A unique instrumentation system for recording EMG and related signals.

Myopac was thoughtfully designed to combine the most important advantages of both wireless telemetric and traditional cable systems while at the same time avoiding their most important limitations. The primary advantage of wireless systems is that they allow a high degree of subject mobility. But they have many disadvantages as well: they are expensive, their signal bandwidths are restricted, and they are susceptible to RF interference and spontaneous signal loss. In contrast, traditional cable systems usually offer better signal reliability and a broader bandwidth at a more economical price, but their cables are bulky and necessarily short, severely restricting subject mobility. Now there is a better alternative -- Myopac!

Myopac is a telemetric system that employs a single digital fiber optic cable only 1/16 inch in diameter to transmit 27 channels of data from the small, lightweight, belt-worn transmitter unit to the remote receiver unit. The ultra-high carrying capacity of the fiber optic technology employed makes it possible to transmit all 27 channels at full bandwidth with exceptional fidelity. Moreover, because the transmission medium is optical, signals can be conveyed over long distances with no attenuation, RF interference, or cable artifact -- even in the most electrically noisy environment. Innovative engineering and solid craftsmanship make Myopac a truly unique system: an affordable instrument with signal bandwidth and reliability characteristics superior to most traditional cable systems, while at the same time providing a degree of subject mobility to rival even the best wireless systems.

• Versatile. With a total of 27 data channels -- 16 AC channels for surface or in-dwelling EMG, 8 DC channels for electrogoniometers, accelerometers, load cells, etc., 2 channels for 4-position multiplexed foot switches, and one marker/synch channel -- Myopac was designed to be the only EMG instrumentation system you will ever need.
• Compact. The signal processing and amplification electronics for all 27 data channels are housed in the small (5 3/4" x 3 1/2" x 2"), surprisingly lightweight (18 oz) belt unit.
• Portable. Both the belt unit and the receiver unit can be battery-powered for seven or more hours of continuous use without changing batteries. The receiver unit can be line powered as well, saving battery life for the times when you really need them.
• Convenient. The receiver unit is designed to fit neatly under your monitor or notebook computer. LEDs on the unit's front face let you easily monitor the system's most critical components: receiver unit power and battery status, belt unit battery status, and data transfer status.
• Simple. Turn the belt unit and receiver unit on, connect the fiber optic cable, and you are ready to record. Gain switches are conveniently located on the belt unit's back panel for easy accessibility. But the are recessed, making it virtually impossible to change settings inadvertently. Moreover, gain settings are retained until you reset them: there is no need to reset gains with every use.
• Accurate. We don't use smoke and mirrors, just solid engineering. Myopac's 10 Hz to 1000 Hz signal bandwidth meets or exceeds all current journal requirements for both surface and indwelling EMG recording. The system's superior accuracy in the amplification stage, 8 KHz/channel internal sampling rate, and immunity from electromagnetic interference in the transmission stage, ensure recordings of unsurpassed fidelity.
• No active electrodes required. Driven shields, multiple-pole active filters, superior CMRR, and other advanced engineering techniques, make costly and inflexible active electrodes unnecessary to achieve stable, reliable signals.
• Affordable. Despite its many unique and advanced features, Myopac is still one of the lowest priced systems available today on a cost-per-channel basis.