Stanford Research Systems SR124 Operation And Service Manual page 76

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Example:
LCME?
Example:
IFFR 1234567; LEXE?; LEXE?
1;0
The error (1, "Illegal value,") is because the parameter value
(1234567) is too large for IFFR. The second read of LEXE? returns 0.
Last command error
Query the last command error code. A query of LCME? always clears
the error code, so a subsequent LCME? will return 0. Valid codes are:
Value Definition
0 No execution error since last LCME?
1 Illegal command
2 Undefined command
3 Illegal query
4 Illegal set
5 Missing parameter(s)
6 Extra parameter(s)
7 Null parameter(s)
8 Parameter bu er overflow
9 Bad floating-point
10 Bad integer
11 Bad integer token
12 Bad token value
13 Bad hex block
14 Unknown token
*IDN
LCME?
4
The error (4, "Illegal set") is due to the missing "?".
Remote Operation
SR124 Analog Lock-In Amplifier