Vidia-Discrete
General Operation • 19
Enabling Local (Front-Panel) Control
When the laser receives a command from the computer interface, it
deactivates all of the front-panel controls except the
Laser Power
and
Local
buttons. This remote-control mode is indicated by the
Remote
LED on the front panel. To return the controller to local (front-panel)
control, press the
Local
button on the front panel.
Setting the Laser Power
Turn the
Power Adjust
knob to set the power.
To prevent damage to the laser diode, the factory has limited the
maximum current to the laser diode. When you reach maximum
power, the controller will engage the current limiter and the power
display will start to flash.
Maximum power is wavelength dependent. See page 65 for power specifications.
Setting the Laser Wavelength (Track Mode)
The Vidia-Discrete has two modes, track mode and scan mode. While
in track mode, you can actively control the tuning motor to operate the
laser at a set wavelength.
1.
If the laser is in scan mode (the LED in the
Track
button is off),
switch to track mode by pressing the
Track
button.
You cannot switch to track mode during a scan. Finish the current
scan or use computer control to abort the scan.
2.
Standard tuning resolution is 0.01 nm. For 0.001-nm resolution,
press the
Hi Res/Step
button while in track mode. The wave-
length display will shift two decimal places.
3.
Turn the
Wavelength Adjust
knob to set the wavelength. Turn
the knob clockwise to increase the wavelength: counter-clock-
wise to decrease the wavelength.
Note:
Note:
64X7 rev E.fm Page 19 Tuesday, April 3, 2001 4:16 PM
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