Click <f> to enable the input noise measurement. 

Figure 88: Input noise measurement drop-down menu

Click on the <f> drop down menu and select measurement of internal noise (Figure 88).

Click <go> or press the Enter key to start the actual measurement.

Click <go> again or press the ESC key to interrupt or cancel the measurement.

Figure 89: Input noise measurement data

The measurement is performed and when it is completed the measured are displayed (Figure 89).

Click <Renew gain measurement> to repeat the measurement.