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5-11
IM 704210-01E
Setting the Sampling Mode and Measurement Function (Item)
5
Explanation
Measurement range
Measurement range is shown below. This measurement is available only when time stamp mode
has been selected.
0 to 99.999%
Selecting the channel to be used for measurement
Select either CHA or CHB.
Selecting the polarity
Select the desired polarity from the following.
•
: Measures the positive duty ratio (i.e. from a rising edge to the next falling edge).
•
: Measures the negative duty ratio (i.e. from a falling edge to the next rising edge).
Measurement t
p1
Measurement t
1
Measurement t
p2
Measurement t
2
CH A/
CH B
Example
1 [
% ] =
t
p 1
t
1
×
1 0 0
Duty ratio
2 [
] =
t
p 2
t
2
×
1 0 0
Duty ratio
%
Note
• Duty ratio measurement is not available if hardware histogram mode has been selected.
• t
p1
must be 71 ns or more in the above example, otherwise incorrect measurement will result. In addition,
incorrect measurement may also result if “t
1
– t
p1
” is below 30 ns. This also applies when negative
polarity is selected.
5.6 Setting Duty Ratio Measurement