EKF CompactPCI CG2-SHANTY User manual

User Guide
CG2-SHANTY •
CompactPCI
®GPS Receiver
Document No. 3775 • Edition 4
2006-03

User Guide CG2-SHANTY • CompactPCI GPS Receiver
- 2 -
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Contents
AboutthisManual ....................................................... 3
EditionHistory..................................................... 3
Nomenclature ..................................................... 3
TradeMarks ...................................................... 3
Legal Disclaimer - Liability Exclusion ..................................... 3
CG2-SHANTYFeatures .................................................... 4
FeatureSummary .................................................. 4
ShortDescription................................................... 5
BlockDiagram..................................................... 7
TopViewComponentAssembly ....................................... 8
FrontPanel ....................................................... 9
FrontPanelElements ............................................... 10
Strapping Headers ................................................. 10
Connectors & Sockets .............................................. 10
Installation............................................................ 11
BeforeYouBegin.................................................. 11
Warnings .................................................. 11
Caution ................................................... 11
InstallingtheBoard ................................................ 12
JumperConfiguration&FactoryDefaults ................................ 13
RemovingtheBoard ............................................... 15
EMCRecommendations............................................. 16
ReplacementoftheBattery .......................................... 17
TechnicalReference ..................................................... 18
GPSReceiverModule............................................... 18
GeneralFeatures............................................. 18
SerialPorts&Protocols ........................................ 19
AuxiliaryPower.............................................. 19
Antenna Connector .......................................... 20
JupiterModuleSocket ........................................ 21
JumperJUTC,TimeMark ...................................... 22
Additional Documentation ..................................... 23
SerialInterfaces ................................................... 24
GeneralInformation .......................................... 24
Connector SP2 ......................................... 25
CompactPCI®Interface ............................................. 28
PCIDevices ................................................. 28
System Connector J1 ......................................... 29
Literature ............................................................. 31

User Guide CG2-SHANTY • CompactPCI GPS Receiver
- 3 -
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
About this Manual
This manual describes some technical aspects of the CG2-SHANTY, required for installation and
system integration. It is intended for the experienced user only.
Edition History
Ed. Contents/Changes Author Date
1 User Manual CG2-SHANTY, english, initial edition
(Text #3775, File: cg2_uge.wpd)
jb 15 September
2005
2 Added photo CG2-SHANTY
Changed URL
jb 18 January
2006
3 Changed optional jumper setting jb 2 March 2006
4 Added alternate photos CG2-SHANTY jj 14 March 2006
Nomenclature
Signal names used herein with an attached '#' designate active low lines.
Trade Marks
Some terms used herein are property of their respective owners, e.g.
Pentium, Celeron, Socket 370: ® Intel
CompactPCI : ® PICMG
Windows 98, Windows NT, Windows 2000: ® Microsoft
EKF does not claim this list to be complete.
Legal Disclaimer - Liability Exclusion
This manual has been edited as carefully as possible. We apologize for any potential mistake.
Information provided herein is designated exclusively to the proficient user (system integrator,
engineer). EKF can accept no responsibility for any potential damage caused by the use of this
manual.

User Guide CG2-SHANTY • CompactPCI GPS Receiver
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
CG2-SHANTY Features
Feature Summary
Feature Summary
Board Form Factor 3U Eurocard (100x160mm2), front panel width 20.3mm (4HP)
Serial Interfaces
SP1 (internally)
SP2 (externally and
internally)
SP3, SP4
(optional usage)
<Device: 16C550 compatible Quad PCI UART Oxford OXmPCI954
asynchronous serial protocol: 1 startbit; 7 or 8 databits; 1 or 2 stopbits;
optional even/odd parity; bitrates up to 15Mbps
<SP1/SP2: typical settings for GPS operation SP1=4800Baud (GPS NMEA-
0183), SP2=9600Baud (DGPS RTCM SC-104)
<SP2 front panel connector: PC compatible D-SUB connector 9-pin male, to
be used either as DGPS input or as universal serial COM port, ESD
protection 15kV, RS-232E transceiver can be disabled by removing jumper
J-SP2 (option)
<SP3/SP4: on-board pin headers suitable for attachment of CU7-RS485 and
CU8-RS232 PHY-modules (option)
<Serial driver software (COM port emulation) available
GPS Receiver <Exchangeable modular 12-channel receiver, chipset SiRFstarII, SMB jack for
1575,42MHz (L1 Band) GPS antenna, supply 0V (passive antenna), +5V,
+3.3V (active antenna) selectable with jumper J-ANT
<Accuracy (horizontal) better than 3m (CEP), 5m (2 dRMS)
<Acquisition performance: hot start 8s, warm start 38s, cold start 45s
<Dead Reckoning capability
<SRAM and RTC data non-volatile buffered by Lithium cell 190mAh
(>10000h)
<Selected NMEA-0183 ASCII messages: latitude, longitude, elevation,
velocity, heading, time, satellite tracking status, command/control
messages (primary serial I/F)
<SiRF binary protocol: raw data (primary serial I/F)
<RTCM ASCII protocol (secondary serial I/F)
<1pps output with better than 1us timing accuracy
CompactPCI®Bus <32-bit 33MHz (133MB/s)
<+5V/+3.3V VIO (J1 connector not keyed)
Power Consumption <+5V ±0.25V 0.1A max.
<+3.3V ±0.15V 0.15A max.
Environmental
Conditions
<Operating temperature: -40°C ... +85°C
<Storage temperature: -40°C ... +85°C
<Humidity 5% ... 95% non-condensing
<Altitude -300m ... +18000m
<Shock 15g 0.33ms, 6g 6ms
<Vibration 1g 5-2000Hz
MTBF tbd h
specifications are subject to change without further notice

User Guide CG2-SHANTY • CompactPCI GPS Receiver
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Short Description
Whenever the global time (UTC) or the
geographic position is needed in a
CompactPCI
®
based application, the GPS
receiver board CG2-SHANTY is a perfect
choice.
Often industrial computer systems need
synchronization to a precise time standard.
A solution to this problem would be any
radio controlled clock. Unfortunately, most
regions have their own local transmitter
standards. Hence, for universal use (e.g. if
systems are mobile or destined for export), a
GPS based clock is preferable.
The CG2-SHANTY 3U Eurocard is provided
with a high performance receiver engine
continuously tracking all satellites in view for
a time accuracy better than 1us and
horizontal accuracy better than 3m. The
receiver is compatible with passive or active
antennas and supports the NMEA-0183 data
protocol, thus allowing nearly any GPS
application program to be used with it.
The CG2-SHANTY module lends full GPS
functionality to any CompactPCI
®
system. If
GPS technology can solve your problem, this
board is the perfect and affordable choice.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
The CG2-SHANTY incorporates a highly
integrated digital GPS receiver, which uses
the SiRFstarII chipset and is accommodated
on a miniature daughter board as an
exchangeable mezzanine sub-assembly. The
12-channel architecture provides rapid Time-
To-First-Fix (TTFF) under all startup
conditions. The receiver decodes and
processes signals from all visible GPS
satellites, thereby producing a highly
accurate and robust navigation solution. In a
typical situation, a horizontal accuracy better
than 3m can be achieved. The external GPS
antenna connects to the front panel
mounted SMB style jack and must have
reasonable visibility of the sky. For best
performance, use an active antenna (+5V or
+3.3V selectable power), in particular for a
cable length of 3m and beyond.
Under certain conditions, differential RTCM
SC-104 data capability can further enhance
the positioning accuracy. For that, the CG2-
SHANTY is equipped with an additional serial
port for communication with an external
DGPS (Differential GPS) receiver.
With respect to the CompactPCI bus, the
CG2-SHANTY appears as a quad serial
adapter card, based on 16C550 compatible
PCI UARTs (which are also known as COM-
ports in a typical PC). The first serial port of
the CG2-SHANTY is for on-board use only. It
serves as the communications interface to
the GPS receiver. Commands and data can
be sent to and received from the GPS
daughter board according to the
NMEA-0183 standard protocol. When
operated in NMEA ASCII mode, the
moderate transmission rate of 4800bps cares
for low interrupt load of the system host. As
an option, the SiRF binary raw data protocol
allows much higher throughput.
The second serial port is intended either as
external DGPS interface (read only), or as a
general purpose RS-232E communications
channel. The wiring of the front panel
mounted 9-pin male D-SUB connector is
identical to desktop PC COM ports. When
receiving differential DGPS data at 9600bps
according to the RTCM SC-104 standard, the
GPS daughter module uses this information
for its internal calculations to sharpen the
positioning data. The second serial interface
is also directly readable by the system host.
Programs as LabMon can process DGPS data
in parallel to the GPS receiver data for
presentation.
The remaining two serial ports are currently
not in use. However, the CG2-SHANTY can
be optionally equipped with connectors
suitable for attachment of external PHY
transceiver modules (EKF CU-series, e.g. CU7-
RS485).
The CG2-SHANTY provides a pulse output
(1pps) with better than 1us timing accuracy,
which can be used to generate interrupts in
order to synchronize processes.
Available by download, the EKF utility
WinGPS displays the GPS data and allows to
synchronize the system clock with the UTC
(Universal Time Coordinated). In addition,
the Internet is full of GPS shareware tools.
The common basis of most applications is
the NMEA-0183 protocol, so that they
should be usable with the CG2-SHANTY
without any modification. Furthermore, there
are various commercial GPS application
programs available, mostly allowing
comfortable cartographical visualization.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Block Diagram
CompactPCI J1
PCI
QUAD UART
& Parallel Port
PCI 32-bit
© EKF
Block Diagram
CG2-SHANTY
ACK#/INTR#
IEEE1284
DGPS
RXD
GPS
RXD/TXD
VBATT ANT
PWR
1Hz
3V
10kHz
Jupiter
GPS Receiver
GPS
Ant
SD
J-SP2
J-UTC1
J-ANT
ADM
211
SP3 SP4
SP2
Serial
Port 1
Serial
Port 2
Serial
Port 3
Serial
Port 4
Optional
CU-Module
Connectors
Differential GPS
(Option)
RTCM SC-104
GPS NMEA
&
SIRF Binary
+5V
+3.3V
J-UTC3
INTP

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Top View Component Assembly
CompactPCI
J1
CompactPCI
J1
© EKF CG2-SHANTY
© EKF
ekf.com
J-SP2
GPS Receiver
Module
J-BAT
LED1
SP2
J-ANT
J-M1
J-UTC1
J-UTC2
J-UTC3
+5V
+3.3V
10kHz1
2
31s
SP4
SP3
1
1
BATT
SMB ANT

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Front Panel
CG2-
SHANTY
GPS ANT
D
G
P
S
S
P
2
R
X
T
XR
X
U
T
C
GPS
DGPS

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Front Panel Elements
ANT RF input 1575,42MHz (L1 band), GPS antenna active or passive,
input signal level at -130dBW ... -163dBW, SMB jack, power supply
voltages selectable 0V, +5V, +3.3V (jumper JANT), PolySwitch
resettable fuse 0.5A
SP2 RS-232E D-SUB 9 male connector, can be used either as universal
serial COM-port (standard bitrates up to max. 115,2 kBaud), or as
DGPS input (according to RTCM SC-104 protocol, 9600bps, 8bit, 1
startbit, 1 stopbit, no parity)
LED Array UTC pulse 1s period
RXD/TXD GPS receiver module
RXD serial port SP2
Strapping Headers
JANT Antenna passive, antenna active +5V, antenna active +3.3V
JBAT Lithium battery for data retention of GPS module’s RTC and SRAM
JUTC1
JUTC3
JMP_COM
TTL time mark pulse 1Hz or 10kHz connected to PCI QUAD UART
(Optional)
TTL time mark pulse 1Hz or 10kHz for synchronisation connected to
INTP (J1 D4 ) (Optional)
Transceiver for SP2 Enabled/Disabled (Optional)
Connectors & Sockets
JUTC2 TTL time mark pulse 1Hz and 10kHz, synchronized to the UTC
Universal Time (Coordinated) (Optional)

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Installation
Before You Begin
Warnings
The procedures in this chapter assume familiarity with the general terminology associated with
industrial electronics and with safety practices and regulatory compliance required for using and
modifying electronic equipment. Disconnect the system from its power
source and from any telecommunication links, networks or modems before
performing any of the procedures described in this chapter. Failure to
disconnect power, or telecommunication links before you open the system or
perform any procedures can result in personal injury or equipment damage.
Some parts of the system can continue to operate even though the power switch is in its off
state.
Caution
Electrostatic discharge (ESD) can damage components. Perform the procedures described in this
chapter only at an ESD workstation. If such a station is not available, you can
provide some ESD protection by wearing an antistatic wrist strap and attaching it
to a metal part of the system chassis or board front panel. Store the board only
in its original ESD protected packaging. Retain the original packaging (antistatic
bag and antistatic box) in case of returning the board to EKF for rapair.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Installing the Board
Warning
This procedure should be done only by qualified technical personnel. Disconnect the system
from its power source before doing the procedures described here. Failure to disconnect power,
or telecommunication links before you open the system or perform any procedures can result in
personal injury or equipment damage.
Typically you will perform the following steps:
CSwitch off the system, remove the AC power cord
CAttach your antistatic wrist strap to a metallic part of the system
CRemove the board packaging, be sure to touch the board only at the front panel
CConfigure any jumpers on the board according to your application (see next page
‘Jumper Configuration’)
CIdentify the related CompactPCI slot (peripheral slot for I/O boards)
CInsert card carefully (be sure not to damage components mounted on the bottom side of
the board by scratching neighboured front panels)
CA card with on board connectors requires attachment of associated cabling now
CLock the ejector lever, fix screws at the front panel (top/bottom)
CRetain original packaging in case of return

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
JBAT
removed
set data retention mode
battery not connected
JANT
1 2 3
1 2 3
1 2 3
removed
set 1-2
set 2-3
passive Antenna
active Antenna +5V
active Antenna +3.3V
WARNING: unmatched JANT settings may destroy antenna
check settin
g
an
y
time before connectin
g
GPS antenna
Jumper Configuration & Factory Defaults
Before inserting the CG2-SHANTY into your CPCI enclosure, please control the settings of some
jumper fields on the board. Typically, there are two jumpers that need adjustment.
CSet the jumper JBAT. This enables the Lithium cell, which provides for saving satellite
tracking information in a buffered SRAM, and supplies the RTC, which is operating as
clock source while the system is powered down or there is no receiver signal available on
the antenna input.
CCheck the jumper JANT according to the antenna in use. If your antenna is equipped
with a cable more then 2m length, probably it has a built-in amplifier (active antenna).
If you cannot determine the type of antenna, try the passive mode first (JANT open).
Observe the front panel LED UTC, which sends a periodic signal when the receiver gets
valid GPS data (there may be some delay time). If this procedure is not successful, set the
JANT jumper to the +5V active antenna mode. Note: GPS antennas need free sky above
them (mounting outside the building required).
JBAT provides for non-volatile GPS RTC &
SRAM data (Lithium cell)
jumper removed - saves cell lifetime while
board storage (delivery status)
jumper set - data retention mode
factory default is off - check this setting if
TTFF is slow
you have to set this jumper on a new board
- EKF opens this jumper for storing and
shipping
Check your antenna type in use! If in doubt,
remove jumper (passive antenna).
If your active antenna needs a +5V power
supply set 1-2
If your active antenna needs a +3.3V power
supply set 2-3

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
JUTC1
1 2 3
1 2 3
1 2 3
removed
set 1-2
set 2-3
not connected
10kHz to UART
1Hz to UART
JUTC3
1 2 3
1 2 3
1 2
3
removed
set 1-2
set 2-3
not connected
10kHz to INTP
1Hz to INTP
JMP_COM
removed
set Transceiver enabled
Transceiver disabled
CThe CG2-SHANTY can be used to synchronize external events with the UTC (Universal
Time Coordinated). Two single row 3-pin headers (JUTC1 & JUTC3) are provided optional
to route the time signal to the UART controller or directly to the INTP pin on the
CompactPCI backplane (J1 D4).
(optional)
(optional)
COptional, one single row 2-pin header (JMP_COM) is provided to enable/disable the
onboard RS232 transceiver.
(optional)

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Removing the Board
Warning
This procedure should be done only by qualified technical personnel. Disconnect the system
from its power source before doing the procedures described here. Failure to disconnect power,
or telecommunication links before you open the system or perform any procedures can result in
personal injury or equipment damage.
Typically you will perform the following steps:
CSwitch off the system, remove the AC power cord
CAttach your antistatic wrist strap to a metallic part of the system
CIdentify the board, be sure to touch the board only at the front panel
Cunfasten both front panel screws (top/bottom), unlock the ejector lever
CRemove any onboard cabling assembly
CActivate the ejector lever
CRemove the card carefully (be sure not to damage components mounted on the bottom
side of the board by scratching neighboured front panels)
CStore board in the original packaging, do not touch any components, hold the board at
the front panel only
Warning
Do not expose the card to fire. Battery cells and other components could
explode and cause personal injury.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
EMC Recommendations
In order to comply with the CE regulations for EMC, it is mandatory to observe the following
rules:
CThe chassis or rack including other boards in use must comply entirely with CE
CClose all board slots not in use with a blind front panel
CFront panels must be fastened by built-in screws
CCover any unused front panel mounted connector with a shielding cap
CExternal communications cable assemblies must be shielded (shield connected only at
one end of the cable)
CUse ferrite beads for cabling wherever appropriate
CSome connectors may require additional isolating parts
Reccomended Accessories
Blind CPCI Front
Panels
EKF Elektronik Widths currently available
(1HP=5.08mm):
with handle 4HP/8HP
without handle
2HP/4HP/8HP/10HP/12HP
Ferrit Bead Filters ARP Datacom,
63115 Dietzenbach
Ordering No.
102 820 (cable diameter 6.5mm)
102 821 (cable diameter 10.0mm)
102 822 (cable diameter 13.0mm)
Isolating Elements ARP Datacom,
63115 Dietzenbach
Ordering No. 182 068
(Cheapernet T-connector)
Metal Shielding
Caps
Conec-Polytronic,
59557 Lippstadt
Ordering No.
CDFA 09 165 X 13129 X (DB9)
CDSFA 15 165 X 12979 X (DB15)
CDSFA 25 165 X 12989 X (DB25)

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Replacement of the Battery
When your system is turned off, a battery maintains the current time-of-day clock and the values
in the GPS receiver modules CMOS RAM current. The battery allows for nominal 4750hrs data
retention. For replacement, the old battery must be removed from its socket. Change it against
the same type only (Panasonic CR2032 3V). Observe the cell polarization - the ‘+’ mark appears
on top.
Be very careful when removing the battery from its socket. Do not damage any components or
copper traces situated under the battery holder.
Warning
Danger of explosion if the battery is incorrectly replaced. Replace only with the
same or equivalent type. Do not expose a battery to fire.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
Technical Reference
GPS Receiver Module
General Features
The CG2-SHANTY is equipped with the Navman Jupiter GPS receiver module, a 12 parallel
channel receiver engine. Each of these receivers continuously tracks all satellites in view and
provides accurate satellite positioning data. The Jupiter module size is about 28 square
centimeters and satisfies harsh industrial requirements. The Jupiter module decodes and
processes signals from all visible GPS satellites. These satellites, in various orbits around the
Earth, broadcast radio frequency (RF) ranging codes and navigation data messages. The Jupiter
receiver uses all available signals to produce a highly accurate and robust navigation solution.
The 12-channel architecture provides rapid Time-To-First-Fix (TTFF) under all startup conditions.
While the best TTFF performance is achieved when time of day and current position estimates
are provided to the receiver, the flexible SiRF signal acquisition system takes advantage of all
available information to provide a rapid TTFF. Acquisition is guaranteed under all initialization
conditions as long as visible satellites are not obscured. To minimize TTFF following a power
down, the Jupiter receiver is sourced by a Lithium Cell on the CG2-SHANTY board to maintain
power to the Static Random-Access Memory (SRAM) and Real-Time Clock (RTC) for periods
following the loss of prime power. The use of the battery voltage assures the shortest possible
TTFF following a short power down. The Jupiter receiver supports two dimensional (2-D)
operation when less than four satellites are available or when required by operating conditions.
Altitude information required for 2-D operation is determined by the receiver.
The Jupiter module contains two independent serial ports, one of which is configured for
primary input and output data flow using the National Marine Electronics Association (NMEA-
0183) format. The second port is used to receive Differential GPS (DGPS) corrections in the Radio
Technical Commission For Maritime Services (RTCM SC-104) format. The Jupiter receiver
supports DGPS operations for dramatically improved accuracies over standard GPS (while
Selective Availability is activated by US government). The primary I/O port of the Jupiter (NMEA)
is connected to the first port of the UART controller, while the secondary port (RTCM) ist
connected to both the front panel connector SP2 and the second port of the UART controller of
the CG2-SHANTY (see block diagram CG2-SHANTY).
For applications that require timing synchronization to GPS accuracies, the Jupiter receiver
provides an output timing pulse that is synchronized to one second Universal Time Coordinated
(UTC) boundaries. This timing pulse is available by an two single row headers JUTC1 and JUTC3
on the CG2-SHANTY board. This timing signal could generate a timing interrupt on the UART
controller therefore JUTC1 should be set. Its also possible to use this timing signal to generate
a timing interrupt directly on the INTP of the CompactPCI bus (J1 d4). The CompactPCI CPU
boards CC9-SAMBA and CD2-BEBOP are already capable of handling this interrupt. This timing
pulse is also used to drive an indicator LED visible from the CG2-SHANTY boards front panel.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
JBAT
removed
set data retention mode
battery not connected
Serial Ports & Protocols
The Jupiter module communicates with the host across its primary serial port. The bit rate is
fixed to 4800bps, no parity, 8 data bits, 1 stop bit. Commands are passed to the module, which
responds accordingly with results and status information. Due to the low data transfer rates,
there is no hardwired handshake available.
There are two choices for protocol selection. By default, the NMEA standard is selected on the
Jupiter Module. This is an ASCII based protocol, widely accepted as a common base to all GPS
application programs. As an alternate, the Jupiter module can be configured to communicate
by a proprietary, binary protocol (SiRF binary messages). On writing own firmware, the binary
protocol could be a more efficient solution. The binary protocol also allows for defining higher
bit rates on both serial interfaces. Please contact EKF when you need the binary protocol feature.
The secondary (auxiliary) serial port of the Jupiter module is configured as a half duplex input at
9600bps, no parity, 8 data bits, one stop bit. This interface is configured to receive RTCM DGPS
correction data messages. Usage of this port is optional.
There are four indicator LEDs mounted in the front panel to signal both RXD and TXD of the
primary serial interface, and RXD only of the auxiliary serial interface.
Auxiliary Power
The CG2-SHANTY is equipped with a Lithium cell battery. Close the jumper JBAT to provide this
auxiliary power to the Jupiter receiver module (you have to set this jumper for any new board,
because the factory default is off for saving cell lifetime while storing). Data retention for the
GPS receivers SRAM and RTC is nominal 4750hrs. Loss of SRAM or RTC data results in slower
response time (TTFF) after powering up the CG2-SHANTY, but the GPS receiver remains fully
operable. For replacement of the battery, observe precautions and follow the procedure
described in chapter ‘Replacement of the Battery’.

CG2-SHANTY • CompactPCI GPS Receiver/Clock
- 20 -
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [email protected] • Internet www.ekf.com
JANT
1 2 3
1 2 3
1 2 3
removed
set 1-2
set 2-3
passive Antenna
active Antenna +5V
active Antenna +3.3V
WARNING: unmatched JANT settings may destroy antenna
check setting anytime before connecting GPS antenna
Antenna Connector
The Jupiter receiver is equipped with a SMB type miniature coaxial female connector as RF signal
input from the antenna. The antenna cable therefore should provide a matching SMB plug.
When ordering an antenna, be sure to have selected the SMB connector version, if the antenna
cable is directly attached (there are several other common connector types on the market, e.g.
SMA, TNC and OSX). If the antenna is equipped with a built-in connector, an additional adapter
cable is required, matching both, the antenna type of connector at the outer end, and a SMB
male connector on the CG2-SHANTY side. The SMB connector should be a straight type, not
right angle style. A right angle connector might have a profile too low to allow full insertion into
the matching jack on the CG2-SHANTY, which is mounted behind the front panel, due to EMC
requirements.
For best results, use an active GPS antenna with built-in amplifier, especially when the cable
length exceeds 2m. Typical gain is 10...50db; a longer cable needs higher gain to compensate
its loss. Active antennas are powered by +3.3V or +5V across the coaxial cable, selected by the
jumper field JANT. Do not obscure the antenna (mounting outside of the building required).
Heavy Duty Airborne GPS Antenna