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System Operation
LDD Mode
Constant LD Current
Constant PD Current
Constant PD Power
Users can modify the setpoints for LDD only from this screen. A diamond
symbol (
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.
4.4.8.3
TEC Params Measurement Screen
A sample TEC Params measurement screen is shown in Figure 16.
In this screen, the most important parameters related to TEC 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)
) to the left of the setpoint variable indicates the "selected"
TEC:
Ts =
Mode=
Ite=
Vte=
Figure 18
A Sample TEC Params Measurement Screen
Parameter 3
Actual Photodiode
Current (Im)
Actual Laser Diode
Current (Io)
Actual Laser Diode
Current (Io)
o
25.000
C
Temp
0.000 A
0.000 V
47
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