VectorStar™ MS4640A Series Microwave Vector Network Analyzers : Miscellaneous Features : Frequency Blanking
 
Frequency Blanking
Frequency Blanking is typically used in secure environments to prevent frequency information from being displayed on the analyzer. When frequency blanking is activated, the display of all frequency information is changed from real value to “XXXX.”
Procedure
1. In normal operation, the frequency information is displayed at the bottom of the display area, and frequency values are displayed for each active marker.
• Figure: Typical Display Graph with Markers and Frequency Blanking Off) shows a typical display with frequency information displayed for all markers.
• At the bottom of the display area, not shown here, additional start and stop frequency information is displayed.
Typical Display Graph with Markers and Frequency Blanking Off)
2. A best practices recommendation is to save the current instrument setup configuration to a preset file.
• On the top menu bar, select File | Save and assign a unique name for the CAL file.
• Click Save.
3. To activate frequency blanking, from the Main Menu, select:
• System button | System menu | Utility button | Utility menu | Frequency Blanking toggle button.
4. Click the Frequency Blanking button to toggle the frequency display to Off.
• All frequency information is replaced with “XXXX”.
• The Frequency Blanking button is now unavailable.
Typical Display Graph with Markers and Frequency Blanking On
5. To restore frequency information and set Frequency Blanking to Off, click the Preset icon on the icon toolbar.
• The instrument returns to its last saved preset configuration.