ILX Lightwave LDC-3700 Series User Manual

e. After a few seconds, the LDC-3700 Series Laser Diode Controller will be ready for the actual I,, current to
be entered via the "LAS:MDI" command. The measured value of the current should not
be entered until
the LDC-3700 Series Laser Diode Controller is ready to receive it.
The LDC-3700 Series Laser Diode Controller will
be ready to receive the current value when, after a
"LAS:CAL:MDI?" query is sent, the response from the LDC-3700 Series Laser Diode Controller is "1".
f. Once the actual I,, value is entered via the "LAS:MDIfl command, the LDC-3700 Series Laser Diode
Controller will beep and the new calibration value will
be stored into non-volatile memory. It will then set
the output to approximately one-fourth of the original current. (For example, if the first calibration set
point was 4000
PA, the second set point will be about 1000 FA.) Then, it will be ready to receive the
second calibration value. Calculate the second current value as in Step a.
g. Input the second actual (measured) monitor diode current (as an <nrf value>) as in Step d.
h. Once the second actual
I,, value is entered via the "LASMDI" command, the new calibration constants
will be calculated and stored into non-volatile memory. The
"OPC?" query may be used (after the
"LAS:MDI" value is sent) to determine when the calibration is completed.
The operation complete flag (bit
0 of the Standard Event Status Register) may
be used to trigger a senice
request. This type of interrupt is enabled by setting bit
0 of the Senice Request Enable register (via the
*ESE command) and bit 5 of the Senice Request Enable regster (via the *SRE command). Senice
request (SRQ) handling depends on your
GPIB hardware. Refer to your GPIB user's manual for details.
6.4.5 Remote Operation Laser Voltage Measurement Calibration
The following procedure is for calibrating the LASER voltage measurement. This procedure can only be perfomled
rcmotely (over
GPIB).
a. With the LASER output off, connect a calibrated voltmeter, in parallel with a resistor (100 R, 2 Watt for
the LDC-3712; 15
R, 5 Watt for the LDC-3722B or LDC-3742B), to the LASER output of the LDC-3700
Series Laser Diode Controller.
b Set the range (100 mA for the LDC-3712, 500 mA range for the LDC-3722B. or 1000 mA for the
LDC-3712B). \ria the "LAS:RAN
x" (where x = 1 for LDC-3742B, 5 for LDC-3722B, or 1 for
LDC-3712).
Set the LASER current limit via the
"LAS:LIM:IxN (where x
= 1 for LDC-3742B, 5 for LDC-3722B, or 1
for LDC-3712) command to full scale for the selected range.
Set the I set point via the "LAS:LDI nnn" command. (where
nnn = 60 for the LDC-3712, 400 for the
LDC-3722B or LDC-3712B)
c. Enter the "LAS:OUT ON" command to turn the LASER output on. The LASER output must be on in
order to enter the LDV calibration mode.
d
Enter the "LAS:CAL:LDVW command to place the LDC-3700 Series Laser Diode Controller in its LASER
Voltage Calibration mode.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

ILX Lightwave LDC-3700 Series Specifications

General

Brand	ILX Lightwave
Model	LDC-3700 Series
Category	Controller
Language	English