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Trigno™
System User’s Guide
Onboard EMG Sensor
Trigno Avanti
™
sensors support a low noise, high fidelity sensing circuit for
detecting EMG (electromyographic) biofeedback signals from the surface of the
skin when muscles contract. The sensor bandwidth can be selected between
10-850Hz or 20-450 Hz and the input range of the sensor can be selected
between 22mV or 11mV depending on user needs.
Inertial Measurement Unit
Trigno Avanti
™
Sensors have a built-in 9 DOF inertial measurement unit which
can relay acceleration, rotation and earth magnetic field (compass)
information. Users can use this information to discern movement activity time-
synchronized with the EMG signals. One of 4 ranges can be selected for each
sensor to span ±2g to ±16g for accelerometer outputs and ±250°/s to ±2000°/s
for gyroscope outputs.
Data Synchronization
Data from each sensor and from each channel within a sensor are time
synchronized over the Trigno wireless communication protocol so no time skew
between data exists. A maximum of 16 sensors can stream data to a host base
station at one time.
Wireless Communication
The Trigno wireless communication scheme offers robust data transmission for
up to 16 sensors with a nominal distance of 20m. Under optimal environmental
conditions (no RF path obstructions or interfering sources), this nominal
distance can be notably superseded. The Trigno communication protocol is
robust to sharing RF space with common 2.4 GHz devices such as routers, smart
phones and WiFi devices.
Rechargeable Battery
Sensors contain a sealed rechargeable lithium polymer battery for multiple
hours of continuous use which can be extended when making use of low power
modes. Actual duration will depend on usage conditions. Charge status is
conveniently reported through the wireless communication.
Sealed Enclosure
The environmentally sealed enclosure protects the electronics from the ingress
of liquids and other environmental elements, and provides a high standard of
user safety and durability.
Internal Magnetic Switch
The Trigno Avanti sensors are equipped with an internal magnetic switch which
is used to perform RF pairing operations and can be used to the turn the sensors
off. To activate the internal magnetic switch, the sensor must be placed on the
magnet label located on the Base Station charging cradle. The internal magnetic
switch will only react when the software is performing an RF pairing operation,
