Technical data

28 U1401A User’s and Service Guide
2 Calibrator Output Operations
Enabling and Disabling the Output
The U1401A can generate and measure signals
simultaneously. Pressing the OUTPUT key disables the
U1401A output by placing it in the standby mode. Pressing
this key again toggles the output on.
When the output is in the standby mode, the
annunciator disappears and the annunciator is
displayed instead. This means the calibrator has stopped
generating its output.
The standby mode will also be activated automatically if:
• you accidentally feed an external signal into the output
terminals while the output function is enabled.
• the noise from an external power system or output
terminals causes an error signal to the output. For
example, when ESD is performed with a voltage of
8000 V, this instrument will go into standby mode.
• an overload condition has been detected when generating
constant voltage or square wave outputs.
• the weak or low battery condition occurs. This ensures
output quality and serves as another alert to let the user
know that the energy level of the batteries is low.
• you put the slide switch into the M (input only) position
(you should do this to conserve battery power if you do
not intend to use any of the output functions).