decide just howmuch of the ISI can be tolerated in a system andcombine that with noise and interference. TheGaussian filter is gaussian shaped in both thetime and frequency domains, and it does notring like the root nyquist filters do. The effectsof this filter in the time domain are relativelyshort and each symbol interacts significantly (orcauses ISI) with only the preceding andsucceeding symbols. This reduces the tendencyfor particular sequences of symbols to interact,which makes amplifiers easier to build and moreefficient.GPIB General purpose interface bus. An 8- bitparallel bus common on test equipment.HHardkey A labeled button on the instrument.IIF Intermediate frequencyInt Media Internal media. Non−volatile signalgenerator memory, where waveform files areAgilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 329