Dutycyele Verification; Level Verification - HP 8133A Service Manual

Dutycycle Verification

Level Verification

5. On the o~jcilloscope:
a. Select the Timebase menu and adjust the DELAY until the
negative edge of the pulse is centered.
b. Select the Delta t menu.
c. Set the START ON NEG EDGE 1 and STOP ON NEG EDGE 1 and
press the Precise Edge Find key.
6. Check that the measured falltime
measured falltime on the Test Record.
7. On the orjcilloscope:
a. Select the Timebase menu and adjust the Time/Div to 5 ns/div.
b. Set the Delay to 16 ns.
Press More on the bottom row of keys, and select the Measure
menu.
d. Press More on the right-hand row of keys and select Duty Cycle
to me;%sure the Duty Cycle.
e. Check that the Dutycycle is 50% nominal.
8. On the o:jcilloscope:
a. Press More on the bottom row of keys.
b. Select the Delta V menu and set the Preset Levels to 0-100%.
c. Press Auto Level Set.
d. Check. that the Low Level V(l)
e. Check that the High Level V(2) is 1.8
(At)
0
is nominal.
V
nominal.
V
Testing the HP 813311 Pulse Generator 3.9