Keysight E5071C ENA Service Manual page 348

Messages
Error Messages
-171 Invalid expression
The expression-data element is invalid (see 7.7.7.2, IEEE488.2). Parentheses
are not paired, or illegal characters are used, for example.
-103 Invalid separator
The parser (a syntactic analysis program) had been expecting a delimiter, but a
character that is not a delimiter has been sent.
-151 Invalid string data
Character string data has been expected, but the character string data that
appears is invalid for some reason (see 7.7.5.2, IEEE488.2). The END message
is received before the ending quotation mark character appears, for example.
-131 Invalid suffix
The suffix does not comply with the syntax defined in 7.7.3.2, IEEE488.2. Or it
does not suit E5071C.
L
53 Log sweep requires 2 octave minimum span
The span of sweep range is not satisfied the requirement for logarithmic sweep.
The sweep type is automatically changed to linear sweep when this error
occurs.
For example, this error occurs when, with the start and stop frequency are set 1
MHz and 2 MHz respectively, the sweep type is changed to logarithmic sweep.
Set the stop frequency to more than four times as many as the start frequency.
And then select logarithmic sweep.
M
-109 Missing parameter
The number of parameters is less than that required for the command, or the
parameter has not been entered. For example, the command
SENS{1-6}:SWE:POIN requires one more parameter.
Therefore, when a message "SENS1:SWE:POIN" is sent to a correct program
message "SENS1:SWE:POIN 201" this instrument receives the former message
as an invalid one because all parameters have not been entered. Enter
command parameters correctly.
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Keysight E5071C Service Manual