CDA EVM9 User Manual download pdf (Page 43)

Agilent Template Tutorial

15 April, 2002

Agilent Restricted

Page 23

Last Feet is the Most Important, though

Fixturing and characterization of fixture are very important

• Use good RF coaxial cable

• Poor fixture/cable will make all calibration

effort meaningless

• As short as possible

• Ideally use only an adaptor for commercial

RF connector

• Because it is normally difficult to measure

fixture cable loss

Agilent Template Tutorial

15 April, 2002

Agilent Restricted

Page 24

Select Low Loss and High Isolation

Combiners/Dividers

High loss combiners/dividers will result in poor dynamic range of

uplink measurements and downlink signal level

• Wilkensen type combiner/divider

• Low loss (approx. 1 dB above split)

• Good isolation

• Moderate bandwidth

• 2 resistor type or 3 resistor type

• Lossy (>3 dB above split)

• Bad isolation

• Wide bandwidth (down to DC)

This slide was originally created for “Microwave System Design Methodology” training in 1997

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CDA EVM9 User Manual Page 43