Table of Contents
Advertisement
46
System Operation
LDD Parameters:
LDD Mode
Constant LD Current
Constant PD Current
Contant PD Power
TEC Parameters:
TEC Mode
Constant Current
Constant
Resistance/Reference
Constant Temperature
Users can modify the setpoints for both LDD and TEC from this screen. A
diamond symbol (
"selected" parameter; selected parameters are those that can be modified
through either the Control Knob or Cursor Arrow Keys.
Some messages are displayed on this screen to draw users' attention to various
events that may require them to take corrective action(s). For instance, a
flashing "E" symbol is shown on the left-top corner of the display whenever
the instrument generates an error message.
4.4.8.2
LDD Params Measurement Screen
A sample LDD Params measurement screen is shown in Figure 16.
In this screen, the most important parameters related to LDD are shown. The
contents of this screen can vary depending upon the mode of operation. See
table below for details.
Parameter 1
Laser Diode Current
Setpoint (Ild)
Photodiode Current
Setpoint (Ipd)
Photodiode Power
Setpoint (Ppd)
Parameter 1
Output Current
Setpoint (Is)
Resistance/Reference
Setpoint (Rs)
Temperature Setpoint
(Ts)
) to the left of the setpoint variable indicates the
LDD:
Ild=
Mode=
Im =
Vf =
Figure 17
A Sample LDD Params Measurement Screen
Parameter 2
Actual Photodiode
Current (Im)
Actual Laser Diode
Current (Io)
Actual Laser Diode
Current (Io)
Parameter 2
Actual Temperature (T)
Actual Output Current
(Ite)
Actual Output Current
(Ite)
250.00mA
LD Curr
0.0uA
0.000 V
Advertisement
Table of Contents
