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WPI DS8000 Instruction Manual

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WPI DS8000 Instruction Manual

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  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 DS8000 Digital stimulator INSTRUCTION MANUAL Serial No._____________________ 042712 World Precision Instruments...

  • Page 4: Table Of Contents

    DS8000 CONTENTS 1.0 Introduction ..............................1 2.0 General Warnings and Cautions ......................3 Unpacking ................................4 3.0 Description ..............................5 3.1 General ...............................5 3.2 Microcontroller ............................5 3.3 Communications ............................5 3.4 Digital Control & Digital Signal Processing (DSP) ................5 3.5 Analog Outputs ............................6 3.7 Rear Panel Connections .........................7...
  • Page 5 DS8000 5.12 Combined TTL Screen ........................28 5.13 Scope Screen ............................28 5.14 Settings Screen ............................ 29 5.15 General Screen ............................ 30 5.16 GUI Screen ............................31 5.17 Memory Screen ........................... 33 5.18 Profile Screen ............................33 5.19 Communication Screen ........................34 5.20 FTP Screen ............................

  • Page 6: Introduction

    WPI’s DS8000 Digital Stimulator is compact and high-precision state-of-the-art equipment. It is built in accordance with the latest standards in digital and analog electronics technology. The DS8000 is a full menu driven touch screen sensitive input stimulator. This LCD screen displays the menus and...
  • Page 7 The manual may be routinely revised to take account of any software upgrades. In the meantime, if you need assistance with the DS8000 we would appreciate your call (tel.: 941- 371-1003, or email the Technical Specialist directly at ds8000@wpiinc.com).

  • Page 8: General Warnings And Cautions

    CAUTION: The maximum input voltages must not be exceeded. CAUTION: Repairs of an electrical or mechanical nature may only be carried out by an authorized WPI technician. NOTE: WPI reserves the right to adapt the equipment to the latest technical specifications at any time.

  • Page 9: Unpacking

    The DS8000 Packing list is as follows: • Instruction Manual (this document) • Quick Start card (Section 4 of the manual) • 6-foot (2m) BNC cables WPI P/N 2851 (four) • 90 degree BNC adaptors WPI P/N 500256 (four) • 9-pin Serial cable WPI P/N 13555 •...

  • Page 10: Description

    DS8000 3.0 DESCRIPTION 3.1 General The DS8000 Digital Stimulator is an 8-channel stimulator intended to control a wide range of stimulus isolation units. All of these parameters (duration, amplitude, interpulse intervals, delay) can be independently set for each channel. The analog signals are real-time converted digital values (24-bit resolution) and processed by a DSP.

  • Page 11: Analog Outputs

    DS8000 3.5 Analog Outputs The digital waveform of the signals, generated by the processor is applied to the digital to analog converters (DAC) and then driven out to the front panel BNC connectors. ITEM DESCRIPTION EXPLANATION OF FUNCTION Power Switch Toggle switch turns mains power on or off.

  • Page 12: Rear Panel Connections

    Fig. 2 Power Supply The Digital Stimulator DS8000 power supply operates over a wide input voltage and frequency range. The internal power supply module accepts mains power from 80 to 260 V AC, 45 to 65 Hz. The instrument consumes 50 Watts.
  • Page 13 DS8000 Computer Control (DB25 female connector, mating connector AMP747912-2) At present, this connector is not being used. Remote Control (DB25 female connector, mating connector AMP747912-2) This connector has 24 inputs. 16 inputs are dedicated to extra inputs, while the 8 others are inputs used by the External Trigger Inputs.

  • Page 14: Block Diagram

    DS8000 3.8 Block Diagram Protection TTLout OUTPUT COMBINED Vout Analog ANALOG OUTPUT PUSHBUTTON CHANNEL ON / OFF Digital Control Vout Analog ANALOG & DSP OUTPUT Temp SWITCHES Vex + - Differential / Vex - single ended Digital lex + - Rectifier...

  • Page 15: Installation

    (LAN) will be able to access the menu parameters, even though it is fully password protected. The DS8000 can be seen like another PC on a network since it has an IP address. Please refer to the Serial and Network Communications section for instructions.
  • Page 16 The page forward arrow date and time. will scroll through the major sections of the DS8000, while the individual tab (at the top of each screen) will take you to that selection. The page back (located on the upper left) when shown, will back the selection completely out of an area.
  • Page 17 (Fig. 4A). The output viewed on the built in LCD display is shown in Fig. 4B, upper trace. The DS8000 can trigger any TTL driven device via the TTL output (Combined TTL 1) or the Analog output (Analog 1) to a Stimulus Isolation Unit (SIU).
  • Page 18 DS8000 Fig. 6A— Step Fig. 6B Fig. 6C Fig. 6D Example A Ramp pattern using the Custom waveform The ramp on channel two (Fig. 6D) has a pulse width of 200 ms and is triggered off channel 8. Using the fixed step menu in the Custom selection under waveform to define point one at –2V at 0 time and point 2 at +2V at 200 ms.

  • Page 19: Operation

    5.0 OPERATION 5.1 General Parameters The DS8000 touch screen is the primary input for all operations of the stimulator. The DS8000 is programmed to respond to a gentle contact of a finger or blunt stylus held in place for 0.2 seconds of time. Some menus bring up another menu or modify a page.
  • Page 20 DS8000 Width — This area allows the pulse width time to be adjusted. All times are in ms (milliseconds). The range of the pulse width is .02 ms increments. The minimum pulse width of a bipolar pulse is in 0.04 ms increments.

  • Page 21: Trigger And Mode Screen Detail

    DS8000 5.3 Trigger and Mode Screen Detail Gate On Gate Off Fig. 14: Gate Icon Fig. 13: Trigger Screen Free Run — The waveform for this channel will run continuously, infinitely. Triggered Section — The waveform is triggered by a selected event. This menu selects the method by which the channel is triggered.

  • Page 22: Train Screen Detail

    DS8000 Timer started 1-3 — Selects one of three Internal clock timers to trigger the channel on starting (See section 5.6 for timer setup). Timer stopped 1-3 — Select one of three Internal clock timers to trigger the channel on stopping (See section 5.6 for timer setup).
  • Page 23 The clear key will reset all the values to zero. The save key records the data into the DS8000 output buffer. The channel display on the channel page will indicate “stepped” when this is active. Note that in the example the start voltage is the first step and a count of 5 steps from zero volts will end at 5 volts.

  • Page 24: Paired Pulse Modes Overview

    DS8000 5.5 Paired Pulse Modes Overview The DS8000 incorporates two modes that are specifically dedicated for creating paired pulse protocols: “Paired” and “T-Paired”. For the purpose of this discussion, we will define two terms: “paired event” and “series”. A “paired event” consists of a grouping of two pulses that are separated by a discrete time interval, (known as the “inter-pulse interval”), and is triggered as a single entity.A “series”...

  • Page 25: Paired Mode Screen Detail

    DS8000 5.6 Paired Mode Screen Detail Figure 21 depicts Channel 1 configured in Paired mode. To start and stop the protocol, simply check or uncheck the “Run” box on the channel screen (see section 5.2) or, alternatively, check the “Run” box for the respective channel on the RUN screen (see section 5.10).
  • Page 26 DS8000 Increment (ms) The Increment data field defines the discrete quantity of time by which the IP interval will change for each subsequent paired event in a series. If the sign of the Increment value is positive, the IP interval will increase accumulatively by the Increment value for each consecutive paired event.

  • Page 27: T-Paired Mode Screen Detail

    Manually, via the front panel touch screen by way of the “Trigger Now” button for the respective channel on the Run screen. Internal triggering from another channel on the DS8000. Internal triggering from the start or stop of an internal timer on the DS8000.
  • Page 28 DS8000 If T-Paired is operated in “cyclic” mode, it will still deliver one pairedevent for each trigger pulse it receives, however, the channel will continuously loop through a series a paired events as defined by the Nr of Steps data field as long as it continues to receive trigger pulses. The looping process will continue until trigger pulses are stopped, or the “Run”...

  • Page 29: Waveform Screen Detail

    DS8000 5.8 Waveform Screen Detail Unipolar pulse — This generated pulse will be a binary “one” on the TTL output or set to the output voltage on the analog outputs for the duration of the Width time within the Period (total waveform) time. An example is shown in Fig.
  • Page 30 0 and is held to 0 until 10 ms, where another entry at the 10 ms time commands the DS8000 to set the voltage to 3V. For square waves the points need to be entered in pairs for each time interval. Example #2: scope patterns shows a ramp where at time 0 the voltage is zero, but at time 10ms the voltage is 3V.

  • Page 31: Timer Screen

    DS8000 5.9 Timer Screen The timer screen allows the user to setup a single timer or a complex combination of timer sequences to count up or count down in seconds. Up/ down — Select this pad option for counting each timer up or down.

  • Page 32: Run Screen

    +8.3V and –4.7V respectively. The voltage output range is limited by +/-10V. CAx — This is the DS8000 channel number Ax — This is the BNC channel selection that is represented on the front panel of the DS8000.

  • Page 33: Combined Ttl Screen

    BNC. An amplitude summation is available on the combined analog screen and analog outputs. CTx – This is the DS8000 channel number Tx – This is the BNC channel selection that is represented on the front panel of Fig. 42 Combined...

  • Page 34: Settings Screen

    DS8000 Trigger edge — This button allows for a leading or falling edge trigger. Trigger indicator – This point is the indicator of the triggered point in time (Indicated by a small arrow pointing up). Trigger point move — These increment decrement buttons control the horizontal placement of the trigger point.

  • Page 35: General Screen

    The page forward will keep the user in the settings menu. The Back page selection will cause the DS8000 to inquire as to save all the changes and exits the settings submenus back to the Settings menu. The Save Dialog “Use and save all changes?”...

  • Page 36: Gui Screen

    In certain applications, it may be advantageous to quickly modify a specific timing or amplitude parameter in discrete increments while a stimulation pattern is in process. The DS8000 soft keys provide this capability. The soft keys are located immediately to the right of a numerical data field, as indicated in Figure 46, and are identified with either double or single signs.
  • Page 37 The desired small and large incremental values for the soft keys are defined by updating the values in the data boxes. A list of the DS8000 data variables for which soft keys exist is on the left. The column labeled “Small” lists the discrete quantities that will be incremented or decremented by each press of the and sof keys, and the “large”...

  • Page 38: Memory Screen

    Select Memory — This pull down dialog displays and selects the memory to be sent to the active run time memory of the DS8000. Name — This touch pad brings up the keyboard dialog pad for the memory name to be renamed.

  • Page 39: Communication Screen

    FTP Server — This is the FTP address of the host computers FTP site. Generally it is the same as the IP address of the host computer on its LAN. User Name — This is the name assigned on the host that the DS8000 will log on as.

  • Page 40: About Screen

    DS8000 to the correct folder). Import — This button will load filename.aq1 from the FTP host and load it into the DS8000. The DS8000 will perform a soft boot, the user must apply a cold boot for the waveforms to be loaded.

  • Page 41: Serial & Network Communication

    NOTE 1: An ethernet crossover cable may be substituted for the Hub/Switch and cables in Figures 53 and 55. NOTE 2: A second ethernet card may be installed in the PC and the DS8000 controlled via that ethernet connection while the first board controls the LAN connections. Use a unique IP address for the second card and the DS8000 communicates through TCP/IP.
  • Page 42 Most activities can be accomplished via the serial connections, except screen dumps and memory transfers. For installations on a public network (DSL, cable, satellite, etc.) a router/hub with a firewall is required. WPI makes no claim or guarantee that the unit will work behind thirdparty LAN hardware. Fig. 56: Typical TCP/IP Configuration Fig.

  • Page 43: Serial And Network Control

    DS8000 Serial Hardware Setup Use a standard (not crossed) serial cable to connect to a personal computer (WPI part number 13555). The DS8000 Digital Stimulator uses the soft Xon/Xoff handshake method, the hardware handshake signals are not used to control the communication. Serial port settings are: RS232 (V24/V28), 9600 baud, 8 data bits, no parity, 1 stop bit.
  • Page 44 User FTP Menu Definitions FTP server: 192.168.1.49 — This is the address of the FTP host computer. FTP user: test124 — This is the user login the DS8000 will use to log into the host computer. FTP Path: this is the sub-directory as specified by the FTP site in the host computer.
  • Page 45 Ping — Type a “P” and the name or IP address of another network element to check the network at IP level. The maximum response time is 1000 ms. Quit — logs the user out of this session. DS8000 Owner Communication * See default User name: OWNER...
  • Page 46 DS8000 DS8000 Administrator Menu Definitions A: Change Ethernet parameters — This menu will bring up a dialog for each Ethernet parameter: Ethernet addr: 00E082 001092 IP address : 192.168.1.152 -> a Subnet mask : 255.255.255.0 -> IPA Router : 0.0.0.0 ->...
  • Page 47 MailServerIPA: not used. FTP ServerIPA: The name or IP address of the file server. FTP USER name: The user account name of the DS8000 FTP Password: The user account password FTP Pathname: The pad or map in your account that the unit will use: ex: c:\.
  • Page 48 0 (XXXYYYZZZ software version 1.7.2.0 ) OK # 1 source ........…. When the program has uploaded completely the DS8000 will respond with a system restart. NOTE: The default settings will be loaded over any settings in all four memories.
  • Page 49 P : Ping USER OWNER ADMINISTRATOR Q : Quit USER OWNER ADMINISTRATOR <enter> : Repeat screen USER OWNER ADMINISTRATOR Network interface Connect up the DS8000 to a LAN (running at 10/100 base-T speed) by using a switch/hub to WORLD PRECISION INSTRUMENTS...
  • Page 50 LAN. The next section describes the setup menus for setting up a Stand-alone network, and attaching the DS8000 to an existing LAN. Before establishing an FTP site on a computer on an existing LAN, please check with your IP personnel.
  • Page 51 A secondary program called an FTP server emulator is required on the host computer where the FTP site will be located. This is not supplied by WPI. A number of server programs are available at various software download sites on the internet. A good search to use would be “FTP server”...

  • Page 52: Custom Waveform Via The Custom Table Loader Program

    Sending the waveform The IP address is of the DS8000 is entered into the UNIT ID field or the host computers comm port is chosen if the serial cable is being used. Select the DS8000 channel desired. Press the SEND button. A password dialog will pop up for either the OWNER or ADMINISTRATOR to enter a password.
  • Page 53 Fig. 68: Amplitude mode spreadsheet 6.4 Custom Waveform Via the Excel Macro A custom waveform of up to 1024 steps may be imported to the DS8000 via serial or network Fig. 69: Communications screen Fig. 70: Login popup Fig. 71: Transmission results...

  • Page 54: Custom Waveform Via The Excel® Macro

    /low of 30/70 percentage and a voltage offset of +10V to –5V when a range of 10V is selected in the amplitude window. Note: Using the percentage selection will modify the pulse width and voltage outputs of the DS8000. EGC selection — This selection imports the data stored on page 3 of the Excel®...
  • Page 55 Channel — Select the channel on the DS8000 that you wish to fill. Send — Sends the custom waveform data to the DS8000. A dialog will popup for password verification. Once the login button is pressed the Send Waveform display will pop up and display sending data, a successful transfer or a transmission error (Fig.
  • Page 56 1024 points before pasting in into the yellow value area on the main page. Follow the methods listed from the Send the waveform on to transmit the data to the DS8000. WORLD PRECISION INSTRUMENTS...

  • Page 57: Maintenance

    DS8000 7.0 MAINTENANCE 7.1 Cleaning Instructions The touch screen can be cleaned by a slightly moist cloth. No chemical cleaners must be used. 7.2 Scratch Prevention The unit is shipped with a special electrostatic touch screen (ETS) protector to prevent damage to the glass touch screen.

  • Page 58: Troubleshooting

    Replacing the fuse WARNING: DISCONNECT UNIT FROM MAINS SUPPLY Using a small screwdriver gently, pry out the cover/ fuse holder on the back of the DS8000 power input module. Replace the blown fuse with the appropriate 250VAC fuse, 5 X 20 mm.

  • Page 59: Technical Specifications

    DS8000 9.0 TECHNICAL SPECIFICATIONS 9.1 General Specifications Timing Parameters Period (total signal width) 0.04 ms to 10,737,418.24 ms (3 hours) Pulse Width 0.02 ms to 10,737,418.24 ms Bipolar Gap Width 0.00 ms to 10,737,418.24 ms Operating Modes Free run, triggered, gated, Train, DC...

  • Page 60: Software

    The CD that is supplied with the DS8000 is a vital part of this compliance. It contains the firmware revision that is loaded into the operating system of the DS8000.
  • Page 61 USER Rights The USER may upload and/or download to the host computer via FTP on the Ethernet connection for storage of the parameter file. The USER may load the DS8000 from a stored memory, but not save one. OWNER Rights The OWNER may upload or download parameter files to the host computer.

  • Page 62: Appendix 1: Stimulus Isolator Applications Cookbook

    Fig. 82: The settings Fig. 81: Example One and the signal level in current levels. The A395D/R for thedemonstration demonstration bipolar pulse on stimulation current is controlled by the bipolar pulse Channel Two amplitude setting in the DS8000 channel menu. WORLD PRECISION INSTRUMENTS...
  • Page 63 DS8000 10.3 A simple pulse train for the A365D/R or A385D/R High Current Digital Bipolar Isolator Using the same 5-element bipolar train example above for a digital isolator such as the A365D/R requires a “double” TTL pulse to activate its bipolar function, the point editor in the custom menu selection is employed to provide for this.
  • Page 64 DS8000 Fig. 86: Example 2, Channel One Fig. 87: Channel Two Fig. 88: Scope output starts pulse two at 50 ms after the trigger. Pulse one ends before pulse two starts. 10.5 A stepped pulse train sequence In this example a sequence of 10 voltage steps is trigger controlled by channel 7. For this example, Channel 7 is a free running trigger that has a period of 1000 ms, but could be setup with as an external triggered event.
  • Page 65 DS8000 Fig. 89: Train Definition Fig. 90: Pulse Width Fig. 91: Step defination Fig. 92: Calibration pulse Fig. 93: Check Pulse 5ms Fig. 94: Waveform Plan D1 = 10ms P1 = 5ms (Channel 5 width) D2 = 10ms P2 = 15ms (Channel 4 width)

  • Page 66: Appendix 2: Example Bioresearch Applications

    DS8000 11.0 APPENDIX 2: Example Bioresearch Application (Drug Injection/Perfusion System) An example outline of stimulation, drug injection and perfusion control. Total of one single perfusion cycle = 5 minutes (300,000 ms). Define channel 8 as the master control channel. Start this channel manually or by External start pulse via computer Data acquisition system control.
  • Page 67 DS8000 WORLD PRECISION INSTRUMENTS...

  • Page 68: Warranty

    WPI shall not be liable for any damage to data or property that may be caused directly or indirectly by use of this product.
  • Page 69 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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