ILX Lightwave LDC-3700C Series, Руководство пользователя, Страница: 168 / 176

C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
Calibration Overview
152
LDC-3700C Series
C H A P T E R
5

5 Input the first actual (measured) LASER output current (as an
<nrf value>
) via the
LAS:LDI <nrf value>
command.
If this value is to be measured and entered remotely via a GPIB controlled DMM, for
example, the measured value of the current should not be entered until the LDC-3700C
Series Laser Diode Controller is ready to receive it: The Controller will be ready to
receive the new measured value when, after a
LAS:CAL:LDI?
query is sent, the
response from the Controller is "1".
6 Once the newly measured I value is entered via the
LAS:LDI
command, the Controller
will apply a new current equal to about 25% of the previous set current.
7 Input the second actual (measured) LASER output current (as an
<nrf value>
) as in
Step 5.
8 Once the second actual I value is entered via the
LAS:LDI
command, the new calibration
constants will be calculated and stored into non-volatile memory. In low bandwidth
calibration mode, the LDC-3700C Series Laser Diode Controller will also perform current
limit calibrations for I and P modes as indicated by the
CURRENT LIMIT LED flashing.
The
*OPC?
query may be used (after the
LAS:LDI
value is sent) to determine when the
calibration is completed.
9 Change the Laser Mode to I
HBW
(high bandwidth constant current mode) with the
LAS:IHBW
command. Repeat the calibration procedure as described above.