> Amplitude Menu
> Key Sequence: Amplitude

> Amplitude Menu

> Top
> Sets the top amplitude value using the keypad, the arrow keys, or the rotary knob. Press Enter to complete the entry.
> Bottom
> Sets the bottom amplitude value using the keypad, the arrow keys, or the rotary knob. Press Enter to complete the entry.
> Autoscale
> Automatically sets the top and bottom scales to the minimum and maximum values of the measurement with some margin on the y-axis of the display.
> Fullscale:
> Fullscale automatically sets the scale to the default setting. 0 dB to 60 dB for Return Loss measurements, 0 to 30 dB for Cable Loss, and 1 to 65 for VSWR measurements.
> The following submenu key appears only for Smith Chart measurements, and is then the only submenu key in the Amplitude Menu:
> Ref. Impedance
> 50 Ω 75 Ω
> Sets the reference impedance that is used for Smith Chart calculations to either 50 Ω or 75 Ω. The reference impedance determines the value of impedance at the center of the Smith Chart. Figure: Set Reference Impedance for Smith Chart Measurement illustrates a Smith Chart measurement, shown in dual display format.

> Set Reference Impedance for Smith Chart Measurement

Site Master™ S331L User Guide : Cable and Antenna Measurements : Amplitude Menu