Specifications

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Page 75
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Automatic Port Extensions – Step 2
• After coaxial calibration, connect an open or short to portion of fixture
being measured
• Perform APE: algorithm measures each portion of fixture and computes
insertion loss and electrical delay
• Values calculated by APE are entered into port extension feature
• Now, only fixture mismatch remains as source of error
(dominated by coaxial connector).
Coaxial calibration
reference planes
Ports
extended
Open or short
placed at end of each
transmission line
Page 76
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Measurement Results
Without
Automatic Port
Extension
With Automatic
Port Extension
Delay & loss compensation
(values computed by APE)
DUT
Opens
Stepped Impedance
Adjacent
Structure
Shorts
Balanced
Unbalanced
Balanced
Unbalanced
Balanced
Unbalanced
“Quattro”
demo
board