MTX
‐
3G
‐
JAVA
Family
www.mtx
‐
terminals.com
www.mtxm2m.com
2015/10
v1.6
Page
70
/
109
MTX
M2M®
by
MATRIX
ELECTRONICA
S.L.U
4.12
GPS
The
MTX
‐
3G
‐
JAVA
has
an
internal
GPS
receiver
which
offers
the
full
performance
of
GPS
technology.
The
GPS
receiver
continuously
tracks
all
satellites
in
view,
thus
providing
accurate
satellite
positioning
data.
4.12.1
GPS
antenna
connector
The
antenna
connector
allows
for
the
transmission
of
radio
frequency
(RF)
signals
between
the
modem
and
an
external
customer
‐
supplied
antenna.
The
modem
is
fitted
with
a
50
Ω
,
SMA
F
coaxial
jack.
It
is
possible
to
connect
active
or
passive
GPS
antennas.
In
either
case
they
must
have
50
Ohm
impedance.
4.12.2
GPS
application
interface
The
MTX
‐
3G
‐
JAVA
has
an
internal
GPS
receiver
which
offers
the
full
performance
of
GPS
technology.
The
GPS
receiver
continuously
tracks
all
satellites
in
view,
thus
providing
accurate
satellite
positioning
data.
The
GPS
receiver
supports
implemented
NMEA
protocols.
It
is
able
to
recognize
input
messages
from
any
of
these
protocols
(e.g.,
GGA,
RMC
GSA,
GSV)
and
respond
to
them
accordingly.
Input
messages
can
be
arbitrarily
mixed.
The
NMEA
protocol
is
an
industry
standard
protocol
developed
for
marine
electronics.
It
was
originally
designed
to
allow
data
exchange
between
various
sensors
and
navigation
equipment
aboard
ships.
Nowadays,
it
is
a
de
‐
facto
standard
for
GPS
receiver
data
output.
For
more
information
on
the
NMEA
Standard
please
refer
to
www.nmea.org
.
Venus8
offer
special
proprietary
NMEA
protocol
for
special
features
like
AGPS
or
GPS
antenna
status:
(connected/unconnected)
The
GPS
receiver
can
be
software
controlled
using
NMEA
protocol.
We
recommend
the
use
of
Java
code
to
read
NMEA
sentences.
