Digital Lynx User Manual
Contents
1. Neuralynx High Density Electrophysiology TX ue Digital Lynx User Manual Neuralynx Inc 105 Commercial Drive Bozeman MT 59715 Phone 406 585 4542 Fax 866 585 1743 www Neuralynx com Revision 1 7 support Neuralynx com 9 20 2013 Table of Contents Dociment OVER CM ed dde E rer lord 4 2 HE HAL ENS OV erie a nn ini mine 7 Sy penal Lyn Components saga aca E RS RAR nn een 8 PRO a T e E A E E E E A ere 8 S22 Rear PAS Ste in 9 3 3 Inside the Rear Panel of the Digital Lynx interface box 16 3 3 1 Configuring the number of Input Boards in the system 17 A DC Coupled pit Board Details saias diesel a 21 Ae Mok SMUT OMMC COLES aus en nine uae eee 2 4 1 2 50 Pin 3M MDR Tether Extension Cable Connector 23 ato 37 PRUuDRS 7 Tether Connector ccc asic ti Ra dde 24 Adee 60 Pi SM C OMe Cl OF acct yas cease secant east D to es cect te 25 4 1 5 Why have three input connectors on the front panel 21 4 1 6 Reference selection jumpers and Resistor Pack usage information 28 Ads Input oad Resistor Pack Sennin Veen a ics 28 4 1 8 Reference Selection Jumper Header Pin area 29 Reference Bus Shorting Jumper Usage Details ee erre 30 4 2 Input Board Differential Input Amplifiers and 24 bit A D converters 32 A Input Board Front Paner LED S es dae ums ieee tenet wastaoe 32 42 2 AC Coupled Input Board D tails same sant Me dt 33 4 3 DC Coupling Channel Modification cc ccceces2. Rosin Core Solder should be used Do NOT use water soluble flux solder as this type of flux must be cleaned off of the PC board due to its caustic nature The process 1s fairly simple first locate the pair of capacitors for the channel that you want to convert to DC coupling and second solder a small wire across the top of each of the capacitors to disable the AC coupling The AC Coupling Capacitors are part names CExx and CFxx where xx is the channel number from O thru 31 2H Le r 6 alt vas Ed EELS TP aged D de FT E mi fu CL ER Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 33 The capacitors are shown in the red highlighted area Also note that the channels are numbered from right to left as 16 0 17 1 18 2 etc so that the right most two capacitors are for channel 16 Also note that the Channel Numbers are shown below the AC coupling circuit in the larger white lettering HAORA CANLA OMA ef NE mait RO A AA a e lg A Es a leia o pl gl el lg Le o lel Le Le TS X ms fH BEE 7 tt JL HE TE x ENSE Y fez SOS gp EEE NANN Figure 4 7 AC Coupling Caps Picture showing the AC Coupling Capacitors for the high numbered channels on the left side of the PC board The capacitors are shown in the red highlighted area Note that the channels numbering is continued from the above picture and that the left most channel is 15 and channel 31 1s to the right of that A
3. along with the input range and resolution of the A D converter such that the 18 bit of the A D converter represents 1 microvolt This gives an input signal range of the input versus the input reference the differential input range to be 132 millivolts The output of the A D converter is stored on the Input Board and then immediately read by the Xilinx device on the Motherboard located on the rear of the Backplane see above All channels on all boards are sampled simultaneously 4 2 1 Input Board Front Panel LEDs There are 10 Front Panel LEDs which show status of the Input Board Note that these LEDs have been set back from the front panel viewing holes to reduce the amount of light and possible distraction therefore the viewing angle is very limited The LEDs from top to bottom are HS 5v Power this indicates that the Headstage Power Supply has 5v voltage and is ready HS 5v Power this indicates that the Headstage Power Supply has 5v voltage and is ready 5V Analog this indicates that the Analog Circuitry power supply for the input instrumentation amplifiers and the 24 bit A D converters has 5v voltage and is ready SV Analog this indicates that the Analog Circuitry power supply for the input instrumentation amplifiers has 5v voltage and is ready HS OK This is a Blue LED and it indicates that power is present to the headstage tether 3MMDR and uDB37 connectors Note that the HS Power is turned on the
4. BRB RER Less best et g creeper EE EEEE EEEREN NN EN ENENES EN EN HT JB3x5 S1011 2N0 ho PEP FE PP PP FD P PRE re PE ee PE PE Pa ha PT PTT JB3X32 520 k 36ID lo jo S Ja O HU oi MM cn O Mm 0 Qi 69 O 10 A CO 9 Im CO 19 O on 00 AD 09 O 10 Qi Lo N MC 10 OO DR DR ee ee Re OO COCO NON CO NI CO QI CO QI CO QI CO QI DO GN OO I DO NI ON rm DI DID Litt LL Rersen EEE EE ES PE PA AN A ale Slek alt sles Sle Slot Sle SiS lslalsls sll slalsle ale sisi slelslelalsiais O lol elo cio So EVM Elo EO EE EL ela EL EL EE EEEE EE Ee EL Ee Ee Ee e O O ED ep EO te ie e E Reference om E joc joc e joe e foe e foe e e e e e e Joc e e e e e e e e e e e e fe ie E EE1 EE2 Gnd Ref Animal _ Gnd Jumper to the Top row for RefSell Jumper to the Bottom row for RefSel2 To use the differential inputs from Amp Connectors just leave the jumper out PGnd 4 6 Schematic of the 3 pin Reference Jumpers for Input Reference Selection Note that schematics use the concept of Net Names for signal connections that are physically connected together For example RefSell creates a bus which connects the selection of the 5 reference source signals to all of the Input Channels reference selection pin for RefSell bus In O thru In 31 The group of five 3 pin connectors allows the connection o
5. Dust Covers Also note that there are small black soft rubber dust covers that are inserted into each of the fiber optic connections sockets on the back of the computer and Digital Lynx These black dust covers must be removed before the fiber can be connected These dust covers must be saved and should be placed back into the fiber optic transceiver receptacle when the fiber cable is disconnected for an extended period See below for more information about proper care of fiber optic components Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 14 Dust Cover on PC Dust Cover on the Digital Lynx Removal of the dust cover After removal of the dust caps and socket dust plugs store these 6 items in the plastic bag which contained the fiber optic cable Figure 3 9 Storage of Fiber Optics Protection Equipment Connect the fiber optic cable between the computer and Digital Lynx Box Be cautious to not make a sharp bend in the cable as this will break the plastic optical fiber and will cause data transmission errors Note for the PC and Digital Lynx connections the plastic release latches will be facing downward Do not force the fiber optic connections You will hear the latches click into place when the connection is properly made Figure 3 10 Fiber Optics input to EDT Card and DL Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 15 Note The rear panel of the Digital Lynx box can be opened hinged on the botto
6. User Manual 9 20 2013 Page 8 3 the extraction latches are spread up and down from the front of the module cabinet to cause the board to be extracted from the backplane You do not need to retighten the extraction latch screws if the board is reinserted for example in the case of the Input Board but the screws MUST be screwed in and lightly tightened if the Digital Lynx box is shipped 3 2 Rear Panel There are 4 external connections that can be made on the rear panel and are 1 Ground 2 Main 15v 4Amp power connection 3 Obsolete Battery charging current connection and 4 the Fiber Optic Cable connection Fiber optic Cable Connection Battery Charging Current Connection Main 15v 4Amp Power Connection Ground Figure 3 2 Rear Connections of Digital Lynx The Ground connection accepts either a standard Banana Plug or by unscrewing the knurled cover a wire This ground connection should be used if a strong noise source is present and is reduced by grounding the cabinet Under normal situations this use of this ground connection is not needed Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 9 The Obsolete Battery Charging Current connector 1s the same standard 2 1 mm connector as the main power If an isolated configuration is used the batteries must be removed for charging as connecting the Charger battery charger to the box will cause the interface box to not be isolated We will not cover the Battery Charging pow
7. described below If the ERP patch panels are used in the system the functions of Reference Selection is provided by the ERP The 80 pin connector is used for ERP connection as this provides the Signal and Reference inputs for all 32 channels In this situation all of the shorting jumpers should be removed The 10Kohm Resistor Packs should also be removed because these same Resistor Packs are present on the ERP panels DRS boards Note that the shorting jumpers and resistor packs have been properly configured installed or removed to match the total configuration of your system at the time that your complete system was shipped from Neuralynx regardless you should check for proper configuration of these parts Please refer to the annotated Input Board picture above for the locations of parts 4 1 7 Input Load Resistor Packs There are three 16 pin sockets in back of the input connectors These are for 10Kohm resistor packs 15 resistors in a DIP package which provide a lower impedance load at the inputs to eliminate large noise signals if the input connectors are disconnected and to reduce high frequency noise These resistor packs are the same as used on the ERP 27 patch panels and serve the same function These Resistor Packs will be installed in these sockets if the ERP xx patch panel s are NOT used with the Input Board When these 3 Resistor Packs are installed a 10Kohm resistor 1s connected from each of the 32 input channels Si
8. first time that acquisition is started and it is left on until the interface 1s powered off LP OK this indicates that the 3 5v Digital Circuitry power supply is on and is supplying power to the Digital logic on the Input Board LED1 thru LED4 These are general leds connected to the Xilinx programmable logic integrated circuit These are used to show a heart beat of the logic that has been programmed into the Xilinx device These LEDs are currently connected to a counter in Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 32 the logic These should blink at a rate around once per second All Input Boards should flash these LEDs at the same rate and synchronously 4 2 2 AC Coupled Input Board Details The AC Coupled Input board is identical to the DC Coupled Input Board described above with the following exceptions e The micro DB 37 connector was removed e AC Coupling Capacitors for 16Hz High Pass Filtering were added 2 per channel e A Common Mode Rejection Ratio Adjustment Potentiometer was added e The Headstage 10K ohm Load Resistor Packs were changed to SIP packages 4 3 DC Coupling Channel Modification The AC Coupling Capacitors may be disabled easily on a per channel basis if required This is a fairly easy process but once performed a channel cannot be converted back to AC Coupling because of the change in value of the AC input capacitors during the soldering process Details for the modification Note
9. 8 6 G pupy D N Jamod SH 29U318 9 Y BS IA Ziru ZA Elu DE CA pl ul PA Si ul DEIN J19M0d SH sod 13M0d SH ve j24 PUS GA Q9bL u 9A Liu If L Blu 8A 6L Ul se 6A Oc Ul Jp OLA IZ ul P LIA cee CLA C ul plays Jaa L tr 62 mall Jp 97 6Z Ul 7 IZ Oc ui OV 8Z Le u J 3 G pugy QACLZ9 OSCOL WE PGnd Figure 4 2 MDR 50 Connector 4 1 3 37 Pin uDB37 Tether Connector The 37 pin connector has the same pinout and functionality as the standard Neuralynx HS 27 and HS 54 Headstage amplifiers Digital Lynx User Manual Revision 1 7 9 20 2013 Page 24 AGnd Le 6 DB 2 D op co Le Xe N ojo SITET to tool tl Ekol thol aj Z lote t E za 0 gt EE EEEE llr ESEE LS LS Ne na a ud o el D o o e lol lo jo X jo Eee E Bjo ler jul jo JE NN KIN OLN m DIN ej a ad ox Oley tim tim tim tio tio tote to ud Ojo tu teten Noy iF Ex Ex Cx Ex Cx Ex Ex EX OW y Vly PE Cx Ex EX Xalo E ali ok DC rl 0 O LDA HEAD OD o o iN o 69 ml CO e AH AHO OE D e N NO DANS N o NI 20 N t N e eN NA JIN3 CONNECTOR DB37 AIRBORN_MR261037435220R Figure 4 3 uDB37 Input connector 4 1 4 80 Pin 3M Connector The 80 pin 3M connector provides a connection to all existing ERP patch panels This connector has been pined out so that a single connector with two 40 pin ribbon cables has the same pinout as 4 Lynx 8
10. Amplifier input connectors A cable harness is provided to connect the proper number of Input Boards to the same number of ERP 27s patch panels Each of these cables pairs of 40 pin ribbon cables is terminated to four 20 pin ribbon cable connectors which may be plugged into the rear ERP 27 panel JampX connectors Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 25 Pin 40 Pin 1 JIN2 n w r Q m 8 A w n w n DS av D m zZ per Q D D Q D t O rd a 7 T amp A py So So z H CONN_80_AB RN_50E_080_P1_SR1_TG Pin 41 Figure 4 4 80 pin 3M Connector Cable Pinout The 80 pin cable connector is shown below Note that the red edge of each ribbon cable corresponds to Pin 1 and Pin 41 of the 80 pin connector as shown in the picture 5 40 Pin Dual Row Connector Figure 4 Digital Lynx User Manual Revision 1 7 9 20 2013 Page 26 4 1 5 Why have three input connectors on the front panel An obvious question that a user should ask at this point is Why are there so many input connectors on the Input Board The answer 1s that we wanted to make the system as flexible as possible to support various combinations of ERPs usage and also direct headstage tether connections for using the system without ERPs The ERPs have shown to be the best fastest solution for extra intra cranial noise reduction thru the use of the reference selection controls ERPs are relativel
11. Digital Lynx User Manual Page 22 4 1 1 Input Connectors The 3 Input Connectors on the front panel provide compatible connections to existing Neuralynx Headstages Tethers Tether Extension Cables and Neuralynx ERP xx patch panels These 3 input connectors are e The 3M 50 pin MDR Tether Extension Cable connector e The 37 pin uDB37 Tether cable connector and a new connector e The 80 Pin 3M Latching connector which provides differential inputs to all 32 channels This connector is arranged in 4 groups of 8 input channels and a ERP Input cable is used to connect the output of the Neuralynx ERP XX patch panels to the input board 4 1 2 50 Pin 3M MDR Tether Extension Cable Connector The 3M 50 pin MDR connector has the same pinout and functionality as the input connector on the Neuralynx ERP 27 ERP 54 and Warp 144 EEG Reference Patch Panels Note eight unused pins on this connector are now used for the eight extra input channels In 24 thru In 31 on the Input Board This is because the ERPs only supported 24 channels plus the reference channels Ref EE amp EE2 but the Digital Lynx Input Board supports 32 input channels per board Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 23 s0d JeMod SH Q u LX ul CX C ul X U YX EE US IS y IS cas p ul GX G U 9X g ul LX L U 8X 8 ul 6X 6 u OLX Ol ul LEX Ei u CX JUS CS Py CS veru IZ GC U CZ 9c u CZ Le u PZ nin LO F Z p G 9 L
12. JAmp4 to the Digital Lynx Input Board s 80 pin connectors This cable should first be held in place and connected to the Input Boards Then each of the Dual 40 pin ribbon cables from each Input Board will connect to the JAmpl thru JAmp4 as labeled on the individual 20 pin connectors Note it is easiest to start with the bottom ERP 27 connections Next install the ERP 27 Power Cable braided Black Red and Green cable from the Power Supply to the white gold 5 pin power connectors on the back of each ERP 27 First connect the three spade lugs of the braided power cable to the three barrier strip screws on the rear of the Power Supply Make special note that the three screws are labeled R G B which stands for Red Green and Black respectively and indicates the three colored wire connections for the braided power supply cable Next connect the white 5 pin cable connectors to the back of each ERP 27 It is best to start from the bottom There may be extra unused power connectors on the cable but the overall length and placement of the used connectors should be sufficient for the number of ERP 27 panels in the system 6 1 1 Installation with the DRS 36 Digital Reference Selector 36 Mount the Digital Lynx Cabinet at a convenient location in your 19 standard rack The Digital Lynx Cabinet may also be left on a desk table top or installed in a medical equipment type cart if desired Make sure that the dual 40 pin ribbon cables used t
13. SOC onneCio E ars RS te 24 Feur SU DE ST npuiconnecior asas Men Sn M ects 25 Figure 4 4 80 pin 3M Connector Cable Pinout ss 26 Fisur 4540 Pin Dual Row Connecior nn nn dei 26 4 6 Schematic of the 3 pin Reference Jumpers for Input Reference Selection 31 Pret PAC COUDRE CDS ee ee di 34 Figure 5 1 Control Board Input Connector ss 36 Figure 6 1 Digital Lynx in a 19 equipment rack 37 Four O2 DRS SR tt Ce een 38 Pigure 6 35 Input Vest Cale sd an nds niet 42 Table Red MotherBoard DIP SeleCHONM aisee 19 Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 3 1 Document Overview This document is a user s manual for the Digital Lynx data acquisition interface box This manual is organized as e an overview of the Digital Lynx e specific information you need to know before installation such as fiber optic cables step by step installation instructions of the system detailed information about hardware settings and reconfiguration detailed information about connectors detailed information about the Input Boards reference selection detailed information about specifications analog signals sampling etc The following Symbols appear on the system components and documentation a eee o 24 Earth ground Connection point for the neutral conductor on PERMANENTLY INSTALLED EQUIPMENT Protection rating against ingress of water Attention consult ACCOMPANYING DOCUMENTS Ont power disc
14. al Plus Signal Minus p Signal Plus Signal Minus HEBER Signal Plus Signal Minus p Signal Minus q AGnd N Co amp MOD OO O on cable can up up to 12 inches in itle Digital Lynx Input Board Test Cable Size Document Number A Doc Date Monday August 22 200 Figure 6 3 Input Test Cable Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 42
15. cccceccceeeeeeseecceeeeeeaaeesseeeeees 33 gt Conmol Board Details nn nee een 35 Installatono the Drettal Lynx SysteMisneeisi enes rasa Rana R 37 6 1 Installation of the Digital Lynx with ERP 27 patch panels 37 6 1 1 Installation with the DRS 36 Digital Reference Selector 36 38 6 1 2 Digital Lynx Interface Box 15 Volt power supply 38 Odo Power the Dreital Enr Cabinets ae a ns 39 6 1 4 Connect Fiber Optic Cable between the PC and the Interface Box 39 6 1 5 Test signal inputs with the Input Test Cable 4 List of Figures and Tables Fisure 321 Bront Panelor Dietai Eyn eers aren Ria ad dr a 8 Fisure 3 2 Rear Connections of Digital Lynne gli anais a ELIAS das asda ed 9 EFirsureS Piper Oplcs C Onne HO assa uai ne nait 10 Figure 3 4 Fiber Optics Cable and Power Supply Rs 11 Fis r 5 6 Power Supply Connec HoN semaines 12 Pigure 3 7 Fiber Optics Connector issus nn es nie Mn nn in taste te 13 Fisur 3 5 Fiber Optics Release Late anni E 14 Figure 5 9 Fiber Optics Dust COV Crs nee Rene 14 Figure 3 10 Storage of Fiber Optics Protection Equipment ccccccccessseeeeeeeeeeeeeees 15 Figure 3 11 Fiber Optics input to EDT Card and DL 15 Ersure 5 2 inside the Back On he DL es EG na 16 Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 2 Pico 5 15 Blue Jumper Dias tans sea ARS Rd Alu dat e 19 Fig re 4 1 DC Coupled Input Board Rs sen aS 21 Peiret MDR
16. ds installed in the system e The Xilinx System ACE module and Compact Flash Memory card which is plugged into the Xilinx Insight Development board note that this card reads data in the Compact Flash card and programs all of the Xilinx programmable logic devices in the Digital Lynx Itis plugged into the Motherboard and is perpendicular to the Motherboard e The Infinion Fiber Optic Transceiver PC board has four high speed SMA coax cables that connect to the Motherboard This board also has 2 small LEDs a GREEN LED to show power and a RED LED which when lit indicates that the fiber optic cable does not have an optical signal from the PC at will normally be off e The back plane PC board with power supply modules and fuse and front side bus connectors to all of the plug in modules e The gray ribbon Data Cables connect the Motherboard to the back plane data bus The cables connectors are not securely locked into place and may come loose in shipping If these are loose the system will not transfer data from the A D inputs to the motherboard There are 2 cables each cable consists of two 40 conductor ribbon cables e The Bulk Power Supplies convert the 15v from the main power supply or the batteries into 3 5v 5 5v and 5 5v which 1s distributed to the Control Board and the Input Boards For a full 10 Input Board system the power supply heat sinks may be very warm to the touch e Xilinx WH PCIV Programming Cable Module is a temporary me
17. e Digital Lynx Cabinet Turn on the Control Board Power Switch After a few seconds the interface box should be successfully programmed Successful Programming Indication The 5 LEDs on the bottom of each Input Board will do a unique LED pattern when each board is programmed The sequencing of the lights of all Input Boards should occur synchronously The 3 LEDs that sequence are LEDI LED3 amp LED4 LP OK and LED2 should be on continuously 6 1 4 Connect Fiber Optic Cable between the PC and the Interface Box The system shipment contains one or two ORANGE colored fiber optic cable This connected between the EDT PCDA board in the PC and the rear panel of the Digital Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 39 Lynx Interface Box The ends of this cable are the same Connect one end to the Digital Lynx and the other end to the PC EDT PCDA board See the instructions in the previous text for information on connecting this fiber optic cable Note The fiber optic cable is fragile and must not be bent in a sharp radius the minimum radius for these cables is about 8 cm Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 40 6 1 5 Test signal inputs with the Input Test Cable An Input Board Test Cable is shipped with new systems as of September 2005 This cable allows testing of inputs for signal and Common Mode Rejection CMR operation This is a very simple cable All 32 Positive input channel signal connections are c
18. e buss back to the Motherboard This single stranded blue wire will be placed on the 20 pin connector pins for the TDO signal as shown below in the following two diagrams Number of Boards Blue Wire Pin l 2 3 4 5 6 7 8 9 l Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 18 0000000000 0000000000 Figure 3 12 Blue Jumper Diagrams The second operation that is dependent on the number of boards in the system is when the system is running and data is being transferred from the Input Boards to the Motherboard over the backplane The Motherboard Xilinx logic needs to know the number of boards in the system which also determines the size of the data packet transferred to the PC The number of boards is set on the RED Dip Switch on the Motherboard as in the following table Table 1 Red MotherBoard DIP Selection Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 19 Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 20 4 DC Coupled Input Board Details Backplane Connector LC LOS CCR RS a LS LE LE LEE EI ta its ds gt gt _ 7 7 gt gt gt 7 7 _ LE gt 7 SRR RR REG RRR GR LLG ass me O 3M 50 pin udb37 pin 80 pin differential 4 Input Conn Input Conn Input ERP Conn Figure 4 1 DC Coupled Input Board The input boards have three major sections e The Input connectors input load Resistor Pack Sockets and Reference Selec
19. er connection at this point because as of 9 21 2004 charging of the batteries IN THE CHASSIS is not recommended Use of the Batteries is not recommended and should be returned to Neuralynx for credit return Figure 3 3 Fiber Optics Connection The fiber optic connection is in the upper left corner of the interface box This is a standard SC type connector The link is bi directional meaning that there are two fibers in the cable for transmitting data and commands between the Digital Lynx and the computer The Fiber Optic Cable is a standard SC type fiber optic cable Itis used for the main data communications between the Digital Lynx interface and the Computer The Power Supply is a standard 15v 4 amp DC power supply as shown below Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 10 Figure 3 4 Fiber Optics Cable and Power Supply The power supply has a Universal Input AC Power input which means that the input voltage range is 100 to 240 VAC and should be usable throughout the world The AC input 1s a standard 3 pin DIN connector and users should not find a problem using standard power cords from their specific country The Main 15v power connection 1s a standard 2 1 mm or 2 5mm power plug receptacle The external power supply module supplied with the Digital Lynx is rated for 4 amps but Digital Lynx does not consume the full 60 watts Note Be careful not to insert the main power supply module into the Battery C
20. f the five reference signals to the two Reference bus lines To connect a reference signal to Refl place a jumper on the middle and bottom pins for the reference signal To connect a reference signal to Ref2 place a jumper on the middle and top pins for the reference signal Note that only 1 reference source signal from the headstage should be connected to the Refl bus line and only one reference source signal should be connected to the Ref2 bus line For the thirty two 3 pin jumper area each of the 32 input channels for the board has one 3 pin connector As in the reference source selection area connections for an input channel to the Refl or Ref2 bus lines is made by inserting the shorting jumper to either the bottom or top and middle pins Any or all 32 channel reference jumpers can be connected to either the Refl or Ref2 bus lines Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 3 1 4 2 Inout Board Differential Input Amplifiers and 24 bit A D converters Each input channel consists of a Differential Input Differential Output amplifier with a gain of about 15 The differential output of this amplifier is connected to the input of a 24 bit A D converter There is also a 9KHz single pole anti aliasing filter between the amplifier and the A D converter The A D converter is typically run at 32 Khz 32 556 Hz is the exact sampling frequency The input amp gain of 15 makes the signal amplitude
21. gnal positive inputs to ground There are also 3 jumper pin pairs that allow connection of the Ref EET and EE2 signals to be connected to one of the 10Kohm resistors There are no 10Kohm resistor connections to the Reference Inputs for each channel in the Resistor Packs Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 28 4 1 8 Reference Selection Jumper Header Pin area AC Input Board Reference Jumpers rea yw J d el x 2 E EC Le Seg 29 g 24 7 az A SA o A A ae e Pk MAP Re f gt 266 JEE2Z A295 JBRS1 EL RE b24 JINZ O R1 R2 Reference Selection for Channel Minus Input Differential Reference Input for each Channel Jumper in Center gt Upper Position Selects R1 Jumper in Center gt Lower Position Selects R2 Channels numbered 31 gt 0 from Left to Right JPST1 q Ref Fe Reference RI amp R2 Source Select Ee2 Jumper in Center gt Upper Position Selects Connection to R1 nus Jumper in Center gt Lower Position Selects Connection to R2 EE1 gt RPack Load EE 1 gt In 24 Special Reference Resistor Pack Load and le Load 94 In25 amp In26 Connection Jumper Area Ref gt In 26 Normal Left to Right Jumper Installation is In Out Out In Out In Ref RPack Load Note Ref gt 1n26 EE2 gt In25 or EE 1 gt In24 should NOT be inserted if you are using a 32 channel headstage DC Input Board Reference Jumpers DC coupled Input Boards have the same functionallity jus
22. gnals Commonly Used The HS 27 has three signals Ref EE and EE2 which are normally used as reference inputs but may be used for any purpose as these signals are buffered the same as the normal 24 electrodes The AGnd Animal Ground is usually connected directly to the Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 30 Headstage ground plane and can be used as a reference The PGnd Panel Ground 1s connected to the ground plane of the Input Board and may be used as a reference The following schematic shows the connections to the 3 pin posts and the reference Refl and Ref2 buses RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 RefSel2 Oo JBCR1 o o o O D dO ww Ww 19 19 o BREE PREER ERR E23 EN O eG N Tl avisa D EE Ff D HO E E ON OO OOOO OOD EM E OO OC OO OOOO OO oO C EX O Co O G G Le LE Mn A SEMA MARA Mi dad Pa A Sa Sa A Si ee Y E Y y Y G G QG O U OG QOU QQG OUG RUGU QG QUO QG QUO Ge OQU UU QQ sole e e D O O amp amp aoe MS QU VO VO VO Ae et ent st ere pe ee ee est st RA es rt A en es E BS E e dln AOA OP CADA Oa OA Ol Oa Oh Ey Ey BY Ey EY EYA OU OA ON OA D D DA OL DA DA OA OA Ey Ey EY KDE
23. harging connector It will not damage any components but the system will not power up Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 11 Figure 3 5 Power Supply Connection The Fiber Optic connection is a standard SC type fiber optic connection A standard fiber optic cable is supplied in 3meter and or 10 meter lengths to make the connection from the Digital Lynx to the host PC Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 12 Figure 3 6 Fiber Optics Connector The SC connectors have a positive latch which makes a click sound when engaged There is a small clear ramp release tab that is squeezed to release the positive latch Be gentle with the fiber optic cable as the exposed ends of the cable are polished for proper light transfer and must not be touched scratched or hit Also the fiber cable should not be bent in a sharp bend a 4 inch diameter 10 cm radius should be maintained when routing the cable from the Digital Lynx box to the PC To release the fiber optic cable the clear plastic Release Ramp 1s gently depressed as shown below Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 13 Figure 3 7 Fiber Optics Release Latch Before inserting the Fiber Optic cable the Dust Caps one for each individual fiber must be removed as shown below These dust caps MUST be saved to protect the fiber ends when the cable is disconnected from the system Figure 3 8 Fiber Optics
24. he inputs subtract the reference from the signal CMR test connections e Red banana jack to the Signal of the generator e Black banana jack to the Signal of the generator and e Green to the Ground of the generator Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 41 Set the Generator to 5volt or the maximum output signal of the generator if it is a Minirator 20 Hz Sine wave You should see a very small signal when the gain is turned up to 50 000 This test is only valid for CSC displays as spike channels will need to see a spike which will not occur for a 20 Hz sine wave input The schematic for the input test cable is shown below Note that this shows only one of the 40 pin cables from the Input Board connector the other 40 pin cable is connected the same way This is an input test cable for testing all 32 input plus and minus inputs Note This shows only one of the 40 pin Cables the other 40 pins should be wired the same and connected at the junction of the Test Lead Wires J AGnd tins Signal Plus Signal Minus Signal Plus Signal Minus Signal Plus Signal Minus TEENS Signal Plus Signal Minus bp Signal Minus Signal Plus Signal Minus Red Test Wire Lead Signal Plus Signal Minus Signal Plus Put Red Green and Black Banana Plugs on the ends of 6 inches of Red Green and Blacktest Signal Plus lead wire Signal Minus TEENS Signal Plus Signal Minus EE Signal Plus Signal Minus TEENS Sign
25. he installation of your Digital Lynx system will depend on the type of Reference Patch Panel you are using either the ERP 27 external patch panel or the DRS 36 Digital Lynx Rack Slot panel If you purchased the DRS 36 boards they will be appropriately installed in the Digital Lynx System 6 1 Installation of the Digital Lynx with ERP 27 patch panels Figure 6 1 Digital Lynx in a 19 equipment rack The cabling shipped with your Digital Lynx System has been specifically made for your system order Your EEG Reference Patch Panels ERP 27s or Warp 144 panels power supply and Digital Lynx Interface Box need to be arranged in the following manner The ERP patch panels must be located above the Digital Lynx interface box and are Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 37 usually located at the very top of the rack consecutively with no space between panels You should have one ERP 27 for each input board Leave 1 to 1 between the bottom of the last ERP 27 and the Digital Lynx Interface Box this space will be used to route cables between the ERP 27s and the Digital Lynx Input Boards The Lynx 8 Power Supply 15v power supply should be located below the Digital Lynx Interface Box This power supply will power only the ERP 27s the Digital Lynx has a separate power supply or will run off of batteries The large black ribbon cable harness is used to connect the ERP 27 s back panel amplifier connectors JAmp1 thru
26. lso note that the Channel Numbers 15 31 14 30 13 29 etc are shown below the AC coupling circuit in the larger white lettering Make sure that you are jumping the shorting wire across the larger capacitor 3mm by Imm taller device and NOT the much smaller surface mount resistors RHxx and RGxx which are located between the AC coupling capacitors and the channel number lettering Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 34 5 Control Board Details The Control Board contains the main power switch and power supply LED indicators the main Time Stamp Clock external input and a buffered square wave External Output coax jacks these are SMA type connectors and the 16 bit Digital TTL Parallel Input port connector 34 pin ribbon cable IDC connector The 1 microsecond TimeStamp clock signal is always present on the TS Clock Output SMA Connector when the interface box is configured This clock signal will have a voltage from Ov clock low to 2 5v clock high The External TimeStamp Clock Input SMA connector is used when synchronizing multiple Digital Lynx systems or other acquisition systems requiring a clock The 16 bit parallel Digital Input port is an input only port This is present on the 34 pin connector and has the standard pin out compatible with the other Neuralynx data acquisition system In this standard all of the even pins are ground the odd pins 1 gt 31 are input bits 0 gt 15 respectively and pin 33 is also gro
27. m therefore make sure that the fiber cable s clear plastic latch does not catch on the edge of the panel hole for the fiber connector This will allow the rear panel to be opened and closed while the fiber is connected 3 3 Inside the Rear Panel of the Digital Lynx interface box Board i Cable System ACE Xilinx Data Buss Transciever Bulk Power Supply Config DIP Modules iin Else Switch 4 amp SB Insight Xilinx Development Board also called the Mother Board Figure 3 11 Inside the Back of the DL The rear panel is hinged for user access The only user removable components are the Xilinx Compact Flash Card plugged into the Xilinx System ACE board and the Infinion Fiber Optic Cable driver module which normally will not give any problems The rear panel is opened by unscrewing the top 3 screws If the fiber optic cable is still attached the panel may be opened but pay extra care not to damage the cable Disconnect the 15 volt power supply cable to avoid damage to the power cable The main components on the inside of the rear section of the interface box consist of Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 16 e The Xilinx Insight Development Board called the Motherboard which controls all data transfer of A D data from the input boards and fiber optic data packet communications to the host PC This board has a red 8 position Configuration DIP switch which tells the Motherboard the number of Input Boar
28. nclude High speed 1 25 Gigabit per second fiber optic data link to the host Cheetah PC Up to 320 Analog inputs per system Each Analog input is sampled with an individual 24 bit A D converter Analog input bandwidth is DC to 8 KHz Analog inputs are sampled at 32 556 Hz per channel Analog inputs are simultaneously sampled Analog input range is 132 millivolts 1 microvolt per bit at bit 18 Analog inputs are fully differential inputs Extremely low input noise levels of 4uv peak 1 3 uv RMS makes for better recordings Compatible with all Neuralynx EEG Reference Panels Direct headstage tether and Tether Extension cable inputs Headstage power supplies for tether input connectors if not using an ERP 16 bit TTL amp LVTTL compatible Parallel Input Port for monitoring external signals and e Totally electrically isolated system from AC Power and Ground through the use of the fiber optic data link e External Timestamp Clock input and output connectors for multiple system synchronization The Digital Lynx system can be totally isolated from Ground and AC power thru the use of the Fiber Optic Cable data transmission to the host PC running the Cheetah data acquisition software This allows the user to control grounding if a particular power ground noise situation exists The electrical isolation makes it safer for the subject as this allows the subject to be ungrounded making for a safe condition even if the patient s bod
29. o connect the DRS 36 to the Input Board are connected between the lower 80 pin connectors of the pair of boards Without these cables you will not receive any signal Figure 6 2 DRS 6 1 2 Digital Lynx Interface Box 15 Volt power supply Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 38 A separate power supply module 3 pin power DIN connector to a 2 1 mm power connector center positive has been shipped for running the Digital Lynx Interface Box This power supply is used unless the system must be unconnected both AC and DC coupling from Earth Ground and AC wall power This would be the case if your IRB board allowed the use of the system for human patients or other noise in the environment dictated powering the system from batteries Regardless the power supply can be used during this initial setup and installation This power module CUI is a universal input good for 100 VAC to 240 VAC and should work throughout the world This module will automatically detect the power voltage and will adjust for proper operation There is no user settable selector switch Plug the 2 1mm power plug into the far outside POWER jack on the Digital Lynx Interface Box rear panel Plug the AC power side of the power module to AC power The supply requires 4 seconds before turning on The very top light on the top of the Control board should now be light indicating that input power is present and the system may be turned on 6 1 3 Power th
30. onnected together to the Red banana plug all 32 input channel reference inputs are connected together to the Black banana plug and the input grounds are connected to the Green banana plug The three banana plugs are e Red Signals 32 e Black Reference Signals 32 e Green Ground 16 This is used with a signal generator that is capable of outputting signals as low as 132 mv peak peak as this is the maximum signal input range of the Input Boards There is not a 1000 1 signal reduction resistor network on the input of this cable as in other test signal sources from Neuralynx therefore you do not need to set the generator output to lv to get a 1 millivolt input to the board as is commonly done with the SM 27 Signal Mouse You will need the supplied adapter to get Banana Jack connections from the signal generator For the basic signal test connect e Red banana jack to the Signal of the generator e Black to the Ground of the generator and e Green to the Ground of the generator Set the Signal Generator output to millivolt square wave at 20 Hz This will put 1 millivolt spikes on the spike channels and a 1 millivolt square wave signal on the CSC channels depending on frequency filtering settings Adjust the SC CSC gains so you can see an unclipped waveform on the displays The Common Mode Rejection Test put the same signal on both the Signal and Reference input of each channel of the Input Board The test is to see how well t
31. onnection from the mains On power connection to the mains CYPE BE EQUIPMENT Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 4 240 Volt Input Voltage Range Input Current Frequency Temperature Range Relative Humidity Range Atmospheric Pressure Range 110 Volt Input Voltage Range Input Current Frequency Temperature Range Relative Humidity Range Atmospheric 200 gt 240 VAC 3 2 Amp Max 50 Hz 40 Degrees C gt 70 Degrees C 10 to 100 500 to 1060 hPa 100 gt 125 VAC 5 2 Amp Max 60Hz 40 Degrees C gt 70 Degrees C 10 to 100 500 to 1060 hPa Pressure Range Equipment not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide The power cord is to be used for mains disconnection Type of protection against electric shock Class 1 Equipment Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 5 Degree of Protection against electric shock Type BF Applied Parts Degree of Protection of the ingress of water IPXO Cleaning and disinfection methods outside surfaces may be cleaned with a damp cloth and ammonia based cleaner No user replaceable parts on the isolation cart Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 6 2 Digital Lynx Overview Digital Lynx is a high performance data acquisition subsystem designed for neurobiology electrophysiology recording The main features of the Digital Lynx system i
32. resistor pack signal line loading of the Headstage reference signal lines These 025 square posts spaced at 2 54 mm are also referred to as shorting posts and are commonly used on PC Boards and other electronics as configuration jumpers The idea is that a small shorting jumper plastic body with a small conductive metal strip inside 1s placed over two adjacent gold pins making a connection similar to a switch There are two configuration of 025 post one with two posts to make a Single Pole Single Throw common switch and the other is with 3 posts where the center post is the signal and the two adjacent posts are the selections the center post can be connected to either of the outside adjacent posts to make a Single Pole Double Throw switch There are a total of e six 2 pin posts for reference signal connections e five 3 pin posts used to select Reference Signals Ref EE1 EE2 AGnd and PGnd to the two Reference Buses Refl and Ref2 e and 32 individual channel Refl Ref2 reference bus connections Three of the six 2 pin jumper positions which are used to connect resistor pack load resistors 10 Kohms on the reference lines 3 total The other three 2 pin jumper posts are used to connect the three references Ref EE amp EE2 to A D input channels 24 25 and 26 This last function was to allow HS 27 users to directly record the reference signals by connecting them to unused A D channels The Five Reference Si
33. t different locations for the Jumpers JPR Individual R1 R2 Reference Selection Em per Each Channel same as above Pond Agnd Ee2 Eel Ref R1 R2 Reference Source Selection Jumpers same functions as above Only two of these may be used one in the upper position and one in the lower position Ee2 Eel Ref input Resistor Pack Load Connections same functions as above Jumpers normally inserted Ref gt In 26 EE2 gt In 25 and EET gt In 24 Jumpers same functions as above jumpers normally removed Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 29 Reference Bus Shorting Jumper Usage Details The Digital Lynx Input Boards contain a subset of the Neuralynx ERP 27 EEG Patch Panel functionality There are a total of two Reference Buses to select individual A D input references from for each channel which may be driven by two of the five HS 27 standard references Ref EE EE2 AGnd and PGnd See the Neuralynx ERP 27 Manual for reference selection strategy and operation of the ERP 27 panel Like the ERP 27 the Input Board also contains 10 Kohm resistor packs for headstage signal line loading to reduce high frequency noise and keep noise signals to a minimum when the headstage is either powered off or disconnected These resistor packs have sockets on the input boards On each input board both AC and DC coupled inputs there are many 025 square Jumper posts used for 1 input channel reference selection and 2
34. thod for programming the first couple of systems installed before Sept 22 2004 After this date this cable is not needed as the system will be booted programmed by data in a Compact Flash Memory Card that is inserted into the Xilinx System ACE board If this cable is present in your system please remove it and return it to Neuralynx as this cable will not be used in the future The bug in the Xilinx software is now solved A compact flash card is now programmed and inserted into the System Ace PC board The system will automatically boot and program all the Xilinx devices when power is turned on Contact Neuralynx for a new Compact Flash memory card if you are still using the Xilinx HW PC 4 cable 3 3 1 Configuring the number of Input Boards in the system There are two operation modes that are dependent on the number of Boards in the system Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 17 The first is during the boot up programming state that occurs right after the system is powered up This operation uses a JTAG Serial Bus which is daisy chained from the first Input Board thru the last board in the backplane and then to the Motherboard the Xilinx Development Board mentioned above The programming must have the proper software loaded on the Flash RAM card and the blue jumper wire must be set to the proper connection for the number of boards in the system as this connects the JTAG serial bus string from the last board in th
35. tion Jumper Pins e The 32 Differential Input Amplifiers and 24 bit A D converters and e The Xilinx FPGA digital programmable logic chip 3 digital level converter I C s and backplane bus interface connector Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 21 Input Board Front Panel WT LIN XU JOJN N AARETE syndu 01 u 4 0Q ZZ dHa O at o ie lt gt x N N O O s 0 C CO O Q a Revision 1 7 9 20 2013 5v Headstage Power Okay 5v Headstage Power Okay 5v Analog Power Okay for Input Amps and A D Chips 5v Analog Power Okay for Input Amps and A D Chips 50 Pin 3M MDR Connector for the Neuralynx Tether Extension Cables Blue LED Headstage Power 5v ON to Headstage Connectors 37 Pin uDB37 Tether Connector Standard for Neuralynx HS 27 80 Pin 3M Connector This connector is arranged to be compatible with a single ERP xx patch panel connector This connector support the full 32 channel differential input connections It is arranged as 4 sections of 20 pins each section has 16 signals for 8 differential input channels and 4 ground pins LPOK Green LED showing the presence of Digital Logic Power LEDI Green LED used to show status from the Digital Logic LED2 Green LED used to show status from the Digital Logic LED3 Green LED used to show status from the Digital Logic LED4 Green LED used to show status from the Digital Logic
36. und The orientation of the pin numbering is shown in the following figure The Logic Levels on the Digital Input port connector are defined as LVTTL LVCMOS which range between 0 low and 2 5v high A voltage level up to 5 0v may be input to this port without damage Make sure the input voltages do not go below ground Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 35 Control Board Front Panel Parallel Digital Inout Connector input Power J Power ON F ON Pin 34 Pin 33 Gnd OF oe F Pin 31 Bit 15 5 5v OK F Pin 29 Bit 14 3 5v OK Pd PLN OK Fi Pin 27 Bit 13 ar j Pin 25 Bit 12 7s Clock IN i lt Pin 23 Bit 11 5 Pin 21 Bit 10 a U TS Clock OUT 5 Pin 19 Bt 9 Alignment q mA Neteh Neurolynx Inc Q Pin 17 Bit 8 Digital Lynx D O Pin 15 Bit 7 O Pin 13 Bit 6 mb OQ Pin 11 Bit5 Parallel Input Pin 9 Bit 4 Port Pin 7 Bit 3 Pin 5 Bit 2 Control Board Pin 3 Bit Pin 21 Pin 1 Bit O Figure 5 1 Control Board Input Connector Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 36 6 Installation of the Digital Lynx System The installation of the Digital Lynx System consists of 1 Mount the Digital Lynx Cabinet and ERP patch panels if applicable Connect the Power Supply and Power Up Test Connect the Fiber Optic Cable to the Computer Test signal inputs with the Input Test Cable Connect Headstages and or Patch Panels Test with Signal Mouse input signals oe EE T
37. y is connected to 120 240 VAC power The only current flow would be due to capacitive coupling from the case to ground Please note Early versions of this product allowed the use of LiPO batteries These batteries are not recommended for use and should be returned to the Neuralynx factory as these are not safety approved Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 7 3 Digital Lynx Components 3 1 Front Panel T Coct OW Neurotyrx Ing Digital Lyra S Beg 5 E a Owe Input Boards 5 DRS Boards 5 Control Board Figure 3 1 Front Panel of Digital Lynx The front panel is made up of several removable modules or blank covers for optional un configured components From Left to Right the modules are e 5 Input Boards and 5 DRS 36 board each support 32 Analog input channels The Control Board with the main Power Switch Power Supply Voltage LED indicators external Imicrosecond Time Stamp input and output SMA connectors and 16 bit TTL input port If a module needs to be removed from the interface box the following procedure is used 1 unscrew the two screws one on the top side of the upper extraction handle and one on the bottom side of the lower extraction latch These screws are captive to the extraction latch 1 e the screw will not fall out 2 press the white release button on both the top and bottom extraction latches and Revision 1 7 Digital Lynx
38. y large to the size of the Digital Lynx box when you consider a full configuration of 10 Input Boards and 10 ERP 27s Therefore we decided to support direct tether headstage connections The Input Boards supports a limited but the same type of reference selection facilities as the ERPs Input Board reference selection is made with small shorting pin jumpers which are only accessible when the Input Board is removed from the system This is a size versus convenience trade off For most laboratory environments users will choose to use the ERP panels The next section describes the Input Board setup for using the direct tether headstage connections Revision 1 7 Digital Lynx User Manual 9 20 2013 Page 27 4 1 6 Reference selection jumpers and Resistor Pack usage information If you are using either the 50 pin 3M MDR or the 37 pin uDB37 connectors you will have to use the Reference Selection Jumper Pins and three 10Kohm Resistor Packs on the DC input board and 4 on the AC coupled input board All of the 10Kohm Resistor packs should be aligned so that the writing on them is facing the faceplate of the input board These two input connectors only provide Signal connections positive inputs to each input channel and do not assign connect any signals to each channel s Reference Signal minus input The connections to the Reference minus inputs is done with the Shorting Jumpers The use of the Reference Selection Jumper Pins will be
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