Glossary
acquisition Denotes one complete cycle of data gathering by a module. For example, in the HP 16532 oscillo- scope, one complete cycle gathers 8000 samples of information and stores them in acquisition memory.
arm The arm output from a mod- ule is set false when the module begins running and is set true when the module finds its trigger condi- tion. Other measurement modules that take the arm signal as an input are unable to capture data or search for their triggers until they receive their arm signal. The arm signal is usually used to coordinate measure- ment start between two or more measurement modules.
attenuation factor | See probe |
field. |
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autoscale algorithm | An algo- |
rithm for oscilloscope modules that, based on the amplitude and period of the signals found, sets the vertical sensitivity in volts per division, off- set, horizontal sweep speed in seconds per division, trigger level, and trigger slope for the trigger in- put. Its purpose is to set up the system so that two to five cycles of the input waveform are displayed on the screen. The waveform is from the lowest numbered and lettered channel with a signal.
cancel autoscale The field that al- lows you to cancel an autoscale command. This field is particularly important if you inadvertently select the Autoscale field when you have your measurement configuration set. Automatically scaling your signals at this point could change your present configuration.
cancel run The field that allows you to cancel making an oscilloscope run for any reason once you have se- lected the Run field.
coupling field The field that sets the input impedance for the signal applied to oscilloscope channels. For example, in the HP 16532A, the in- put coupling can be set to 1 Mohm/DC, 1 Mohm/AC, and 50 ohm/DC.
cross triggering Using inter- module capabilities to have measurement modules trigger each other. For example, you can have an external instrument arm a logic ana- lyzer, which subsequently triggers an oscilloscope when it finds the trigger state.
delay field The field that sets the horizontal position of the waveform on the screen for the oscilloscope and timing analyzer. Delay time is measured from the trigger point. It is measured in seconds, can be viewed
