Diagrams - Noraxon TeleMyo 2400T V2 User Manual

Noraxon U.S.A., Inc.

Diagrams

A block diagram of the TeleMyo 2400T transmitter and associated block descriptions are provided in the
following pages.
Analog Inputs
(x4)
Analog Inputs
(x4)
TeleMyo 2400 Transmitter Block Diagram
TeleMyo 2400T Transmitter Block Diagram Descriptions
1. Low pass filter with selectable bandpass of 500 or 1000 Hz. One filter per analog input.
2. Switched capacitor filter control oscillator operating at 50x the bandpass frequency (i.e.
25 KHz or 50 KHz) selectable under program control.
3. Selectable gain control block providing gains of x1, x2, x4, or x 10. The nominal EMG
preamplifier gain is 500. This allows EMG gains of 500, 1000, 2000 or 5000.
4. Four channel 12 bit successive approximation analog to digital converter. Sampling
frequencies of 1500 or 3000 sample/second/channel.
5. Logic level input signal to synchronize data collection when more than 8 data channels
are being acquired, that is, when two or more transmitters are active simultaneously.
One transmitter serves as the master and does not utilize the synch input. Additional
transmitters function as slaves. The master transmitter synch out signal is daisy
chained to the synch in of the first slave transmitter. Sampling begins only when synch
in is active.
6. Logic level synchronizing output which serves as the synchronizing input to the next
slave transmitter in the daisy chain.
P-2308TV2 Rev G (06-06-11)
1 3
Low Pass Filter
Gain Control
8th Order
x1, x2, x4, x10
500/1000 Hz
2
Filter
Osc
1 3
Low Pass Filter
Gain Control
8th Order
x1, x2, x4, x10
500/1000 Hz
Noraxon USA
(P-23012T)
5
Synch In
4
8
A/D
Converter 32K x 8
RAM Buffer
(12 bit)
7
Scenix
Microcontroller
Network
ID
4
(jumper selection)
A/D
Converter
(12 bit) Battery Pack
(4 to 6 VDC)
1
1
6
Synch Out
TeleMyo 2400T V2
Antenna
1
0
Xircom
2.4 GHz
SS Radio Module
Transmitter
9
ID
NiMH
4 cell Battery Charger
Circuitry
1
2
External
DC Power Source
46