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EMG-USB2 User manual
v.2.0
Multiple input connectors: MULTIPLE IN 1÷3
Each of the multiple input connectors provide the input to 64 amplification channels. For sEMG it is
available one adapter for the connection of a 64 electrode matrix.
PATIENT REF connector
PATIENT REF
The
connector is used to connects the EMG-USB2 reference point of the amplifier to
the patient. The reference point must be connected to a point on the patient's body without
myoelectric activity (e.g. the ankle or the wrist) using the supplied ground strip. The strip must be
wet with water to ensure a good electric contact with the patient.
REMARK: failure in connecting this electrode prevents the correct acquisition of the EMG signal.
DRL IN connector
DRL IN
The
has a double function, it is the input of the interference reduction circuitry DRL and
floating monopolar
one input of each EMG-USB2 amplification chain, when in
mode.
In case of high levels of electromagnetic interference, it may be necessary to activate the DRL
noise reduction circuitry. To activate the DRL noise reduction circuitry a ground strip must be
connected to the patient at a point with no bioelectrical activity (wrist or ankle). Using the
DRL IN
provided cable, the strip must be connected to the
connector. An additional ground strip
must be connected at a point with no bioelectrical activity on the patient and, using the provided
DRL OUT
cable, to the
connector.
floating monopolar
When using the
detection mode (Mode: Float. Monop.) the DRL IN is also
one of the two inputs of all EMG-USB2 first stages. Thus, when the amplifier is in this mode, it is
mandatory to connect the patient to this input. A ground strip must be wet with water to ensure a
good electric contact with the patient and has to be connected to a point on the patient's body
without bioelectrical activity (e.g. the ankle or the wrist) and, using the provided cable, to the DRL
IN connector.
It is very important that the two strips connected to PATIENT REF and DRL IN connectors input do
not touch each other.
REMARK: failure in connecting this electrode prevents the correct acquisition of the EMG signal in
floating monopolar mode (
MODE: Float. Monop.
).
pag. 13/31
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