BSL PRO Software Guide - Biopac

More documents

Recommendations

Info

238 Part DEnabling Auto threshold detect enables Noise rejection and Window options.NoiserejectionWindowBiopac Student Lab constructs an interval around the threshold level when Noise rejection is checked.The size of the interval is equal to the value in the noise rejection text box, which by default is equal to5% of the peak-to-peak range. Checking this option helps prevent noise “spikes” from being countedas peaks.The Window section prompts you to specify an upper and lower limit for the rate calculation. Bydefault, these are set to 40 BPM for the lower criterion and 180 for the upper criterion, but may beadjusted as necessary. Setting the upper and lower bounds for the “window” tells Biopac Student Labwhen to start looking for a peak. Biopac Student Lab will try to locate a peak that matches theautomatic threshold criteria within the specified window. If no peak is found, the area outside theenvelope will be searched and the criteria (in terms of peak value) will be relaxed until the next peak isfound.For instance, once the first peak is found, Biopac Student Lab will look for the next peak in an intervalthat corresponds to the range set by the upper and lower bounds of the window. The interval withassociated with the upper band of 180 BPM is 0.33 seconds (60 seconds ÷ 180 BPM), and the intervalfor the lower band is 1.5 seconds (1 minute ÷ 40 BPM). If a second peak is not found between .33seconds and 1.5 seconds after the first peak, then Biopac Student Lab will look in the area after 1.5seconds for a “smaller” peak (i.e., one of lesser amplitude). For those rate functions that require awindow interval in seconds, you will probably want to enter numbers like .33 seconds and 1.5 seconds(which correspond to the BPM defaults of 40 and 180). These numbers will be suitable for detectingthe heart rate of an average subject.A simple peak detector uses what is called a threshold-crossing algorithm, whereby each time theamplitude (vertical scale) value exceeds a given value, the peak detector “remembers” that point andbegins searching for the next event where the channel crosses the threshold. The interval between thetwo occurrences is then computed and usually rescaled in terms of BPM or Hz. This is how the BiopacStudent Lab Rate Calculation functions when all options are unchecked.Windowing Units are related to the selected “Function.”Rate Functions related to peak or peak time specify the unit after the Function. This is a fixed unit, sothe Windowing Units menu will be disabled.Rate Functions related to data within a cycle can be specified in units of frequency (Hz) or time (BPMor seconds). The Windowing Units menu will be enabled,a nd when a unit is selected the software willconvert the Min and Max settings to the selected units.In the sample waveform here, the threshold wasset to 390 mVolts to detect of the peaks of thewaveform and provide an accurate ratecalculation. Since it only recognizes signalsgreater than 390 mVolts as a peak, this 390-mVolt threshold is referred to as an “absolutethreshold.”Most waveforms are not so well behaved,however, and artifact can be introduced as aresult of movement, electrical interference, and soforth.Combined with actual variability in the signal ofinterest, this can result in “noise” being includedwith the signal, as well as baseline “drift” whichcan render absolute threshold algorithms useless.Visit the online support center at www.biopac.com
239Put Result inNew GraphFind Rate ofEntire WaveDon’t FindWhen this option is checked, the results from the find rate calculation are plotted in a new graphwindow with data displayed in X/Y format, with time on the horizontal axis. By default, this optionis unchecked and the resulting transformation is placed in the lowest available channel of the currentgraph.When this option is checked, the rate (or other function from the Find Rate command) will becalculated for the entire wave (other than the selected area, if any).The Don’t Find button is useful when you realize you have not selected an area, or you want tochange the selected area to perform the Find Rate function on. When you click Don’t find, the dialogsettings will be saved so that you can close out of the dialog and select an area. When you reopen thedialog, the settings will be established as before, and you can click the OK button to perform theFind Rate function. This is useful for setting parameters using an area of a waveform (describedabove) and then repositioning the cursor at another point in the record.
Page 1 and 2:
Biopac Student Lab PRO ManualProfes
Page 3 and 4:
Selecting an area..................
Page 5 and 6:
Autoplotting and Scrolling ........
Page 7 and 8:
Show modified input................
Page 9 and 10:
Visit the BIOPAC website for more i
Page 11 and 12:
Welcome 11Using this ManualThe Biop
Page 13 and 14:
Welcome 13Biopac Student Lab PRO Fe
Page 15 and 16:
Welcome 15PC 3.7.7 FeatureDescripti
Page 17 and 18:
Welcome 17PC 3.7.7 FeatureDescripti
Page 19 and 20:
Welcome 19Biopac Student Lab PRO Be
Page 21 and 22:
Welcome 21PRO LessonsPRO Lessons il
Page 23 and 24:
23Part A — IntroductionPart A - I
Page 25 and 26:
Introduction 25b) You may have a de
Page 27 and 28:
Introduction 27Launch errorsBSL PRO
Page 29 and 30:
Introduction 29The Data Viewing Scr
Page 31 and 32:
Introduction 31IconFunctionShow/Hid
Page 33 and 34:
Introduction 33Right-click Shortcut
Page 35 and 36:
Introduction 35ScaleAny changes you
Page 37 and 38:
Introduction 37Vertical scaleClick
Page 39 and 40:
Introduction 39When Optimize Range
Page 41 and 42:
Introduction 41Overlap Segments may
Page 43 and 44:
43Part B — Recording DataPart B -
Page 45 and 46:
Recording Data 45Set up channelsSel
Page 47 and 48:
Recording Data 47Setup Acquisitions
Page 49 and 50:
Recording Data 49Chapter 3Selecting
Page 51 and 52:
Recording Data 51GridsYou can apply
Page 53 and 54:
Recording Data 53Transforming dataT
Page 55 and 56:
Recording Data 55Journal File Funct
Page 57 and 58:
Recording Data 57NOTE: You may also
Page 59 and 60:
Recording Data 59Customizing Menu F
Page 61 and 62:
Recording Data 61The Startup script
Page 63 and 64:
Recording Data 63Adding BSL PRO Ana
Page 65 and 66:
Recording Data 655. Set Q = 0 to en
Page 67 and 68:
Acquisition Functions 67Chapter 5Re
Page 69 and 70:
Acquisition Functions 69Advanced Ch
Page 71 and 72:
Acquisition Functions 71Acquire Dat
Page 73 and 74:
Acquisition Functions 73View/Change
Page 75 and 76:
Acquisition Functions 75Analog scal
Page 77 and 78:
Acquisition Functions 77Plot Standa
Page 79 and 80:
Acquisition Functions 79Chapter 6Se
Page 81 and 82:
Acquisition Functions 81Sample Rate
Page 83 and 84:
Acquisition Functions 83EXAMPLES OF
Page 85 and 86:
Acquisition Functions 85Acquisition
Page 87 and 88:
Acquisition Functions 87Chapter 7Ch
Page 89 and 90:
Acquisition Functions 89Input Chann
Page 91 and 92:
Acquisition Functions 91Digital Fil
Page 93 and 94:
93 Acquisition FunctionsCalculation
Page 95 and 96:
Acquisition Functions 95Average ove
Page 97 and 98:
Acquisition Functions 97Integrate
Page 99 and 100:
Acquisition Functions 99INTEGRATE
Page 101 and 102:
Acquisition Functions 101Calculatio
Page 103 and 104:
Acquisition Functions 103Rate Usage
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Acquisition Functions 113Digital ch
Page 115 and 116:
Acquisition Functions 115Control di
Page 117 and 118:
Acquisition Functions 117Chapter 8O
Page 119 and 120:
Acquisition Functions 119CH# to Out
Page 121 and 122:
Acquisition Functions 121Voltage Ou
Page 123 and 124:
Acquisition Functions 123To use one
Page 125 and 126:
Acquisition Functions 125Preference
Page 127 and 128:
Acquisition Functions 127The option
Page 129 and 130:
Acquisition Functions 129Output Con
Page 131 and 132:
Acquisition Functions 131GENERAL TA
Page 133 and 134:
Acquisition Functions 133GENERAL TA
Page 135 and 136:
Acquisition Functions 135ADVANCED T
Page 137 and 138:
Acquisition Functions 137Output Pre
Page 139 and 140:
Acquisition Functions 139REFERENCES
Page 141 and 142:
Acquisition Functions 141Usage Guid
Page 143 and 144:
Acquisition Functions 143Chapter 9G
Page 145 and 146:
Acquisition Functions 145IndicatorO
Page 147 and 148:
Acquisition Functions 147Setting up
Page 149 and 150:
Acquisition Functions 149Chapter 10
Page 151 and 152:
Acquisition Functions 151Show Input
Page 153 and 154:
Acquisition Functions 153Autoplotti
Page 155 and 156:
Acquisition Functions 155Rename a P
Page 157 and 158:
Analysis Functions 157Chapter 11 Me
Page 159 and 160:
Analysis Functions 159IMPORTANT! Th
Page 161 and 162:
Analysis Functions 161The table bel
Page 163 and 164:
Analysis Functions 163MEASUREMENT A
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Analysis Functions 173EXAMPLE OF MA
Page 175 and 176:
Analysis Functions 175Unlocked Grid
Page 177 and 178:
Analysis Functions 177A few Grid Op
Page 179 and 180:
Analysis Functions 179Chapter 12 Fi
Page 181 and 182:
Analysis Functions 181Text files (*
Page 183 and 184:
Analysis Functions 183After OK is c
Page 185 and 186:
Analysis Functions 185Save Options
Page 187 and 188: Analysis Functions 187PrintThe Prin
Page 189 and 190: Analysis Functions 189Preferences..
Page 191 and 192: Analysis Functions 191Journal Prefe
Page 193 and 194: Analysis Functions 193Chapter 13 Ed
Page 195 and 196: Analysis Functions 195ClearThe Clea
Page 197 and 198: Analysis Functions 197Copy GraphCop
Page 199 and 200: 199Chapter 14 Transform menu comman
Page 201 and 202: 201Digital FiltersThere is a fair a
Page 203 and 204: 203FIR Filter exampleComparison of
Page 205 and 206: 205The following table describes th
Page 207 and 208: 207Math FunctionTransformation Resu
Page 209 and 210: 209A drifting baseline can be a pro
Page 211 and 212: 211IntegralThe integral function is
Page 213 and 214: 213SmoothingSmoothing computes the
Page 215 and 216: 215DifferenceThe Difference functio
Page 217 and 218: 217ResampleThis function resamples
Page 219 and 220: 219SourceFunctionOperatorDestinatio
Page 221 and 222: 221WAVEFORM MATH EXAMPLEWaveform Ma
Page 223 and 224: 223Fast Fourier Transformation cont
Page 225 and 226: 225The raw data, prior to FFT:This
Page 227 and 228: 227Don’t Find — Allows you to r
Page 229 and 230: Find Next Peak229If you select Find
Page 231 and 232: 231FIND PEAK -- DATA REDUCTION EXAM
Page 233 and 234: 233FIND PEAK -- OFF-LINE AVERAGING
Page 235 and 236: 235A time offset can be added to th
Page 237: 237Find RateThe Find Rate function
Page 241 and 242: 241Tile WaveformsChoosing Tile wave
Page 243 and 244: 243Autoscale HorizontalThe Autoscal
Page 245 and 246: 245Horizontal Axis...This option ge
Page 247 and 248: 247Statistics...The Statistics comm
Page 249 and 250: 249n the hardware portion of the di
Page 251 and 252: Appendices 251Media SetupVideo Capt
Page 253 and 254: Appendices 253Recording Media While
Page 255 and 256: Appendices 255The playback can be s
Page 257 and 258: Appendices 257Data file nameBPM Gau
Page 259 and 260: Appendices 259Data file nameEEG.acq
Page 261 and 262: Appendices 261Data file nameHeartTe
Page 263 and 264: Appendices 263Data file nameSS19L G
Page 265 and 266: Appendices 265Data file nameValidat
Page 267 and 268: Appendices 267Analog Preset NameCha
Page 279 and 280: Appendices 279Calculation PresetNam
Page 285 and 286: Appendices 285Electrodes are relati
Page 287 and 288: Appendices 287DC InputUse the DC In
Page 289 and 290:
Appendices 289MP36/35 Input > Outpu
Page 291 and 292:
Appendices 291Appendix E - Frequent
Page 293 and 294:
Appendices 293Q: My MP UNIT seems t
Page 295 and 296:
Appendices 295Appendix G — Filter
Page 297 and 298:
Appendices 297The first graph shows
Page 299 and 300:
Appendices 299Appendix H — About
Page 301 and 302:
Appendices 301Appendix I — Accele
Page 303 and 304:
Appendices 303Hot KeySeqAltkeysSeqG
Page 305 and 306:
305IndexA/D boards (third party), 2
Page 307 and 308:
Index Index 307IIR Filters, 201Inte
Page 309 and 310:
Index Index 309PlotAutoPlotting opt
Page 311:
Index Index 311Wave Color, 244Wavef
show all

BSL PRO Software Guide - Biopac

Create successful ePaper yourself

Delete template?

Save as template?