TT-AV Sync Sensor - Thought Technology, Ltd.
Contents
1. Begin a recording session in BioGraph Infiniti using the appropriate channel set and AV Sync Test Audio screen e Follow the on screen instructions e Use the USB Audio CODEC Volume control to adjust the Speaker volume as per the instructions to find the minimum acceptable volume e Make a note of this minimum setting and ensure that the volume is always set a little bit above this level e For most applications it is recommended that the volume be set to maximum and that a headset with adjustable volume control is used WINDOWS VISTA 1 Do one of the following Open Volume Mixer Playback Devices N e Click the Start button Select Control Panel Recording Devices In Control Panel click Sounds Sounds l lt 40 age e Or in the Taskbar Tray right click the Speaker icon and select Playback Devices shown above right a Sound 5 2 In Sounds window do the following ir Wegen 1 Select a playback device below to modify its settings Speakers Bluetooth H Speakers 2 Conexant High Definition Audio SPDIF Interface e nexant High Def Audio kin Speakers e Click the Playback tab e Select Speakers USB audio CODEC V shown right arrow 2 This is the AV Sync sound device driver ayac e Click the Properties button e Select the Levels tab TT AV Sync Sensor Installation and User Guide 15 3 Begin a recording session in BioGraph Infiniti using the appropriate channel2. 3 91 milliseconds or 2048 Hz sampling maximum error 0 49 milliseconds This sensor and any associated sensors depending on the application must always be connected to encoder inputs with the same sampling rate Associated sensors include the EEG Z SA9305Z and EEG Z3 SA7680Z for evoked and slow cortical potential averaging and the push button switch SA7660 for reaction time measurements Step 3 Setting sound defaults TT AV Sync Sensor Installation and User Guide 10 The first time you connect the AV Sync sensor to any given USB port on the PC the system will automatically install the correct device driver If you connect to a different USB port the system reinstalls the driver and this procedure must be followed again for this reason we recommend always using the same USB port Once the device driver has been installed MS Windows recognizes the AV Sync sensor as a sound device Before you use the AV Sync sensor for the first time you must set the sound defaults WINDOWS XP 1 Do one of the following AD OVE 12 17PM e Click the Start button From Settings select Control Panel In Control Panel double Sounds and Audio Devices Properties click Sounds and Audio Devices cae Sank OE e aes e Or in the Taskbar Tray right click the ei vent soe Speaker icon and select Adjust Audio Iesse v Properties shown above right ee Sound recording e Ss Default device 2 In Sounds and Audio Dev
3. be purchased and used to calibrate the output of the monitor being used Brightness and contrast settings can be adjusted to achieve the desired luminosity reading on the meter When changing these settings ensure that they remain within the functional boundary determined by the Video triggering verification outlined above TT AV Sync Sensor Installation and User Guide 16 Notes TT AV Sync Sensor Installation and User Guide 17 Never cut the fiber optic cable The ends should never be modified in any way Avoid shining bright light directly on the fiber optic cable and suction cup during use it may cause false triggering or cessation of operation Avoid sharp bends in the fiber optic cable less than 4 bend diameter Clean your monitor regularly as the suction cup can leave a small residue on the surface BioGraph will give messages indicating the status of AV Sync This includes the connection status the default audio device status and some other information These messages all relate to topics covered in this manual If any of them seem unclear please contact technical support Replay mode in BioGraph Infiniti does not require the AV Sync to be connected When replaying audio protocols without AV Sync the left speaker will play the audio stimulus while the right will play a loud tone This tone is the audio timing control tone Set the balance completely to the left to eliminate this tone during playback Multiple screens de
4. D or CRT monitor as well as the presence of audio signal output It produces highly accurate time locked trigger signals which can be read by software through the Procomp 5 ProComp Infiniti and FlexComp Infiniti encoders The sensor is connected to a PC which generates the audio and visual stimuli For sound stimuli the TT AV Sync operates as a secondary sound device and plays the audio events generated by the PC Sensor components Included in the TT AV Sync sensor kit T7670 are the following TT AV Sync sensor Fiber optic cable kit SA7671 shown right This brings video input to the sensor from a computer monitor The cable is specially prepared and should never be cut see section entitled Notes j for more information This kit is also available separately USB cable For connection of the sensor to a computer USB port Fiber optic cable kit SA7671 Sensor cables Connects the sensor to the encoder Two lengths are provided although only one cable is needed for operation Headphones These plug directly into the sensor to deliver audio stimuli to the subject PC requirements The following are particular to the use of the AV Sync sensor and should be considered in addition to those of BioGraph Infiniti TT AV Sync Sensor Installation and User Guide The use of the AV Sync sensor requires at least BioGraph v4 0 and may require a later version depending on the biofeedback screens employed For visu
5. TT AV Sync Sensor T7670 Installation and User Guide TT AV Sync i SA 7670 roe Q Y11234 Thowgtrt Techmotogy Ltd Thought Technology Ltd 2180 Belgrave Ave e Montreal Que Canada H4A 2L8 Phone 514 489 8251 Fax 514 489 8255 www thoughttechnology com TT AV Sync Sensor Installation and User Guide NI WARNING A Photosensitivity Due to the slight risk of inducing photosensitive epileptic seizures Thought Technology advises clinicians to proceed with caution when using repetitive EP ERP visual stimuli protocols with BioGraph Infiniti 5 0 Protocol Generator algorithm Evoked Potential screen instrument and the TT AV Sync sensor In most cases if a seizure due to photosensitivity is likely it will occur straightaway If a seizure appears to be starting the visual stimulus should be stopped immediately For more information please refer to guidelines provided by an organization such as the National Society for Epilepsy UK Epilepsy Foundation USA or Epilepsy Canada Manual SA7673 Rev 5 0 TT AV Sync Sensor Installation and User Guide 3 TT AV Sync Sensor Installation and User Guide Al Table Of Contents WARININ Gin ENEE 3 FUNCTIONAL DESCRIPTION 0 ccscceeceecceeceeceneceeceeccneceeccnsceceeseneceescuseueseeseneceesensenees 7 SENSOR COMPONENT Seria aa Si Eed ed had ge ee ee heel 7 PC REQUIREMENTS eccssccsccsecessceccnecesccescnetececnsncncenscnsncascnesnaccesstesenstusnnescuscosaceustsse
6. able method Thought Technology will not be responsible for items not received We will repair or replace your unit s that are still under warranty free of charge This warranty does not apply to damage incurred through accident alteration or abuse TT AV Sync Sensor Installation and User Guide 19 Returning Equipment Be sure to contact us for a return authorization number RA before returning any equipment 1 Send the unit s postage prepaid and insured with proof of purchase to one of the addresses below 2 If you are shipping from outside Canada and the USA to Canada label the package Goods to be repaired Made in Canada to avoid unnecessary customs charges All customs and duties charges will be billed to you if incurred by sending the unit without this label or to the wrong address 3 Provide a detailed description of the problem you are experiencing and your telephone fax number see form on the last page of this manual In the USA ship insured to Thought Technology Ltd Cimetra LLC 20 Gateway Drive Plattsburgh New York 12901 USA In Canada and all other countries contact your dealer or ship insured to Thought Technology Ltd 2180 Belgrave Avenue Montreal Quebec Canada H4A 2L8 Contact information for service re Cen Canada and International 1 514 489 8251 Se Cen USA 1 800 361 3651 Oo D service thoughttechnology com TT AV Sync Sensor Installation and User Guide 20 R
7. al stimuli protocols the use of two monitors with the Windows Desktop in dual monitor configuration is recommended Second monitor type CRT is recommended if maximum timing accuracy and precise luminosity are required When using an LCD monitor for visual stimuli it is recommended that the maximum brightness and contrast settings always be used Video card hardware memory should be a minimum of 64 MB 128 MB or more is recommended performance depends on size of bitmap images selected as visual stimuli in BioGraph Infiniti PC must support Microsoft DirectX DirectDraw DirectSound The necessary version is installed with BioGraph Infiniti Setup Instructions Ensure that the above PC requirements are met then follow these steps 1 e 9 Install the AV Sync test and calibration screens as per the following section Connect AV Sync as described in Connecting the sensor Configure audio settings as described in Setting sound defaults Perform audio and video calibration using BioGraph Infiniti as described in nitial settings configuration Step 1 Installing the AV Sync test and calibration screens If not yet done insert the CD entitled TT AV Sync Sensor Screens for Testing and Calibration and follow the onscreen instructions You will be asked to select your encoder from a list including FlexComp Infiniti ProComp Infiniti and ProCompd Infiniti If you use more than one of these encoders you may install onl
8. csausnane 7 SETUP INSTRU O TO N O a a aaa ANER Ee SERA e geed 8 STEP 1 INSTALLING THE AV SYNC TEST AND CALIBRATION SCREENS 8 STEP 2 CONNECTING THE SENSOR 8 STEP 3 SETTING SOUND DEFAULTS s esssoeeeseoeosseoreretotttetttttet otteet otteet ressorts e troes etroseeroseorensse 10 STEP 4 INITIAL SETTINGS CONFIGURATION ccccccccccccccsssssssecccccscesssusescccscssesseesseeccssscssueeenesssess 13 ADVANCED CALIBRATION icccccsccccccecccecccccaccnscecccosccecesccsscceconscesccscccecssueascesconccasccevecss 16 AUDIO INTENSITY CALIBRATION 16 VIDEO LUMINOSITY CALIBRATION oanoanaa a e a E T A a A ao aia Ta 16 NOTES EECH 17 DEVICE SPECIFICATIONS 0 ccccceecscccnssescceecnesceccnennecenssnesceccnsenssensnnssneccosnnencassnsseaees 18 PL AGING ORDERS cevscescc coscvceu co vccascchcccseacucscaua cu sicavechcccaceceasineneescuscocscovtcadesuasacesatncccste 19 TECHNICAL SUPPORT EEN 19 WARRAN DY EE 19 RETURNING EQUIPMENT 2 2 cecceecceeceecceccneceeceneceeceeseeeceeccueceeceasensceesenseueseeseneseeses 20 REPAIR RETURN FORM 0 ccscceeceecceeceecceeeeeceeccneceeceeseneceescneceeseuseeseeesenseeesenseneeeees 21 TT AV Sync Sensor Installation and User Guide 5 TT AV Sync Sensor Installation and User Guide ol Functional Description The TT AV Sync sensor provides accurate stimuli timing required during evoked potential slow cortical potential and reaction time protocols It detects changes in light emitted from a LC
9. epair Return Form Be sure to contact us for authorization before returning any equipment Remove this sheet and include with returned unit s Include copy of original invoice and return to the address in the Returning Equipment section Name Company Address Phone No Fax No Date Purchased From Whom Model Name Serial Number Problem TT AV Sync Sensor Installation and User Guide
10. er then BioGraph Infiniti and to disable any background software that may begin running sporadically and spontaneously e g screen saver instant messenger etc Device Specifications Specification Value Audio detection accuracy lt 200pUs silence to sound transition Audio detection recovery lt 200ms sound to silence transition Not intended for sound to silence detection Audio headphone impedance 16Q single headphone 8Q dual headphones Visual trigger delay time black to white lt 200us Visual trigger recovery time white to black lt 150ms Not intended for white to black detection Isolation PC side to encoder side 4kV VAC rms TT AV Sync Sensor Installation and User Guide Placing Orders Outside USA Tel 1 514 489 8251 Fax 1 514 489 8255 In USA Toll Free Tel 1 800 361 3651 E Mail mail thoughttechnology com Or contact your local authorized distributor Technical Support Outside USA Tel 1 514 489 8251 Fax 1 514 489 8255 In USA Toll Free Tel 1 800 361 3651 E Mail techsupport thoughttechnology com Or contact your local authorized distributor Warranty The AV Sync sensor is guaranteed to be free from defects in material and workmanship for 1 year from the date of purchase In the unlikely event that repair is necessary contact Thought Technology Ltd to receive a Return Authorization number Then send the unit back by a trace
11. g triggers If software volume control is desired it is recommended that this level be found during a session test see section entitled Audio Triggering Verification For best results set these volumes to maximum and use a headset or speakers with adjustable volume control To finish editing settings and keep your changes press Apply then OK WINDOWS VISTA 1 Do one of the following 2 In Sounds window do the following TT AV Sync Sensor Installation and User Guide 12 Open Volume Mixer Click the Start button Select Control Panel In Control Panel click Sounds Playback Devices N Recording Devices Or in the Taskbar Tray right click the Sounds l Speaker icon and select Playback Devices SEA Aae shown right SN Sound ez Playback Recording Sounds 1 Select a playback device below to modify its settings Click the Playback tab Speakers Bluetooth Hands f Select Speakers USB audio CODEC shown right arrow 2 This is the AV Sync sound device driver Speakers Conexan SPDIF Interface onexant High Definitio ayo Click the Properties button Select the Levels tab Set the volume level to maximum shown below and click OK e 1 Speakers Properties General Levels Enhancements Advanced Speakers 0 100 ail Balance Select the original PC sound card this should be called Speakers followed by the name of your PC sound card sh
12. he short strip shown below gt c Clean the computer monitor with an appropriate product or a soft cloth dampened with plain water always with the monitor turned off d Slightly moisten the suction cup distilled or natural source water is recommended and attach it to the monitor shown right Standard placement is halfway between top and bottom of the monitor along its leftmost edge You can later adjust the location of the fiber optic cable using the AV Sync Test Video 1 screen in BioGraph Infiniti e Connect the hook and loop on the fiber cable to the hook and loop strip on the back of the monitor Adjust cable length as desired Radius of curvature should be no smaller than the one shown above TT AV Sync Sensor Installation and User Guide 9 4 5 Insert the other end of the fiber optic cable into the AV Sync sensor Connect the AV Sync sensor to the encoder using a sensor cable Depending on the type of stimulus you can choose Video only Audio only or Mixed The Mixed output is useful for protocols in which stimuli can be either audio video or both In certain cases however using the mixed output with audio only protocols can lead to false triggers caused by the video input from the fiber optic In general this connection should match the protocol type being used Note The AV Sync sensor is accurate to within 1 sample and can be connected to any encoder input with 256 Hz sampling maximum error
13. ices do the A USB Audio CODEC following MIDI music playback o Click the Audio tab ees SW Synth Volume About e In Sound playback select USB audio CODEC as the default device shown right This is the AV Sync sound device driver Use only default devices ox Cancel Apply Note Click the Volume button for the Sound playback Default device Set both the Speaker and the Wave volumes to maximum and close the volume dialog box SW Synth CD Player Balance g 4e J 4 Volume USB Audio CODEC Set the default device back to the original PC sound card This should be done wherever the USB audio Codec is selected as the default device This is normally in the following areas i Audio Tab Sound playback and Sound recording ii Voice Tab Voice playback and Voice recording The previous steps ensure that AV Sync plays and triggers on audio stimuli while allowing regular PC and BioGraph feedback audio to be played through the original PC sound card and hence speakers or headphones connected to the PC audio jacks Windows will retain these settings as long as you continue to use the same USB port Important The speaker volume also controls the output of the audio stimuli This setting can be TT AV Sync Sensor Installation and User Guide 11 lowered but there is a level below which the AV Sync will no longer produce timin
14. io or video settings are modified These tests can be performed using the AV Sync test files for BioGraph Infiniti and after connecting and configuring AV Sync as described above AV Sync test files FlexComp Infiniti Channel set Fl AV Sync Test ProComp Infiniti Channel set PI AV Sync Test ProCompd Infiniti Channel set P5 AV Sync Test Screens AV Sync Test Video 1 AV Sync Test Video 2 AV Sync Test Audio Video triggering verification As ambient lighting may interfere with this verification it is recommended that the following video tests be performed with minimal ambient lighting In some cases it may be required to turn off all ambient lighting These video tests serve to verify the limits of operation of the sensor Ambient lighting should not affect normal operation of AV Sync although shining direct light on the fiber optic cable and suction cup TT AV Sync Sensor Installation and User Guide 13 should be avoided For more information on proper usage of the fiber optic cable see the Notes section of this document 1 Begin a recording session in BioGraph Infiniti using the appropriate channel set and the AV Sync Test Video 7 screen e Follow the on screen instructions This test will help to adjust the position of the fiber optic cable on the monitor to ensure proper operation 2 Begin a recording session in BioGraph Infiniti using the appropriate channel set and the AV Sync Test Video 2 scree
15. n e Follow the on screen instructions This test will serve to find the limits of the brightness and contrast settings to ensure proper operation Audio triggering verification Below a certain software volume setting the AV Sync will stop producing triggers for audio stimuli To find the minimum setting follow these steps WINDOWS XP 1 Do one of the following e Click the Start button and from Settings select Control Panel When Control Panel opens double click Sounds and Audio Devices e Or in the Taskbar Tray right click the Speaker icon and select Adjust Audio Properties shown right 2 In Sounds and Audio Devices do the following e Click the Audio tab Sounds and Audio Devices Properties PR Volume Sounds Audio Voice Hardware e Switch the Sound playback default ES device to USB audio CODEC shown TEE right This is the AV Sync sound device Lyme JL sees 3 Sound recordin driver A SE 7 USB Audio CODEC e Click the Volume button for the Sound H MIDI music playback playback Default device tera Beie Microsoft GS Wavetable SW Synth e Leave the Volume control open and cS ensure that the status bar indicates USB e Audio codec TT AV Sync Sensor Installation and User Guide 14 e Switch the Sound playback default device back to the original PC sound device e Click OK to close the Sounds and Audio Devices dialog box the Volume control window should remain open 3
16. own above right arrow 1 Click the Set Default button Afterwards the icon for this device should have a green check mark next to it This means your original PC sound card is now the default sound device as it should be Note The previous steps ensure that AV Sync plays and triggers on audio stimuli while allowing regular PC and BioGraph feedback audio to be played through the original PC sound card and hence speakers or headphones connected to the PC audio jacks Windows will retain these settings as long as you continue to use the same USB port Important The speaker volume also controls the output of the audio stimuli This setting can be lowered but there is a level below which the AV Sync will no longer produce timing triggers If software volume control is desired it is recommended that this level be found during a session test see section entitled Audio Triggering Verification For best results set these volumes to maximum and use a headset or speakers with adjustable volume control e To finish editing settings and keep your changes click OK Step 4 Initial settings configuration Variations in video and audio settings monitor brightness or playback volume for example could potentially disable the AV Sync sensor s operation Furthermore incorrect video settings could introduce undesirable timing delays For these reasons we recommend briefly testing the AV Sync sensor prior to first use It should be tested again if aud
17. set and AV Sync Test Audio screen e Follow the on screen instructions e Use the Speakers Properties Levels control to adjust the Speaker volume as per the instructions to find the minimum acceptable volume r Speakers Properties x General Levels Enhancements Advanced Speakers _ 0 75 Wil Balance e Make a note of this minimum setting and ensure that the volume is always set a little bit above this level e For most applications it is recommended that the volume be set to maximum and that a headset with adjustable volume control is used Advanced calibration Audio intensity calibration The AV Sync and associated software features for audio stimuli presentation do not provide a means to set audio intensity level If an exact level of intensity is required for audio stimuli protocol an off the shelf decibel dB meter can be purchased from an electronics store and used to calibrate the AV Sync audio output The procedure outlined above in section Audio triggering verification can be used to adjust the audio volume to the desired level on the dB meter This method can also be used simply to control the audio stimuli volume during a session As mentioned above knowledge of the minimum functional volume is important to ensure proper operation Video luminosity calibration Similarly if an exact level of luminosity is required in a visual stimuli protocol an off the shelf light meter can
18. signed for use with AV Sync should not be loaded within BioGraph at the same time Ideally only the screen used to run a live session with AV Sync should be loaded on its own Disconnecting the AV Sync during a recording session may cause BioGraph Infiniti to crash or hang Refrain from disconnecting AV Sync during a live session Important note about visual stimuli presented in full screen mode When an application is playing a video in full screen mode and another application is selected Windows XP will automatically minimize the full screen video even if the application selected is in the primary monitor and the full screen video is in the secondary When this video is part of an AV Sync visual protocol in BioGraph Infiniti this behaviour can cause premature termination of the protocol in the worst case and false triggers in the session in the best case BioGraph Infiniti has been designed to automatically correct for this behaviour by forcing the full screen video back into maximized state It will also automatically place a rejection segment in the session at the time of the error This will continue until focus is returned to BioGraph Infiniti When this happens the best thing to do is use Alt Tab to return to BioGraph Infiniti The user can also minimize the programs that have taken focus Selecting BioGraph from the taskbar will not correct the problem It is recommended when running sessions with AV Sync to close all other programs oth
19. y one of the choices The tests are the same for all encoder types AV Sync is not compatible with ProComp 2 or any TTL encoder other than those mentioned above Step 2 Connecting the sensor TT AV Sync Sensor Installation and User Guide 8 Fiber optic cable kit Secondary audio jack TT AV Sync WM ml rots SA 7670 Sensor cable Fisauphione JACK m Q Deg Kg connection to ae gt Mixed ProComp or USB cable to PC ig E Aidioonly uP Thought Technotogy Ltd 1 Connect the sensor to the PC using a USB cable This powers the sensor and carries sound signals from the PC to the sensor We recommend that you consistently use the same USB port on your PC Note If this is the first time you have connected the sensor to a particular USB port this step will cause automatic installation of the default drivers 2 Plug headphones into the headphone jack These are used to provide audio stimuli to the subject For additional monitoring the secondary audio jack can be used Connect a second pair of headphones or the PC speakers to the secondary jack In both cases the use of non powered headphones or speakers is recommended 3 Connect the fiber optic screen attachment as follows AV Sync is best used on the second monitor of a dual monitor configuration a Attach the long strip of the hook and loop fastener to the back of your computer monitor shown right b Thread the fiber optic cable through the grommets on t
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