REMOTE OPERATION
Common Commands and Queries
48 LDC-3900 Series
CHAPTER 3
If multiple parameters are expected, they should be separated with commas. For
example, to set the Steinhart-Hart constants on the LDC-3900 (C1, C2, and C3)
the following command could be sent:
"TEC:CONST 1.111, 2.004, 0.456".
If not all of the parameters need to be changed, i.e. C2 only, the other parameters
may be omitted as in:
"CONST ,2.004, "
A query has no space between the mnemonic and the question mark, as in:
"LAS:LDI?"
The LDC-3900 uses a terminator of <CR><NL><^END> (carriage return, new
line, EOI). In almost all cases, these terminators are automatically inserted by the
host (user's) computer or GPIB driver
. For more information, see <PROGRAM
MESSAGE TERMINATOR> on page 40 or the IEEE-488.2 standard definition.
Common Commands and Queries
This section contains a list of the common commands and queries which are
supported by the LDC-3900 Modular Laser Diode Controller. The common
commands and queries are distinguished by the * which begins each mnemonic.
The common commands and queries are listed in alphabetical order, and a brief
description of their functions is given. For more information on these commands,
refer to an ANSI/IEEE 488.2-1987 standards reference.
*CAL?
This is the calibration query. When it is sent, the LDC-3900 performs the A to D
calibration procedure. After this query is sent, the LDC-3900 responds with a
message indicating that calibration has been completed successfully or
unsuccessfully. A response of 0 means no errors, any other number means an
error in calibration was detected. An auto-calibration is performed each time the
LDC-3900 accumulates 10 minutes of inactive time since the last auto-calibration.
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