Lightwave Communications LDX-3232 - Manual (Page 105)

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
04_06 LDX-3232 89
C H A P T E R
6
C H A P T E R
6
C
ALIBRATION AND
T
ROUBLESHOOTING
This chapter describes calibration of your LDX-3232 Series Current Source.
Descriptions of the required test instruments, calibration conditions, and the
detailed procedures for calibration of the instrument's Laser Diode Current Source
are included. A troubleshooting guide is also offered for some of the more
common failure symptoms. This chapter is divided into three major sections, local
(front panel) calibration, remote (through the GPIB Interface) calibration, and a
troubleshooting guide.
Calibration Overview
There are several calibrations to be performed to completely calibrate your
LDX-3232 Current Source. The Laser Diode Current Source calibration consists
of calibrating the current source in both ranges and both modes (low and high
bandwidth), calibrating the photodiode monitor feedback ammeter and finally the
forward voltage measurement. The current limits are calibrated internally by the
instrument as part of the calibration process.
Your LDX-3232 Current Source can be calibrated with the case closed. It should
be calibrated every 12 months or whenever performance verification indicates that
calibration is necessary, such as differences between setpoint and measurement
display values that exceed the accuracy specification. Calibrate the instrument
under laboratory conditions. We recommend calibration at 23°C ± 1.0°C. When
necessary, however, the LDX-3232 Current Source may be calibrated at its
intended use temperature if this is within the specified operating temperature
range of 0 to 40°C.