Instruction manual

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6 Input and Output 82
Pulse
Protocols
Figure 6-1: The parameter boxes on the Stimulator page of the Preferences dialog window.
In order to understand how protocols are created, it is necessary to define the terms used on
the Stimulator page of the Preferences dialog window:
Delay: This is the time between the beginning of the recording, at the clicking of the Record
button, and the first pulse. Delay is adjustable as follows:
WPI 118 (6500 ms), WPI Latrax 24 series
:(600 ms, 6s or 60 s).
Amplitude: This is the height or voltage of the pulse or wave being generated. The amplitude
programmed from the Preferences window will be the same for all pulses leaving the stimulus
output unless the amplitude is changed manually from the Preferences window or the Stimu-
lator Control Panel, or automatically from a programmed sequence (more later).
Number of Pulses: The total number of pulses that can be sent from the stimulator output
Pulse Width: The pulse is the basic unit of an output protocol and it has two basic dimen-
sions, amplitude, as described above, and length. The length of the pulse is also called pulse
width or pulse duration .
Pulse Frequency: This is the number of programmed pulses that are delivered in one second
period of time. The maximum frequency that can be set is dependent on the pulse duration.
Remember that the period (P) is the inverse of the frequency (F), or P = 1/F.
Time Off: This is the interpulse duration, i.e. the amount of time between two consecutive
pulses. Pulse Frequency is 1/(pulse width + Time Off).