Reference
The following t
ables list each automatic measurement by category: time or
amplitude.
Time measurements
Measurement Description
Period
The time required to complete the first cycle in a waveform
or gated region. Period is the reciprocal of frequency and is
measured in
seconds.
Frequency
The first c yc
le in a waveform or gated region. Frequency is the
reciprocal of the period; it is measured in hertz (Hz) where one
Hz is one cycle per second.
DelayRR
(rising to
rising)
The time between the mid reference (default 50%) amplitude
point of t
wo different rising waveforms. See also Phase.
DelayFF
(falling
to
falling)
Thetimeb
etween the mid reference (default 50%) amplitude
point of the two different falling waveforms.
DelayRF
(rising to
falling)
The time between the mid reference (default 50%) amplitude
point of the rising and the falling waveforms.
DelayFR
(falli
ng to
rising
The tim
e between the mid reference (default 50%) amplitude
point of the falling and the rising waveforms.
Rise Time
The time required for the leading edge of the first pulse in the
wavef
orm or gated region to rise from the low reference value
(default = 10%) to the high reference v alue (default = 90%) of
the final value.
Fall Time
The time required for the falling edge of the first pulse in the
wave
form or gated region to fall from the high reference value
(default = 90%) to the low reference value (default = 10%) of
the final value.
Positive
Duty Cycle
The ratio of the positive pulse width to the signal period
exp
ressed as a percentage. The duty cycle is m easured on the
first cycle in the waveform or gated region.
Ne
gative
Duty Cycle
The ratio of the negative pulse width to the signal period
expressed as a percentage. The duty cycle is measured on the
fir
st cycle in the waveform or gated region.
Positive
P
ulse
Width
T
he distance (time) between the mid reference (default 50%)
amplitude points of a positive pulse. The measurement is made
on the first pulse in the waveform or gated region.
Negative
Pulse
Width
The distance (time) between the mid reference (default 50%)
amplitude points of a negative pulse. The measurement is made
on the first pulse in the waveform or gated region.
TBS1000B and TBS1000B-EDU Series Oscilloscopes User Manual 87