Trigno Quattro, Duo, Mini EMG Sensor User’s Guide
19
“Quattro” Orientation Measurement Data Modes
Denotes raw EMG signal acquisition.
Denotes onboard RMS calculation of the EMG signal.
Denotes onboard calculation of orientation fused from 3 DOF accelerometer, 3 DOF gyroscope and 3 DOF
magnetometer data.
Con
fig
ur
at
ion
ID
# D
ata
S
lo
ts
1
# E
M
G C
ha
nne
ls
EM
G
Sa
m
pl
in
g P
eri
od
2
(m
s)
EM
G S
am
pl
in
g Ra
te
2
(sa
/se
c)
RM
S W
in
do
w
3
(m
s)
RM
S
Sa
m
pl
in
g P
eri
od
2
(m
s)
RM
S U
pd
ate
R
ate
4
(s
a/
se
c)
EM
G B
andw
idt
h
5
(H
z)
EM
G I
nput
R
ang
e
6
(m
V)
EMG
Res
olu
tion
D
ep
th
7
(bi
ts)
Or
ie
nt
at
ion
S
am
pl
in
g P
eri
od
2
(m
s)
Ori
en
ta
tio
n S
am
pl
in
g Ra
te
2
(s
a/
sec)
Or
ie
nt
at
ion
R
es
olu
tion
8
(b
its
)
9 1 4
0.5
2000 100 4.5 222 20-450
11
22
32 13.5
74
20
10 2 4
27
26
963 -- -- --
20-450
11
22
16 13.5
74
28
11 4 4
0.5
2000 -- -- --
20-450
10-850
11
22
16 13.5
74
32
1)
The Trigno System is designed with 16 data slots for wireless transmission. Sensors can occupy up to 4 slots
depending on the sampling rate settings.
2)
Sampling period is the precise time elapse between samples in milliseconds. The sampling rate is a rounded
expression of 1/”sampling period” expressed as samples/second (sa/sec).
3)
RMS window is the period of raw signal that is captured and process to produce singular RMS value.
4)
RMS update rate is the rate at which the RMS calculation is updated, expressed as samples/sec (sa/sec).
5)
Analog EMG Sensor Butterworth filter bandwidth: 2 pole high pass corner, 4 pole low pass corner in Hz.
6)
EMG signal input range of sensor in millivolts.
7)
sensor resolution depth across input range.
8)
Orientation vector output resolution in bits. Orientation is expressed in quaternions and is performed on the sensor.
