HS-xx-mux - Neuralynx
Contents
1. 3 Enable the Impedance Measurement Function Using the commands and syntax discussed in Section 6 Multiplexing Headstage Command Descriptions the following configuration file can be created Channel 25 Impedance Config 1 cfg Notepad File Edit Format View Help Example Configuration File Set the Impedance Measurement Channel on Headstage 1 to Channel 25 SendLynxsxcommand AcqSysteml DHSSetiImpedanceMeasurechannel 1 25 Set the Impedance Measurement Current on Headstage 1 to 3 85nA SendLynxsxcommand AcqSysteml DHSSetiImpedanceMeasurecurrent 1 6 Enable the Impedance Measurement Function on Headstage 1 SendLynxsxcommand AcqSysteml DHSSetImpedanceMeasureEnabled 1 1 Figure 4 10 Example Configuration File Once the configuration file has been created and saved it can be run in Cheetah by selecting File gt Open Configuration File Browse to the configuration file selected Open The configuration file will immediately execute Observe CSC 25 in Cheetah it should show a 1000Hz sine wave roughly 750mV pp Refer to the figure below Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 13 Figure 4 11 AC Current Waveform on Channel 25 The channels electrode impedance at IkHz can be approximately calculated using the following equation Z Impedance of Electrode in Q V Voltage Amplitude Measured in Cheetah Convert to Volts I Current Amplitude output of the AC Current Waveform Generator2. Convert to Amps Figure 4 12 Channel Electrode Impedance Calculation Once the impedance testing 1s complete the Impedance Measurement Function should be disabled Once again this can be done with a Cheetah Configuration File Command Sequence 1 Disable the Impedance Measurement Function Using the commands and syntax discussed in Section 6 Multiplexing Headstage Command Descriptions the following configuration file can be created Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 14 E Channel 25 Impedance Config 2 cfg Notepad File Edit Format View Help Example Configuration File Disable the Impedance Measurement Function on Headstage 1 SendLynxsXcommand AcqSysteml DHSSetImpedanceMeasureEnabled 1 0 Figure 4 13 Example Configuration File Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 15 5 Hardware Overview 5 1 Multiplexing Headstage Amplifier and A D Converter Each AD Channel is digitized on the multiplexing headstage using a fixed reference The channels are AC Coupled and the gain 1s fixed at 192 V V One 16 Bit A D Converter digitizes 32 AD Channels This concept is illustrated in the figure below Electrode Connection Filter Figure 5 1 Multiplexing Headstage Hardware Illustration 5 2 Multiplexing Headstage Communication The multiplexing headstage communicates with the Digital Lynx SX via a dedicated SPI Bus Digital signals transfer data between the multiplexing headst
3. Impedance Calculation wwwmmww 14 Fioure 4 13 Example Commis uration Pile eiu rt EHE T E SEE EYE ERRE S EIER E tH d 15 Figure 5 1 Multiplexing Headstage Hardware IIlustration 16 Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 2 Figure 5 2 HS 32 mux headstage Input Pinout seen 17 Figure 5 5 HS 64 mux Input Pinoul L iain c Rees IR tbe A Dette e 18 Figure 5 4 HS 64 mux Input Pinout 2 eee reee tenerent na aaa rin rna 18 Figure 5 5 H5 36 Impedance Plug Tost Value entree o ede eno 19 Figure 6 1 DHSTriggerFastSettle Command Syntax seen 20 Figure 6 2 DHSSetImpedanceMeasureEnabled Command Syntax 21 Figure 6 3 DHSSetImpedanceMeasureCurrent Command Syntax 22 Figure 6 4 DHSSetImpedanceMeasureCurrent Command Syntax 23 Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 3 1 Document Overview This document describes the specifications and features of the multiplexing headstage It also explains how to set up your headstage test it and use 1t during normal operation There is a glossary at the end of the document 2 Multiplexing Headstage Overview This HS xx mux is a multiplexing headstage that records from up to 64 individual electrodes The physiological signals are digitized at the headstage which
4. Omnetics Connector Figure 5 4 HS 64 mux Input Pinout 2 HS xx mux User s Manual Revision 1 0 3 14 2014 Page 18 5 4 HS 36 Impedance Plug Resistance Values The following figure contains the resistance values of each channel on the HS 36 Impedance Plug iva iva iva iva iva iva iva iva Figure 5 5 HS 36 Impedance Plug Test Value Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 19 6 Multiplexing Headstage Command Descriptions Commands can be sent to the multiplexing headstage through NetCom to configure certain settings on the headstage These include Impedance Functions and Fast Settle Functions The following figures detail each command how it 1s used and its defaults It is not necessary that these be used at any time SendLynxS X Command Hardware Sub System Name DHSTriggerFastSettle lt Headstage gt lt Bank gt Triggers the Fast Settle Function The Fast Settle Function can be used to reset the headstage when large input signals have caused amplifier saturation The Fast Settle Function is approximately 300us Once this time has elapsed the Fast Settle Function is turned off Hardware Subsystem Name Name of sub system which will be controlled This value can be one of the following keywords Headings 1 Selects multiplexing headstage 1 as the command target 2 Selects multiplexing headstage 2 as the command target All Selects all multiplexing headstages as the command target This value c
5. allows the required number of cable conductors to be greatly reduced Features e Versions include HS 32 mux and the HS 64 mux e 5mV Input Range e gt 80dB Common Mode Rejection Ratio CMRR at 60Hz e lt 2 5uVems Noise 0 1Hz to 9kHz Interfaces directly with Digital Lynx SX e 25 Conductor Cable transfers up to 64 channels to Digital Lynx SX e Up to 128 Digital Channels per Digital Lynx SX e Compatible with Neuralynx EIBs 2 1 Important Note The multiplexing headstage must be connected to the Digital Lynx SX before the system is powered ON Otherwise the system won t recognize that a multiplexing headstage 1s present Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 4 3 What s included with the multiplexing headstage There are two different channel counts available as a multiplexing headstage the HS 32 mux and the HS 64 mux Both arrive already soldered to the tether with the TETH multiplexing headstage as an extension 3 1 HS 64 mux 64 Channels digitized on the headstage 2 Static References one per bank of 32 channels Compatible with HS 36 Series EIBs Standard 2 meter tether 5 0 grams 3 2 HS 32 mux 32 Channels digitized on the headstage 1 Static Reference for all 32 channels Compatible with HS 36 Series EIBs Standard 2 meter tether 4 0 grams 3 3 TETH mux headstage Revision 1 0 Compatible with any multiplexing headstage Standard 1 5 meter tether 3 14 2014 F
6. and void of any repetitive signals Refer to the figure below Figure 4 9 All Switches Up 25nV 4 4 Performing an Impedance Test The multiplexing headstage contains an internal AC current waveform generator that can output 9 different current amplitudes at IKHz The AC current waveform generator is controlled by sending specific commands to the Digital Lynx SX which are then routed Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 12 to the multiplexing headstage These commands can be sent through a NetCom interface or simply through a Cheetah Configuration File All Multiplexing Headstage Commands and their syntax are discussed in Section 6 Multiplexing Headstage Command Descriptions To begin the multiplexing headstage needs to be connected to the HS 36 Impedance Plug Connections 1 Disconnect the multiplexing headstage from the SM 64 2 Connect the multiplexing headstage to the HS 36 Impedance Plug In this example we will use a Cheetah Configuration File to perform an impedance test on Channel 25 of a multiplexing headstage using the following sequence of events this assumes all the hardware is still connected as shown in Section 4 1 Multiplexing Headstage Setup Command Sequence 1 Set the Impedance Measurement Channel to 25 2 Setthe Impedance Measurement Current to 3 85nA The Current Options for this command are listed in Section 6 Multiplexing Headstage Command Descriptions 3 85nA is option number 6
7. count of the Digital Lynx SX System is 512 Channels Number of Input HS 64 Digital Starting AD Total Channel Boards Channel Count 64 x g 0 mw 128 192 224 NEN GEN 192 256 288 AAA WAA KA Ln 288 337 352 416 3 416 480 Figure 4 2 Multiplexing Headstage Starting AD Channel 4 2 1 Configure Cheetah with the Proper Configuration Power On the Digital Lynx SX and wait for boot cycle to complete On the Computer open the Cheetah Configuration Folder Modify your preferred Configuration File to allow the multiplexing headstage AD Channels to be sent to Cheetah On the Desktop select the Run Cheetah shortcut to open the Cheetah Welcome Screen Boot Cheetah with a modified configuration file for your new setup In this example 32 CSCs are used Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 8 4 3 Drive Signal into the Multiplexing Headstage In Cheetah select the ACO Button to Start Acquisition Set the Input Range for all 32 CSCs to 1000uV and set the Reference for all 32 CSCs to Reference 1 Observe the 32 CSCs Each should show a reduced roughly 1mVpp version of the Minirator output Refer to the figure below N Time Window 1 ile Display Audio e CN UN UNI UN VAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVA VAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVA Wa Wa Wai VAVAVAVAVAVAVAVAVAVAVATA VAVAVAVAVAVAVAVAVATAVAMAMA VAVAVAVAVAVAVAMA ILA AAA AAAA sk WY SH Tk a WT Rk AENEA A Pd ECCE EMEN E E IE EAE EX EN A Figure 4 3 Bank
8. 1 2 3 and 4 Switches Up Reference Switch Down Switch the Bank 1 Switch to the Ground Position Down Observe the 32 CSCs CSCs 1 8 should now be flatlined while CSCs 9 32 still shows a reduced roughly 1mVpp version of the Minirator output Refer to the figure below Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 9 N Time Window 1 5000 ms CSC1 ca 8 E File Display Audio NAIAINIINNNINNNNINININININIINNINNNNNNNNINNNNNINANNINNNNNNNNNNNNNNINININNNNNNNNNNNNNINNINNINNNNNNNNNNNNINNNNNNNNNNNNNNN APPL ALA P PAR AP PP PPP PP PP PPP APPA PPP PP PP PP PP AP APP P PP PP LPPP PLA PPP PAP PPP AP PPP PL PP APA PAP PPP PPP PP PPAP ARAL AAA DPD YAYA YAYA YAYA YAYA YAYA YAYA VAN AAG WV Figure 4 4 Bank 2 3 and 4 Switches Up Bank 1 and Reference Switches Down Switch the Bank 2 Switch to the Ground Position Down Observe the 32 CSCs CSCs 1 16 should now be flatlined while CSCs 17 32 still show a reduced roughly 1mVpp version of the Minirator output Refer to the figure below N Time Window 1 5000 ms CSC1 ENT File Display Audio AYA YA AYA YA ADL APP AYA YAYA YA YAYA YAYA YATIA TAYA TA APP PPPPPPPPPPAPPLPLPPPPPPPPPPPPPPPPPAPAPPAPPPPPPPP PP PAP PPPPPPPPPPPPPPPPPPPPPAPPYIVAN PARAS AAA AAA YA AA LAA AVAA AVAA PAL YAYA YA YAYA YAYA YA YA YA YAYA AYA YAYA YAYA YA YAYA YA VAA YA YAYA YA YAYA TAYA AYA TAYA TAYA YATA YA YAYA YAYA VA YAYA TAYA VYA YA TATA YAYA VA YAO Enr 4 5 Bank 3 and 4 Switches Up Bank 1 2 and Refer
9. 9J9Y SH 0 fouuey TV Jsuuey dV amp c jouueyD AY Jouueq qv p jouueyd qv Jouueq qv K 9 jouueyd qv L ouueq qv g ouueq qv 6 ouueq qv 0I ouueq qv T Jouueq av c Jouueq AY 1 ouueq qv vi suey qv a ST jouueyD qv 4 joouuo ON punour poued 9o1nog c WINS p umjoy ums f punoJr jourg p 199uu00 ON p 91 ouueq qv L puue dV 81 puue dV IE 61 puue TV E Oc fouuey CIV c puue IV Cc jouuey IV m cc puue dv E vc puue qv c puue TV 97 ouueyD qv Lc Jouueq qv sc jouueyD qv 6c puue TV IE Ot puue TV e puue IV 10ouuo ON punour oueq unjes c WAS 44 Pin Female Nano Omnetics Connector Figure 5 3 HS 64 mux Input Pinout 1 92ua19JoM CSH o9uuo ON p 10ouuo ON punor oueq 4 punour poued p 399UU009 ON sp ouueq av 6r Puueyo qv Os jouueyD qv Is ouueq AY E cS foudey dV ce puuro V yi cc Puu qva be ouueyO dV E gc Jouuey dyg 9 JouUey TV Le jouueq qv K g ouueq qv ge jouuey qv ME rs puey av oc ouueq qv e ss uuu av Or ouueu qv N o puey av Ip ouueq qv Lg jouueyD qv cr jouuey qv N ss puue av cp ouueu qv N 6s puyo av pr ouueq qv Sp ouueq qv 9p ouueq V Ly ouueq dV 4 j ouuo ON 4 p 09 ouueq TV 9 Jouuey TV IE c9 ouURy dV 9 Jouuey TV 10ouuo ON punour poued 3 punour poued oouuo ON oouuo ON 44 Pin Female Nano
10. Neuralvnx HS xx mux User s Manual Multiplexing Headstage that allows recording on 32 or 64 individual electrodes O Neuralynx Inc 105 Commercial Drive Bozeman MT 59715 Phone 406 585 4542 Fax 866 585 1743 Neuralynx com Revision 1 0 support Neuralynx com 3 14 2014 Table of Contents k TOC Vi BO VEEVIG Wa 4 2 Multrmplexiab Headstase OVeLVIGW nerisieem ania UU TES OE 4 Zali SIDA NNA nee ney E Cre EE EN 4 3 What s included with the multiplexing headstage 0 0 0 0 ccccccccccceceeeeeeeeeeeeeeeeeeees 5 Dak TELS OAH niodo 5 J2 HS ono EUM 5 39 TETH HO3OSt TO er ee ere eC 5 3 4 Additional Testing Items secte bar oa Coa bete aas Id e opened entes 6 DA 291153204 acs eect t acne ected dec autora tue a E 6 3 12 HS0 DA 6 3 5 Electrostatic Sensitive Equipment wemmewneeeeennnannanenesemenawnnane 6 d URL ON IA Aa 7 4l Multiplexing Headstage Setup eye EUR ER CE b e est f A PME CENSENT TUUM 8 4 2 1 Configure Cheetah with the Proper Configuration 8 4 3 Drive Signal into the Multiplexing Headstage ec cccccccccceeeeseeeeeeeeeeeseeseeees 9 44 Pettormimp an Impedance VCS eed easet te O te sud ts ete 12 D gt lab ware OVeEVIe N ane AA AA 16 5 1 Multiplexing Headstage Amplifier and A D Converter 16 5 2 Multiplexing Headstage Communication eeeeesssssssssssseeeeeeeeeeeenenn
11. SSetImpedanceMeasureCurrent Command Syntax Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 23 7 Glossary CSC Neuralynx acronym for Continuously Sampled Channel EIB Neuralynx acronym for Electrode Interface Board Multiplexing Headstage mux Headstage that digitized the physiological signals at the headstage XX denotes the number of channels 1e HS 32 mux digitizes 32 physiological signals Revision 1 0 HS xx mux User s Manual
12. age and the Digital Lynx SX Digital signal quality degrades as cable length increases For this reason it is recommended that the total cable length of the multiplexing headstage not exceed 4 meters 5 3 Input Connectors The multiplexing headstage Input Connectors are the standard 44 pin Omnetics connectors used on the Neuralynx HS 36 This allows it to interface with all Neuralynx Electrode Interface Boards in the EIB 36 family The pinouts for the one multiplexing headstage Input Connector and the two multiplexing headstage Input Connectors are shown below Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 16 dOINOS UNS puno poued 99U9J9J9Y ISH 0 puue TV euueq TV 3 c puue TV c ouueq qv p ouueq qv puue dV f 9 puue AV E L jouuey dV 8 JouuRy V 6 euueq dV 0 PUGU dV E 11 Jouuey dv yi CI fouuey AV E I euueq qv pI ouueq qv ST jouueyD qv 4 yOOUUOD ON 4 punoJr oueq 99InOS 7 WHS p unos ums punoly oueq p OUD ON p 91 IJUULUY TV LI joeuuey dV 81 puue dV IE 61 puue qv E Oc jouuey IV c Jouuey IV Cc puue IV c jouuey dv B vc puw dv gc Jouuey dV mB 9c puue qv E Lc jouuey qv e puue V OUD ON punour poued unjes c WAS 44 Pin Female Nano Omnetics Connector Figure 5 2 HS 32 mux headstage Input Pinout HS xx mux User s Manual Revision 1 0 3 14 2014 Page 17 oo91nog ung punour oueq 99U91
13. an be one of the following keywords Bank 1 Selects Bank 1 first 32 channels as the command target 2 Selects Bank 2 second 32 channels as the command target All Selects all Banks as the command target Figure 6 1 DHSTriggerFastSettle Command Syntax Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 20 SendLynxSX Command Hardware Sub System Name DHSSetImpedanceMeasureEnabled lt Headstage gt lt Value gt Default The internal Electrode Impedance Measurement Circuitry is by default disabled This value can be one of the following keywords Headstage 1 Selects multiplexing headstage 1 as the command target 2 Selects multiplexing headstage 2 as the command target This value can be one of the following keywords Value 1 Enables the internal Electrode Impedance Measurement Circuitry 0 Disables the internal Electrode Impedance Measurement Circuitry Figure 6 2 DHSSetImpedanceMeasureEnabled Command Syntax Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 21 SendLynxSX Command Hardware Sub System Name DHSSetImpedanceMeasureCurrent lt Headstage gt lt Value gt Sets the current that the multiplexing headstage will use for its internal Electrode Impedance Measurement Circuitry Example SendLynxS XCommand AcqSystem1 DHSSetImpedanceMeasureCurrent 2 3 Default The Impedance Measurement Current Value is by default set to 1 but the internal Electrode Impedance Measurement Circuitry is by
14. default disabled Usage This Command can be used after the Digital Lynx SX Hardware Sub System has been created Hardware Subsystem Name Name of sub system that will be controlled This value can be one of the following keywords Headstage 1 Selects multiplexing headstage 1 as the command target 2 Selects multiplexing headstage 2 as the command target This value can be one of the following keywords Value AA AA 6 385 L8 112595 oo y S LL Figure 6 3 DHSSetImpedanceMeasureCurrent Command Syntax Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 22 SendLynxSX Command Hardware Sub System Name DHSSetImpedanceMeasureChannel lt Headstage gt lt Value gt Sets the channel that the multiplexing headstage will connect to its internal Electrode Impedance Measurement Circuitry Example SendLynxSXCommand AcqSystem1 DHSSetImpedanceMeasureCurrent 2 38 Default The Impedance Measurement Channel is by default set to 1 but the internal Electrode Impedance Measurement Circuitry is by default disabled Usage This Command can be used after the Digital Lynx SX Hardware Sub System has been created Hardware Subsystem Name Name of sub system that will be controlled This value can be one of the following keywords Headstage 1 Selects multiplexing headstage 1 as the command target 2 Selects multiplexing headstage 2 as the command target This value can be one of the following keywords Value 1 64 Figure 6 4 DH
15. ence Switches Down Switch the Bank 3 Switch to the Ground Position Down Observe the 32 CSCs CSCs 1 24 should now be flatlined while CSCs 25 32 still show a reduced roughly 1mVpp version of the Minirator output Refer to the figure below Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 10 N Time Window 1 5000 ms CSC1 e ua File Display Audio AYA PPA PARA RPA PPP PPP AP PAP PP PAP PP PPP PPPP LAP PPP PAP PPP PPP PPP PAP AP PAPA PP PP PP PP APPR APR APA APP PP PP PAP PAR AAA PAA PAPAYA PPP PPP A RAPP PAPA PAPA PPP PAPA PPV PAPAL PPA PAPA PPP PPP AYA YA YAYA PPP APPR APR PPP PAA PPP PAR APR AP PPP PPP AP PPA PAR AAV ATA YAYA AYA VA PPPPPPPLPPPPPPPPPPLPPPPPPPPPPPPPPYPPPPPPAPPPPPPPPLPPYIVPIPPLIIA Figure 4 6 Bank 4 Switches Up Bank 1 2 3 and Reference Switches Down Switch the Bank 4 Switch to the Ground Position Down Observe the 32 CSCs CSCs 1 32 should now be flatlined Refer to the figure below N Time Window 1 5000 ms CSC1 File Display Audio i cj Figure 4 7 All Switches Down 1000uV set the Input Range for all 32 CSCs to 254 V Observe the 32 CSCs CSCs 1 32 now show the baseline noise Each should be less than 25uVpp and void of any repetitive signals Refer to the figure below Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 11 Figure 4 8 All Switches Down 25pV Switch all the Switches to the Signal Position Up Observe the 32 CSCs Each should be less than 254 Vpp
16. f connecting to a DRS 36 Board or an Input Board the multiplexing headstage connects to the Digital Lynx SX Motherboard The multiplexing headstage connections are illustrated and described below r oi 3 O AT peunsIq jc XS xu L1 O o o O O O Figure 4 1 Hardware Connections Connections 1 Connect the multiplexing headstage to the connector labeled on the Digital Lynx SX Motherboard Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 7 a NOTE The multiplexing headstage must be connected to the Digital Lynx SX before the system is powered ON Otherwise the system won t recognize that a multiplexing headstage 1s present 2 Connect the multiplexing headstage to the SM 64 Connect the Minirator or other signal source to the SM 64 using a BNC Cable 4 Turn the Bank 1 2 3 and 4 switches on the SM 64to the Signal Position Up Turn the Reference switch on the SM 64 to the Ground Position Down 5 Setthe Minirator or other signal source to output a IVpp Sine Wave at 100 Hz The SM 64 will reduce this signal to roughly to 1mVpp 6 Power the Digital Lynx SX ON U 4 2 Start Cheetah In Digital Lynx SX Systems that already contain Input Boards it is important to note that the AD Channels associated with the multiplexing headstage begin after the last Input Board AD Channel This concept is illustrated in the table below This table assumes one multiplexing headstage is being used The maximum channel
17. igure 3 2 HS 32 mux Figure 3 3 TETH mux headstage HS xx mux User s Manual Page 5 3 4 Additional Testing Items Additionally a Signal Mouse SM 32 64 and an Impedance Plug HS 36 Impedance Plug can be purchased as separate items for testing the signal through the multiplexing headstage and the Digital Lynx SX 3 4 1 SM 32 64 e Interface for driving test signals into the multiplexing headstage e Switches control Bank 1 Bank 2 Bank 3 Bank 4 and the Reference 3 4 2 HS 36 Impedance Plug Test plug with different resistance values on each bank of eight channels Figure 3 5 HS 36 Impedance Plug 3 5 Electrostatic Sensitive Equipment All Neuralynx Equipment is Electrostatic Sensitive and should be handled with appropriate measures Always wear a static strap and use all appropriate ESD measures when handling any electronics Please contact Neuralynx for detailed information if you have questions Revision 1 0 HS xx mux User s Manual 3 14 2014 Page 6 4 Quick Start The following instructions are provided to quickly set up and test your multiplexing headstage setup If your Digital Lynx SX system requires the upgrade for compatibility with the multiplexing headstage please see the Digital Lynx SX HS Multiplexer Upgrade User Manual 4 1 Multiplexing Headstage Setup The multiplexing headstage connects to the Digital Lynx SX in a different way than a standard Neuralynx Analog Headstage Instead o
18. ns 16 5 5 Taput CONMECLOES seas pu aee MN Be UP E EA 16 5 4 HS 36 Impedance Plug Resistance Values eeeeeeeeeeeel 19 6 Multiplexing Headstage Command Descriptions cccccccccccceceeeeeeeeeaeeeeeeeeeeeees 20 T SSIOSSALY AA dieit tette dU bc ae teh otal eta 24 List of Figures and Tables Figure ove tio eT KA AA al M 5 eurc 2 2 AA AA E eee ee eee 5 Honre or TE TA ata oe IC AAS Ue 245 dec oe DS a one Lun 5 Eipure ESM OA AA bad cae Prud nid 6 Fig ure 3 5 H5 06 Impedance PIUS IA 6 Figure 4 1 Hardware one tons AAA 7 Figure 4 2 Multiplexing Headstage Starting AD Channel e000mmewa 8 Figure 4 3 Bank 1 2 3 and 4 Switches Up Reference Switch Down 9 Figure 4 4 Bank 2 3 and 4 Switches Up Bank 1 and Reference Switches Down 10 Figure 4 5 Bank 3 and 4 Switches Up Bank 1 2 and Reference Switches Down 10 Figure 4 6 Bank 4 Switches Up Bank 1 2 3 and Reference Switches Down 11 Figure 4 7 All Switches Down 1000gQV eeeeeeeeeeeseeseseseeeeeeeeeenennnnnnnn nnne 11 Figure 4 8 All Switches Down 251 tese entre b petu bes viet Eres Vete quedar buses 12 Proure 429 Aull Switches Up 251 M krina dole oot orte Poet Meli obediens 12 Figure 4 10 Example Configuration File seen 13 Figure 4 11 AC Current Waveform on Channel 25 77 seen 14 Figure 4 12 Channel Electrode
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