Agilent Technologies 8753ES Option 011 Service Manual page 285

Verify Shorts and Opens
Substitute a known good short and open of the same connector type and sex as the short
and open in question. If the devices are not from one of the standard calibration kits, refer
to the analyzer's user's guide for information on how to use the
function. Set aside the short and open that are causing the problem.
1. Perform an S11 1-port calibration using the good short and open. Then press
SMITH CHART
2. Connect the good short to port 1. Press
the front panel knob to enter enough electrical delay so that the trace appears as a dot
at the left side of the circle. (See
Replace the good short with the questionable short at port 1. The trace of the
questionable short should appear very similar to the known good short.
3. Connect the good open to port 1. Press
front panel knob to enter enough electrical delay so that the trace appears as a dot at
the right side of the circle. (See
Replace the good open with the questionable open at port 1. The trace of the
questionable open should appear very similar to the known good open.
Figure 9-2 Typical Smith Chart Traces of Good Short (a) and Open (b)
Chapter 9
to view the devices in Smith chart format.
Figure
Figure
ELECTRICAL DELAY
Scale Ref
9-2a, left.)
ELECTRICAL DELAY
Scale Ref
9-2b, right.)
Accessories Troubleshooting
Inspect the Error Terms
MODIFY CAL KIT
Format
and turn
and turn the
9-7