3- 1
Keysight Electronic Calibration Modules
RF/Microwave Two Port
Reference Guide
3 Operating ECal Module
Setting Up a Calibration 
Use the following procedure as a starting point for calibrating the network 
analyzer with an ECal module. For more detailed information about adjusting 
the settings of your analyzer, refer to the appropriate user guide or online Help.
Understanding the ECal LEDs
The ECal module has three different LEDs that may be displayed during 
operation: 
Table 3-1  N755xA Status LED Operation
Status LED Color Description
Off
— ECal is not connected to an 
instrument or is malfunctioning.
— See also, Figure “ECal 
Troubleshooting” on page 3-14.
Steady Green
— ECal is connected, functioning, and 
communicating normally 
a
Orange
— ECal connected and functioning, but 
is not communicating with the driver 
software.
— See also, Figure “ECal 
Troubleshooting” on page 3-14.
a. Status LED briefly flashes orange when the ECal is first connected to an instrument while the 
driver software loads.