Brain Products BrainAmp ExG MR Operating And Reference Manual

www.brainproducts.com

BrainAmp MR

For the models

BrainAmp MR

BrainAmp MR plus

BrainAmp ExG MR

Operating and Reference Manual

for use in an MR environment

Copyright

Any trademarks mentioned in this document are the protected property of their rightful owners.

The reproduction, distribution and utilization of this document as well as the communication of its contents to

others without express authorization is prohibited. Offenders will be held liable for the payment of damages. All

rights reserved in the event of the grant of a patent, utility model or design. Subject to change without notice.

For the latest version of this document, please visit www.brainproducts.com or contact your local distributor.

Published by Brain Products GmbH

Zeppelinstrasse 7

82205 Gilching

Germany

Phone: +49 (0) 8105 733 84 - 0

Fax: +49 (0) 8105 733 84 - 505

Web: www.brainproducts.com

Published on* September 29. 2016 Document version 019

*Valid until publication of a new version of this document.

BrainAmp MR | Operating and Reference Maual for use in an MR environment

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BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

List of figures .................................................................................................................................................. 5

About this manual ........................................................................................................................................ 7

The structure of the manual ............................................................................................................................. 7

Who is the manual intended for? .................................................................................................................... 8

Conventions used in this manual .................................................................................................................... 8

Document revision history .............................................................................................................................. 9

Reporting errors and support .......................................................................................................................... 9

Acknowledgments ...................................................................................................................................... 11

Introduction ................................................................................................................................................ 13

Intended use ................................................................................................................................................. 14

Correct use .................................................................................................................................................... 14

Use together with other products and components ........................................................................................ 15

Chapter 1 Installation instructions for the conduct of combined EEG-fMRI measurements .............................. 17

1.1 Synchronizing the systems using the SyncBox ................................................................................ 17

1.2 Recording volume triggers (volume markers) using the trigger cable ............................................... 23

1.3 Conversion of optical trigger pulses ................................................................................................ 24

1.4 Functional test of the interfaces of the scanner and amplifier system .............................................. 25

Chapter 2 Preparing and operating the amplifier system in an MR environment ............................................... 27

2.1 Safety aspects of combined EEG-fMRI measurements .................................................................... 29

2.1.1 Recommended coil configuration for combined EEG-fMRI measurements (head transmitter coil vs. body

transmitter coil) ............................................................................................................................. 30

2.1.2 MR sequences and the safety of the test subject ............................................................................. 31

2.1.3 Protecting the amplifier in the MR environment ............................................................................... 33

2.2 Considerations on positioning the components for combined EEG-fMRI measurements .................. 35

2.3 Correct use of the connections to the amplifier from the test subject: BrainCap MR, electrode input box-

es and MR electrodes ..................................................................................................................... 39

2.3.1 EEG recordings using the BrainCap MR ........................................................................................... 39

2.3.2 Electromyographic recordings (EMG-fMRI) ....................................................................................... 40

2.3.3 Electrocardiographic recordings (ECG-fMRI) .................................................................................... 42

Contents

4

2.3.4 GSR-MR recordings (GSR-fMRI) ........................................................................................................ 45

2.4 Considerations on data quality for combined EEG-fMRI measurements ........................................... 47

2.5 Care and comfort of the test subject during combined EEG-fMRI measurements .............................. 50

2.6 Emergency measures ...................................................................................................................... 52

2.6.1 Emergency measures to release the test subject ............................................................................. 52

2.6.2 Measures in the event of an amplifier system malfunction or fault .................................................. 53

Appendix A Product identification ............................................................................................................................... 55

Appendix B Explanation of the markings on the products ........................................................................................ 57

Appendix C Phantom measurements in MR environments ....................................................................................... 59

Appendix D Using temperature measurements to verify that the study is set up safely ...................................... 61

Appendix E Guidelines on the safe conduct of combined EEG-fMRI measurements ............................................. 63

1 Head coil geometry ......................................................................................................................... 63

2 Further head coil characteristics .................................................................................................... 66

3 Stabilization of the test subject ...................................................................................................... 67

4 Sequences ...................................................................................................................................... 67

5 Static gradient field ....................................................................................................................... 68

6 Scanner types/manufacturers ........................................................................................................ 68

7 EEG amplifiers and accessories ..................................................................................................... 68

8 EEG cap .......................................................................................................................................... 79

9 Number of EEG channels ................................................................................................................. 79

10 Training of new personnel ............................................................................................................... 79

11 General rules of conduct ................................................................................................................ 80

12 Particular attention/supervision is required in the case of ............................................................. 80

Appendix F Elimination of errors and sources of interference ................................................................................. 81

Appendix G Recommended reading ............................................................................................................................ 83

General list of abbreviations ......................................................................................................................... 85

List of abbreviations for the cited MR sequences and methods .................................................................... 87

Subject index ............................................................................................................................................... 89

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BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

Chapter 1 Installation instructions for the conduct of combined EEG-fMRI measurements

1-1 Connections between the SyncBox Main Unit, SyncBox Scanner Interface, amplifier and scanner 19

1-2 SyncBox Scanner Interface with cables connected (top view) 20

1-3 SyncBox Scanner Interface (side view), yellow "PWR" LED (left) and "Input" port for connection to the

scanner (right) 21

1-4 SyncBox Scanner Interface (side view), green "Signal" LED (left) and "Output" port for connection to

the SyncBox Main Unit (right) 21

1-5 SyncBox Main Unit with cables connected (top view) 21

1-6 SyncBox Main Unit (side view), "Input" port for connection to the SyncBox Scanner Interface (left) and

"AUX" socket for peripheral components (right) 22

1-7 SyncBox Main Unit (side view), "AUX" socket for connection to the USB2 Adapter (left) and "USB"

socket for connection to the computer (right) 22

1-8 "Sync On" markers and (example) volume markers in the EEG data (Recorder) 25

Chapter 2 Preparing and operating the amplifier system in an MR environment

2-1 Ribbon cable with burnt area caused by incorrect cable routing (loop) 29

2-2 Schematic representation of an RF field in a body RF coil 30

2-3 Schematic representation of an RF field in a local RF coil 30

2-4 Incorrect handling: burnt-out amplifier board due to open channels 33

2-5 Positioning of the amplifier and the PowerPack on the scanner table in a local RF transmitter coil (head

coil) 36

2-6 Positioning of the amplifier and the PowerPack on a platform in the scanner bore in a local RF trans-

mitter coil (head coil) 37

2-7 Body transmitter coil, positioning of the amplifier and the PowerPack behind the scanner bore on a

non-magnetic surface 38

2-8 Schematic representation of the correct way to position the BrainAmp ExG MR, PowerPack and ExG

AUX Box for a combined EMG-fMRI measurement on the limbs 41

2-9 Attaching the ECG electrode to the thorax 43

2-10 Attaching the ECG electrode to the back 44

2-11 GSR-MR module (top view) 45

2-12 GSR-MR module with connection to ExG AUX Box (side view) 45

2-13 GSR-MR module with connections for the GSR-MR electrodes (side view) 46

2-14 Configuration of the Recorder workspace 48

2-15 Clamps on the connection cables of the amplifier and cap 52

List of figures

6 List of figures

Appendix A Product identification

Appendix B Explanation of the markings on the products

Appendix C Phantom measurements in MR environments

Appendix D Using temperature measurements to verify that the study is set up safely

D-1 Results of temperature measurement, Siemens TIM Trio with 12-channel head receiver coil and body

transmitter coil 62

Appendix E Guidelines on the safe conduct of combined EEG-fMRI measurements

E-1 Open head coil 63

E-2 Head coil adapted for EEG recordings 64

E-3 Head coil with side opening 65

E-4 Closed head coil 66

E-5 Stabilization of the test subject in the head coil 67

E-6 Positioning of the EEG amplifier at the head end of the scanner outside of the bore 69

E-7 Positioning of the EEG amplifier at the head end of the scanner inside the bore 69

E-8 Positioning of the ExG amplifier at the foot end of the scanner 70

E-9 Positioning of EEG and ExG amplifiers for parallel use 71

E-10 Taut, straight cable routing 71

E-11 No loops or kinks 71

E-12 Positioning of the EEG amplifier inside the scanner bore 72

E-13 Weighting down the EEG amplifier with sandbags 73

E-14 Positioning of the EEG amplifier and accessories for GSR-fMRI 74

E-15 Positioning of the GSR-MR module 74

E-16 Attachment of the GSR-MR electrodes 75

E-17 Positioning of the amplifier when the 3D Acceleration Module is used 76

E-18 Attachment of the EMG electrodes to the arm 77

E-19 Attachment of the EMG electrodes to the leg 77

E-20 Attachment of the ECG electrode 78

E-21 Attachment of the EOG electrode 79

Appendix F Elimination of errors and sources of interference

Appendix G Recommended reading

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BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

About this manual

This Manual describes how to use the BrainAmp MR, BrainAmp MR plus and BrainAmp ExG MR

amplifiers and their accessories

1

in an MR environment.

The manual forms an integral part of the amplifier system. It must be precisely adhered to in

order to ensure that the amplifier system is used as intended (see the combined Operating and

Reference Manual for the BrainAmp and BrainAmp MR series of amplifiers) and operated cor-

rectly and to guarantee the concomitant safety of test subjects, users and third parties. Make

sure that this manual is always available to users.

The amplifiers are operated using the BrainVision Recorder recording software. You will find a

detailed description of the hardware functions that are fully software controlled (impedance

measurement, DC offset correction, configuration of the digital ports, setting of the resolution

and configuration of the filters) in the User Manual for the Recorder.

The structure of the manual

The BrainAmp MR Operating and Reference Manual describes the use of the amplifier system

in an MR environment:

 Chapter 1 describes the installation steps that are required if you only want to perform

combined EEG-fMRI measurements.

You will find a detailed description of the additional installation steps that have to be per-

formed in order to be able to operate the amplifiers in the BrainAmp Operating and Refer-

ence Manual for use in laboratory environment.

 Chapter 2 contains stipulations on how to perform combined EEG-fMRI measurements

safely with the amplifier system.

 Appendix C contains notes on how to perform phantom measurements.

 Appendix D describes how to check the experimental setup using temperature measure-

ments.

 In Appendix E, you will find guidelines intended to help you carry out your measurements.

 Appendix F contains a list of the most frequent sources of problems and interference.

 Appendix G contains a list of the recommended scientific literature.

 Appendix B lists the markings applied to the products.

1. The amplifiers and the accessories supplied by Brain Products are referred to as the "amplifier sys-

tem" below.

8 About this manual

Topics covered by the Brain-

Amp Operating and Reference

Manual for use in laboratory en-

vironment.

For further information on the following points, please refer to the BrainAmp Operating and Ref-

erence Manual for use in laboratory environment which is available for download from our web

site at http://www.brainproducts.com/downloads.php:

 Intended use

 Additional installation steps that you must perform in order to be able to operate the am-

plifiers of the BrainAmp MR series

 Maintenance and disposal

 Terms of warranty

 Product identification, relevant standards and legal notes

 Technical data and conditions of use

 Pinouts

 Ordering codes

Who is the manual intended for?

The current manual is intended for physicians, medical experts and users working in the field

of psychological and neurological research. If the system is to be used in an MR environment,

knowledge of how to perform MR measurements safely is vital.

Conventions used in this manual

This manual uses the following typographical conventions:

Italic Italic text is used to identify menus, menu commands, dialog boxes, options,

the names of files and folders and the labels on the products. Italic font is

also used to highlight portions of running text.

Underscore

Underscored text indicates a cross-reference or a web address.

 The blue dot indicates the end of a chapter.

9

This manual also uses the following symbols to help you find your way around:

The Personal injury symbol indicates that incorrect use of the products may

result in a health hazard to the test subject, the user and/or a third-party. In-

correct use means non-adherence to the stipulations set out in this manual.

The Damage to property symbol indicates that the incorrect use of the prod-

ucts may bring about a risk of damage to property.

The Stop symbol indicates that you should not carry out a particular action.

A note draws your attention to important (technical) information.

A cross-reference refers to another section or an external document that has

a bearing on the running text at this point.

A tip gives you advice, recommends a particular approach or draws your at-

tention to an interesting aspect.

Document revision history

57 modified Markings on the product (NRTL discontinued)

Reporting errors and support

We would ask you to report to us without delay any error you find in this manual, any fault in

the products or any malfunction that you observe when operating the products and any event

where a test subject, user or third party has been injured, however slightly, or could have been

injured. To do so, contact your dealer who can also advise you about general questions relating

to these products. 

10

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BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

Acknowledgments

At this point, we should like to extend our very sincere thanks to Dr. David Carmichael (Univer-

sity College London) and Dr. Helmut Laufs (Johann Wolfgang Goethe-Universität Frankfurt am

Main) for their careful review of these Operating Instructions, their constructive comments and

valuable scientific expertise.

We should also like to thank Dr. Robert Störmer (Brain Products GmbH) for his commitment

and for contributing his expert knowledge during the authoring of these Operating Instructions

as well as Ms. Katja Wust (Brain Products GmbH) who handled the editorial aspects involved

in their production.

Finally, we should also like to thank our translators, Phil White and Tim Pownall, for their ex-

cellent work.

Alexander Svojanovsky,

General Manager, Brain Products GmbH 

12

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BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

Introduction

The BrainAmp MR, BrainAmp MR plus and BrainAmp ExG MR amplifiers are easy to use, com-

pact and robust. Together with their accessories, the amplifiers form a complete, integrated

system. When used correctly, according to its intended purpose, the amplifier system guaran-

tees excellent data quality and the very highest level of comfort and safety for users and test

subjects alike.

When our BrainAmp MR series of amplifiers was launched in 2000, it undoubtedly represented

a technical milestone. Over the years, combined measurement of EEG and MR data became in-

creasingly widespread in the field of neurophysiological research. Initially the domain of a few

very technically oriented specialists who were implementing niche applications with the am-

plifier system, combined EEG-fMRI measurements now rank among the established methods

in the fields of neurophysiology and psychophysiology. A large number of neuroscientists are

successfully using laboratory paradigms in an MR environment and MR specialists are leverag-

ing the value of the primary MR applications by the addition of electrophysiological measure-

ments. The current manual has been written for this target group.

This manual is the result of many years of experience in using our amplifier system profession-

ally. They reflect the dramatic changes that have affected MR technology over the past years.

The use of body transmitter coils in place of head transmitter coils and the use of ever greater

field strengths are but two examples. The manual therefore not only describes the functions

and use of the components that make up the complete system. It is, above all, also intended

to provide users with safety guidelines for preparing and performing combined measurements

in MR scanners.

For notes on the intended use of the amplifier system, please refer to the BrainAmp Operating

and Reference Manual for use in laboratory environment which is available for download from

our web site under the following link: http://www.brainproducts.com/downloads.php.

14

Intended use

The components of the BrainAmp family are intended to be used for acquiring neuro-/electro-

physiological signals (e.g. EEG, EMG, ECG, EOG or signals from other approved sensors) in the

context of non-medical applications in order to carry out fundamental or applied research on

the basis of neurophysiological methodology and data.

In particular, the acquisition of invasive EEG signals is permitted if

 the acquisition is performed outside the MR environment,

 the BrainAmp components are powered by the PowerPack (rechargeable battery),

 no other product is electrically connected with the test subject at the same time, and

 no simultaneous electrical stimulation is used.

Invasive electrodes must not be used for recording ECG signals and polygraphic signals with

the BrainAmp components.

The components of the BrainAmp family are not medical devices. Use for diagnosis, therapy,

monitoring of vital physiological processes (such as cardiovascular functions) or other medical

purposes is expressly forbidden.

Correct use

The components of the BrainAmp family are permitted to be used by users in the psychological

and neurophysiological research area as well as physicians and medical experts for non-med-

ical applications.

The components of the BrainAmp family are not permitted to be used by unqualified persons

(e.g. laymen), persons who cannot read (e.g. due to visual impairment) or understand (e.g. due

to a lack of language skills) the manual.

The components of the BrainAmp family are permitted to be used in the following environ-

ments: hospitals, clinics, other medical environments, research institutes and other non-med-

ical environments (e.g. at home), provided that all the other stipulations regarding the correct

use are met and that the products are used in accordance with its intended use.

The components of the BrainAmp family are not permitted to be used in the following environ-

ments:

 vicinity of explosive gases as may be the case in operating theaters, for example,

 oxygen enriched atmospheres,

15



underwater (e.g. sea, swimming pool, bath tub) or in environments in which significant

amounts of water could enter the components of the BrainAmp family (e.g. under shower,

under water-tap).

The components of the BrainAmp family are permitted to be used for healthy and sick adults,

children and animals.

Irrespective of any liability on the part of the manufacturer, the relevant national stipulations

for operators and other relevant national legislation must be observed.

The user is solely liable for any risks to subjects associated with the investigation, if the prod-

uct is not used in accordance with the correct use described.

Use together with other products and components

The components of the BrainAmp family may be combined with the following products and

components:

For use in and outside of MR scanner rooms:

Product Manufacturer

GSR-MR Module Brain Products GmbH

RespirationBelt MR Brain Products GmbH

3D Acceleration Sensor Brain Products GmbH

ExG AUX Box Easy Cap GmbH

BrainCap MR

(passive Ag/AgCl EEG electrodes/caps for MRI)

Easy Cap GmbH

Electrode gel or paste Easy Cap GmbH

(others on request)

MR scanner

a

a. MR scanner room only.

Siemens, GE, Philips, Bruker

16

In addition to this general overview of the permitted combinations, users must also check that

all the conditions applicable to the product in question (e.g. relating to MR compatibility) are

fulfilled for the specific combination and specific application (definition of purpose and in-

tended use).

If users combine products other than those listed here then they are responsible for ensuring

the safety of test subjects, operating personnel and the environment. If the product data does

not immediately make it clear that products can be combined (connected) without danger then

the user must contact the relevant manufacturers to ensure that the required safety of all the

products involved is not compromised by the intended connection. 

Not for use in MR scanner rooms

Product Manufacturer

Passive Ag/AgCl EEG electrodes/caps that are not designed for

use in MRI (e.g. Multitrodes/BrainCap)

EasyCap GmbH

(others on request)

actiCAP active EEG electrodes (incl. SplitterBox and ControlBox) Brain Products GmbH

Electrode Input Box EIB 64 (32 and 64 referential channels) Easy Cap GmbH

ExG Input Boxes (with 16 bipolar ExG channels) Easy Cap GmbH

MOVE (transmitter and receiver) Brain Products GmbH

StimTrak Brain Products GmbH

Temperature sensor Becker Meditec

TriggerBox & TriggerBox Extension Brain Products GmbH

Photo sensor Brain Products GmbH

Respiration Belt Brain Products GmbH

Software (on a computer [not to be located in MR scanner room])

Product Manufacturer

BrainVision Recorder Brain Products GmbH

BrainVision RecView Brain Products GmbH

actiCAP ControlSoftware Brain Products GmbH

Requirements to the computer (not to be located in MR scanner room)

The computer to which you connect the amplifier (via the USB adapter) must fulfill the IEC

60950-1 or EN 60950.

17

BrainAmp MR Operating and Reference Manual for use in MR environment | Version 019 | September 29, 2016

Chapter 1 Installation instructions for the conduct of combined EEG-

fMRI measurements

This chapter describes the installation steps that are required if you only want to perform com-

bined EEG-fMRI measurements. These mainly relate to the establishment of the interfaces to

the scanner. On the one hand, these interfaces synchronize the systems using the SyncBox

and, on the other, serve to allow simultaneous recording of volume triggers provided by the

scanner.

You will find a detailed description of the additional installation steps that have to be per-

formed in order to be able to operate the amplifier system in the BrainAmp Operating and Ref-

erence Manual for use in laboratory environment. (This also indicates the installation

procedure to be followed if you only want to use your MR amplifier under laboratory condi-

tions.) This is available for download from our web site at http://www.brainproducts.com/

downloads.php.

The amplifiers are operated using the BrainVision Recorder recording software. Make sure that

the most recent version of the Recorder is installed on your computer. If you need it, the most

recent version can be downloaded from our web site under the link http://www.brainprod-

ucts.com/downloads.php.

You will find information on

the software configuration for

the SyncBox in the Recorder

User Manual.

The technical data for the

SyncBox can be found in the

BrainAmp Operating and Ref-

erence Manual for use in lab-

oratory environment.

1.1 Synchronizing the systems using the SyncBox

The SyncBox is used in order to synchronize the sampling rate of the amplifier with the scanner

clock system. The aim is to achieve phase synchronicity between the two clock systems. Only

in this way is it subsequently possible to achieve optimum correction of the artifacts in the EEG

data that are caused by the scanner.

The SyncBox system comprises the SyncBox Main Unit (see Figure 1-5 on page 21) and the Syn-

cBox Scanner Interface (interface between the Main Unit and the MR scanner, see Figure 1-2 on

page 20).

The SyncBox Scanner Interface directly receives pulses coming from the scanner's gradient

clock board. It is equipped with two BNC connector plugs. (Siemens scanners do not use BNC

connectors and require a special adapter that is supplied with the SyncBox.)

The SyncBox system is not suitable for use in an MR environment. You must therefore

always use the SyncBox Main Unit and the SyncBox Scanner Interface outside the scan-

ner room.

Always route the cables to the SyncBox Main Unit and the SyncBox Scanner Interface outside

the scanner room.

A physical connection must be established between the SyncBox Scanner Interface and a suit-

able clock signal output from the scanner in order to use the SyncBox.

18 Chapter 1 Installation instructions for the conduct of combined EEG-fMRI measurements

The SyncBox Scanner Interface galvanically isolates the SyncBox Main Unit from the scanner

in order to prevent any negative impact on the scanner clock system. Nevertheless, as the op-

erator of the scanner, you must obtain the scanner manufacturer's official approval for estab-

lishing a connection of this type as well as approval of the selected clock signal output before

using the SyncBox system. Certificates from scanner manufacturers are available on request.

Installing the recording soft-

ware

You require Version 1.10 or higher of the Recorder in order to operate the SyncBox system. If

this version is not installed on your computer, install the most recent version of the Recorder

before connecting the SyncBox to the computer.

It is neither necessary nor recommended that you connect the SyncBox Main Unit to the com-

puter while you are installing the Recorder.

Connecting the SyncBox to the

scanner and the amplifier

Proceed as follows to install the SyncBox system:

1 Connect the SyncBox Main Unit to the computer using the USB cable supplied.

Note that your computer must be equipped with a USB 2.0 port. The SyncBox will not func-

tion with a USB 1.0 or USB 1.1 port.

2 The computer detects the SyncBox using the Windows® plug-&-play function and informs

you that it has detected a new hardware component.

3 Allow the installation program to search for a suitable driver, which is located in the folder

C:\Windows\System32\Setup\Brain Products\BrainAmp\.

4 The driver is installed automatically.

Note that Windows® requires that the driver is re-installed for each USB port the first time

that the SyncBox is used on a different port.

Figure 1-1

shows a diagram of the connections between the SyncBox Main Unit, SyncBox Scan-

ner Interface, amplifier and scanner.

Synchronizing the systems using the SyncBox 19

Figure 1-1. Connections between the SyncBox Main Unit, SyncBox Scanner Interface, amplifier and scanner

20 Chapter 1 Installation instructions for the conduct of combined EEG-fMRI measurements

You will also find instructions

for connecting the SyncBox

on our web site at http://

www.brainproducts.com/

downloads.php ("How to Set-

Up the SyncBox").

The SyncBox is supplied with a short and a long 50 Ohm coaxial cable that you can use to con-

nect the SyncBox system to the scanner. Proceed as follows:

1 Connect one end of the short 50 Ohm coaxial cable to the clock signal output of the scan-

ner.

2 Connect the other end of the short 50 Ohm coaxial cable to the Input port of the SyncBox

Scanner Interface (see Figure 1-3

).

3 Connect one end of the long 50 Ohm coaxial cable to the Output port of the SyncBox Scan-

ner Interface (see Figure 1-4).

4 Connect the other end of the long 50 Ohm coaxial cable to the Input port of the SyncBox

Main Unit (see Figure 1-6

).

When the connection to the SyncBox Main Unit is established, the PWR LED on the Output

port of the SyncBox Scanner Interface lights up green. The SyncBox Scanner Interface is

now ready for operation.

5 The SyncBox Main Unit has a number of connectors on either side. Connect the BNC cable

from the SyncBox Scanner Interface to the 50 Ohm BNC connector labeled Input (see

Figure 1-6

).

Next to the BNC Input port, there is a 15-pin HD D-Sub output labeled AUX.

The Signal LED is also on this side of the SyncBox Main Unit. It lights up yellow when the

SyncBox Main Unit receives a signal from the SyncBox Scanner Interface.

6 On the other side of the SyncBox Main Unit there are two ports and the PWR LED (see

Figure 1-7

). The AUX port is the counterpart to the HD D-Sub output labeled AUX. Connect

this port to the AUX output of the USB2 Adapter using the supplied short cable with two 15-

pin HD D-Sub plugs. This connection is required for SyncBox operation since the SyncBox

Main Unit and SyncBox Scanner Interface are supplied with power via this cable. The clock

signal generated in the SyncBox Main Unit for the amplifier is also transferred to the USB2

Adapter via this cable.

7 Finally, connect the USB port of the SyncBox Main Unit (see Figure 1-7

) to the computer us-

ing the USB cable supplied.

Figure 1-2. SyncBox Scanner Interface with cables connected (top view)

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