Biomechanics Gait Analysis Lab - Biomedical Engineering ...

The following table gives the dimensions for the LEMO
connector shown in Figure 46.
Metric A B e E M Nmax S1 S3
mm. 12.0 12.5 M9X0.6 2.4 2.5 18.3 8.2 11.0
in. 0.47 0.49 - 0.09 0.10 0.72 0.32 0.43
Table 4: Measurements for Figure 46A
Common (V o
)
Heal
5 th Metatarsal
Toe
1 st Metatarsal
Figure 47: Female LEMO Lead Wire Layout
Telemetry
The purpose of telemetry is to reduce the amount of wires
and allow the freedom of movement that cannot be achieved
using wires that are directly connected to a computer. The
telemetry system is comprised of a transmitter box and
receiver box. The transmitter box includes the 418MHz
transmitter/encoder chip (TXE-418-KH), 10-pin dip switch
(SDA10H1KD), and 418MHz Splatch antenna (ANT-418-SP-1),
which is shown in Figures 48-49. The box also has the
circuitry that provides the data to be sent wirelessly.
The receiver box has a 418MHz receiver/decoder chip (RXE-
418-KH), 10-pin dip switch (SDA10H1KD), and 418MHz Splatch
antenna (ANT-418-SP-1), which is shown in Figures 50-51.
The receiver/decoder chip is also wired to connect to the
BNC-2120, which will be described later in the National
Instruments equipment section. The transmitter/encoder and
receiver/decoder are powered by a 3V coin battery at pin 5
for both chips.
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