HP 4284A - Page 201

If the HP 4284A
does NOT Measure
Correctly
The HP 4284A is working correctly but its measurement results seem
strange. For example:
The HP 4284A does not measure at all.
Measurementvalue is strange.
Measurementvalue is strange at a specic frequency p ointor
points.
These situations may b e caused by the incorrect correction data. If
you come up on these situations, use the following pro cedure to check
the instrument.
1. Turn correction OFF.
a. Press 4
MEAS SETUP
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CORRECTION .
b.
Move the cursor to the OPEN eld and press
NNNNNNNNNNN
OFF .
c.
Move the cursor to the SHORT eld and press
NNNNNNNNNNN
OFF .
d.
Move the cursor to the LOAD eld and press
NNNNNNNNNNN
OFF .
e.
Press 4
DISPLAYFORMAT
5 and conrm CORR: turns OFF.
2. Measure the DUT again. If the HP 4284A now measures prop erly
then the correction data mayhave b een improp erly obtained or
saved. Carefully p erform the correction pro cedure again and
measure the DUT.
For more information on the correction pro cedure, refer to c
hapter 4,
\CORRECTION Page".
6-32 Measurement Procedure and Examples