HP 8114A - Page 60

3. On the HP 8114A set up the OUTPUT page as shown in the
following illustration:
II
Per 1.00 lls Out ON
Inh OFF f
DElZlY 50.0 I-IS Basclne +0.00 v
Width Fj@.@ns l%plitd mv
20.0
500 into 50.00 .--n--. Positive
I w-
Configuring the Output Page
4. Set the Digitizing Oscilloscope HP 54121T:
n Press (AUTOSCALE)
n Select the Display menu and set the Number of Averages to 64
m Set the VOLTS/DIV = 10 mV/div
m Set OFFSET to 1 V
n Select the Timebase menu and set the TIME/DIV to 100 ps/div
w Center the first positive-going edge of the signal (approximate
Delay = 98.5 ns)
5. Press m and (M]
6. Select the Window submenu and press [WINDOW MARKER 1) and set
it to 980 mV
7. Press (WINDOW MARKER 21 and set it to 1 V
8. Select the Acquire submenu, set the Number of Samples to 1000
and press CSTART ACQUIRING)
9. After the data for the time histogram has been acquired (#
Samples = lOO%), select the Result submenu
10. Press (MEAN) and [SIGMA). RECORD the values of sigma
11. The RMS-jitter is calculated as follows:
RMS -jitter =
Gsigma - delta.t.up
6
12. The RMS-jitter for delay of 50 ns is 50 ps. Enter the result in the
Test Report as TR entry 5.3 - 1
13. Set HP 8114A for delay of 500 ns
14. Repeat steps 9 to 12
Note
TIME/DIV = 200 ps/div. Approximate delay = 549 ns
15. The RMS jitter for delay of 500 ns is 175 ps. Enter the result in
the Test Report as TR entry 5.3 - 2
3.24 Testing the HP g114A