BSL PRO Software Guide - Biopac

Acquisition Functions 135ADVANCED TAB (OUTPUT PREFERENCES)Calibration adjustment—MP30 BSLSTM onlyConnect a BNC to BNC cable from the BSLSTM output connector to anoscilloscope input.Set the “Calibration adjustment: subtract” to “0.”Specify a pulse width of .2 ms.Send out a stimulus pulse.Measure the actual pulse width out of the BSLSTM stimulator with anoscilloscope.The Manual Test button on the back of the BSLSTM cannot be used to make theoscilloscope measurement.Calculate the time required to make the pulse width exactly .2 ms.Enter this time, in microseconds (1 ms = 1000 microseconds), into the “Calibrationadjustment: subtract” entry box.Pulse RepetitionIndicates the Pulse Repetition period (Hz or ms).The Pulse period must be greater than the Pulse width. See “TBPMIN” in the OutputPreference > Advanced Tab Limits table on the next page.The full range of acceptable Pulse Rate values is from .2 to 6,667 Hz (MP36/35) or .2 to6,827 Hz (MP30).The maximum Pulse rate (PRPMAX) depends on the Pulse width setting:Pulse width 100 ms maximum Pulse rate = 9 HzPulse width .020 ms maximum Pulse rate = 3333 HzThe formula for pulse width vs. pulse repetition is PRPMIN = PW + TBPMINWhere: PRPMIN = the MINimum Pulse Repetition Period allowed.PW = Pulse Width settingTBPMIN = MINinum Time (in ms) between successive pulsesfor the output device (see device specifications)If “Limit changes from ___ to ____” is selected in Advanced preferences, thenPRPMAX will be determined by the formula above or the specified limit, whicheveris greater.An entry may be automatically changed:If it falls outside the allowable range.To round it to .01 Hz increments (resolution of system).To make it at least 0.1 millisecond greater than the Pulse width.By the Pulse Repetition Rate: Limit entry Preference.By the Pulse Repetition: Adjust entry increments Preference.You may manually enter any value for pulse width, but when using the scroll bar orarrows, entries will be constrained by the “Adjust entry increments” Preference setting.Pulse Repetition ScrollBarDisplay asThe Pulse Repetition Scroll Bar adjusts rate or period by the increment of change andlimits established in Preferences. With each click of the scroll bar arrows, the rate will beincrease by the specified increment.When “Initiate pulse sequence with ON/OFF button in Control Panel” is selected,changes take effect upon release of the scroll box as long as the stimulator is running.The scroll bar is disabled when Number of Pulses is set to “Single” or Pulse Repetition isset to Lock Entry to...”Pulse repetition can be dispalyed asPulse Rate (expressed in Hz), orPulse Period (inverse of Pulse Rate, expressed in milliseconds).Pulse Repetition Rate relates to the Pulse Repetition Period as: