Fiber Optic Response Devices

Fibre Optic Response Devices (FORP) are all-plastic, non-magnetic and contain no electrical parts. The imaging unit has a variety of FORP devices. Theses connect via a fibre optic bundle to an interface unit located on the bench in the control room.

932 Interface Unit
The 932 Interface unit provides the connection between a response device and the stimulus computer. The 932 also interfaces the scanner trigger with the stimulus computer.

P1: DC Power Input
Connect only the CurDes PS-932  6 volt power supply to this jack. If you are not absolutely certain you have the right plug ask for help. Others may fit but could badly damage the interface.

P3: USB
Connect the stimulus computer to this USB jack. For push button devices, the 932 emulates a keyboard. The joystick appears as an HID joystick.

P5: Optical Port
Fibre optic cable bundles connect to this port. The other end of the fibre optic bundle connects to a response device. It is also possible to connect a response device directly to the optical port. If you do this you may need to recalibrate the 932. If you do, be sure to calibrate again after reconnecting through a fibre bundle.

P6: TTL Trigger Input
Connect the scanner trigger output to P6. The trigger signal comes from the technical room and then to an Philips interface box on the left end of the console desk. The output from the Philips interface box connects to P6.

Setup and Making Changes
If you change anything, please restore the before leaving.

To use a different computer, just unplug the USB cable from the back of the Shuttle computer and connect it to your laptop or other device.

Response devices can be plugged directly into the 932 or connected through a fibre optic bundle. We have both 8-fibre bundles and 12-fibre bundles. The 8-fibre bundles are for use only with a legacy interface we keep as a spare. There is a 12-fibre bundle that runs from the 932 through the underfloor waveguide and comes up at the front of the magnet bore.

If you change the response device or plug one of the 4 button devices directly into the 932, you may have to change settings on the 932 before it will work correctly.

Standard Configuration
The 932 is normally configured for use with a 4-button inline FORP and the Shuttle stimulus PC. The USB lead from the 932 is plugged into a USB port on the Shuttle PC. Be sure you the lead really is in a USB port and not one of the ethernet ports. The normal settings on the 932 are:
 * USB
 * Legacy Handheld)
 * HID KEY BYGRT

If you have changed the FORP or fibre bundle, you will also have to perform a manual calibration.

Changing modes
The two button box modes we use are HID KEY BYGRT and HID KEY NAR. In KEY mode, the 932 sends the key release code quickly after the key press code. The prevents the auto-repeat from filling up your program with multiple response. However your program will not be able to detect a participant holding down buttons. To do that, select NAR mode. NAR is No Auto Release.

To change modes first press the knob in, scroll to Yes and then press the knob again to choose Change Modes? Yes. Scroll down one line to Manual Config and press the knob again to select it. Scroll down the list until you reach Legacy Handheld. Press the knob to select Legacy Handheld. Press the knob again to select USB. From here you can finally choose the use mode. Scroll to either HID KEY BYGRT or HID NAR BYGRT and press the knob to select it.

Calibration
If one or more of the lights on the 932 fail to light up while pressing a button, try recalibration. Instructions are here --> http://www.curdes.com/technical/UserMode800

Response Devices
Our button boxes are HH-style and only work in legacy mode. The Joystick are PYKA are the newer HHSC type and can be used with auto configure.