3-11
Troubleshooting
Command Error
Command Error
An error number in the range [-199 to -100] indicates that an IEEE 488.2 syntax
error has been detected by the instrument’s parser. The occurrence of any error in
this class will cause the command error bit (bit 5) in the event status register
(IEEE 488.2, section 11.5.1) to be set. If this bit is set, one of the following events
has occurred:
• An IEEE 488.2 syntax error has been detected by the parser. That is, a control-to-device
message was received which is in violation of the IEEE 488.2 standard. Possible
violations include a data element which violates device listening formats or whose type
is unacceptable to the device.
• An unrecognized header was received. Unrecognized headers include incorrect
device-specific headers and incorrect or unimplemented IEEE 488.2 common
commands.
Events that generate command errors will not generate execution errors,
device-specific errors, or query errors; see the error definitions in this chapter.
Command Error Message Descriptions
This section lists the signal generator’s command error messages and their
associated descriptions.
Error Number Error Description [description/explanation/examples]
-100
Command error
This is a generic syntax error for devices that cannot detect
more specific errors. The code indicates only that a command
error as defined in IEE 488.2, 11.5.1.1.4 has occurred.
-101
Invalid character
A syntactic command contains a character which is invalid for
that type. For example, a header containing an ampersand,
SETUP&. This error might be used in place of error numbers
-114, -121, -141 and some others.
-102
Syntax error
An unrecognized command or data type was encountered. For
example, a string was received when the device does not accept
strings.
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