BSL PRO Software Guide - Biopac

140 Part CREFERENCES TAB (OUTPUT PREFERENCES)Generate using You can specify how the Reference signal should be shown.If using analog input from CH1 - CH4, you may select actual or fixed (max) amplitudeand actual pulse or fixed pulse width. Fixed pulse widths are useful when the pulse widthis much smaller than the sample interval (1/sample rate) being used.For example, for Frog muscle stimulation, you may choose to use a 1 ms pulse width, buta sample rate of 200 samples/sec. to capture the muscle response. At this sample rate, thestimulus pulse could not be reliably recorded. By extending the displayed pulse width to100 ms, you will be guaranteed to always record the stimulus pulse.If using digital input from D1 - D8, select actual or fixed (15ms) pulse width.Visit the online support center at www.biopac.com