User`s guide

System and File 3
N9340B User’s Guide 31
When the calibration function is triggered, the
current measurement is interrupted and a gauge
displays on the LCD. The gauge simply indicates
calibration action rather than calibration course, as
the calibration time is unpredictable. When the
calibration is finished, the LCD displays a
calibration, and the interrupted measurement
restarts.
Please refer to the operation procedures as below:
1 Use a BNC cable to connect a 10 MHz reference
signal to the EXT TRIG IN connector.
2 press [SYS] > {More} > {Calibration} > {Time Base} to
initiate a calibration.
Low Frequency Channel
Press [SYS] > {More} > {More} > {LowFreqChannel} to
enable the low frequency channel function. When
this softkey is enabled, the trace in the low
frequency range will has a better DANL.
This softkey is only available in spectrum analysis
mode with option XDM or option IBC.
NOTE
Time base calibration takes during a short time only when the
inner temperature is stable. When the inner temperature is
increasing, calibration takes a long-time course or will fail. If
the input reference signal is abnormal, the calibration cycle
will take a long and unpredictable time to exit, and the LCD
displays an error message.