ILX Lightwave LDC-3700B Series - Page 97

COMMAND REFERENCE
Command Reference
82 LDC-3700 Series
CHAPTER 4
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The LASer:MODE:MDP command selects laser constant power mode.
Parameters None.
Notes This mode of laser operation requires the laser’s monitor PD feedback to maintain constant optical
power or constant monitor current.
In this mode, the displayed parameter will be either I
PD
(if CALMD = 0) in µA, or P
PD
(if CALMD > 0)
in mW.
Examples "LAS:MODE:MDP" −action: sets the laser output mode of operation to constant optical power mode.
The LASer:OUTput command turns the laser output on or off.
Parameters An <nrf value>; 1 = on, 0 = off.
Notes There is a 2−second delay after the output is turned on before the output shorting relay is opened.
Following this, the output current ramps up to the current set point slowly to protect the laser.
Therefore, the time to turn the output on and reach the set point current varies from 2 to about 3
seconds.
After the output is turned on, it may be useful to wait until the output is stable (within tolerance)
before performing further operations, but it is not necessary. When the LASER output is off, it is safe
to connect or disconnect devices to the LASER output terminals.
When the LASER output is off, an internal short is placed across the output terminals. This condition
causes the OUTPUT SHORTED light to come on.
Examples "LAS:I 20; LAS:OUT ON" −action: sets the laser output current to 20 mA and then turns the output
on.
The LASer:OUTput? query returns the status of the laser output switch.
Notes Although the status of the switch is on, the output may not have reached the set point value.
Examples "Las:OUT?" −response: 0, means that the output switch is disabled, devices may be safely
disconnected or connected at the LASER output terminals.
"LAS:OUT?" −response: 1, means that the LASER output switch is enabled, LASER output is
present.
LASer:MODE:MDP
COMMON
DEVICE DEPENDENT
FRONT PANEL
LASer:OUTput
COMMON
DEVICE DEPENDENT
FRONT PANEL
LASer:OUTput?
COMMON
DEVICE DEPENDENT
FRONT PANEL
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