BNC 645 - Manual (Page 79)

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5.6 Error Display
The waveform generator can store up to 20 syntax or hardware errors in
its error queue. Each error string may contain up to 255 characters. The
waveform generator beeps every time it detects an error (unless the
beeper is turned off). Errors are stored in first-in-first-out (FIFO) order
and they are cleared once read. To clear the error queue from the remote
interface, use the *CLS command. The error queue will not be cleared by
the *RST command, but will be cleared when the waveform generator is
turned off. Refer to Chapter 7 for more details about the error queue and
error messages.
How to read error messages
1. Press the Help button to enter the help topic selection.
2. Use the up and down softkeys to scroll the topic selection until
“View remote command error queue” is highlighted.
3. Press the softkey under “Select” to display the error messages.
4. Press the softkey under DONE to leave the help topics.
Remote interface operation
Use this command to read one error from the error queue:
SYSTem:ERRor?
Use this command to clear all the errors in the error queue:
*CLS
5.7 Calibration
You need a security code to calibrate or perform self-test on the
waveform generator.
Front panel operation
1. Press the Utility button and then the softkey under System
to enter the system related submenu.
2. Press the softkey under Test/Cal. Enter your security code
by using the numeric keypad.