Tektronix TDS5054, User Manual

Page: 335 / 361

Glossary
Glossary- 8
TDS5000 Series User Manual
Peak Detect acquisition mode
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, noninterpolation 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.
Persistence
The amount of time a data point remains displayed. There are three
persistence modes available in the oscilloscope: Variable, Infinite, and Off.
Phase
A timing measurement between two waveforms of the amount one leads or
lags the other in time. Phase is expressed in degrees, where one complete
cycle comprises 360
_
of one of the waveforms. Waveforms measured should
be of the same frequency or one waveform should be a harmonic of the
other.
Pixel
A visible point on the display. The oscilloscope display is 640 pixels wide
by 480 pixels high.
Positive duty cycle
A timing measurement of the ratio of the positive pulse width to the signal
period, expressed as a percentage.
Positive overshoot
Amplitude (voltage) measurement.
PositiveOvershoot
=
Max
−
High
Amplitude
×
100 %
Positive width
A timing measurement of the distance (time) between two amplitude
points — rising-edge
MidRef (default 50%) and falling-edge MidRef (default
50%) — on a positive pulse.
Posttrigger
The specified portion of the waveform record that contains data acquired
after the trigger event.