GM Series
Evaluation Module
User's Guide
Warning:
Linx radio frequency (“RF”) products may be used to
control machinery or devices remotely, including machinery or devices
that can cause death, bodily injuries, and/or property damage if
improperly or inadvertently triggered, particularly in industrial settings or
other applications implicating life-safety concerns. No Linx Technologies
product is intended for use in any application without redundancies
where the safety of life or property is at risk.
The customers and users of devices and machinery controlled with
RF products must understand and must use all appropriate safety
procedures in connection with the devices, including without limitation,
using appropriate safety procedures to prevent inadvertent triggering by
the user of the device and using appropriate security codes to prevent
triggering of the remote controlled machine or device by users of other
remote controllers.
All RF products are susceptible to RF interference that can prevent
communication.
Lack of good sight of the GPS satellites (open sky)
can affect the accuracy of a position fix or prevent a fix entirely.
Do not use any Linx product over the limits in this data guide.
Excessive voltage or extended operation at the maximum voltage could
cause product failure. Exceeding the reflow temperature profile could
cause product failure which is not immediately evident.
Do not make any physical or electrical modifications to any Linx
product.
This will void the warranty and regulatory and UL certifications
and may cause product failure which is not immediately evident.
!
Table of Contents
1
Introduction
2
Ordering Information
2
Electrical Specifications
3
Pin Assignments
3
PCB Layout
3
Schematic
GM Series
Evaluation Module
User's Guide
Figure 1: GM Series Evaluation Module
Introduction
The GM Series GNSS receiver module is a self-contained
high-performance Global Satellite Navigation System receiver. Based on
the MediaTek chipset, it can simultaneously acquire and track multiple
satellite constellations. These include the United States GPS system,
Europe’s GALILEO, Russia’s GLONASS and Japan’s QZSS.
The module provides exceptional sensitivity, even in dense foliage and
urban canyons. It’s very low power consumption helps maximize runtimes
in battery powered applications. Hybrid ephemeris prediction can be used
to achieve cold start times of less than 15 seconds. The module outputs
standard NMEA data.
The evaluation module contains the surface mount GM Series GNSS
module, SMA connector and a ferrite bead (used to supply power to an
external active antenna, such as the Linx SH Series active GPS antenna)
on a single board with through-hole headers. This small board makes
prototyping with the GM Series module very easy.
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Revised 9/24/13
Ordering Information
Ordering Information
Part Number
EVM-GNSS-GM
RXM-GNSS-GM
MDEV-GNSS-GM
Figure 2: Ordering Information
Description
GM Series Evaluation Module
GM Series GNSS Receiver Module
GM Series GNSS Receiver Master Development System
Pin Assignments
GND
NC
NC
TXD
RXD
1PPS
RESET
NC
NC
GND
GND
NC
NC
VCC
NC
VBACKUP
NC
NC
NC
GND
Electrical Specifications
GM Series GNSS Receiver Specifications
Parameter
Power Supply
Operating Voltage
Supply Current
Peak
Acquisition
Tracking
Standby
Backup Battery Voltage
Backup Battery Current
Antenna Port
RF Impedance
Environmental
Operating Temperature
Range
Storage Temperature
Range
1.
2.
–40
–40
+85
+85
°C
°C
R
IN
50
Ω
V
BAT
I
BAT
2.0
7
24
16
0.365
4.3
V
CC
l
CC
150
mA
mA
mA
mA
VDC
µA
2
1
1
1
1
3.0
3.3
4.3
VDC
Symbol
Min.
Typ.
Max.
Units
Notes
Figure 4: EVM-GNSS-GM Pin Assignments
PCB Layout
1.20”
(47.24)
Ø0.04” x 10
(1.02)
0.10”
(2.54)
1.10”
(27.94)
0.10”
(2.54)
0.10”
(2.54)
1.00”
(25.40)
Figure 5: EVM-GNSS-GM PCB Layout Dimensions
Schematic
1
2
J1
GND
TXD
RXD
1PPS
RESET
GND
1
2
3
4
5
6
7
8
9
10
GND
VCC
VBACKUP
J2
1
2
3
4
5
6
7
8
9
10
1PPS
TXD
RXD
GND
3
4
5
21
6
7
RESET
8
9
U1
NC
NC
1PPS
TX
RX
GND
NC
NC
RESET
NC
NC
GND
RFIN
GND
VOUT
NC
GND
NC
NC
NC
VCC
VBACKUP
20
19
18
17
16
22
15
14
13
12
11
VCC
VBACKUP
GND
L1
300ohm BEAD
GND
GND
1
ANT1
CONSMA001
RF
GND
GND
2-5
V
CC
= 3.3V, without active antenna, ephemeris prediction is off
V
CC
= 0V
Figure 3: Electrical Specifications
GND
Warning:
This product incorporates numerous static-sensitive
components. Always wear an ESD wrist strap and observe proper ESD
handling procedures when working with this device. Failure to observe
this precaution may result in module damage or failure.
10
RXM-GPS-GM
Figure 6: EVM-GNSS-GM Schematic
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Linx Technologies
159 Ort Lane
Merlin, OR, US 97532
3090 Sterling Circle, Suite 200
Boulder, CO 80301
Phone: +1 541 471 6256
Fax: +1 541 471 6251
www.linxtechnologies.com
Disclaimer
Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we
reserve the right to make changes to our products without notice. The information contained in this Data Guide
is believed to be accurate as of the time of publication. Specifications are based on representative lot samples.
Values may vary from lot-to-lot and are not guaranteed. “Typical” parameters can and do vary over lots and
application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any
product for use in any specific application. It is Customer’s responsibility to verify the suitability of the part for the
intended application. At Customer’s request, Linx Technologies may provide advice and assistance in designing
systems and remote control devices that employ Linx Technologies RF products, but responsibility for the ultimate
design and use of any such systems and devices remains entirely with Customer and/or user of the RF products.
LINX TECHNOLOGIES DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY CUSTOMER’S OR
USER’S INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THE DESIGN OR USE
OF A REMOTE CONTROL SYSTEM OR DEVICE EMPLOYING LINX TECHNOLOGIES RF PRODUCTS OR FOR ANY
OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. CUSTOMER AND/OR USER ASSUME ALL RISKS
OF DEATH, BODILY INJURIES, OR PROPERTY DAMAGE ARISING OUT OF OR RELATED TO THE USE OF LINX
TECHNOLOGIES RF PRODUCTS, INCLUDING WITH RESPECT TO ANY SERVICES PROVIDED BY LINX RELATED
TO THE USE OF LINX TECHNOLOGIES RF PRODUCTS. LINX TECHNOLOGIES SHALL NOT BE LIABLE UNDER ANY
CIRCUMSTANCES FOR A CUSTOMER’S, USER’S, OR OTHER PERSON’S DEATH, BODILY INJURY, OR PROPERTY
DAMAGE ARISING OUT OF OR RELATED TO THE DESIGN OR USE OF A REMOTE CONTROL SYSTEM OR DEVICE
EMPLOYING LINX TECHNOLOGIES RF PRODUCTS.
The limitations on Linx Technologies’ liability are applicable to any and all claims or theories of recovery asserted
by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence.
Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss,
or business interruption) for all claims, including claims from third parties, arising from the use of the Products.
Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device
in any application, other than the repair, replacement, or refund limited to the original product purchase price.
Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components,
or materials.
© 2013 Linx Technologies. All rights reserved.
The stylized Linx logo, Wireless Made Simple, CipherLinx, WiSE and the stylized CL logo are trademarks of Linx Technologies.
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