Note
4 .
5
6.
7.
8 .
9 .
10.
11.
12.
RECORD the delta t reading. This is the fall time of the reference
signal within a 1% amplitude window of the signal connected to
Input 4. This value is needed later to calculate the correct jitter.
Set the HP 8114A pulse width to 50 ns
Select the
menu and center the first negative-going edge
of the signal (approximate Delay = 78.8 ns)
(MORE) and
Select the Window submenu and set:
n
Source is channel 4
n
Choose the Time Histogram
n
Press
(
WINDOW MARKER
and set it to 1.02 V
n
Press
(
WINDOW MARKER
and set it to 1.00 V
Select the Acquire submenu, set the Number of Samples to 1000
and press
(
START ACQUIRING
)
After the data for the time histogram has been acquired (#
Samples =
select the Result submenu.
Press (MEAN) and (SIGMA). RECORD the value of sigma
The RMS-jitter is calculated as follows:
13. The RMS-jitter for pulse width of 50 ns is 50 ps. Enter the result
in the Test Report as TR entry 5.2 1
14. Set the HP 8114A for pulse width of 500ns
15. Repeat steps 7 to
=
Approximate delay = 529 ns
16. The RMS-jitter for pulse width of 500 ns is 175 ps. Enter the
result in the Test Report as TR entry 5.2 2
3.22
Testing the HP
