Choosing A Location; Chopper Controller Connections; Figure 3: Chopper Synchronization Connections - Oriel LIDA-SRS-KIT User Manual

4.4 CHOOSING A LOCATION

Choose an installation location where the power requirements can be met for the system. Be sure
power is not applied to the system until the setup has been completed.
The environment should be that of a typical laboratory atmosphere, without excessive humidity
and contaminants in the air. Do not allow the ventilation holes on the system's components or its
computer to be blocked. Air should be able to circulate freely around the system.

4.5 CHOPPER CONTROLLER CONNECTIONS

A lock-in digital amplifier is capable of reading read chopped light signals from an optical detector.
Therefore, it is required to install the 75160NF Optical Chopper System. Install a wheel into the
chopper head based on the desired chopping frequency and beam size. When using a wheel with
more than two apertures, install the appropriate aperture disk supplied with the chopper head.
Use the cable supplied with the 75160NF to connect the chopper controller to the enclosed
chopper head. Refer to its user's manual for more details.
Connect one end of the BNC cable supplied with the LIDA to "TTL OUT" on the back of the
SR810. Connect the other end to "REF" on the front of the chopper controller. This allows TracQ
Basic software to control the chopping frequency through the LIDA. For signal reading accuracy,
the frequency must be synchronized between the LIDA and the chopper.
Family of Brands – ILX Lightwave

Figure 3: Chopper Synchronization Connections

• New Focus™ • Ophir
®
MLIDA, Rev A
• Corion • Richardson Gratings™ • Spectra-Physics
® ®