Agilent Technologies Option H48 Multiport Test Set Z5623A Spécifications Page 177

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Page 77
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Automatic Port Extension – Implementation
Measures S
ii
(reflection) of each port
Uses ideal open or short models
Computes electrical delay using best-fit straight-line model
Computes insertion loss using a best-fit dielectric loss model
Default setting uses frequencies in Active Channel Stimulus
(results in loss at two frequencies)
Active Marker choice uses frequency at Active Marker
(results in loss at one frequency only)
Computed delay & loss values are automatically displayed via
new port-extension tool bar
Values can be saved as part of instrument state or recorded
for manual insertion next time
Page 78
安捷倫科技高頻元件量測研討會
Feb.23, 2006
How is the Loss Term Calculated?
Loss is calculated for each frequency data point (f) as follows:
If Use1 is checked and NOT Use2 then:
Loss(f) = Loss1 * (f/Freq1) ^ 0.5 (coaxial loss model)
If Use1 AND Use2 are checked, then:
Loss(f) = Loss1 * (f/Freq1) ^ n (printed circuit board dielectric loss model)
•Where n = log10 [abs(Loss1/Loss2)] / log10 (Freq1/Freq2)
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