IP Mobilenet IPM800 Mobile Radio User Manual GPS Application Note

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Document ID	369534
Application ID	H4Rw9JS8XWTgISDs7vZKZQ==
Document Description	GPS Application Note
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	13.7kB (171293 bits)
Date Submitted	2003-10-29 00:00:00
Date Available	2003-10-29 00:00:00
Creation Date	2001-01-03 10:09:07
Producing Software	Acrobat Distiller 4.0 for Macintosh
Document Lastmod	2001-01-03 10:09:09
Document Title	GPS Application Note

Lassen LP GPS
Low power module for portable applications
Key Features
and Benefits
• 3.3 V for battery
powered applications
• Programmable power
management
Trimble
• Sized for portable
devices
Trimble’s new Lassen™ LP GPS
is a low power miniature GPS
receiver module that is ideal for
power-conscious portable applications. It is intended specifically
for system designers and integrators who are developing the next
generation of portable devices.
This embedded technology gives
the system developer the
programming flexibility to
achieve a significant reduction
in power consumption.
Power management
The Lassen LP GPS features a
new set of power management
tools that puts the power budget
decision in the developer’s hands.
The developer now can determine the best balance between
operational frequency and power
conservation for a particular
application.
In Schedule Track™ operating mode, the developer can
program the unit to power up,
quickly acquire satellites and output position to a schedule. After
gathering satellite data and computing its location, the receiver
may be directed to power down
to a minimal mode of operation
for a programmed interval or
until awakened by a hardware
interruption. Schedule Track
provides hot start performance
at a programmed interval or in
response to a hardware event.
Schedule Track mode provides
Actual size
an advantage over normal
battery-backed fast start
modes with automatic wakeup
to maintain current satellite
data for fastest possible
acquisition. Schedule Track
offers the lowest power
consumption in a deep sleep
mode but provides position
data as quickly as possible
when needed.
Ease of integration
Lassen LP GPS provides a choice
of data protocols for maximum
flexibility. The TSIP binary data
protocol incorporates new power
management features and
provides maximum control over
system operation. The TAIP and
NMEA protocols are available
where ASCII data is preferred.
A secondary serial input port is
available for RTCM SC-104
differential correction data for
high accuracy applications.
The Lassen LP GPS also
incorporates Trimble’s antenna
detection and protection circuit
to monitor the condition of the
antenna system. And a new high
performance, miniature 3.3 V
antenna is available for the
Lassen LP GPS.
Getting started
The Starter Kit makes it easy to
evaluate the Lassen LP GPS and
begin development.
Lassen LP GPS
Low power module for portable applications
General
Update rate
Accuracy
Position
Velocity
Time
DGPS accuracy
Position
Velocity
Acquisition (typical)
PHYSICAL CHARACTERISTICS
L1 frequency, C/A code (SPS), 8-channel,
continuous tracking receiver, 32 correlators
TSIP @ 1 Hz
NMEA @ 1 Hz
TAIP @ 1 Hz
Weight
Connectors
25 m CEP (50%) w/o SA
0.1 m/sec without SA
±95 nano-seconds (over-determined clock mode)
2 m CEP (50%)
0.05 m/sec
Cold start*:
< 130 seconds (90%)
Warm start**:
< 45 seconds (90%)
Hot start***:
< 20 seconds (90%)
Reacquisition after signal loss < 2 seconds (90%)
Dynamics
Acceleration
Motional Jerk
Operational limits
Operating humidity
Altitude
ACCESSORIES
Compact, 3.3 V active micropatch
antenna with 5-meter cable and magnetic mount.
1.65″ × 1.99″ × 0.55″ high
(42 mm × 50.5 mm × 13.8 mm)
GPS antenna
ORDERING INFORMATION
Module
Lassen LP GPS Module, Extended Temperature, TSIP (binary) protocol,
NMEA 0183 (ASCII) protocol and TAIP (ASCII) protocol, DGPS ready
4 g (39.2 m/sec2)
20 m/sec3
Altitude <18,000 m or velocity < 515 m/sec
either limit may be exceeded but not both
Antennas
3.3 V antenna, 5-meter cable with MCX connector
Starter Kit
Includes Lassen LP GPS module mounted on interface motherboard in a
durable metal enclosure with dual DB9, RS232 interface, AC/DC power
converter, magnetic-mount 3 V antenna, TSIP, NMEA and TAIP protocols,
software toolkit for TSIP, interface cable and manual.
ENVIRONMENTAL SPECIFICATIONS
Operating temp
Storage temp
Vibration
2.605″ L × 1.250″ W × 0.475″ H
(66.167 mm × 31.750 mm × 12 mm)
0.4 oz. (12.5 grams)
RF:
right angle MCX
Power, I/O:
8-pin (2 × 4), 2 mm header
Dimensions
– 40°C to +85°C (standard)
–55°C to +100°C
0.008 g2/Hz
5 Hz to 20 Hz
20 Hz to 100 Hz
0.05 g2/Hz
–3 dB/octave
100 Hz to 900 Hz
5% to 95% R.H. non-condensing, +60°C
– 400 m to +18,000 m
Manual
Lassen LP GPS Module System Designer Reference Guide
TECHNICAL SPECIFICATIONS
Prime power
Power consumption
Normal operation
Deep sleep
Backup power
Serial ports/1PPS
I/O Protocols
NMEA messages
Antenna power
+3.3 V DC, ± 0.3 V
GPS board only: 55 mA, 0.182 W
with antenna:
67 mA, 0.221 W
8 mA, board only
+3.0 to +3.6 V DC
2–5 µA at +25°C (nominal)
CMOS TTL levels
TSIP (binary data)
NMEA 0183 v2.1 (ASCII data)
TAIP (ASCII data)
GGA, VTG, GLL, ZDA, GSA, GSV and RMC
messages selectable by TSIP command;
selection stored in non-volatile memory.
3.3 V at 12 mA, feedline fault detect/protect
* Cold start requires no initialization
** Warm start implies last position, time and almanac are saved in battery-backed memory
*** Hot start implies ephemeris also saved.
All GPS receivers are subject to degradation of position and velocity accuracies under
Department of Defense imposed Selective Availability (SA).
Visit our website at www.trimble.com/oem
Specifications subject to change without notice.
Trimble Navigation Limited
Corporate Headquarters
645 North Mary Avenue
Sunnyvale, CA 94086
+1-408-481-8940
+1-408-481-7744 Fax
www.trimble.com
Trimble Navigation Europe Limited
Trimble House
Meridian Office Park
Osborne Way
Hook, Hampshire RG27 9HX U.K.
+44 1256-760-150
+44 1256-760-148 Fax
Trimble Navigation
Singapore PTE Limited
79 Anson Road #05-02
Singapore 079906
SINGAPORE
+65-325-5668
+65-225-9989 Fax
© Copyright 1999, Trimble Navigation Limited. All rights reserved. The Trimble logo with Trimble is a trademark of Trimble Navigation Limited registered in the United States Patent and Trademark Office.
Lassen and Schedule Track are trademarks of Trimble Navigation Limited. All other marks are the property of their respective owners. TID11547C (11/99)
PERFORMANCE SPECIFICATIONS

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