HP 83480A - Top-Base; Using Markers to Show the Threshold Setting

General Purpose Oscilloscope Menus
Dene Measure Menu
Using markers to show
the threshold setting
1. To use the markers to show the threshold setting, press:
4
Shift
5 , 4
More Meas
5
N
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General Meas
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Vupper
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Enter
2. Select the channel, function, or memory you are measuring by pressing:
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channel ,
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function ,or
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memory
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Enter
3.
Dene
the
upper
threshold
level
by
pressing:
4
Dene
meas
5
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Thresholds
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user
defined
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Upper
A
djust
the
upper
value
.
The
marker
gives
you
a
visual
indication
of
where
the
upper
value
is
positioned
on
the
waveform.
4.
Use
the
same
procedure
to
adjust
the
middle
and
lower
threshold
values
.
If
the
marker value
is much
greater
than
the
threshold
value
,
the
marker
may be
clipped o
the screen.
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Top-base
The
T
op-base
function
sets
the
vertical reference
thresholds
for
amplitude
measurements
.
It also
sets
the
values
from
which
the
upper
,
middle
and
lower thresholds are calculated. The T
op and Base softkeys are displayed
when the
User Dened function is selected.
Key Path
4
Dene meas
5
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Top-base
10-11