ILX Lightwave LDC-3926339 User Manual page 74

LASER:SET:MDI?
Parameters
Notes
Examples
LASER:SET:MDP?
Parameters
Notes
Examples
LASER:SYNCLDI?
Parameters
Notes
Examples
LASER:SYNCLDV?
Parameters
Notes
Examples
02_03
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The LASER:SET:MDI? query returns the monitor photodiode current setpoint value.
None. The response is an <nrf value> which represents the constant MDI set point value, in µA.
The monitor photodiode current is dependent on the laser optical output power. Therefore, the MDI
set point may be used to control optical output of the laser.
Laser:set:mdi?-response: 30.0, means the laser monitor photodiode current setpoint is 30 µA, for
use in constant MDI mode.
The LASER:SET:MDP? query returns the laser monitor PD power set point value.
None. The response is an <nrf value> which represents the constant power set point, in mW.
This set point is used in constant MDP (P) mode only.
LASER:Set:MDP?-response: 10.0, means the laser monitor PD feedback set point is 10.0 mW.
The LASER:SYNCLDI? query returns the value of the selected channel's measured laser current, in
mA.
None. The response is an <nrf value> representing current in mA.
This is a "synchronized" measurement: the measurement system is connected to the current-mea-
sure signal when this query is received. A current measurement is made, and the result is returned
as the response. After the measurement is made, the measurement system returns to its normal
function, switching between the various signals and measuring them.
The response time to this query is from 200 msec to 250 msec, but the measurement is made as
soon as the query is received. In contrast, the laser:ldi? query returns immediately, but the
measurement can be up to 600 msec old.
LASER:syncldi?-response: 54.1, means the measured laser current is 54.1 mA.
The LASER:SYNCLDV? query returns the value of the selected channel's measured laser voltage,
in volts.
None. The response is an <nrf value> representing voltage in Volts.
This is a "synchronized" measurement: the measurement system is connected to the voltage-
measure signal when this query is received. A voltage measurement is made, and the result is
returned as the response. After the measurement is made, the measurement system returns to its
normal function, switching between the various signals and measuring them.
The response time to this query is from 200 msec to 250 msec, but the measurement is made as
soon as the query is received. In contrast, the laser:ldv? query returns immediately, but the
measurement can be up to 600 msec old.
LASER:syncldv?-response: 3.03, means the measured laser output voltage is 3.03 volts.
C O M M A N D R E F E R E N C E
GPIB Command Reference
4
C H A P T E R
57
LDC-3926339