Glossary
TDS 684A, TDS 744A, & TDS 784A User Manual
Glossary–7
Negative overshoot measurement
Amplitude (voltage) measurement.
NegativeOvershoot +
Low * Min
Amplitude
100%
Negative width
A timing measurement of the distance (time) between two amplitude
points — falling-edge MidRef (default 50%) and rising-edge MidRef (default
50%) — on a negative pulse.
Normal trigger mode
A mode on which the oscilloscope does not acquire a waveform record
unless a valid trigger event occurs. It waits for a valid trigger event before
acquiring waveform data.
NOR
A logic (Boolean) function in which the output of the OR function is
complemented (true becomes false, and false becomes true). On the
oscilloscope, that is a trigger logic pattern and state function.
OR
A logic (Boolean) function in which the output is true if any of the inputs are
true. Otherwise the output is false. On the oscilloscope, that is a trigger logic
pattern and state function.
Oscilloscope
An instrument for making a graph of two factors. These are typically voltage
versus time.
Peak Detect acquisition mode
TDS 700A Models Only: A mode in which the oscilloscope saves the
minimum and maximum samples over two adjacent acquisition intervals. For
many glitch-free signals, that mode is indistinguishable from the sample mode.
(Peak detect mode works with real-time, non-interpolation sampling only.)
Peak-to-Peak
Amplitude (voltage) measurement of the absolute difference between the
maximum and minimum amplitude.
Period
A timing measurement of the time covered by one complete signal cycle. It
is the reciprocal of frequency and is measured in seconds.
Phase
A timing measurement between two waveforms of the amount one leads or
lags the other in time. Phase is expressed in degrees, where 360_ comprise
one complete cycle of one of the waveforms. Waveforms measured should be
of the same frequency or one waveform should be a harmonic of the other.
