Rockwell ZODIAC Setup guide

Development Kit Setup and Operation
Guide For The “Jupiter” GPS Receiver
Order No. GPS-29
Revision 2
June 1996

Information furnished by Rockwell International Corporation is believed to
be accurate and reliable. However, no responsibility is assumed by Rockwell
for its use, nor any infringement of patents or other rights of third parties
which may result from its use. No license is granted by implication or other-
wise under any patent rights of Rockwell other than for circuitry embodied
in Rockwell products. Rockwell reserves the right to change circuitry at any
time without notice. This document is subject to change without notice.
Zodiac is a trademark of Rockwell International Corporation.
IBM PC is a registered trademark of International Business Machines, Inc.
Notice

Section 1
Introduction ......................................................................1
Section 2
Equipment Supplied.........................................................3
Equipment Needed...........................................................3
Section 3
Description........................................................................5
Section 4
Configuring The Development Kit ..................................9
Appendix A
Acronym and Abbreviation List .....................................19
Development Kit Setup and Operation
i
Table of
Contents

Development Kit Setup and Operation
This page intentionally left blank
ii

The Rockwell ZodiacTM Development Kit is designed to
facilitate evaluation of Rockwell’s “Jupiter” Global
Positioning System (GPS) receiver engine based on the
Zodiac chip set. The receiver can be used in both static
and mobile operations for evaluation purposes.
The Development Kit implements the receiver control
operation and input/output (I/O) functions of the GPS
receiver using an IBM-AT compatible personal computer
(PC), a serial port, external antenna, and power supply.
The GPS receiver is contained in a housing with I/O
connectors, status LEDs, and configuration DIP switches
as shown in Figure 1.
This document explains how to configure the
Development Kit and the receiver, and how to set up
the test equipment.
1
Introduction 1
Development Kit Setup and Operation
Figure 1. Front (top) and Rear (below) Panels of the Development Kit.
ZODIAC 
Development Kit
POWER POWER DGPS
ACTIVE NMEA ASSURED
TIME 
MARK

ANTENNA
SERIAL PORT 1 SERIAL PORT 2 1 8
DC POWER
9-16 VOLTS
+
–
CLOCK
OUT
12345678
ANTENNA
SERIAL PORT 1 SERIAL PORT 2 1 8
DC POWER
9-16 VOLTS
+
–
CLOCK
OUT
12345678

2
LABMON, the GPS monitor and controller software, is
provided with the Development Kit to communicate
with the receiver. This software runs on the PC and
allows the user to control the receiver and to display the
receiver output message data. Externally supplied Radio
Technical Commission for Maritime Services (RTCM SC-
104) data can also be logged using a second PC serial
port if desired. The LABMON software source code is
included to provide a reference for similar Original
Equipment Manufacturer (OEM) code implementations.
Details on how to use LABMON are found in a compan-
ion document, LABMON Operation Guide For The
“Jupiter” GPS Receiver. Further information about GPS
and the Zodiac family of GPS receivers is provided in
the Zodiac GPS Receiver Family Designer’s Guide.
1
Development Kit Setup and Operation

Development Kit Setup and Operation
3
The Development Kit contains the following items as
depicted in Figure 2:
1. “Jupiter” receiver, power supply, voltage regulators, and
RS-232 drivers in housing.
2. Active patch antenna with male SMA connector.
3. Two RS-232 cables with female DB-9 connectors at both
ends.
4. 120V AC, 60 Hz/12 VDC power adapter.
5. 12 VDC automotive power adapter.
6. Zodiac GPS Receiver Family Designer’s Guide.
7. LABMON Operation Guide for the “Jupiter” GPS Receiver.
8. Development Kit Setup and Operation Guide For The
“Jupiter” GPS Receiver (this document).
9. Zodiac LABMON software on a 3.5-inch diskette.
The following OEM supplied equipment is also
required, as a minimum, to test the “Jupiter” GPS receiv-
er:
1. IBM-AT compatible PC processor with at least one avail-
able serial port, a 3.5-inch diskette drive, at least 640 KB
RAM and DOS version 3.0 or greater.
A laptop or portable PC is highly recommended since it
allows the receiver to be easily evaluated in an outdoor
environment where GPS signals are more accessible.
2. Color monitor with VGA or EGA, or monochrome monitor
with VGA (no monochrome with EGA).
3. RTCM data source (required only if the differential capability
is being tested).
4. Cabling to connect the RTCM data source to the second
PC serial port and the receiver’s Auxiliary port for simulta-
neous RTCM SC-104 data collection and DGPS operation.
A ribbon cable with three connectors is recommended.
2
Equipment
Supplied
Equipment
Needed

2
Development Kit Setup and Operation
4
Zodiac GPS Receiver Family
Designer's Guide LABMON Operation Guide
LABMON
Software
(1)
(3)
(2)
(6) (7)
Development Kit Setup and
Operation Guide
(8)
(9)
(5)
(4)
ANTENNA
SERIAL PORT 1 SERIAL PORT 2 1 8
DC POWER
9-16 VOLTS
+
–
AUXILARY
I/O
12345678
Figure 2. Development Kit Components

Development Kit Setup and Operation
5
The Development Kit features dual RS-232 level serial
data I/O ports, selectable bias voltages for active GPS
antennas, port configurations, message protocols, and
flexible internal “Keep-Alive” back-up power modes for
both the Static Random-Access Memory (SRAM) and the
low power time source.
The kit also includes the necessary circuitry to convert
the receiver’s Complimentary Metal Oxide
Semiconductor (CMOS) level output to RS-232 level,
serial data I/O. The two serial data ports are RS-232, 9-
pin D-Subminiature connectors. The first, or “host” seri-
al port, is used to send and receive both binary and
National Marine Electronics Association (NMEA-0183)
initialization and configuration data messages. The sec-
ond, or “auxiliary,” I/O port is dedicated to the recep-
tion of RTCM SC-104 Differential GPS (DGPS) correction
messages. No data is output from the receiver through
the auxiliary port.
An auxiliary output connector on the Development Kit
allows the OEM processor to access the 1 pulse-per-
second (1 PPS) time mark and 10 KHz time mark
signals. The signals available at the auxiliary test
connector are buffered CMOS level outputs driven by a
74LS04 CMOS inverting buffer device.
A number of test pins on the Development Kit board
provide access to I/O signal lines. These test pins are
located before the RS-232 drivers and timing reference
signal buffers to allow examination of these signals at
CMOS levels.
Description
3

Development Kit Setup and Operation
6
The kit also includes the necessary circuitry to regulate
the DC power input and to provide the necessary
supply voltages to the receiver.
The Development Kit board contains jumper blocks
which allow the OEM to insert a current measuring
device inline with the primary and Real-Time Clock
(RTC) power lines to the receiver to monitor power
usage under various conditions. To isolate the receiver
from the Development Kit, an electronic bus switch is
used. This switch is controlled externally by a DIP
switch on the kit. The bus switch also provides control
over the bus voltage level. A jumper block is provided
to select the interface voltage level to be used.
DC power for the Development Kit is provided by either
an AC/DC converter or automobile adapter. The AC/DC
converter operates from a nominal 120 VAC @ 60 Hz
input and provides a 12 VDC @ 500 mA out. For mobile
operation, an automotive adapter intended for use in
12V vehicles is provided. Four front panel LEDs provide
the Development Kit’s basic status indicators. A
momentary pushbutton switch is provided on the
Development Kit board to generate a master reset signal
to the receiver.
Ribbon cables are provided to interface between the
Development Kit and the customer’s PC, and between
the Development Kit and a DGPS receiver. These cables
are terminated at both ends with female connectors to
match the male connectors on the Development Kit and
the PC.
A magnetic mount, active antenna is supplied with the
kit. An 8-foot long RF cable (RG-316) is provided for the
antenna with the proper connector already terminated.
The nominal measured attenuation of the cable with
3