Conventional TENS
(Local Relief)  This is the most proven mode of TENS and is usually most effective for relief of "local" moderate to superficial myofacial type pain.
Modulation -(SAM) Simultaneous Asynchromous Modulation
(Local relief) This is an asynchromous (out-of-sync) combination of rate and width modulation.  This is a variation of conventional TENS, which may offer a "subjective" variation in sensation.
BURST
(Systemic relief)  Burst TENS is a variation of low rate TENS with a more comfortable delivery of "bursts" of low frequency versus "beats" of low frequency.  This method appears to be more acceptable for patient compliance.  Low rate types of TENS might improve efficacy on deep diffuse types of pain.  It may increase endorphins in the cerebral spinal fluid.

Amplitude Output
Two constant current outputs, each independently adjustable from 0-60 milliamps.  Constant current into a load impediance from 1000-3000 ohms at normal amp settings.
Output Waveform
Rectangular pulse with "0" net D.C. value.
Conventional Mode
Pulse rate fixed at 100 pulses per second.  Pulse width fixed at 125 microseconds.
Burst Mode
Pulse width fixed at 200 microseconds.  Pulse burst at 2 burst of pulses per second.  Each burst of pulses to contain 7 pulses operating at a frequency of 100 pulses per second.
Modulation Mode
Rate will be modulated from 100 pulses per second to 50% of the set value.  Pulse width will be modulated from 125 microseconds to 50% of the set value out of phase with rate.  The modulation frequency is nominally .25 HZ.  Modulation is a linear ramp-down, ramp-up mode without any discontinuities.
Channel Interaction
Less than +/- 1% with second channel into 1,000 ohm load.
Channel Phase
Both outputs are in phase.