GE MDS DS TRM220SB User Manual
TRM SB OEM Series
216–235 MHz Data Transceivers
MDS 05-4121A03, Rev. A
MAY 2012
Integration Guide
TABLE OF CONTENTS
1.0 INTRODUCTION ......................................................................... 7
1.1 Modem Speed versus Channel Bandwidth ......................................8
1.2 Frequency Coverage ........................................................................ 8
1.3 Radio Operating Modes ................................................................... 8
Single Frequency (Simplex) Operation ............................................... 8
Switched-Carrier Operation (Half-Duplex)..........................................8
Receive Only Operation......................................................................9
1.4 Applications ...................................................................................... 9
Point-to-Multipoint, Multiple Address Systems (MAS) ........................ 9
Point-to-Point System .......................................................................10
1.5 Model Number Codes .................................................................... 11
2.0 INSTALLATION DESIGN ........................................................... 12
2.1 Mounting the Transceiver ...............................................................13
2.2 Interface Requirements .................................................................. 13
2.3 Antennas and Feedlines ................................................................14
Antennas ..........................................................................................14
Feedlines .......................................................................................... 15
2.4 Primary Power (3.6 Vdc) ................................................................15
DC Supply Connection .....................................................................15
Shutdown Mode (Energy Conservation)........................................... 16
2.5 Data Interface Connections ............................................................16
3.0 TRANSCEIVER CONFIGURATION AND DIAGNOSTIC
COMMANDS ..................................................................................... 19
3.1 Error Messages .............................................................................. 21
3.2 Initial Installation—Radio and Data Configuration ..........................22
4.0 TROUBLESHOOTING ............................................................... 23
5.0 TECHNICAL REFERENCE ....................................................... 24
5.1 Transceiver Specifications .............................................................. 24
5.2 Test and Evaluation Assembly ....................................................... 25
5.3 Vendors for Connectors .................................................................. 28
5.4 dBm-Watts-Volts Conversion Chart ................................................ 29
6.0 GLOSSARY OF TERMS............................................................ 30
MDS 05-4121A03, Rev. A TRM SB Integration Guide i
e
RF Exposure
Separation distance
RF exposure complianc
required for
Copyright Notice
This Installation and Operation Guide and all software described herein
are protected by
GE MDS reserves its right to correct any errors and omissions in this
publication.
copyright: 2012 GE MDS . All rights reserved.
Antenna Installation Warning
1. All antenna installation and servicing is to be performed by
qualified technical personnel only. When servicing the antenna, or
working at distances closer than those listed below,
transmitter has been disabled.
2. The radio equipment described in this guide emits radio frequency
energy. Although the power level is low, the concentrated energy
from a directional antenna may pose a health hazard. Do not allow
people to come closer than 1.4 meters to the front of the antenna
when the transmitter is operating with a 11.85 dBd (14 dBi) gain
antenna. Use of higher gain antennas means increasing the distance
accordingly. This guide is intended for use by a professional
installer.
ensure the
L'équipement radio décrite dans ce guide émet de l'énergie de
fréquence radio. Bien que le niveau de puissance est faible, l'énergie
concentrée à partir d'une antenne directionnelle peut poser un
danger pour la santé. Ne pas permettre aux gens de se rapprocher de
1.4 mètres à l'avant de l'antenne lorsque l'émetteur est oper-tionnement avec un dBd 11.85 (14 dBi) gain d'antenne. L'utilisation
d'antennes à gain plus élevé signifie qu'il faut augmenter la distance
en conséquence. Ce guide est destiné à être utilisé par un installateur
professionnel.
ISO 9001 Registration
GE MDS adheres to this internationally accepted quality system standard.
ii TRM SB Integration Guide MDS 05-4121A03, Rev. A
Quality Policy Statement
We, the employees of GE MDS, are committed to understanding and
exceeding our customer’s needs and expectations.
• We appreciate our customer’s patronage. They are our business.
• We promise to serve them and anticipate their needs.
• We are committed to providing solutions that are cost effective,
innovative and reliable, with consistently high levels of quality.
• We are committed to the continuous improvement of all of our
systems and processes, to improve product quality and increase
customer satisfaction.
ESD Notice
To prevent malfunction or damage to this product, which may be caused
by Electrostatic Discharge (ESD), the radio should be properly
grounded at the time of installation. In addition, the installer or maintainer should follow proper ESD precautions, such as touching a bare
metal object to dissipate body charge, prior to touching components or
connecting/disconnecting cables.
Manual Revision and Accuracy
While every reasonable effort has been made to ensure the accuracy of
this manual, product improvements may result in minor differences
between the manual and the product shipped to you. If you have additional questions or need an exact specification for a product, please contact our Customer Service Team using the information at the back of this
guide. In addition, manual updates can often be found online at
www.gemds.com.
FCC Part 15 Notice
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference
MDS 05-4121A03, Rev. A TRM SB Integration Guide iii
will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
and correct the interference by one or more of the following measures:
• Reorient or locate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
This Class B digital apparatus complies with Canadian ICES-003. Cet
appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.
Operation is subject to the following two conditions: (1) this device may
not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
iv TRM SB Integration Guide MDS 05-4121A03, Rev. A
1.0 INTRODUCTION
This guide presents installation and operating instructions for the
TRM SB digital radio transceiver. The radio is a compact, modular
board well suited to user-designed customer integration with remote
terminal units (RTUs), programmable logic controllers (PLCs),
automatic banking machines, or similar equipment.
The transceiver (Figure 1) is a data telemetry radio designed to operate
in a point-to-multipoint environment, such as electric utility
Supervisory Control and Data Acquisition (SCADA) and distribution
automation, gas field automation, water and wastewater SCADA, and
on-line transaction processing applications. The radio employs
microprocessor control to provide highly reliable communications, even
under adverse conditions.
TRM SB radios use Gaussian-mean shift keying (GMSK) modulation.
Invisible place holder
Figure 1. TRM SB Data Transceiver
MDS 05-4121A03, Rev. A TRM SB Integration Guide 1
1.1 Modem Speed versus Channel Bandwidth
The transceiver may be configured by the user to one of two
arrangements dependent on the permissible values of over-the-air data
baud rate (
The valid configurations are:
), Gaussian filtering (
BAUD
Table 1. Permissible Data Configurations
Receive
Baud (bps)
19200 25.0 kHz .3
9600 25.0 kHz .5
Bandwidth
(BW) BT
), and channel bandwidth (
BT
BW
).
The current configuration will be displayed by the
MODEM
command.
These parameters are independent of any other user-controllable
operating parameter.
1.2 Frequency Coverage
The radio is available for operation between 216.025 and 235.000 MHz.
Any combination of transmit and receive frequencies can be
programmed within this range, including a simplex (TX = RX) pair. It
is suggested not to operate the system exactly at 232.000 MHz due to the
reference clock effects on the receiver. While the unit is completely
functional even in this region, it is suggested not to use the unit at
232.000 MHz +/- 25 kHz to ensure maximum receiver sensitivity.
1.3 Radio Operating Modes
Single Frequency (Simplex) Operation
Single frequency operation (also known as simplex) is a special case of
switched carrier operation. Single frequency operation is
selected whenever the transmit and receive frequencies are set to the
same value.
automatically
Switched-Carrier Operation (Half-Duplex)
Switched-carrier operation is a half-duplex mode where the master
station transmitter is keyed to send data and unkeyed to receive. The
transceiver operates in switched-carrier mode and is keyed when data is
present.
NOTE:
The transceiver does not support full-duplex operation (i.e.,
transmitting and receiving at the same time). For information
on other products that provide this capability, contact your
sales representative.
2 TRM SB Integration Guide MDS 05-4121A03, Rev. A
Receive Only Operation
The transceiver is available as a receive-only module. The operation is
identical to the tranceiver model, except that the transmit functions are
disabled.
1.4 Applications
Point-to-Multipoint, Multiple Address Systems (MAS)
Point-to-multipoint (MAS) is the most common application of the
transceiver. It consists of a central master station and several associated
remote units as shown in Figure 2. An MAS network provides
communications between a central host computer and remote terminal
units (RTUs) or other data collection devices. The operation of the radio
system is “transparent” to the computer equipment. That is, the radio
system transports the data in its original form, making no changes to the
data format.
Often, the radio system is used to replace a network of remote monitors
currently linked to a central location by leased telephone lines. At the
central office of such a system, there is usually a large mainframe
computer and some means of switching between individual lines
coming from each remote monitor. In this type of system, there is a
modulator/demodulator (modem) at the main computer and at each
remote site, usually built into the remote monitor itself. Since the cost of
leasing a dedicated-pair telephone line is quite high, radio is frequently
used as an alternative communication medium.
MDS 05-4121A03, Rev. A TRM SB Integration Guide 3
Invisible place holder
radio
REMOTE
radio
REMOTE
COMPUTER
HOST
radio
MASTER
STATION
RTU
RTU
Figure 2. MAS Point-to-Multipoint Network
(Two remote stations shown—four or more are typically used)
Point-to-Point System
Where permitted, the transceiver may also be used in a point-to-point
arrangement.
A point-to-point system consists of just two radios—one
serving as a master and the other as a remote—as shown in Figure 3. It
provides a simplex or half-duplex communications link for the transfer
of data between two locations.
Invisible place holder
radio
COMPUTER
HOST
RTU
MASTER
STATION
Figure 3. Typical Point-to-Point Link
4 TRM SB Integration Guide MDS 05-4121A03, Rev. A
radio
REMOTE
1.5 Model Number Codes
The radio model number is printed on the PC board or on the radio
enclosure, and provides key information about how the radio was
configured when was shipped from the factory. Contact GE MDS
Technical Services if you have questions about the model number
codes.
MDS 05-4121A03, Rev. A TRM SB Integration Guide 5
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