Agilent Technologies E5070B, Руководство пользователя

Страница: 407 / 769

Chapter 12 401
Optimizing Measurements
Setting Port Extensions and Loss Values
1
2
. O
pt
imiz
ing
M
e
as
ur
em
e
nt
s
Setting Port Extensions and Loss Values
Setting port extensions
Port Extension is a function for moving the calibration reference plane by specifying the
electrical delay. This function is useful, for example, when you cannot directly perform
calibration at the DUT terminal because the DUT is inside the test fixture. In such a case,
this function enables you to first perform calibration at the test fixture terminal and then
move the calibration plane to the DUT terminal by extending the port.
Port extension corrects the electrical delay of each test port (phase shift) only. It cannot
remove errors caused by the loss in and incorrect matching of cables, adapters, or test
fixtures.
NOTE You can define port extension channel by channel. Setting port extension for one particular
channel does not affect other channels.
Operational procedure
Step 1. Press or to activate the channel for which you want to set port
extension.
Step 2. Press .
Step 3. Press
Port Extensions
.
Step 4. Set port extension for each test port.
Softkey Function
Extension Port 1
Sets port extension (in seconds) for test port 1.
Extension Port 2
Sets port extension (in seconds) for test port 2.
Extension Port 3
*1.Only with Options 313, 314, 413, and 414.
*1
Sets port extension (in seconds) for test port 3.
Extension Port 4
*2.Only with Options 413 and 414.
*2
Sets port extension (in seconds) for test port 4.