Agilent Technologies Infinium DCA 86100A Service Manual page 75

DCA Setup:
3 Push the default setup button.
4 Turn off all channels except for channel 2
5 Set the DCA to 10 mV/div, 400 ps/div and 24 ns Delay.
6 Set the trigger source to the front panel.
7 Acquisition points to 4000.
8 Set the delay to 40 ns.
Take Measurements:
9 Set the 83712B to -19 dBm.
10 Adjust the 83712B until you read 20 mVp-p on the DCA. This should be about -19 dBm.
11 Set to DCA for the following.
a Averaging of 1024 points.
b Execute a stop, then clearscreen.
c Execute a run.
12 When the 1024 waveforms have been collected save the waveform data to a floppy disk.
13 Use an external program to process the following tasks with the data:
a Create an ideal sinusoidal waveform at 10 GHz that covers 4 ns (40 periods).
b Plot a single graph that has the measured data and the ideal waveform.
c Calculate the time error for each point by comparing to a ideal sine wave.
d Plot a graph of error in ps verses time.
e Compare each error point in ps to the Test Limits.
14 All points must be a pass for this test to pass.
15 Repeat the test for all the delay settings listed.
Software
N O T E Contact the division for information on the test software.
Data Storage:
• Instrument delay setting
• Timebase setting
• Number of acquisition points
• The data from the waveform collected
Performance Verification
Fine Timebase Accuracy Test, 86100C
4-25