Hinds Instruments PEM-100, User Manual

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Chapter 6: Operating the PEM-100 Controller
36 PEM 100 User Manual
Factory Default Parameters
The PEM-100 controller is programmed at the factory with default settings of
Wavelength = 632.8 nm and Retardation = 0. 25
λ. These settings are overwritten
as desired by the user but they can be restored through the Sys. Config. then
Restore Defaults menu path.
Setting Front Panel Parameters
The following operating parameters may be set from the PEM-100 Controller front
panel.
Local Control Mode
•
Wavelength of light (input to controller)
•
Display of wavelength units (nm, µm, 1/cm)
•
Retardation
•
Display of retardation units (
λ, rad, º)
•
Frequency harmonic (1f or 2f)
•
Frequency Units (Hz, kHz)
Voltage Control Mode
•
VControl
•
Frequency harmonic (1f or 2f)
•
Frequency Units (Hz, kHz)
Setting Wavelength
For most experimenters, the most useful units of retardation are phase units (waves,
radians, and degrees). The controller requires the user to input the wavelength of
light being used so that the proper electrical signal may be set to the modulator
head.
The following wavelength settings are accessed from within the Local Control Mode.
To set the controller to a different wavelength:
1. Arrow to WAV and press the ENTER button.
2. Using the numerical buttons, enter the desired wavelength.
3. Press the ENTER button to have the controller change the setting to the new
wavelength value.