User manual

34
Measurements
.
PULSE WIDTH –: This mode measures the
width of the negative pulse. A negative pulse
consists of a falling slope followed by a rising
slope.Thismeasurementtypeidentiesthetwoslopes
and calculates the pulse width from their time difference
(t). The measurement will only be applied to the selected
channel and requires a minimum of one completely dis-
played period of a triggered signal.
DUTY CYCLE +: This mode measures the
positive duty ratio. In this mode, positive signal
portionsareidentiedoveraspecicperiod
and will then be analyzed in relation to the signal period.
The measurement will only be applied to the selected
channel and requires a minimum of one complete period
of a triggered signal. The measured value Dty+ is dis-
played as a percentage of the signal period.
DUTY CYCLE –: This mode measures the ne-
gative duty ratio. In this mode, positive negative
portionsareidentiedoveraspecicperiod
and will then be analyzed in relation to the signal period.
The measurement will only be applied to the selected
channel and requires a minimum of one complete period
of a triggered signal. The measured value Dty+ is dis-
played as a percentage of the signal period.
RISE TIME 90%: This mode measures the rise
timeoftherstrisingslopeinthedisplayed
view of the screen (t
r
). The risetimeidenties
the time in which the signal rises from 10% to 90% of its
amplitude.
FALL TIME 90%: This mode measures the fall
timeoftherstfallingslopeinthedisplayed
view of the screen (t
f
).Thefalltimeidenties
the time in which the signal falls from 90% to 10% of its
amplitude.
RISE TIME 80%: This mode measures the rise
timeoftherstrisingslopeinthedisplayed
view of the screen (t
r80
). The risetimeidenties
the time in which the signal rises from 20% to 80% of its
amplitude.
FALL TIME 80%: This mode measures the fall
timeoftherstfallingslopeinthedisplayed
view of the screen (t
f80
). The fall time identi-
esthetimeinwhichthesignalfallsfrom80%to20%of
its amplitude.
σ-STD. DEVIATION: This mode measures the
standard deviation of the signal amplitude in
the displayed view of the screen. The standard
deviation is the measurement for the deviation
of a signal from its mean value. A low result indicates that
the values are close to the mean value. A higher result
illustrates that on average the difference between the va-
lues is greater.
DEL AY: This mode measures the time delay
between the set measurement source and
the reference source. This mode searches for
the slope of the measurement source that is closest to
the time reference. Then, beginning from this point, it
searches for the nearest slope of the reference source.
This time difference indicates the measurement result. A
submenu (DELAY SETUP) allows you to select the setting
for measurement source, reference source and slopes.
PHASE: This mode measures the phase
between two slopes of two channels in the
displaced view of the screen (Phs). This mode
measures the relation of the time delay between the set
sources to the signal period of the measurement source.
This mode searches for the slope of the measurement
source that is closest to the time reference. Then, begin-
ning from this point, it searches for the nearest slope of
the reference source. The time difference and the signal
period indicate the measurement result in degrees. A sub-
menu (MEASUREMENT SOURCE/ REFERENCE SOURCE)
allows you to select the measurement source and the
reference source with the universal knob in the CURSOR/
MENU section.
COUNT + : This mode counts positive pulses
in the displayed view of the screen. A positive
pulse consists of a rising slope followed by a
falling slope. The mean value is calculated from the ampli-
tude of the measurement signal. A slope will be counted if
the signal runs through the mean value. A pulse that pas-
ses the mean value only once will not be calculated. The
measurement will only be applied to the selected channel.
COUNT – : This mode counts negative pulses
in the displayed view of the screen. A negative
pulse consists of a falling slope followed by a
rising slope. The mean value is calculated from the ampli-
tude of the measurement signal. A slope will be counted if
the signal runs through the mean value. A pulse that pas-
ses the mean value only once will not be calculated. The
measurement will only be applied to the selected channel.
COUNT +/ : This mode counts signal changes
(slopes) from Low Level to High Level in the
displayed view of the screen. The mean value
is calculated from the amplitude of the measurement sig-
nal. A slope will be counted if the signal runs through the
mean value. The measurement will only be applied to the
selected channel.
COUNT –/ : This mode counts signal changes
(slopes) from High Level to Low Level in the
displayed view of the screen. The mean value
is calculated from the amplitude of the measurement sig-
nal. A slope will be counted if the signal runs through the
mean value. The measurement will only be applied to the
selected channel.