HP 8753E manual S-parameter menu contains the following softkeys, Deilnition

S-parameters are exactly equivalent to the more common description terms below, requiring only that the measurements be taken with a.ll test device ports properly terminated.

Deilnition		!bt set	Direction
		Description
LL	a2 = 0	Input reflection coefficient	FWD
z	ap - 0	Forward @in	FWD
a1
!!A	a1 = 0	Reverse gain	REV
a2
h	a1 =o	Output reflection coefficient	REV
a2

The S-Parameter Menu

The S-parameter menu allows you to del?ne the input ports and test set direction for S-parameter measurements. The analyzer automatically switches the direction of the measurement according to the selections you made in this menu. Therefore, the analyzer can measure all four S-parameters with a single connection. The S-parameter being measured is labeled at the top left comer of the display.

The S-parameter menu contains the following softkeys:

w Refl: FWD Sll (A/R)

. Tram: FWD S21 (B/R)

nTram: REV S12 (A/R)

nRefl: REV S22 (B/R)

nANALOG IN Aux Input

. CONVERSION [ 1 provides access to the conversion menu.

. INPUT PORTS provides access to the input ports menu.

Analog In Menu

This menu allows you to monitor voltage and frequency nodes, using the analog bus and internal counter. For more information, refer to Chapter 10, “Service Key Menus and Error Messages” in the HP 8753E Network Analgzer Service Guide.

Conversion Menu

This menu converts the measured reflection or transmission data to the equivalent complex impedance (Z) or admittance (Y) values. This is not the same as a two-port Y or Z parameter conversion, as only the measured parameter is used in the equations. Two simple one-port conversions are available, depending on the measurement configuration.

An SI1 or s2 trace measured as reflection can be converted to equivalent parallel impedance or admittance using the model and equations shown in Figure 6-9.

6-30 Application and Operation Concepts