41
[Setup] Key
[Open] correction will completely correct the typical frequency of the instrument. These
frequency points vary depending on the instrument version:
For these typical frequencies, please refer to the test frequency "List of frequently used
frequencies".
To perform open correction
Step 1
Press the [Setup] key, then press [CORRECTION] to enter <CORRECTION> page.
Step 2
Use the cursor key to select [OPEN TEST] field
Soft key
Function
OFF
Disables open correction. The clear value does not participate in
the measurement operation.
MEAS OPEN
Perform open correction for full frequency and DCR
DCR OPEN
Perform DCR open correction only.
Step 3
Press [MEAS OPEN] soft key, a dialog message display “Open-circuit the test terminals”.
Step 4
After pressing [OK], the instrument starts to perform correction.
When correcting, there will be a progress bar prompt at the bottom of the page, and the
“Trig'd” indicator will flash.
After the correction is completed, the progress bar disappears.
During correction, users can cancel the correction at any time by pressing the [Abort]
button.
5.2.2
Short Correction [SHORT]
The short correction feature of the AT381x compensates for any residual impedances (R,X)
that may exist within the interval from the calibration plane, which is determined by the
selected cable length, to the DUT connecting points. (See Figure 5-4)
Figure 5-4
Residual Impedances
To perform short correction:
Step 1
Press the [Setup] key, then press [CORRECTION] to enter <CORRECTION> page.
Step 2
Use the cursor key to select [SHORT] field
Soft key
Function
OFF
Disables short correction. The clear value does not participate in the
measurement operation.