BSL PRO 4 Manual - Biopac

Part A — Getting Started 89Measurement Area ExplanationEndpoints ofselected areaDelta T(time) Minimum area: The Delta T/F/X measurement shows the relative distance in horizontal unitsDelta F2 samples bet ween the endpoints of the selected area. Only one of these three units will be(frequency)dis played in the pop-up me nu at a given time, as determined by the horizontalDelta X (arbitrary Uses:scale settings.unit)Endpoints ofMeasurement Horizontal Axisselected area Delta TTimeDelta FFrequency (FFT)Delta XArbitrary units (Histogram Bins)The formula for Delta T/F/X is:Delta T x n x1Where:x1 , xn- values of horizontal axis at the endpoints of selected area.Results:If the data value at the starting location is greater than the data value at theending location of the cursor, then a ne gative delta will result. Otherwise, apositive delta will result.For Delta T measurements with the horizontal axis format set to HH:MM:SS. For values less than 60 seconds, you will get a value in decimalseconds. For values greater than 60 seconds, you will see an HH:MM:SSformat value(See page 66 for details on how to change the horizontal scaling).U nits:Delta T: Seconds (sec.)Delta X: “arbitrary unit”Delta F: HzSample data file: “ValidateMeasurements.ACQ”Result: 0.12 sec. (for whole wave).Evt_amplEvt_countEvt_locExtracts the value of the measurement channel at the times where events aredefined. The measurement result is unitless. Specify Type, Location, and Extract;see page 193 for details.1. The amplitude is always taken from the measurement channel, which may bedifferent from the channel on which events are defined.Evt_amp can be useful for extracting information such as the average T waveheight within the selected interval.Evaluates the number of events within the selected area. The measurementresult is unitless. Specify Type and Location; see page 194 for details.Extracts information about the times of events. The measurement result uses theunits of the horizontal axis. Specify Type, Location, and Extract; see page 194 fordetails.BSL PRO Manual