Agilent Technologies E4991A Service Manual page 348

Messages
Invalid character
-101 Invalid character
In the error message character string, an invalid character has been found. For example,
when a message "SENS:CORR1:COLL:FPO USER" is sent toward the proper program
message; "SENS:CORR1:COLL:FPO&USER", the ampersand symbol (&) will be
perceived by E4991A as an invalid character. In case the parameter is inputted at the end,
provide space between the command and the parameter.
-121 Invalid character in number
There are invalid characters in the received data and type. For example, an alphabetic
character has been found in a decimal numeric or a "9" has been found in octal data.
-171 Invalid expression
An expression data element is invalid (refer to IEEE488.2, 7.7.7.2). For example, the
brackets are not paired or the character violates the standard.
106 Invalid file name
During the execution of file save/recall command, the character string contained an
inappropriate file name. For example, when executing a recall command, the file name
extension was incorrect.
Specify an appropriate file name.
Also, when saving data on a floppy disk, this error message will be shown if the disk is not
properly inserted or the disk is write-protected.
77 Invalid material size
The definition of the size of the test material in a Magnetic Material Measurement is
invalid. For example, an attempt has been made to set the outer diameter of the test
material to a smaller figure than the inner diameter.
Set the outer diameter of the magnetic material to a larger size than that of the inner
diameter.
-103 Invalid separator
When the parser (compiler) is expecting a separating symbol, a character that is not a
separating symbol has been sent. For example, when the program message
"SENS:CORR1:COLL:FPO USER *OPC?" is sent instead of two program messages
correctly separated by a semi-colon as "SENS:CORR1:COLL:FPO USER;*OPC?" the
instrument cannot perceive the separation. When sending two program messages
simultaneously, be sure to insert a separating symbol such as a semi-column (;) between
the two messages.
-151 Invalid string data
Even though character string data are expected, the received character string is invalid for
some reason (refer to IEEE488.2, 7.7.2.4). For example, the END message has been
received before the closing quotation mark character appeared.
-131 Invalid suffix
The suffix (here meaning Unit) does not following the sentence structure defined by
IEEE488.2, 7.7.3.2, or the suffix is not appropriate for the E4991A. For example, when the
program message "SOUR:VOLT:STAR 10dbm" has been sent instead of the correct
program message "SOUR:VOLT:STAR 10mV", the suffix is regarded by the E4991A as
invalid. Refer to the command reference to confirm the unit that should be used for this
348 Appendix E