HP 8114A Service Manual page 55

n
n
RECORD the delta t reading. This is the rise time of the reference
signal wit,hin a 1% amplitude window of the signal connected to
Input. 4. This value is needed later to calculate the correct jitter.
Select, the Timebase menu and center the second positive-going
edge of the signal (approximate Delay = 129 ns)
7.
Press INIORE) and (HISTOGRAM)
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n
n
8.
Select the Acquire submenu, set the Number of Samples to 1000
and press
9.
After the data for the time histogram has been acquired (#
Samples = lOO%), select the Result submenu.
10.
Press INIEAN) and (SIGMA). RECORD the value of sigma
The RMS-jitter is calculated as follows:
11.
12. The RMS-jitter for period of 100 ns is 75 ps. Enter the result in
the Test Report as T R entry 5.1 - 1
13. Set the HP 8114A period to 500 ns
14. Repeat steps 6 to 11
N o t e
TIME/DIV = 200 ps/div; approximate Delay = 530 ns
15. The RMS-jitter for period of 500 ns is 175 ps. Enter the result in
the Test Report as TR entry 5.1 - 2
Set START ON EDGE = PCS1 and STOP ON EDGE = POSI
Press the
(
PRECISE EDGE FIND
Select the Window submenu and set:
Source is channel 4
Press
[ -
WINDOW MARKER I
Press
[
WINDOW MARKER
(
START ACQUIRING
key
]
and set it to 980 mV
]
')
Testing the HP 9114A 3.19