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The GPS-102 and GPS-112 are 12-Channel
PC/104-16 GPS Receiver Expansion Modules with two on-board
16C550 based programmable RS-232 Serial Ports that work
from +5V only.
Based on the Industry Standard
Conexant "Jupiter" GPS 12-Channel GPS Module and
the industry norm 16C550 Serial Channel architecture, the
GPS-102 and GPS-112 are a Stack-Through, 16-bit, PC/104
Boards featuring a complete, stand-alone 12-channel GPS
Receiver Module attached to one of the two on-board independent
high-speed Serial Ports.
This unit works from +5V only. Featuring the
Conexant "JUPITER" GPS Receiver Module and two
16C550 based serial ports, these GPS Receiver Modules can
be used in two different modes of operation:
- Single-channel, GPS Receiver-only with
an extra, free RS-232 Serial Port, or
- Dual-channel, Differentially Corrected
Precision GPS Reporting System
With the 16C550's 16-byte FIFOs, each Serial
Port is individually programmable for use at any serial
speed between 75bps and 115,200bps. The Conexant "JUPITER"
GPS Receiver operates at the NMEA standard 4800 bps speed
(8,N,1) or with the Conexant Proprietary Protocol at 9600
bps (8,N,1).
Operating from +5V only, the GPS-102 and GPS-112
are both fully capable of operating in all modes supported
by the 16C550. Each Channel can be set to generate an Interrupt
selectable by individual Jumpers from any available interrupt
in the system. Each channel takes only 8 consecutive I/O
Address spaces and the base address of each can be located
on any "0" or "8" boundary within the
total I/O Address Space between 0000H and 07F8H (the I/O
addresses shown in hexadecimal notation):
IO Address Space:
0000H to 0007H up to and including 07F8H (to 07FFH)
Interrupts:
IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15
The I/O Address Space for each port is set
by an on-board 8-position switch according to the Address
List attached hereto. The Interrupt is selected individually
for each Port by on-board Jumpers.
The default Factory Settings for the two Ports
are:
Port 2: I/O Address: 02E8H (corresponds
to the I/O Address of COM4)
Interrupt: IRQ 5
Port 1: I/O Address:
03E8H (corresponds to the I/O Address of COM3)
Interrupt: IRQ 15
Serial Connectors
When used in the Single-Channel, non-corrected
mode (default), the extra, free Serial Port can be used
as normal, via either the on-board DB-9, Male connector,
or via the on-board 2*5 pin Header, for extended cabling.
Note that, as these two connectors are connected "in
parallel", and that only one of these should be used
for the Extra Port. Note also that pin number 10 in the
header is connected to +5V, allowing limited power supply
of off-board units like, for instance the TS-110 Serial
touch Screen Controller, through the 10-wire ribbon cable.
Note also that this pin is not available when using the
DB-9 Male serial connector.
Software
There are no special drivers needed for the serial
ports, as these are based on the architecture of the Industry
Standard Serial Input-Output chip - the 16C550. Any serial
port driver developed for use with the standard serial ports
in the PC will work with these ports, and, as an example,
the drivers that come with all versions of Windows will
work optimally with these ports. The interrupt outputs are
high impedance when not active, allowing full sharing of
any attached interrupt. Note that this will require a software
driver written to allow for such sharing of interrupts.
The GPS Receiver will work with any software
requiring the use of the Industry Standard NMEA Protocol,
or the Proprietary Conexant Protocol.
The Conexant Jupiter 12-channel GPS
Receiver
- One of the smallest, most compact GPS Receivers
– 2.800” * 1.575” * 0.480” (70
* 40 * 12mm)
- Twelve parallel satellite tracking channels
- Supports true NMEA-0183 data protocol
- Direct, differential RTCM SC-104 data capability
dramatically improves position accuracy. Available in
both Conexant Binary and NMEA host modes
- Static navigation enhancements to minimize
wander due to Selective Ability (SA)
- Compatible with passive antennas for lowest
system cost, or with active antennas for highest degree
of installation flexibility
- Enhanced algorithms provide superior navigation
performance in “urban canyon” and foliage
environments
- Adaptive threshold-based signal detection
for improved reception of weak signals
- Maximum navigation accuracy achievable
with the Standard positioning Service (SPS)
- Enhanced TTFF upon power-up when in a “keep-Alive”
power condition before start-up
- Meets rigid shock and vibration requirements
including low-frequency vibration
- Automatic Altitude Hold Mode from Three-Dimensional
to Two-Dimensional navigation
- Automatic cold-start acquisition process
(when no initialization data is entered by the user)
- Maximum operational flexibility and configurability
via user commands over the host serial port
- Ability to accept externally supplied initialization
data
- Three-Satellite Navigation startup from
acquisition
- User selectable satellites
- User selectable visible satellite mask
angle
- Standard micro-miniature coaxial RF jack
receptacle
- Standard 2*10 pin field I/O connector
- 5 Volt operation
- Operation over an extended temperature
range (-40 to +85 centigrades)
- Relative Humidity up to 95% non-condensing,
or a wet-bulb temperature of +35 centigrades, whichever
is less
- Altitude: -1000 feet to 60,000 feet.
- Maximum vehicle dynamic: 500 m/sec (acquisition
and navigation)
- Vibration: Survival: 18G peak, 5 msec duration
- Shock: Shipping (in container): 10 drops
from 75 cm onto a concrete floor
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