Example 3: Automated Measurements
TDS 620 & TDS 640 User Manual
1Ć15
H
The High Ref side menu item is highlighted, and a box appears around
the 90% readout in the High Ref menu item. The box indicates that the
general purpose knob is currently set to adjust that parameter.
Turn the general purpose knob left and right, and then use it to adjust the high
level to 80%. That sets the high measurement reference to 80%.
Hint: To make large changes quickly with the general purpose knob, press the
SHIFT button before turning the knob. When the light above the SHIFT button
is lit and the display says
Coarse Knobs in the upper-right corner, the gener-
al purpose knob speeds up significantly.
The Numeric Keypad
Any time the general purpose knob is set to adjust a numeric parameter, you
can enter the value as a number using the keypad instead of using the knob.
Always end the entry of a number by pressing the ENTER (
) button.
The numeric keypad also provides multipliers for engineering exponents, such
as m for milli, M for mega, and
m
for micro. To enter these multiplier values,
press the SHIFT button, then press the multiplier.
1.
Press Low Ref (side).
2.
Press 2
➞
0 (numeric)
➞
ENTER (
). That sets the low measure-
ment reference to 20%. Observe that the rise-time value has changed.
3.
Press Remove Measrmnt (main)
➞
All Measurements (side). That
returns the display to its original state.
You have seen how to display up to four individual automated measurements
on screen. You can also pop up a display of most of the automated measure-
ments available in the Select Measrmnts side menus. This snapshot of
measurements is taken on the waveform currently selected using the channel
selection buttons.
As when displaying individual measurements, the signal display must be
stable, and that signal must have all the segments necessary for the mea-
surement you want.
1.
Press Snapshot (main) to pop up a snapshot of all available single
waveform measurements. (See Figure 1-17.)
Displaying a
Snapshot of
Automated
Measurements
Содержание TDS 620
Страница 10: ...Product Description Product Description vi...
Страница 17: ...Tutorial Replace this page with the tab divider of the same name...
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Страница 166: ...Signal Path Compensation In Detail 3 110 Figure 3 53 Performing a Signal Path Compensation...
Страница 180: ...Zoom In Detail 3 124 See Acquisition on page 2 7 See Display Modes on page 3 30 For More Information...
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