LSI System II User Manual

10
Frequency Difference Method
With this method, both channels produce uninterrupted medium frequency current but of a slightly different
frequency. As an example, channel 1 produces 4000Hz and channel 2 produces 4080Hz. The difference
between the two frequencies produces a “beat frequency” of 80Hz (the difference between the two channels).
This beat frequency is created because the two channels will be in phase 80 times per second, thus adding
their respective amplitudes together for intensied stimulation.
With this method, both channels produce uninterrupted medium frequency current but of a slightly
different frequency. As an example, channel 1 produces 4000Hz and channel 2 produces 4080Hz.
The difference between the two frequencies produces a ‘beat frequency” of 80Hz (the difference between
the two channels). This beat frequency is created because the two channels will be in phase 80 times
per second,thus adding their respective amplitudes together for intensified stimulation.
Channel 1
4000Hz
Channel 2
4080Hz
Beat Frequency
3
4000Hz
Channel 1
4080Hz
Channel 2
Beat Frequency
Frequency Difference Method

LSI System II Specifications

General

Brand	LSI
Model	System II
Category	Test Equipment
Language	English