HP 81200, User Manual, Page: 206 / 240

Using Auxiliary Functions How to Compensate for Internal and External Delays
206
HP 81200 Data Generator/Analyzer Platform User Guide, Revision 2.1
6
Activate Probe .
The following window pops up:
Figure 116 Deskew Editor—Probe Measurement Window for a Generator Channel
7
Enter the Probe Attenuation factor
For the HP 1144A Active Probe this is 10.
8
Enter the Probe Delay .
If you don’t know the probe delay, you can make a first measurement by
connecting the probe directly to the first generator output. Start the
measurement by clicking OK. The result is the probe’s propagation
delay.
Close the Automated Deskew window. Click Measure again. Enter the
resulting value as the probe delay and repeat the measurement. Now the
resulting value for this output should be 0 ns.
9
Follow the instructions given in the window.
The measured delay value is automatically entered into the table and the
next instruction to connect the next generator output is displayed. After
all marked generators have been adjusted the Automated Deskew
window disappears.
10 Continue with the analyzers.
This is essentially the same procedure, except that you don’t use the
PROBE connector of the clock module, but one of the generator
channels as a reference. The system proposes the first of the installed
generator channels.
N O T E
If you are using the high speed differential analyzer HP E4837A, please
note:
The analyzer must be operated in differential mode.
Both inputs must be connected to a differential generator (E4838A or
E4843A).