Measure
148
12.10
Threshold
Measurement thresholds can be defined by the user. This is more flexible than fixed thresholds. For example, for pulse
width measurement, the threshold can be specified rather than fixed at 50%. For rise time, the lower / upper thresholds
can be specified rather than fixed at 10%/90%.
Changing the default threshold may change the measurement results of relevant measurement items, such as: Period,
frequency, +width, -width, +duty, -duty, +BWidth, -BWidth, delay, T@M , rise time, fall time, CCJ, cycles, rising edges,
falling edges, edges, Ppulses, Npulses, and delay measurement.
To configure the measurement threshold:
1.
Touch the
Config
option in the measure menu.
2.
Touch the
Threshold
in the measure config menu.
–
The
Measure Threshold
will be displayed.
3.
Set the type of threshold
•
Percent
: Set according to the percentage of waveform. The setting range
of lower value and upper value is 1% ~ 99%, and the low value shall not be
greater than the middle value and high value
•
Absolute
: Set according to the vertical range. The absolute threshold value de-
pends on the vertical scale, offset and probe attenuation. These values should
be set before setting absolute thresholds. Lower and upper values are limited to
the range of screen. If any absolute threshold is greater or less than the mini-
mum or maximum waveform value, the measurement may be invalid.
4.
Touch the
Upper
option and use the
Universal Knob
or the virtual key pad to set
the upper value.
5.
Touch the
Middle
option and use the
Universal Knob
or the virtual key pad to set
the middle value.
6.
Touch the
Lower
option and use the
Universal Knob
or the virtual key pad to set
the lower value.
Figure 12.22
Measure Threshold