Agilent Technologies InfiniiVision 6000 Series, Руководство пользователя, Страница: 242 / 368

242 6000 Series Oscilloscope User’s Guide
5 Making Measurements
thresholds. Each analog channel and the math waveform can
be assigned unique threshold values.
3 Press the Type softkey to set the measurement threshold to %
(percentage of Top and Base value) or to
Absolute
(absolute
value.)
• Percentage thresholds can be set from 5% to 95%.
• The units for absolute threshold for each channel is set in
the channel probe menu.
• When the
Source
is set to
Math
, the threshold
Type
can only
be set to
Percent
.
4
Press the
Lower
softkey, then turn the Entry knob to set the
lower measurement threshold value.
Increasing the lower value beyond the set middle value will
automatically increase the middle value to be more than the
lower value. The default lower threshold is 10% or 800 mV.
If threshold
Type
is set to
%
, the lower threshold value can be
set from 5% to 93%.
5 Press the Middle softkey, then turn the Entry knob to set the
middle measurement threshold value.
The middle value is bounded by the values set for lower and
upper thresholds. The default middle threshold is 50% or
1.20 V.
Source
select Threshold
Type Lower
Threshold Middle
Threshold Upper
Threshold Return to
previous menu
Absolute threshold hints
• Absolute thresholds are dependent on channel scaling, probe attenuation, and
probe units. Always set these values first before setting absolute thresholds.
• The minimum and maximum threshold values are limited to on-screen values.
• If any of the absolute threshold values are above or below the minimum or
maximum waveform values, the measurement may not be valid.