HP 4284A - Page 120

correction data when the FREQ1 , FREQ2 , and FREQ3 elds are
set to OFF.
When the FREQ1 , FREQ2 , and FREQ3 elds are set to ON, and
the test frequency is equal to FREQ1/2/3, the OPEN correction
data at FREQ1/2/3 is used. (Refer to APPENDIX D.)
5.
Press
NNNNNNNNNNN
OFF not to p erform the OPEN correction calculations on
subsequent measurements.
SHORT Correction
Description
The HP 4284A's SHORT correction capability corrects for the
residual imp edance (R, X) in serial with the device under test (Refer
to Figure 4-12).
Figure 4-12. Residual Impedance
The HP 4284A uses the following two kinds of SHORT correction
data.
The SHORT correction data is taken at all 48 preset frequency
points independent of the test frequency(ies) you set, and the
SHORT correction data for each measurement p oint other
than those present frequency p oints are calculated using the
interpolation metho d(Refer to Figure 4-11). All preset frequency
points (48 frequency p oints) are as same as the preset frequencies
for the OPEN correction using the interpolation metho d.
To take the SHORT correction data at the preset frequency p oin
ts,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MEAS SHORT , which is displayed when the cursor is moved to the
SHORT eld, is used.
The SHORT correction data which is taken at the frequency
points you sp ecify.You can set up to three frequency points in the
FREQ1 , FREQ2 , and FREQ3 elds.
To take the SHORT correction data at the frequency points you
specify,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MEAS SHORT , which is displayed when the cursor is moved
to the FREQ1 , FREQ2 ,or FREQ3 eld, is used.
MEAS SETUP Menu 4-23