VectorStar™ MS4640A Series Microwave Vector Network Analyzers : Response Menus - 4-Port VNAs : Noise Figure Response Menu
 
Noise Figure Response Menu
NF RESPONSE Menu - 4-Port VNAs
Full Name
• NOISE FIGURE RESPONSE Menu
Prerequisites
• The VNA must be equipped with Option 041 – Noise Figure.
• The application mode must be set to Noise Figure on the APPLICATION menu.
• MAIN | Application | APPLICATION
• Application Menus - Noise Figure
Button Selection Group
• The buttons on the NF RESPONSE menu form a button selection group where selection of any one button de-selects all other buttons.
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• Primary Response Menus - 4-Port VNAs
Navigation
• MAIN | Response | RESPONSE | Noise Figure | NF RESPONSE
 
NF RESPONSE (Noise Figure Response) Menu
 
Note 
All of the noise figure response types are real only. Keep this in mind when selecting graph types. Noise figure and noise power quantities are computed using a 10 × log10 convention when a log mag graph type is selected.
 
Noise Figure
Select sets the noise figure measurement to Noise Figure. Noise figure is measured using the “cold source” technique. The units are set by the graph type.
Noise Temperature
Temperature Kelvin. Read-only display of the IEEE default temperature of 290 K. The noise temperature is calculated from the noise figure. For reference:
• 290 K = 17 ºC (62.6 ºF)
• 0 K = −273.15 °C (−459.67 °F)
Noise Power
Select sets the noise figure measurement to Noise Power trace response. The measurement units are set by the display graph type. The units will be in absolute power when a receiver calibration is applied.