World Precision Instruments Biological Signals Amplifier Manuel d'instructions

INSTRUCTION MANUAL050707WARNING: Do not connect the Lab-Trax hardware to your computer until AFTER the software installation is complete.Data-Trax2™Da

. . Introduction 4

. . 6 Input and Output 94 Figure 6-18: Channels page of the Preferences dialog window set for testing an Output Sequence.Stimulator Page Figure 6-19:

6 Input and Output 95On the Stimulator page, select Pulses as the stimulating mode and set the parameters.• Toolbar StepsFreq (Hz) = 1; Amp (V) = 0.0

. . 6 Input and Output 965 Return to the Main window; select the CAPRecruit sequence from Sequences control on the toolbar. 6 Click the Record button

6 Input and Output 97 Figure 6-21: Output StatesSequences Digital states can be grouped together in Sequences. A Sequence allows timed execution of d

. . 6 Input and Output 98Firing a Sequence The Sequence Control on the Main toolbar is a menu containing sequences of analog or digital outputs defin

6 Input and Output 99EventsAs DataTrax2 acquires data, it is aware of the value of each data point as it happens. It should then be possible to "

. . 6 Input and Output 100Timed Events Timed events are triggered after a certain amount of time has passed. Timed events can be repeated, set N = 0

7 Using Settings 101Chapter 7: Using SettingsThe Settings MenuDataTrax2 offers users several choices for recording and displaying data. When certain

. . 7 Using Settings 102Creating a New Settings FileThe first step in creating a settings group is to create a settings file. Configure the DataTrax2

7 Using Settings 103Categories Settings files can be organized into categories within a group. To create a new category in the settings group, click

1 Quick Start 5Chapter 1: Quick StartStart here if you are already familiar with data recording concepts. This chapter contains all you need to know

. . 8 Export 104Chapter 8: ExportPrintingOnce you have recorded and analyzed your data, you’ll probably want to create a report or other presentation

8 Export 105 Figure 8-1: Text and image as displayed in the Journal window.Exporting DataData can be exported from DataTrax2 as either numbers or pic

. . 8 Export 106If data is exported from the Analysis or ScopeView windows, then only the data displayed in the window is exported.Data from the Anal

AAdd Data to Journal 37aliasing 10Amplitude 23Analysis 7Area 73Power 51Analysis window 8, 37, 39, 104ASCII 8Auto Find 37Auto Mark 37Autocorrelation 58

Multiple Sweeps 17Multipoint 56NNational Instrumentshardware 27Navigating Data 7Ooscilloscope 16PPaste 8Peak Analysis 66Period 7, 45png 8Power 7, 9Pre

. . 1 Quick Start 6• Clicking the Double Display Time button (little mountain) doubles the screen time. Therefore, a 10-second, full-screen display b

1 Quick Start 7Channel Mode Clicking on Channel Mode in Raw Data displays the input option available for a given channel. On a computed channel, cli

. . 1 Quick Start 8a single vertical line in Figure 1-1 on page 5). 4 The text attached to a mark can be seen at the bottom of the screen, just above

1 Quick Start 9On a given selection of data displayed in the Analysis window, the program can calculate and report the selected parameters. These are

. . 2 Acquisition 10Chapter 2: AcquisitionThe Basics Time, Temporal Resolution, Sample Speed, and Aliasing Temporal resolution in digitally recorded

2 Acquisition 11connected by a line, a sine wave with a frequency of 0.1Hz is displayed on the screen. Again, the wave displayed on the screen is not

. . 2 Acquisition 122 Open the Channels page in the Preferences dialog window and set the sampling speed to 1,000 samples per second. Record 10 secon

2 Acquisition 13For example, consider an ECG, whose total peak to peak amplitude is only 2 mV. The number of steps that can be resolved with an 16 bi

. . 2 Acquisition 14mains. The end result of using the 50Hz Low Pass filters is the creation of a quieter, more readable ECG. In general, the applica

2 Acquisition 15The dialog boxes (Figure 2-2 on page 15) show the options for starting the recording process for both groups of hardware. Figure 2-2:

. . 2 Acquisition 16a small piece of data prior to the trigger. To enable pretriggering, check the box next to the label Pretrigger (in the Start Mod

2 Acquisition 17not show the event that was trying to be captured. So the acquisition of data at the right moment requires a proper trigger. In the S

. . 2 Acquisition 18Sweep Length When operating in Scope mode, DataTrax2 takes “snapshots” of data. Each “snapshot” is called a sweep and has a pre-d

2 Acquisition 19

. . 3 Display 20Chapter 3: DisplayIntroductionFrom a functional standpoint, the DataTrax2 program is really two programs. It is primarily a data acqu

3 Display 21Each channel has its own set of controls located in a Channel Bar immediately above each channel’s data window (Figure 3-2 on page 21). Y

. . 3 Display 22for the position of the cursor is reported in the Clock Area in the upper right hand corner of the Main window. Single Cursor mode is

3 Display 23Main Window Display ConsiderationsRecorded data has two important dimensions: length and height. The length is the Time axis and the heig

You are free:to Share — to copy, distribute and transmit the workto Remix — to adapt the workUnder the following conditions:Attribution. You must attr

. . 3 Display 24 Figure 3-5: ECG viewed with a long screen time (top) and a short screen time (bottom).In the second example (Figure 3-6 on page 24),

3 Display 25Managing Amplitude DisplayThe vertical display of your signal is managed in a number of ways. In each channel toolbar (Figure 3-7 on page

. . 3 Display 26Rate function could be used on Channels 9-16 to calculate the heart rate of each animal from its recorded blood pressure on Channels

3 Display 27Note: Any changes to the default view, will also be made to the preferences and vice-versa.Channel Sizing Figure 3-8: The height of the d

. . 3 Display 28 Figure 3-9: Data file of weights hung from a transducer and the units conversion dialog window that sets volts to grams.Once recordi

3 Display 29Cursors 1 and 2. Enter the corresponding values in real units into the two value boxes on the right. In the Name area, enter the name of

. . 3 Display 30Units can also be set from the Channel page of the Preferences dialog window. Each channel can be set with the conversion factors pro

3 Display 31Preset Marks If you know the marks that you will be adding to the record prior to recording, you can store the mark text as preset marks

. . 3 Display 32Navigating By MarksMarks that are placed on the recording can serve as “sign posts,” indicating where important sections of data are

3 Display 333 Wait one minute, type “Test 2" and strike the Return or Enter key.4 Click Stop. Scroll through the data using the scroll bar on th

. . 3 Display 34 Figure 3-15: Online XYDisplay Considerations in Other Windows Data is only recorded in the Main window. However, other windows can r

4 Controls 35Chapter 4: ControlsMenusFile The DataTrax2 software supports all of the elements found in a standard File menu: Figure 4-1: The DataTra

. . 4 Controls 36Edit The DataTrax2 software supports elements found in a standard Edit menu: Figure 4-2: The Edit menu.Undo: Un-does the last comma

4 Controls 37OnlineXY: Displays realtime XY plot to the right of the Main window channels.Main Window: Brings the Main window to the foreground. Also

. . 4 Controls 38DownSample: Used to downsample the data. This reduces the information in the file and should be used with caution. Warning: This can

4 Controls 39Check for Updates: Checks the DataTrax2.com website for the latest version of the software. You need to be connected to the internet.Too

. . 4 Controls 40Clicking on the down arrow next to the view name, brings up the View control menu. You can switch the current view from this menu, c

4 Controls 41•Apply All: Applies the changes and fires all stimulators. As with Apply, on hardware that supports it, the change will happen at the ne

. . 4 Controls 42Apply: Applies any changes to the stimulus protocol made through the Stimulator Toolbar. Clicking Apply while recording will send a

4 Controls 43Units: Used to convert two raw data values to two corresponding calculated values, using a linear scale. For more information refer to t

DataTrax2 Manual i Introduction 1Welcome 1How to Use This User’s Guide 1System Requirements 1Installation 1Registration and Updates 2Comments and Sugg

. . 5 Analysis 44Chapter 5: AnalysisOverviewToday’s analog to digital converters make acquiring data very easy. The challenge to all users is to extr

5 Analysis 45Note: Deleting the raw data channel will cause the function channel to have invalid data.Periodic Periodic functions operate on cyclic d

. . 5 Analysis 46Exercise To see Threshold and Tolerance in use, record some pulse data using the Tutorial setting from one of the Settings groups. A

5 Analysis 47Negative: Only the negative data points are included in the calculation.Data points with values above zero make the Integral larger, tho

. . 5 Analysis 48 Figure 5-3: Integral with ZeroThe Reset control in the Integral Setup dialog window determines when the Integral or running count w

5 Analysis 49Also enter this X value in the text box below the graph. Clicking the Calibrate Difference between Cursors button will calculate the req

. . 5 Analysis 50unclosed parentheses or division by zero. Since division by zero is a possible occurrence even in legitimate expressions, but it can

5 Analysis 51Notice that the filter is subject to the Nyquist limitation of frequency. The maximum frequency in the Filter Setup dialog is exactly ha

. . 5 Analysis 52known as a Power Number. In addition to specifying the range of frequencies transformed, the frequency resolution can be selected. T

5 Analysis 53In this function, a preset frequency band is available for each component of the EEG: Alpha, Beta, Theta, Delta, Betalow, Beta Mid and B

ii DataTrax2 ManualChapter 5: Analysis 44Overview 44Analyses of the First Kind: Wave-to-Wave Transforms 44Analyses of the Second Kind: Digested Data 5

. . 5 Analysis 54Digital Input The Digital Input function treats the data on the selected channel as a binary number.The functions in the Digital Inp

5 Analysis 55CrossTime Channel CalculationInitial Delay: The amount of time from the start of recording until the function is initiated.Selection Dur

. . 5 Analysis 56MultiPoint CalibrationMultiPoint Calibration can be used to perform a linear and non-linear calibration of sensors, transducers, amp

5 Analysis 57Template MatchTemplate Matching is a technique in digital signal processing for finding small parts of a signal which match a template.

. . 5 Analysis 58Auto CorrelationCorrelation is the mutual relationship between two or more random variables (Ali). AutoCorre-lation is the correlati

5 Analysis 59Analyses of the Second Kind: Digested DataThe functions in this kind of analysis take a group of data points selected by the user and &q

. . 5 Analysis 60 Figure 5-7: The DataTrax2 Analysis window.Analysis Window ComponentsFunctions List The functions selected in the Add Functions list

5 Analysis 61Channel Menu in the Analysis WindowClicking on the Channel Menu button or right-clicking in the display area of the Analysis window brin

. . 5 Analysis 62V2-V1: Value2-Value1, i.e. the difference in value between the cursorsT2-T1: Time2-Time1, i.e. the difference in time between the cu

5 Analysis 63SpirometryTV: Tidal VolumeIRV: Inspiratory Reserve VolumeERV: Expiratory Reserve VolumeFEV1: Forced Expiratory Volume in one second. How

Introduction 1 IntroductionWelcomeThank you for choosing WPI DataTrax2 Data Recording and Analysis Software. Developed over a 5-year period, DataTra

. . 5 Analysis 64ECGTime at R: Time at the peak of the R-wave.PR Interval: The time from the beginning of the P wave to the peak of the R wave.P Dura

5 Analysis 65Blood PressureLVEDP pressure: Left Ventricular End Diastolic PressureTime at LVEDP: Time at LVEDPMax Pressure: Maximum of the pressure,

. . 5 Analysis 66Cycle Duration: Time between LVEDPs Relaxation Index: (Minimum Slope) / (Pressure at Minimum Slope)Tau (Mirsky): Time for pressure t

5 Analysis 67Trailing Slope: Average slope of the signal as it travels from the upper threshold to the lower thresholdMax Slope: Maximum slopeMin Slo

. . 5 Analysis 68XY View Window ComponentsSelecting Channels To plot an XY graph, select the X-axis channel from the drop-down box in the top most pl

5 Analysis 69Table Functions These functions are available in the XY window.General Y1: Value of Y-Axis Channel at Cursor 1.Y2: Value of Y-Axis Chann

. . 5 Analysis 70Channel Menu in the XY WindowClicking on the Channel Menu button or right-clicking in the display area brings up the Channel menu. A

5 Analysis 71the maximum frequency that could be recorded reliably would be 500Hz. If a recording was made at 100 samples per second, the maximum fre

. . 5 Analysis 72 Figure 5-8:FFT WindowDisplay Channel Located in the upper left of the channel display area, this drop-down box allows the user to

5 Analysis 73Table Functions These functions are available in the FFT window.General Power1: Power at Cursor 1Power2: Power at Cursor 2Freq1: Frequen

. . Introduction 21 Insert the DataTrax2 installation CD. 2 A welcome screen will appear offering to install Software.3 Follow the instructions pres

. . 5 Analysis 74Analyses of the Fourth Kind: Detected Data ConditionsDataTrax2 software can be used to identify Regions Of Interest (ROI) in recorde

5 Analysis 75• Copying values and their headings to the Journal via the Add Title to Jrnl and Add Data to Jrnl functions in the Right-Click menu of t

. . 5 Analysis 76After the number of repetitions specified or the specified end of the Auto Find routine is reached, the Auto Find routine can be sav

5 Analysis 77 Figure 5-11: ECG AutoMark Dialog Figure 5-12: ECG AutoMark Example

. . 5 Analysis 78Blood Pressure Figure 5-13:Blood Pressure Automark Dialog Figure 5-14: Blood Pressure Automark Example

5 Analysis 79Peak AnalysisAnalysis of the Fifth Kind: Things Not Possible with 1st, 2nd, 3rd, or 4th Kinds of AnalysesNot Yet Implemented in DataTrax

. . 5 Analysis 80For example, we have created a script in Python, which operates on the R-R intervals of the ECG, which are detected by an Auto Mark

6 Input and Output 81Chapter 6: Input and Output StimulatorThe Stimulator page in the Preferences dialog box controls the Digital-to-Analog Converter

. . 6 Input and Output 82Pulse Protocols Figure 6-1: The parameter boxes on the Stimulator page of the Preferences dialog window.In order to understa

6 Input and Output 83Holding Potential: This is a voltage between ±10V that can be programmed to shift the resting voltage of an excitable tissue (l

Introduction 3• Note your computer model.• Note your operating system version.• Note the amount of RAM (Random Access Memory) in your computer.• Not

. . 6 Input and Output 84Holding Potential 0 VThese settings will create a protocol that delivers continuous square waves with 1V amplitude and 100Hz

6 Input and Output 85 Figure 6-4: The parameter boxes on the Stimulator page for Train mode.The terms used on the Stimulator page of the Preferences

. . 6 Input and Output 86Holding Potential: This is a voltage between ±10V that can be programmed to shift the resting voltage of an excitable tissue

6 Input and Output 87 Figure 6-5: Burst of pulses separated by Inter Train Durations.Constant Voltage ProtocolSelecting the Constant (voltage) option

. . 6 Input and Output 88If the user knows the voltage increment needed at each step, the equation can be transposed to solve for the Number of Steps

6 Input and Output 896 To create a step protocol where the voltage returns to a baseline value between steps, alter the Time Off to a number greater

. . 6 Input and Output 90Delay Amplitude: The amplitude during the delay period. Only available on the WPI 3xxStart Amplitude: The starting amplitude

6 Input and Output 91Holding potential: The amplitude during the interprotocol duration. Should be set to Start Amplitude if not being usedThe Stimul

. . 6 Input and Output 92Step Mode Figure 6-14: The Stimulator Step Control Panel.A1: Starting AmplitudeA2: Stopping Amplitude.#steps: Number of Step

6 Input and Output 93Rise time: The time taken to go from the Start Amplitude to the Stop Amplitude# Triangles: Number of TrianglesIR: Time between T