HP 54750A, User Manual, Page: 265 / 478

General Purpose Oscilloscope Menus
Dene Measure Menu
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
User Defined
User dened lets you set the top and base to a specic voltage value . The
upper , middle , and lower thresholds are then calculated from the voltage
values you select.
User dened simplies the threshold detection algorithm. The result is that
the measurement throughput of the instrument is increased, because the
instrument does not have to calculate the top-base values .
K ey Path 4
Dene meas
5
N NNNNNNNNNNNNNNNNNNNNNNNNN
Top-base
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
user defined
Using markers to show
top-base settings
The markers can be used to give you a visual indication of where you are
manually setting the top-base values on a waveform.
1. T o use the markers to show the top-base settings , press:
4 Ma rk ers 5
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
measurement
NNNNNNNNNNNNNNNNN
Enter
4 Shift 5 4 V amptd 5
N NNNNNNNNNNNNNNNN
Enter
2. Select the channel you are using.
3. A djust the T op and Base levels by pressing:
4 Dene meas 5
NNNNNNNNNNNNNNNNNNNNNNNNNN
Top-base
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
user defined
A djust the values of T op and Base . The markers give you a visual
indication of where you are positioning them on the waveform.
If the marker values are much greater than the top-base values , the
markers may be clipped o the screen.
10-13