COMMAND REFERENCE
Command Reference
66 LDC-3700 Series
CHAPTER 4
The LASer:CAL:MDI? query is used to determine that the LDC−3700B Series Laser Diode Controller
is ready for a value to be entered during the calibration cycle of the LASer:CAL:MDI mode.
Notes After this query is issued and a response of 1 is received, the LDC−3700B Series Laser Diode
Controller be ready for the user to enter a photodiode current value via the LASer:MDI command
(see Chapter 6).
Examples "LAS:CAL:MDI?" −response: 1, means the LDC−3700B Series Laser Diode Controller is ready for
the user to enter a photodiode current value via the LASer:MDI command.
The LASer:COND? query returns the value of the status condition register of the LASER operations.
−where the response is the sum of the following:
Notes The LASER conditions which are reported to the status byte are set via the LASer:ENABle:COND
command.
The Open circuit condition is only present while the LASER output is on, and when the hardware
detects this condition, it will turn the LASER output off. Therefore, the Open Circuit condition is
fleeting and may be missed via the LAS:COND? query. Therefore, the user should test for the Open
Circuit Event via the LAS:EVEnt? query.
The LASER condition status is constantly changing, while the event status is only cleared when the
event status is read or the *CLS command is issued.
Examples "LAS:COND?" −response: 513, means that the LASER limit current and out of tolerance LASER
conditions currently exist.
"Radix Hex; Laser:Cond?" −response: #H108, means that the LASER Output shorted and Power
limit conditions currently exist.
LASer:CAL: IPD?
MDI?
COMMON
DEVICE DEPENDENT
FRONT PANEL
LASer:COND?
COMMON
DEVICE DEPENDENT
FRONT PANEL
1 − LASER Current Limit 256 − Output is shorted
2 − LASER Voltage Limit 512 − Output is outside tolerance limit
4 − N/A 1024 − Output on/off state
8 − Power limit 2048 − Ready for calibration data state
16 − Interlock disabled 4096 − N/A
32 − N/A 8192 − N/A
64 − N/A 16384 − N/A
128 − Open circuit 32768 − N/A
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