8-11
IM 701510-01E
Analyzing W
aveforms
8
Explanation
Waveforms which cannot be measured
For waveforms which cannot be measured, refer to page 8-2.
Setting the measurement range : Time range
The measurement range is determined at the displayed time axis by the two vertical cursors
T1 and T2. The position of cursor T1 indicates the starting point of measurement, and the
position of cursor T2 indicates the end point. Automatic measurements will be carried on
data within this range.
The default measurement range is 10div (time axis).
Measurement items : Item Setup
Measurement items can be selected from 20 different types. Items can be selected separately
for each related waveform. The default is no items selected.
A maximum of 24 items can be displayed at once on the waveform display. This also
includes the values of delay measurement.
The method of displaying the measurement values depends on the number of selected traces
or loaded waveforms. Refer to page 8-13 for more details.
The items which can be selected are as follows.
• Measurement items related to the voltage axis
When measuring items such as rise time and fall time, “High” represents the voltage for
the most frequently occurring high amplitude (at 100% level), while “Low” represents
the voltage for the most frequently occurring low amplitude (at 0% level). They are
therefore different from “Max” and “Min”, which just represent the maximum and
minimum voltage respectively.
P-P
MAX
MIN
HIGH
LOW
OVERSHOOT
UNDERSHOOT
P-P
(P-P)*
MAX
(Max)*
MIN
(Min)*
RMS
(Rms)*
AVG
(Avg)*
: Peak to peak value (MAX - MIN) [V]
: Maximum voltage [V]
: Minimum voltage [V]
: Root mean square value
(1/ n )(
∑
(xi)2)1/2 [V]
: Average voltage (1/n)
∑
xi [V]
UNDERSHOOT
( - Ovr)*
OVERSHOOT
( + Ovr)*
HIGH
(High)*
LOW
(Low)*
: Undershoot value
(LOW - MIN)/(HIGH - LOW) x 100 [%]
: Overshoot value
(MAX - HIGH)/(HIGH - LOW) x 100[%]
: High level voltage [V]
: Low level voltage [V]
*( ) shows the corresponding name at the
measurement item setting screen.
• Measurement items related to the time axis
+ WIDTH
- WIDTH
PERIOD
Distal line (90%)
Mesial line (50%)
Proximal line (10%)
RISE
FALL
HIGH (100%)
LOW(0%)
RISE
(Rise)*
FALL
(Fall)*
FREQ
(Freq)*
PERIOD
(Prod)*
: Rise time [s]
: Fall time [s]
: Frequency [Hz],1/PERIOD
: Period [s]
+ WIDTH
( + Wd)*
- WIDTH
( - Wd)*
DUTY
(Duty)*
: Width (s) greater than the mesial value
: Width (s) smaller than the mesial value
: Duty ratio + WITHDTH/PERIOD x 100[%]
*( ) shows the corresponding neme at the measurement item
setting screen.
8.3
Measuring Waveform Parameters Automatically
