ILX Lightwave LDX-36000 Series User Manual page 150

6
C H A P T E R
Open Circuit error E503 or Voltage
Limit error E505 prevents output from
reaching desired value.
Measured voltage always reads zero.
Cannot set or control temperature.
Cannot display temperature.
Display blanks out when attempting to
adjust pulsewidth, duty cycle and/or
frequency.
134
 LDX-36000 Series
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
Troubleshooting
The LDX-36000 series has an adjustable compliance
voltage. Check to see if the voltage limit setting is too low.
Check laser connections
Verify voltage sense lines are connected across load.
Vsense+ to laser anode; Vsense- to laser cathode.
Temperature is a measurement only and cannot be
controlled from the LDX-36000.
Temperature display has been disabled by setting all three
Steinhart-Hart thermistor constants to zero. Use the Cal T
parameter to set the constants to match the thermistor
being used.
Adjustments to these parameters can only occur when the
instrument is placed in the appropriate mode. For
example, none of these parameters are adjustable in
QCW-Ext mode because they are controlled by a signal
input into the front panel Ext Pulse in BNC connector.