Exhibit 21 Users Manual
MDS 05-3624A01, Rev. A
JUNE 2000
Data Transceiver
MDS OEM-L/ss
QUICK START GUIDE
Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installation
Steps” on page 8 of this guide.
1. Install and connect the antenna system to the radio
• Use good quality, low loss coaxial cable. Keep the feedline as short as possible.
• Preset directional antennas in the direction of desired transmission.
2. Connect the data equipment to the radio’s INTERFACE connector
• Connection to the radio must be made with a DB-25 Male connector. Connections for typical sys-
tems are shown below.
• Connect only the required pins. Do not use a straight-through RS-232 cable with all pins wired.
• Verify the data equipment is configured as DTE. (By default, the radio is configured as DCE.)
The markup had a question about this figure. Please verify
3. Apply DC power to the radio (10–30 Vdc @ 1.5 A minimum)
• Observe proper polarity.
4. Set the radio’s basic configuration with a Hand-Held Terminal (HHT)
• Set the transmit frequency (
TX xxx.xxx
).
• Set the receive frequency (
RX xxx.xxx
).
• Set the network address (
ADDR xxx
).
• Set/verify the data rate using the
BAUD
command. The default setting is
BAUD 9600 8N1
. (Refer to
“TRANSCEIVER PROGRAMMING” on page 14 for command details.)
5. Verify proper operation by observing the LED display
• Refer to Table 5 on page 14 for a description of the status LEDs.
• Refine directional antenna headings for maximum receive signal strength using the
RSSI
command.
DB-25 DB-25
TRANSCEIVER
(DCE)
2
3
2
3
RTU
(DTE)
4
5
20
6DSR DSR
6
RXD
TXD
GND
RTS
CTS
TXD
RXD
GND
4
CTS
5
RTS
DB-9 DB-25
DB-9 to DB-25 ExampleDB-25 to DB-25 Example
11
4
5
TRANSCEIVER
(DCE)
2
3
2
3
RTU
(DTE)
5
20
7
RXD
TXD
DCD
GND
DSR
RTS
TXD
RXD
DCD
GND
As required for application
5
18
7
6
CTS
DSR
RTS
CTS8
6
4
5
77
GND GND
8 8
DCD DCD
As required for application
MDS 05-3624A01, Rev. A Installation and Operation Guide i
TABLE OF CONTENTS
1.0 GENERAL....................................................................................1
1.1 Introduction ......................................................................................1
1.2 Differences Among Models ..............................................................1
1.3 Applications ......................................................................................2
Point-to-Multipoint, Multiple Address Systems (MAS) ....................2
Point-to-Point System .....................................................................3
Switched Carrier Operation ............................................................4
Single Frequency (Simplex) Operation...........................................4
1.4 Model Number Codes ......................................................................4
1.5 Accessories ......................................................................................5
2.0 GLOSSARY OF TERMS..............................................................5
3.0 INSTALLATION ............................................................................8
3.1 Installation Steps ..............................................................................8
3.2 Mounting the Transceiver Board .......................................................9
3.3 Mounting the Enclosed Transceiver ...............................................10
3.4 Antennas and Feedlines ................................................................10
Feedlines ......................................................................................11
3.5 Power Connection ..........................................................................11
3.6 Data Interface Connections ............................................................12
3.7 Power Conservation .......................................................................12
4.0 OPERATION ..............................................................................13
4.1 LED Indicators ................................................................................14
5.0 TRANSCEIVER PROGRAMMING ............................................14
5.1 Hand-Held Terminal Connection & Startup ....................................15
5.2 Hand-Held Terminal Setup .............................................................16
5.3 Keyboard Commands .....................................................................17
Entering Commands.....................................................................17
Error Messages ............................................................................17
5.4 Detailed Command Descriptions ...................................................19
ADDR [0–255] ..............................................................................19
AMASK [0000 0000–FFFF FFFF] ................................................19
BAUD [xxxxx abc] .........................................................................20
CTS [0–255] .................................................................................20
CTSHOLD [0–60000] ...................................................................21
DEVICE [DCE | CTS KEY] ...........................................................21
DKEY............................................................................................21
INIT...............................................................................................22
KEY ..............................................................................................22
ii Installation and Operation Guide MDS 05-3624A01, Rev. A
OWM [XXX...] ...............................................................................22
OWN [XXX...]................................................................................22
PWR [L | M | H].............................................................................23
RSSI and RSSI!............................................................................23
RX [xxx.xxx]..................................................................................23
RXTOT [NONE | 1–255] ...............................................................23
SER ..............................................................................................24
SREV............................................................................................24
STAT .............................................................................................24
TOT [1–255 | ON | OFF] ...............................................................24
TX [xxx.xxx] ..................................................................................24
6.0 TROUBLESHOOTING ...............................................................25
6.1 LED Indicators ................................................................................25
6.2 Event Codes ...................................................................................25
Checking for Alarms—STAT command.........................................25
Major Alarms vs. Minor Alarms.....................................................26
Event Code Definitions .................................................................26
7.0 TECHNICAL REFERENCE .......................................................28
7.1 OEM-L/ss Transceiver Specifications .............................................28
7.2 Bench Testing Setup ......................................................................29
7.3 Helical Filter Adjustment ................................................................30
7.4 Upgrading the Radio’s Software .....................................................31
Using the Radio Software Upgrade Diskette ................................31
Using Radio Configuration Software.............................................32
7.5 dBm-Watts-Volts Conversion Chart ................................................33
MDS 05-3624A01, Rev. A Installation and Operation Guide iii
Copyright Notice
This Installation and Operation Guide and all software described herein
are protected by
copyright: ©2000 Microwave Data Systems
, a divi-
sion of Adaptive Broadband Corporation. All rights reserved.
Microwave Data Systems reserves its right to correct any errors and
omissions.
Operational Safety Notices
The radio equipment described in this guide uses radio frequency trans-
mitters. Although the power level is low, the concentrated energy from
a directional antenna may pose a health hazard. Do not allow people to
come in close proximity to the front of the antenna when the transmitter
is operating.
This manual is intended to guide a professional installer to install, oper-
ate and perform basic system maintenance on the described radio.
ISO 9001 Registration
Microwave Data Systems’ adherence to this internationally accepted
quality system standard provides one of the strongest assurances of
product and service quality available.
MDS Quality Policy Statement
We, the employees of Microwave Data Systems, are committed to
achieving total customer satisfaction in everything we do.
Total Customer Satisfaction in:
• Conception, design, manufacture and marketing of our products.
• Services and support we provide to our internal and external custom-
ers.
Total Customer Satisfaction Achieved Through:
• Processes that are well documented and minimize variations.
• Partnering with suppliers who are committed to providing quality and
service.
• Measuring our performance against customer expectations and indus-
try leaders.
• Commitment to continuous improvement and employee involvement.
RF Exposure
iv Installation and Operation Guide MDS 05-3624A01, Rev. A
Notice
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 addi-
tional 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 on the
MDS Web site at www.microwavedata.com.
MDS 05-3624A01, Rev. A Installation and Operation Guide 1
1.0 GENERAL
1.1 Introduction
This guide presents installation and operating instructions for the MDS
OEM-L/ss family of digital radio transceivers. The radios can be pur-
chased as compact, modular boards that can be completely integrated
within remote terminal units (RTUs) and PLC equipment. They are also
available packaged in their own enclosures.
These transceivers (Figure 1) are data telemetry radios 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. They use microprocessor
control technology to provide highly reliable communications, even
under adverse conditions.
MDS OEM-L/ss radios use continuous-phase frequency shift keying
(CPFSK) modulation with root raised cosine filtering with 50% excess
bandwidth. Domestic models employ a 4-level modem; ETSI models, a
2-level modem.
The transceiver is designed for trouble-free operation with data equip-
ment provided by many other manufacturers, including remote terminal
units (RTUs), programmable logic controllers (PLCs), flow computers,
lottery terminals, automatic teller machines, and others.
NOTE:
Some features may not be available on all radios, based on the
options purchased and the applicable regulations for the region
in which the radio will operate.
1.2 Differences Among Models
Since there are more
than 2 models, I have
made this section
more generic. The
specific frequency
coverages can be
listed in the specifi-
cations section.
---Van
The OEM-L/ss models are very similar in appearance and functionality.
The major differences are over-the-air modem speed and frequency cov-
erage. Domestic models are capable of 9600 bps transmission over the
air; ETSI models, 4800 bps. This does
not
affect the local
DATA INTER-
FACE
port speed, however. All models accept asynchronous data
between 1200 and 19200 bps. The frequency coverages are listed in the
specifications. See “OEM-L/ss Transceiver Specifications” on page 28.
NOTE:
The frequency coverage cannot be set or changed by the user;
it is set at the factory.
Finally, there are some hardware and software differences among the
OEM-L/ss models. The operating software is
not
interchangeable
among MDS OEM-L/ss radios.
2 Installation and Operation Guide MDS 05-3624A01, Rev. A
Where are the LEDs? I
could not see any-
thing that looked
obvious. ---Van
Invisible place holder
Figure 1. Transceiver Connectors and Indicators
1.3 Applications
Point-to-Multipoint, Multiple Address Systems (MAS)
This 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.
Often, a radio system consists of many widely separated remote radios.
A point-to-multipoint or SCADA (Supervisory Control and Data Acqui-
sition) system may be a new installation for automatic, remote moni-
toring of gas wells, water tank levels, electric power distribution system
control and measurement, etc.
The radio system may replace a network of remote monitors currently
linked to a central location via 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
phone line is quite high, radio is often used as an alternative communi-
cation medium.
LED INDICATORS (4)
EXTERNAL
INTERFACE
CONNECTOR
(DB-25) ANTENNA
CONNECTOR
(BNC)
POWER CONNECTOR
(TIP/RING BARREL TYPE)
MDS 05-3624A01, Rev. A Installation and Operation Guide 3
Invisible place holder
Figure 2. Typical MAS Point-to-Multipoint Network
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
Figure 3. Typical Point-to-Point Link
RTU
L/ss
REMOTE
L/ss
HOST
COMPUTOR
RTU
L/ss
REMOTE
L/ss
HOST
COMPUTOR
RTU
L/ss
REMOTE
4 Installation and Operation Guide MDS 05-3624A01, Rev. A
Switched Carrier Operation
NOTE:
MDS OEM-L/ss radios do not support full-duplex operation.
Switched Carrier operation is a half-duplex mode of operation where the
master station transmitter is keyed to send data and unkeyed to receive.
MDS OEM-L/ss radios operate in switched carrier mode and are keyed
on data.
Single Frequency (Simplex) Operation
Single frequency operation (also known as simplex) is a special case of
switched carrier operation. Single frequency operation is automatically
selected whenever the transmit and receive frequencies are set to the
same value.
1.4 Model Number Codes
This section/figure
needs to be updated.
---Van
The radio model number is printed on the end of the radio enclosure, and
provides key information about how the radio was configured when it
was shipped from the factory. See Figure 4 for an explanation of the
model number characters.
Invisible place holder
Figure 4. MDS OEM-L/ss Model Number Codes
THIS INFORMATION IS
SUBJECT TO
CHANGE.
DO NOT USE FOR
PRODUCT ORDERING.
2710A/D
OPERATION
X= Base/Remote
MODE
N= Non-redundant
INPUT VOLTAGE
1= 10.5 to 16 VDC
MODEM
A= 9600 BPS
DIAGNOSTICS
0= NONE
1= Non-Intrusive
BANDWIDTH
1= 12.5 kHz
2= 25 kHz
FEATURES
0= Full
AGENCY
N= N/A
SAFETY
N= N/A
MOUNTING BRACKETS
A= Standard
B= None
5= 5 kHz
D= 3200 BPS
MDS 05-3624A01, Rev. A Installation and Operation Guide 5
1.5 Accessories
The transceiver can be used with one or more of the accessories listed in
Table 1. Contact Microwave Data Systems for ordering information.
2.0 GLOSSARY OF TERMS
If you are new to digital radio systems, some of the terms used in this
guide may be unfamiliar. The following glossary explains many of these
terms and will prove helpful in understanding the operation of the trans-
ceiver.
Antenna System Gain
—A figure, normally expressed in dB, repre-
senting the power increase resulting from the use of a gain-type antenna.
System losses (from the feedline and coaxial connectors, for example)
are subtracted from this figure to calculate the total antenna system gain.
Bit
—The smallest unit of digital data, often represented by a one or a
zero. Eight bits (plus start, stop, and parity bits) usually comprise a byte.
Bits-per-second
—See
BPS
.
BPS
—Bits-per-second. A measure of the information transfer rate of
digital data across a communication channel.
Byte
—A string of digital data usually made up of eight data bits and
start, stop and parity bits.
Data Circuit-terminating Equipment
—See
DCE
.
Data Communications Equipment
—See
DCE
.
Data Terminal Equipment
—See
DTE
.
dBi
—Decibels referenced to an “ideal” isotropic radiator in free space.
Frequently used to express antenna gain.
Table 1. MDS OEM-L/ss Optional Accessories
Accessory Description MDS P/N
Hand-Held Terminal
Kit (HHT) Terminal that plugs into the radio for
programming, diagnostics & control.
Includes carrying case and cable set.
02-1501A01
RTU Simulator Test unit that simulates data from a
remote terminal unit. Comes with
polling software that runs on a PC.
Useful for testing radio operation.
03-2512A01
DB-9 to DB-25 adapter Used to connect a PC to the radio’s
DATA INTERFACE port ??-????A??
Radio Configuration
Software Provides diagnostics of the transceiver
(Windows-based PC required.) 03-3156A01
6 Installation and Operation Guide MDS 05-3624A01, Rev. A
dBm
—Decibels referenced to one milliwatt. An absolute unit used to
measure signal power, as in transmitter power output, or received signal
strength.
DCE
—Data Circuit-terminating Equipment (or Data Communications
Equipment). In data communications terminology, this is the “modem”
side of a computer-to-modem connection. The MDS OEM-L/ss is a
DCE device.
Decibel (dB)
—A measure computed from the ratio between two signal
levels. Frequently used to express the gain (or loss) of a system.
DTE
—Data Terminal Equipment. A device that provides data in the
form of digital signals at its output. Connects to the DCE device.
Equalization
—The process of reducing the effects of amplitude, fre-
quency or phase distortion with compensating networks.
Fade Margin
—The greatest tolerable reduction in average received
signal strength that will be anticipated under most conditions. Provides
an allowance for reduced signal strength due to multipath, slight antenna
movement, or changing atmospheric losses. A fade margin of 20 to
30 dB is usually sufficient in most systems.
Frame
—A segment of data that adheres to a specific data protocol and
contains definite start and end points. It provides a method of synchro-
nizing transmissions.
Hardware Flow Control
—A transceiver feature used to prevent data
buffer overruns when handling high-speed data from the RTU or PLC.
When the buffer approaches overflow, the radio drops the clear-to-send
(CTS) line, which instructs the RTU or PLC to delay further transmis-
sion until CTS again returns to the high state.
Host Computer
—The computer installed at the master station site,
which controls the collection of data from one or more remote sites.
Latency
—The delay (usually expressed in milliseconds) between when
data is applied to TXD (Pin 2) at one radio, until it appears at RXD
(Pin 3) at the other radio.
MAS
—Multiple Address System. A radio system where a central
master station communicates with several remote stations for the pur-
pose of gathering telemetry data.
Master (Station)
—Radio which is connected to the host computer. It is
the point at which polling enters the network.
Multiple Address System
—See
MAS
.
MDS 05-3624A01, Rev. A Installation and Operation Guide 7
Payload data
—This is the application’s user communication data
which is sent over the radio network. It is the transfer of payload data
that is the primary purpose of the radio communications network.
PLC
—Programmable Logic Controller. A dedicated microprocessor
configured for a specific application with discrete inputs and outputs. It
can serve as a host or as an RTU.
Point-Multipoint System
—A radio communications network or
system designed with a central control station that exchanges data with
a number of remote locations equipped with terminal equipment.
Poll
—A request for data issued from the host computer (or master PLC)
to a remote radio.
Programmable Logic Controller
—See
PLC
.
Received Signal Strength Indication—See RSSI.
Redundant Operation—A station arrangement where two transceivers
and two power supplies are available for operation, with automatic
switchover in case of a failure.
Remote (Station)—A radio in a network that communicates with an
associated master station.
Remote Terminal Unit—See RTU.
RSSI—Received Signal Strength Indication. A measure, in dB, of the
strength of the signal received by a radio from an antenna. The radio
must be calibrated for the RSSI value to be meaningful.
RTU—Remote Terminal Unit. A data collection device installed at a
remote radio site.
SCADA—Supervisory Control And Data Acquisition. An overall term
for the functions commonly provided through an MAS radio system.
Standing Wave Ratio—See SWR.
Supervisory Control And Data Acquisition—See SCADA.
SWR—Standing Wave Ratio. A parameter related to the ratio between
forward transmitter power and the reflected power from the antenna
system. As a general rule, reflected power should not exceed 10% of the
forward power (≈ 2:1 SWR).
8 Installation and Operation Guide MDS 05-3624A01, Rev. A
3.0 INSTALLATION
There are three main requirements for installing the transceiver—ade-
quate and stable primary power, a good antenna system, and the correct
data connections between the transceiver and the data device. MDS
OEM-L/ss radios are available as stand-alone boards or in small enclo-
sures. Figure 5 shows the connections that are made to the stand-alone
board.
Invisible place holder
Figure 5. Connections to the Stand-Alone Board
3.1 Installation Steps
Below are the basic steps for installing the transceiver. In most cases,
these steps alone are sufficient to complete the installation. More
detailed explanations appear at the end of these steps.
1. Mount the transceiver to a stable surface using the brackets supplied
with the radio.
2. Install the antenna and antenna feedline for the station. Preset direc-
tional antennas in the desired direction.
3. Measure and install the primary power for the radio.
NOTE: Use the radio in negative ground systems only.
EXTERNAL
INTERFACE
CONNECTOR
(DB-25) ANTENNA
CONNECTOR
(BNC)
POWER CONNECTOR
(TIP/RING BARREL TYPE)
MDS 05-3624A01, Rev. A Installation and Operation Guide 9
4. Set the radio configuration. The transceiver is designed for quick
installation with a minimum of software configuration required in
most cases. The selections that must be made or verified for new
installations are:
• Transmit frequency
• Receive frequency
• Network address
The operating frequencies are not set at the factory unless they were
specified at the time of order. Determine the transmit and receive
frequencies to be used, and follow the steps below to program them.
5. Connect a hand-held terminal (HHT) to the DATA INTERFACE con-
nector. When the HHT beeps, press to receive the ready “>”
prompt.
a. Set the transmit frequency with the TX xxx.xxx command.
Press after the command.
b. Set the receive frequency with the RX xxx.xxx command.
Press after the command.
c. Set the network address with the ADDR xxx command.
Press after the command. After programming, the HHT
reads PROGRAMMED OK to indicate successful entry.
6. Disconnect the HHT from the DATA INTERFACE connector.
7. Connect the data equipment to the transceiver’s DATA INTERFACE
connector. Use only the required pins for the application—do not
use a fully pinned (25 conductor) cable. Basic applications may
require only the use of Pin 2 (transmit data—TXD), Pin 3 (Received
Data—RXD) and Pin 7 (signal ground).
Additional connections may be required for some installations.
Refer to the complete list of pin functions provided in Table 4 on
page 12.
3.2 Mounting the Transceiver Board
This is a placeholder for special mounting instructions of the
stand-alone board, if necessary.
ENTER
ENTER
ENTER
ENTER
10 Installation and Operation Guide MDS 05-3624A01, Rev. A
3.3 Mounting the Enclosed Transceiver
Is Section 3.3 to be
retained in this ver-
sion of the manual?
---Van
Figure 6 shows the mounting dimensions of the transceiver.
Invisible place holder
Figure 6. Transceiver Mounting Dimensions
3.4 Antennas and Feedlines
Antennas
The transceiver can be used with a number of antennas. The exact style
depends on the physical size and layout of the radio system. At remote
sites, a directional Yagi (Figure 7) or corner reflector antenna is gener-
ally recommended to minimize interference to and from other users.
Antennas of this type are available from several manufacturers.
8.5"
216 mm
1.75"
4.44 CM
6.63"
168 mm
2.75"
70 mm
7.25"
184 mm
ALTERNATE
POSITION
5.625"
143 mm
2.25"
57 mm
2.0"
50 mm
MDS 05-3624A01, Rev. A Installation and Operation Guide 11
Invisible place holder
Figure 7. Typical Yagi Antenna (mounted to mast)
Feedlines
The selection of antenna feedline is very important. Poor quality cables
should be avoided as they will result in power losses that may reduce the
range and reliability of the radio system.
Table 2 shows the losses that will occur when using various lengths and
types of cable at 200 MHz; Table 3, the losses at 400 MHz. Regardless
of the type of cable used, it should be kept as short as possible to mini-
mize signal loss.
3.5 Power Connection
The transceiver can be operated from any well-filtered 10 to 30 Vdc
power source. The power supply should be capable of providing at least
1 ampere of continuous current.
Table 2. Length vs. Loss in Coaxial Cables at 200 MHz
Cable Type 3 Meters
(10 Feet) 15 Meters
(46 Feet) 30 Meters
(91 Feet) 150 Meters
(525 Feet)
RG-8A/U 0.32 dB 1.6 dB 3.2 dB 16 dB
1/2 inch HELIAX 0.10 dB 0.49 dB 0.98 dB 4.9 dB
7/8 inch HELIAX 0.05 dB 0.27 dB 0.54 dB 2.7 dB
1-1/4 inch HELIAX 0.04 dB 0.20 dB 0.40 dB 2.0 dB
1-5/8 inch HELIAX 0.03 dB 0.17 dB 0.33 dB 1.65 dB
Table 3. Length vs. Loss in Coaxial Cables at 400 MHz
Cable Type 10 Feet
(3.05 Meters) 50 Feet
(15.24 Meters) 100 Feet
(30.48 Meters) 500 Feet
(152.4 Meters)
RG-8A/U 0.51dB 2.53 dB 5.07 dB 25.35 dB
1/2 inch HELIAX 0.12 dB 0.76 dB 1.51 dB 7.55 dB
7/8 inch HELIAX 0.08 dB 0.42 dB 0.83 dB 4.15 dB
1-1/4 inch HELIAX 0.06 dB 0.31 dB 0.62 dB 3.10 dB
1-5/8 inch HELIAX 0.05 dB 0.26 dB 0.52 dB 2.60 dB
12 Installation and Operation Guide MDS 05-3624A01, Rev. A
NOTE: The radio is designed for use only in negative ground systems.
3.6 Data Interface Connections
The transceiver’s DATA INTERFACE connector is used to connect the
transceiver to an external DTE data terminal that supports the EIA-232
(formally RS-232) format. The transceiver supports asynchronous data
rates up to 19200 bps. The data rate at the DATA INTERFACE connector
may differ from the data rate over the air.
Table 4 lists each pin on the DATA INTERFACE connector and describes
its function.
Do not use a 25 wire (fully pinned) cable for connection to the DATA
INTERFACE connector. Use only the required pins for the application.
Damage may result if improper connections are made. For EIA-232 sig-
naling, typical applications require the use of Pins 1 through 8 only.
3.7 Power Conservation
In some installations, such as at solar-powered sites, it may be necessary
to keep the transceiver’s power consumption to an absolute minimum.
This can be accomplished by removing power from the radio. When
power is restored, the radio is ready to receive data within 75 millisec-
onds.
CAUTION
USE
ONLY REQUIRED
PINS
Table 4. DATA INTERFACE Connector Pinouts
Pin
Number Input/
Output Pin Description
1--Protective Ground. Connects to ground (negative supply
potential) on the radio’s PC board and chassis.
2INTXD—Transmitted Data. Accepts TX data from the
connected device.
3 OUT RXD—Received Data. Outputs received data to the
connected device.
4INRTS—Request-to-Send Input. Keys the transmitter when
RTS is at logic high.
5 OUT CTS—Clear-to-Send Output. Goes “high” after the
programmed CTS delay time has elapsed (DCE) or keys
an attached radio when RF data arrives (CTS KEY).
6 OUT DSR—Data Set Ready. Provides a +6 Vdc DSR signal
through a 2.5 kΩ resistor.
7--Signal Ground. Connects to ground (negative supply
potential) at radio’s PC board.
8 OUT DCD—Data Carrier Detect. Goes “high” when the modem
detects a data carrier from the master station.
9 -- Do not connect—Reserved for future use.
MDS 05-3624A01, Rev. A Installation and Operation Guide 13
Invisible place holder
4.0 OPERATION
In-service operation of the transceiver is completely automatic. Once
the unit has been properly installed and configured, operator actions are
limited to observing the front panel LED status indicators for proper
operation.
If all parameters are correctly set, operation of the radio can be started
by following these steps:
1. Apply DC power to the transceiver.
10 -- Do not connect—Reserved for future use.
11 OUT Receive Audio Output. Connects to the audio input of an
external (AFSK) modem. The output impedance is 600 Ω,
and the level is factory set to suit most installations. Use
Pin 7 for the modem’s return lead.
12 -- Do not connect—Reserved for future use.
13 -- Do not connect—Reserved for future use.
14 -- Do not connect—Reserved for future use.
15 -- Do not connect—Reserved for future use.
16 -- Do not connect—Reserved for future use.
17 -- Do not connect—Reserved for future use.
18 IN/OUT Accessory Power. Unregulated Input/Output. Provides a
source of input power for low current accessories.
Excessive drain on this connection will trip self-resetting
fuse F1 on the transceiver PC board. The voltage at this
pin will match the input voltage to the transceiver.
19 OUT 5.8 Vdc Regulated Output. Provides a source of
regulated voltage at 100 mA for low power accessories.
20 -- Do not connect—Reserved for future use.
21 -- Do not connect—Reserved for future use.
22 -- Do not connect—Reserved for future use.
23 IN Auto-Open. A logic high (>4.0 volts) on this pin enables
the DATA INTERFACE for normal data operation. A logic
low (<0.5 volts) on this pin disables data operation and
enables diagnostic operation.
24 -- Do not connect—Reserved for future use.
25 OUT Alarm. A logic low (less than 0.5 volts) on this pin indicates
normal operation. A logic high (greater than 4 volts)
indicates that some alarm condition is present. This pin
can be used as an alarm output, provided the internal
series resistance of 1 kΩ is considered.
Table 4. DATA INTERFACE Connector Pinouts (Continued)
Pin
Number Input/
Output Pin Description
14 Installation and Operation Guide MDS 05-3624A01, Rev. A
2. Observe the LED status panel for the proper indications (Table 5).
3. If not done earlier, refine the antenna heading of the station to maxi-
mize the received signal strength (RSSI) from the master station.
Use the RSSI command from an HHT connected to the radio’s DATA
INTERFACE connector.—See Section 5.0, TRANSCEIVER PRO-
GRAMMING. This can also be done with a DC voltmeter as
described in Section 4.2, RSSI Measurement.
4.1 LED Indicators
Table 5 describes the function of each status LED.
5.0 TRANSCEIVER PROGRAMMING
Programming and control of the transceiver (administrative mode) is
performed through the radio’s DATA INTERFACE connector with an MDS
Hand-Held Terminal (MDS P/N 02-1501A01). This section contains a
reference chart (Table 7) followed by detailed descriptions for each user
command.
NOTE: In addition to HHT control, Windows-based software is avail-
able (MDS P/N 03-3156A01) to allow diagnostics and
programming using a personal computer. An installation
booklet and on-line instructions are included with the soft-
ware. Contact MDS for ordering information.
PWR DCD TXD RXD
Table 5. LED Status Indicators
LED Name Description
PWR • Continuous—Power is applied to the radio, no problems detected.
• Rapid flash (five times-per-second)—Fault indication.
• Flashing once every second—Unit is not programmed. Radio is in
Bootloader mode.
DCD Flashing—Indicates the radio is receiving intermittent data frames.
TXD An EIA-232 mark signal is being received at the DATA INTERFACE
connector.
RXD An EIA-232 mark signal is being sent out from the DATA INTERFACE
connector.
MDS 05-3624A01, Rev. A Installation and Operation Guide 15
5.1 Hand-Held Terminal Connection & Startup
This section gives basic information for connecting and using the MDS
Hand-Held Terminal. For more information about the terminal, refer
also to the instructions included with each HHT kit.
The steps below assume that the HHT has been configured for use with
the transceiver (80 character screen display). If the HHT was previously
used with a different model transceiver, or if its default settings have
been changed, refer to Section 5.2, Hand-Held Terminal Setup for setup
details.
Follow these steps to connect the HHT:
1. Connect the HHT’s coiled cord to the DATA INTERFACE (DB-25)
connector on the radio as shown in Figure 8. Pin 23 of the HHT
cable must be grounded to enable the diagnostic channel. (See
Table 4.) This automatically places the radio into the control and
programming mode.
2. When the HHT is connected, it runs through a brief self-check,
ending with a beep. After the beep, press to obtain the ready
“>” prompt.
I am guessing here
about the look of the
connector. If this is
way off, I would like to
look at the real thing
during my next visit.
---Van
Invisible place holder
Figure 8. Hand-Held Terminal Connected to the Transceiver
ENTER
Z
CTRL
U
+
–
K
*
F
/
A
F1
V
,
Q
#
)
G
(
B
F2
SHIFT ESC
W
=
R
7
M
4
H
1
C
F3
BKSP
X
0
S
8
N
5
I
2
D
F4
SPACE
Y
T
9
O
6
3
E
F5
ENTER
J
L
P
16 Installation and Operation Guide MDS 05-3624A01, Rev. A
5.2 Hand-Held Terminal Setup
The following is a set of instructions for re-initializing an HHT for use
with the transceiver. These steps may be required if the HHT was previ-
ously used with a different radio, or if the HHT default settings have
been inadvertently altered.
1. Plug the HHT into the DATA INTERFACE connector. Enable the
setup mode by pressing the , and keys in
sequence. The display shown in Figure 9 appears.
Invisible place holder
Figure 9. HHT Setup Display
2. The first of 15 menu items is displayed. Settings are reviewed by
pressing the NEXT function controlled by the key. Parameter set-
tings are changed by pressing the ROLL function controlled by the
key.
3. Set up the HHT as listed in Table 6.
Table 6. HHT Operational Settings
Parameter Setting Parameter Setting
Re-init HT NO Scroll On 33rd
Baud Rate 9600 Cursor ON
Comm bits 8,1,n CRLF for CR OFF
Parity Error OFF Self Test FAST
Key Repeat OFF Key Beep ON
Echo OFF Screen Size 80
Shift Keys YES Menu Mode LONG
Ctl Chars PROCS
SHIFT CTRL SPACE
FF
1
FFF
BCDE
A
E
A
MDS 05-3624A01, Rev. A Installation and Operation Guide 17
5.3 Keyboard Commands
Table 7 is a reference chart of software commands for the transceiver.
Programmable information is shown in brackets [ ] following the com-
mand name. See Section 5.4, Detailed Command Descriptions for
detailed command descriptions.
Entering Commands
To enter a command, type the command, followed by an key-
stroke. For programming commands, the command is followed by
and the appropriate information or values, then .
Here are some additional points to remember when using the HHT:
• Use the key to access numbers; press again to return to letter
mode.
• Use the key to edit information or commands entries.
• The flashing square cursor ( ) indicates that letter mode is
selected.
• The flashing superscript rectangular cursor ( ) indicates that
number mode is selected.
Error Messages
Listed below are some possible error messages that may be encountered
when using the HHT:
UNKNOWN COMMAND—The command was not recognized. Refer to the
command description for command usage information.
INCORRECT ENTRY—The command format or its associated values were
not valid. Refer to the command description for command usage infor-
mation.
COMMAND FAILED—The command was unable to successfully complete.
This may indicate an internal software problem.
NOT PROGRAMMED—Software was unable to program the internal radio
memory or the requested item was not programmed.This is a serious
internal radio error. Contact MDS for assistance.
TEXT TOO LONG—Response to OWN or OWM command when too many
characters have been entered. Refer to the command description for
command usage information.
NOT AVAILABLE—The entered command or parameter was valid, but it
referred to a currently unavailable choice. Refer to the command
description for command usage information.
ENTER
SPACE ENTER
SHIFT
ESC/BKSP
18 Installation and Operation Guide MDS 05-3624A01, Rev. A
ACCESS DENIED—The command is unavailable to the user. Refer to the
command descriptions for command information.
EEPROM FAILURE— The INIT command was unable to write to EEPROM.
This is a serious internal radio error. Contact MDS for assistance.
Table 7. Command summary
Command name Function
ADDR [0–255]
Details page 19
Set or display the network address of the radio.
AMASK [0000
0000–FFFF FFFF]
Details page 19
Set or display hex code identifying which events
trigger an alarm.
BAUD [xxxxx abc]
Details page 20
Set or display the DATA INTERFACE data rate
and control bits.
CTS [0–255]
Details page 20
Set or display the Clear-to-Send delay in
milliseconds.
CTSHOLD [0–60000]
Details page 21
Set or display the delay, in milliseconds, at the
end of a CTS line response; CTS Key operation
only.
DEVICE [DCE | CTS KEY]
Details page 21
Set or display the device behavior of the radio.
DKEY
Details page 21
Dekey the radio (transmitter OFF). This is
generally a radio test command.
INIT
Details page 22
Set radio parameters to factory defaults.
KEY
Details page 22
Key the radio (transmitter ON). This is generally
used for radio testing.
OWM [XXX...]
Details page 22
Set or display the owner’s message.
OWN [XXX...]
Details page 22
Set or display the owner’s name.
PWR [L | M | H]
Details page 23
Set or display the transmit power setting.
RSSI and RSSI!
Details page 23
Display the Received Signal Strength Indication.
RX [xxx.xxx]
Details page 23
Set or display the receive frequency.
RXTOT [NONE | 1–255]
Details page 23
Set or display the value of the receive time-out
timer.
SER
Details page 24
Display the radio serial number.
SREV
Details page 24
Display the software revision level.
MDS 05-3624A01, Rev. A Installation and Operation Guide 19
5.4 Detailed Command Descriptions
The only critical commands for most applications are transmit fre-
quency (TX xxx.xxx), receive frequency (RX xxx.xxx), and network address
(ADDR xxx). However, proper use of the additional commands allows
you to tailor the transceiver for a specific use or conduct basic diagnos-
tics on the radio. This section gives more detailed information for the
user commands previously listed in Table 7.
In many cases, the commands shown here can be used in two ways.
First, you can type only the command name to view the currently pro-
grammed data. Secondly, you can set or change the existing data by
typing the command, followed by a space, and then the desired entry. In
the list below, allowable data values, if any, are shown in brackets fol-
lowing the command name. The separation of values by pipes (|) indi-
cates that you can enter one of the values in the list.
ADDR [0–255]
The ADDR command displays or sets the network address of the radio. In
order for all the radios in a network to communicate, their network
addresses must be identical.
AMASK [0000 0000–FFFF FFFF]
The AMASK (alarm mask) command displays or sets which events cause
the alarm output signal to be active. Normally, the mask is FFFF FFFF,
meaning that any of the 32 possible events will activate the alarm output
signal. No special configuration is required for typical applications.
Entering the AMASK command alone displays the current setting of
alarm events in hexadecimal format.
Entering the AMASK command followed by an eight-digit hexadecimal
number reprograms the specified events to trigger an alarm.
Each bit that is a ‘1’ identifies an associated alarm condition that can
trigger the alarm output status line. Each bit that is a ‘0’ treats the asso-
ciated alarm as irrelevant when deciding whether or not to assert the
alarm output status line.
STAT
Details page 24
Display the current alarm status.
TOT [1–255 | ON | OFF]
Details page 24
Set or display the time-out timer status and the
timer delay in milliseconds.
TX [xxx.xxx]
Details page 24
Set or display the transmit frequency.
Table 7. Command summary (Continued)
Command name Function
20 Installation and Operation Guide MDS 05-3624A01, Rev. A
Thus, an eight-digit hexadecimal number can classify up to 32 events as
alarm triggers for the alarm output status line. See Table 8 on page 26
for a list of the event codes and their hex values. The hex value of the
mask is simply the sum of the hex values of the event codes corre-
sponding to the alarm triggering events.
BAUD [xxxxx abc]
This command sets (or displays) the communication attributes for the
DATA INTERFACE port.
The first parameter (xxxxx) is baud rate. Baud rate is specified in
bits-per-second (bps) and must be one of the following speeds: 1200,
2400, 4800, 9600, or 19200.
The second parameter of the BAUD command (abc) is a three-character
block indicating how the data is encoded:
a = Data bits (7 or 8)
b = Parity (N for None, O for Odd, E for Even)
c = Stop bits (1 or 2)
The factory default setting is 9600 baud, 8 data bits, no parity, 1 start bit,
and 1 stop bit (Example: 9600 8N1).
NOTE: 7N1, 8O2, and 8E2 are invalid communication settings and are
not supported by the transceiver.
CTS [0–255]
The CTS (clear-to-send) command sets or displays the timer value asso-
ciated with the CTS line response. The command parameter ranges from
0 to 255 milliseconds.
For DCE operation (see DEVICE command), the timer specifies how long
to wait after the RTS line goes high, before the radio asserts CTS and
the DTE can transmit the data. A CTS value of zero keys the radio and
asserts the CTS line immediately after the RTS line goes high.
For CTS Key operation (see DEVICE command), the timer specifies how
long to wait after asserting the CTS, before sending data out the DATA
INTERFACE port. A timer value of zero means that data will be sent out
the data port without imposing a key-up delay. (Other delays may be
present, based on selected radio operating parameters.)
MDS 05-3624A01, Rev. A Installation and Operation Guide 21
CTSHOLD [0–60000]
For CTS Key operation (see DEVICE command), the CTSHOLD command
sets or displays the timer value associated with the end of a CTS line
response. The timer value specifies the length of time that CTS remains
following the transmission of the last character from the RXD pin of the
DATA INTERFACE port. The time is in milliseconds. The default value is
0, which means that CTS drops immediately after the last character is
transmitted.
For DCE operation (see DEVICE command), this command has no effect.
The response CTSHOLD n/a is displayed.
DEVICE [DCE | CTS KEY]
The DEVICE command sets or displays the device behavior of the radio.
The command parameter is either DCE or CTS KEY.
The default selection is DCE. In this mode, CTS goes high following
RTS, subject to the CTS programmable delay time. Keying is stimulated
by the input of characters at the data port. Hardware flow control is
implemented by signaling the CTS line if data arrives faster than it can
be buffered and transmitted.
If CTS KEY is selected, the radio is assumed to be controlling another
radio. The RTS line is ignored and the CTS line is used as a keyline con-
trol for the other radio. CTS is asserted immediately following the
receipt of RF data, but data is not sent out the DATA INTERFACE port until
the CTS programmable delay time has expired. (This gives the other
radio time to key.)
DKEY
This command deactivates the transmitter after it has been keyed with
the KEY command.
NOTE: The DKEY and KEY commands are not intended for normal
operation. They are tools for field testing and installation.
22 Installation and Operation Guide MDS 05-3624A01, Rev. A
INIT
The INIT command is used to re-initialize the radio’s operating parame-
ters to the factory defaults. This may be helpful when trying to resolve
configuration problems that may have resulted from the entry of one or
more improper command settings. Entry of this command allows you to
get back to a known working state. The following changes to the radio
are made when INIT is entered:
•AMASK is set to FFFF FFFF
•BAUD is set to 9600 baud, 8 data bits, no parity, and 1 stop bit
(9600 8N1)
•CTS is set to 0
•CTSHOLD is set to 0
•DEVICE is set to DCE
•PWR is set to H [+33 dBm (2 watts)]
•RXTOT is set to NONE
•TOT is set to OFF
All other commands stay at their previously established settings.
KEY
This command activates the transmitter. The transmitter stays keyed
until either the DKEY command is entered, or the transmitter time-out
timer is enabled and times out. See also the DKEY and TOT commands.
NOTE: The KEY and DKEY commands are not intended for normal
operation. They are tools for field testing and installation.
OWM [XXX...]
This is a command to display or set an owner’s message. To program
the owner’s message, type OWM then the message, followed by .
The maximum number of characters that can be entered is 30.
To display the owner’s message, type OWM then . The owner’s
message appears on the display.
OWN [XXX...]
This is a command to display or set an owner’s name. To program the
owner’s name, type OWN then the name, followed by . The max-
imum number of characters that can be entered is 30.
To display the owner’s name, type OWN then . The owner’s
name appears on the display.
ENTER
ENTER
ENTER
ENTER
MDS 05-3624A01, Rev. A Installation and Operation Guide 23
PWR [L | M | H]
NOTE: This function may not be available, depending on certification
requirements for a particular region.
This command displays or sets the desired RF forward output power set-
ting of the radio. The PWR command parameter is specified as L (low),
M (medium), or H (high). The default setting is H. The values of L, M, and
H are determined by factory calibration. Typically they are:
L = 20 dBm (100 mW)
M = 30 dBm (1 W)
H = 33 dBm (2 W)
RSSI and RSSI!
These commands continuously display the radio’s Received Signal
Strength Indication (RSSI) in dBm units. Incoming signal strengths
from –50 dBm to –120 dBm are displayed.
The RSSI command causes the diagnostic port to enter an RSSI update
mode. The port displays an updated RSSI output line at intervals of
approximately 1 second. Press to terminate the display.
The RSSI! command displays a one-time reading of the RSSI at the diag-
nostic port.
NOTE: The RSSI reading is valid only if the unit has been properly
calibrated.
RX [xxx.xxx]
It was unclear from
the markup whether
there should be
something or nothing
in the second para-
graph under RX.
This command sets or displays the radio’s receive frequency in MHz.
The frequency must be an integer multiple of the step size and must be
in the valid range. If the entered frequency is invalid, the HHT displays
the message INCORRECT ENTRY.
There is no factory default. RX is factory set to customer order.
RXTOT [NONE | 1–255]
The RXTOT command sets or displays the receive time-out timer value in
minutes. This timer triggers an alarm (event 12) if data is not detected
within the specified time.
Entering the RXTOT command without a parameter displays the timer
value in minutes. Entering the RXTOT command with a parameter
ranging from 1 to 255 resets the timer in minutes. Entering the RXTOT
command with the parameter NONE disables the timer.
ENTER
24 Installation and Operation Guide MDS 05-3624A01, Rev. A
SER
This command displays the radio’s serial number as recorded at the fac-
tory.
SREV
This command displays the software revision level of the transceiver
firmware.
STAT
This command displays the current alarm status of the transceiver.
If no alarms exist, the message NO ALARMS PRESENT appears at the top
of the HHT display.
If an alarm does exist, a two-digit code (00–31) is displayed and the
alarm is identified as MAJOR or MINOR. A brief description of the alarm
code is also given. Detailed descriptions of event codes are provided in
Table 8 on page 26.
If more than one alarm exists, the word MORE appears at the bottom of
the screen and additional alarms are viewed by pressing the
key. Alarms are displayed in ascending order, major alarms before
minor ones.
TOT [1–255 | ON | OFF]
This command sets or displays the transmitter time-out timer value
(1–255 seconds), as well as the timer status (ON or OFF). The command
parameter can be either the timer value or the status, but not both. The
parameter ON enables the timer; OFF disables the timer.
If the timer is on, and the radio remains keyed for a longer duration than
the TOT value, the transmitter is automatically unkeyed. When this hap-
pens, the radio must be commanded back to an unkeyed state before a
new keying command is accepted.
By default the timer is ON and set to 30 seconds.
TX [xxx.xxx]
It was unclear from
the markup whether
there should be
something or nothing
in the second para-
graph under TX.
This command sets or displays the radio’s transmit frequency in MHz.
The frequency must be an integer multiple of the step size and must be
in the valid range. If the entered frequency is invalid, the HHT displays
the message INCORRECT ENTRY.
There is no factory default. TX is factory set to customer order.
ENTER
MDS 05-3624A01, Rev. A Installation and Operation Guide 25
6.0 TROUBLESHOOTING
Successful troubleshooting of the radio system is not difficult, but it
requires a logical approach. It is best to begin troubleshooting at the
master station, as the rest of the system depends on the master for
polling commands. If the master station has problems, the operation of
the entire network can be compromised.
It is good practice to start by checking the simple things. For proper
operation, all radios in the network must meet these basic requirements:
• Adequate and stable primary power. The radio contains an inter-
nal self-resetting fuse (4A). Remove and re-apply primary power
to reset.
• Secure connections (RF, data, and power)
• An efficient and properly aligned antenna system with a good
received signal strength (at least –90 dBm). It is possible for a
system to operate with weaker signals, but reliability will be
degraded.
• Proper programming of the transceiver’s operating parameters
(see Section 5.0, TRANSCEIVER PROGRAMMING).
• The correct interface between the transceiver and the connected
data equipment (correct cable wiring, proper data format, timing,
etc.)
6.1 LED Indicators
The LED status indicators are an important troubleshooting tool and
should be checked whenever a problem is suspected. Table 5 on page 14
describes the function of each status LED.
6.2 Event Codes
When an alarm condition exists, the transceiver creates a code that can
be read on an HHT connected to the DATA INTERFACE port. These codes
can be very helpful in resolving many system difficulties. Refer to
Table 8 for a definition of the event codes.
Checking for Alarms—STAT command
To check for alarms, enter STAT on the HHT. If no alarms exist, the mes-
sage NO ALARMS PRESENT appears at the top of the display (Figure 10).
26 Installation and Operation Guide MDS 05-3624A01, Rev. A
Invisible place holder
Figure 10. HHT Display in Response to STAT Command
If an alarm does exist, the STAT command displays a two-digit alarm
code (00–31) and the event is identified as a Major or Minor Alarm. A
brief description of the alarm is also given.
If more than one alarm exists, the word MORE appears at the bottom of
the screen. To view additional alarms, press .
Major Alarms vs. Minor Alarms
Major Alarms—report serious conditions that generally indicate a hard-
ware failure, or other abnormal conditions that will prevent (or seriously
degrade) further operation of the transceiver. Major alarms generally
indicate the need for factory repair. Contact MDS for further assistance.
Minor Alarms—report conditions that, under most circumstances will
not prevent transceiver operation. These include out-of-tolerance condi-
tions, baud rate mismatches, etc. The cause of these alarms should be
investigated and corrected to prevent eventual system failure.
Event Code Definitions
Table 8 contains a listing of all event codes that may be reported by the
transceiver.
ENTER
Table 8. Event Codes
Event
Code Hex Value Event
Class Description STATUS Message
00 0000 0000 -- No alarms present. NO ALARMS
PRESENT
1–3 -- -- Not used. --
04 0800 0000 Major One or both of the internal programmable
synthesizer loops is reporting an out-of-lock
condition.
Synthesizer
Out-of-Lock
5–7 -- -- Not used. --
08 0080 0000 Major The system is reporting that it has not been
calibrated. Factory calibration is required for proper
radio operation.
Radio Not Calibrated
MDS 05-3624A01, Rev. A Installation and Operation Guide 27
09 -- -- Not used. --
10 0020 0000 Major The internal microcontroller was unable to properly
program the system to the appropriate EEPROM
defaults. A hardware problem may exist.
EEPROM Write Failure
11 -- -- Not used. --
12 0008 0000 Major Receiver time-out. No data received within the
specified receiver time-out time. Receiver time-out
13 0004 0000 Major Transmitter time-out. The radio was keyed for a
duration exceeding the time-out timer setting. (This
alarm clears the next time the radio keys.)
Transmitter time-out
14–16 -- -- Not used. --
17 0000 4000 Minor A data parity fault has been detected on the DATA
INTERFACE connector. This usually indicates a
parity setting mismatch between the radio and the
RTU.
Data Parity Error
18 0000 2000 Minor A data framing error has been detected on the
DATA INTERFACE connector. This may indicate a
baud rate mismatch between the radio and the
RTU.
Data Framing Error
19–30 -- -- Not used. --
Table 8. Event Codes (Continued)
Event
Code Hex Value Event
Class Description STATUS Message
28 Installation and Operation Guide MDS 05-3624A01, Rev. A
7.0 TECHNICAL REFERENCE
7.1 OEM-L/ss Transceiver Specifications
This section con-
forms with the specs
literature Kevin sent
me. Is there anything
to add for this
manual? ---Van
MODELS
MDS OEM-L2: Licensed 220 MHz Transceiver
MDS OEM-L4: Licensed 400 MHz Transceiver
MDS OEM-L9: Licensed 900 MHz Transceiver
MDS OEM-SS9: Frequency Hopping Spread Spectrum
900 MHz Transceiver
ENVIRONMENTAL
Temperature Range: –30 to 60 degrees C
Humidity: 95% at 40 degrees C
Board Dimensions: 0.65″ H x 4.60″ W x 4.25″ D
2 cm H x 11.7 cm W x 10.7 cm D
Weight: 0.2 pounds
0.09 kilograms
RF Connector: BNC
TRANSMITTER
Power Output: 2 watts (+33 dBm)
[1 watt (+30 dBm) for FHSS version]
Output Impedance: 50 Ω
Frequency Stability: 1.5 ppm
Transmitter Duty Cycle: 50%
RECEIVER
Type: Double conversion superheterodyne
Sensitivity: -108 dBm @ 1 x 10-6 BER
Adjacent Channel Performance: 60 dB EIA
DATA CHARACTERISTICS
Throughput: 9600 bps
The specs literature
Kevin sent me does
not include 19200
bps, though it is in
the specs document I
was given. Has this
changed? ---Van
Port Speed: 1200, 2400, 4800, 9600, 19200 bps programmable
Parity: 7/8 bit with or without Parity ASYNC
Modem: Digital CPFSK
DIAGNOSTICS
Self Test: Yes
Local RS-232 RSSI and Setup: Yes
4 LED Display: RS, TX, CD, and PWR
PRIMARY POWER
Please verify primary
power specs.
Voltage: 10 to 30 Vdc
TX Supply Current: 1.5 amps max
MDS 05-3624A01, Rev. A Installation and Operation Guide 29
RX Supply Current: Operation—< 60 mA (nominal)
Standby—powered off (recovery time to receive
≤ 75 ms)
Fuse: 4 amp polyfuse, self-resetting, internal
(remove preimary power to reset)
Reverse Polarity Protection: Diode across primary input
7.2 Bench Testing Setup
Figure 11 shows a sample test setup that can be used to verify the basic
operation of transceivers in a shop setting. The test can be performed
with any number of remote radios by using a power divider with the
required number of output connections.
The RTU simulator shown in the test setup (MDS Part No. 03-2512A01)
is a microcontroller that emulates a remote terminal unit operating at
1200, 2400, 4800, or 9600 bps. Custom software is supplied with the
RTU simulator that allows continuous polling of remote radios using an
IBM-compatible personal computer. The software reports the number of
polls sent, polls received, and the number of errors detected.
NOTE: It is very important to use attenuation between all units in the
test setup. The amount of attenuation required will depend on
the number of units being tested and the desired signal strength
(RSSI) at each transceiver during the test. In no case should a
signal greater than –50 dBm be applied to any transceiver in
the test setup.
Invisible place holder
Figure 11. Typical setup for bench testing of radios
L/ss
L/ss
L/ss
MASTER STATION
COMPUTER RUNNING MDS
POLL.EXE PROGRAM
L/ss
REMOTE
REMOTE
REMOTE
REMOTE
NON-RADIATING ATTENUATOR
•Install on any unused divider ports
•5W minimum rating
POWER DIVIDER
POWER ATTENUATORS
•Fixed or adjustable
•5W minimum rating
RTU SIMULATORS
MDS P/N 03-2512A01
30 Installation and Operation Guide MDS 05-3624A01, Rev. A
7.3 Helical Filter Adjustment
If the operating frequency of the radio is changed significantly, the
helical filters should be adjusted for maximum received signal strength
(RSSI). To adjust the filters, proceed as follows:
1. For enclosed units, remove the top cover from the transceiver by
loosening the four screws and lifting straight up.
2. Locate the helical filters on the PC board. See Figure 12.
3. Apply a steady signal to the radio at the programmed receive fre-
quency (–80 dBm level recommended; no stronger than –60 dBm).
This can be done with a signal generator or an over-the-air signal.
4. Measure the radio’s RSSI using one of the following methods:
• With an HHT (See Section 5.0, TRANSCEIVER PROGRAM-
MING on page 14).
• With MDS Radio Configuration Software (See Section 7.4,
Upgrading the Radio’s Software on page 31).
•With a voltmeter connected to Pin 21 of the DATA INTERFACE
connector (See Section 4.2, RSSI Measurement on page 16).
5. With a non-metallic adjustment tool, adjust each section of the
helical filter for maximum RSSI. Re-install the cover to the trans-
ceiver.
I am sure this figure
needs changing. Can I
call the helical
adjustments out
from the front cover
image? Or do you
want a diagram?
---Van
Invisible place holder
Figure 12. Helical Filter Location
FRONT PANEL
OF RADIO
J301
U104
U101
U202
HELICAL
ADJUSTMENTS
U203
SHIELD
COVER
MDS 05-3624A01, Rev. A Installation and Operation Guide 31
7.4 Upgrading the Radio’s Software
From time to time, new product features or software maintenance files
may become available from MDS. This section describes the steps nec-
essary to install new software into the transceiver using a PC connected
to the radio’s DATA INTERFACE port.
Upgrade software can be obtained in a number of ways. The MDS Web
site at www.microwavedata.com contains an FTP area with software
files for several radio models. You can browse the listings to see if there
are files pertaining to your particular model. There is no charge for this
service.
In addition, you can also contact MDS to request radio software. Soft-
ware files can be sent to you via e-mail or on a 3.5” diskette. There may
be a nominal charge for the software depending on the nature of the
upgrade.
NOTE: Software upgrades are distributed as ASCII files with a “.S28”
extension. These files use the Motorola S-record format.
Using the Radio Software Upgrade Diskette
A software upgrade diskette may be purchased from MDS to add new
product features to the radio. The upgrade kit includes a diskette (MDS
P/N 06-3501A01) with the most current radio software and an instruc-
tion booklet. Contact MDS for ordering information. When calling,
please have the serial number(s) available for the radio(s) that you wish
to upgrade.
The upgrade software can be run on an IBM-compatible computer con-
nected to the radio’s DATA INTERFACE port via a DB-9 to DB-25 adapter
(MDS P/N ??-????A??). If desired, an adapter cable may be constructed
from scratch using the information shown in Figure 13.
Please verify the dia-
gram. ---Van
Invisible place holder
Figure 13. DB-25 to DB-9 Adapter Cable
To initiate the upgrade, insert the upgrade diskette in Drive A:. Set the
working directory to A: (example: from a DOS prompt type A:\). Next,
type UPGRADE and press the ENTER key. (If you have the radio connected
via the Com2 serial port, type UPGRADE-2 instead.) The upgrade soft-
ware will normally run automatically without any further prompts.
RXD
TXD
GND
2
3
5
DB-9 FEMALE
(TO COMPUTER)
TXD
RXD
GND
2
3
7
DB-25 MALE
(TO RADIO)
32 Installation and Operation Guide MDS 05-3624A01, Rev. A
The radio’s PWR LED will flash rapidly to confirm that a download is
in process. The download takes about two minutes.
NOTE: If a software download fails, the radio is left unprogrammed
and inoperative. This is indicated by the PWR LED flashing
slowly (1 second on, 1 second off). This condition is only
likely if a power failure occurred to the computer or radio
during the downloading process. The download can be
attempted again when the fault has been corrected.
Using Radio Configuration Software
If you already have software that you wish to download into the trans-
ceiver, Radio Configuration Software (MDS P/N 03-3156A01) may be
used to perform the installation. To use this method, proceed as follows:
Connect a PC to the radio’s DATA INTERFACE port via a DB-9 to DB-25
adapter (MDS P/N ??-????A??). If desired, an adapter cable may be con-
structed from scratch using the information shown in Figure 13.
Run the Radio Configuration software. Under the SYSTEM menu, select
RADIO SOFTWARE UPGRADE . Follow the prompts and online instructions
to locate the desired software and complete the upgrade.
The radio’s PWR LED will flash rapidly to confirm that a download is
in process. The download takes about two minutes.
NOTE: If a software download fails, the radio is left unprogrammed
and inoperative. This is indicated by the PWR LED flashing
slowly (1 second on, 1 second off). This condition is only
likely if a power failure occurred to the computer or radio
during the downloading process. The download can be
attempted again when the fault has been corrected.
MDS 05-3624A01, Rev. A Installation and Operation Guide 33
7.5 dBm-Watts-Volts Conversion Chart
Table 9 is provided as a convenience for determining the equivalent
wattage or voltage of an RF power expressed in dBm.
Table 9. dBm-Watts-Volts Conversion—for 50 Ohm Systems
dBm V Po
+53 100.0 200W
+50 70.7 100W
+49 64.0 80W
+48 58.0 64W
+47 50.0 50W
+46 44.5 40W
+45 40.0 32W
+44 32.5 25W
+43 32.0 20W
+42 28.0 16W
+41 26.2 12.5W
+40 22.5 10W
+39 20.0 8W
+38 18.0 6.4W
+37 16.0 5W
+36 14.1 4W
+35 12.5 3.2W
+34 11.5 2.5W
+33 10.0 2W
+32 9.0 1.6W
+31 8.0 1.25W
+30 7.10 1.0W
+29 6.40 800mW
+28 5.80 640mW
+27 5.00 500mW
+26 4.45 400mW
+25 4.00 320mW
+24 3.55 250mW
+23 3.20 200mW
+22 2.80 160mW
+21 2.52 125mW
+20 2.25 100mW
+19 2.00 80mW
+18 1.80 64mW
+17 1.60 50mW
+16 1.41 40mW
+15 1.25 32mW
+14 1.15 25mW
+13 1.00 20mW
+12 .90 16mW
+11 .80 12.5mW
+10 .71 10mW
+9 .64 8mW
+8 .58 6.4mW
+7 .500 5mW
+6 .445 4mW
+5 .400 3.2mW
+4 .355 2.5mW
+3 .320 2.0mW
+2 .280 1.6mW
+1 .252 1.25mW
dBm V Po
0 .225 1.0mW
-1 .200 .80mW
-2 .180 .64mW
-3 .160 .50mW
-4 .141 .40mW
-5 .125 .32mW
-6 .115 .25mW
-7 .100 .20mW
-8 .090 .16mW
-9 .080 .125mW
-10 .071 .10mW
-11 .064
-12 .058
-13 .050
-14 .045
-15 .040
-16 .0355
dBm mV Po
-17 31.5
-18 28.5
-19 25.1
-20 22.5 .01mW
-21 20.0
-22 17.9
-23 15.9
-24 14.1
-25 12.8
-26 11.5
-27 10.0
-28 8.9
-29 8.0
-30 7.1 .001mW
-31 6.25
-32 5.8
-33 5.0
-34 4.5
-35 4.0
-36 3.5
-37 3.2
-38 2.85
-39 2.5
-40 2.25 .1µW
-41 2.0
-42 1.8
-43 1.6
-44 1.4
-45 1.25
-46 1.18
-47 1.00
-48 0.90
dBm mV Po
-49 0.80
-50 0.71 .01µW
-51 0.64
-52 0.57
-53 0.50
-54 0.45
-55 0.40
-56 0.351
-57 0.32
-58 0.286
-59 0.251
-60 0.225 .001µW
-61 0.200
-62 0.180
-63 0.160
-64 0.141
dBm µV Po
-65 128
-66 115
-67 100
-68 90
-69 80
-70 71 .1nW
-71 65
-72 58
-73 50
-74 45
-75 40
-76 35
-77 32
-78 29
-79 25
-80 22.5 .01nW
-81 20.0
-82 18.0
-83 16.0
-84 11.1
-85 12.9
-86 11.5
-87 10.0
-88 9.0
-89 8.0
-90 7.1 .001nW
-91 6.1
-92 5.75
-93 5.0
-94 4.5
-95 4.0
-96 3.51
-97 3.2
dBm µV Po
-98 2.9
-99 2.51
-100 2.25 .1pW
-101 2.0
-102 1.8
-103 1.6
-104 1.41
-105 1.27
-106 1.18
dBm nV Po
-107 1000
-108 900
-109 800
-110 710 .01pW
-111 640
-112 580
-113 500
-114 450
-115 400
-116 355
-117 325
-118 285
-119 251
-120 225 .001pW
-121 200
-122 180
-123 160
-124 141
-125 128
-126 117
-127 100
-128 90
-129 80 .1ƒW
-130 71
-131 61
-132 58
-133 50
-134 45
-135 40
-136 35
-137 33
-138 29
-139 25
-140 23 .01ƒW
34 Installation and Operation Guide MDS 05-3624A01, Rev. A
MDS 05-3624A01, Rev. A Installation and Operation Guide I-1
INDEX
A
ACCESS DENIED error message 18
Accessories 5
Accessory Power pinout (Pin 18) 13
Alarms
alarm code definitions 26
major vs. minor 26
pinout (Pin 25) 13
using STAT command to display 24
AMASK command 19
Antenna
installation 8
RSSI command used to refine heading 14
system gain, defined 5
Yagi, illustrated 11
Antennas 10–11, ??–11
Applications 2
Multiple Address Systems (MAS) 2
point-to-multipoint system 2
point-to-point system 3
Auto-Open, pinout (Pin 23) 13
B
BAUD command 20
Bench testing (radio performance), 29
Bit, defined 5
Bits-per-second. See BPS
BPS (bits-per-second), defined 5
Byte, defined 5
C
Cable, loss due to length of coaxial 11
COMMAND FAILED error message 17
Command summary, table 18
Commands
AMASK (set/display alarm triggers) 19
BAUD (set/display rate, encoding) 20
CTS (set/display CTS line response timer) 20
DEVICE (set/display radio behavior) 21
DKEY (deactivate transmitter after KEY command) 21
entering on Hand-Held Terminal (HHT) 17
Hand-Held Terminal (HHT) 17
INIT (reinitialize radio to factory defaults) 22
KEY (activate transmitter) 22
OWM (set/display owner’s message) 22
OWN (set/display owner’s name) 22
PWR (set/display RF forward output power) 23
RSSI (display RSSI) 23
RX (set/display receive frequency) 23
RXTOT (set/display receive time-out timer value) 23
SER (display radio serial number 24
SREV (display software revision level) 24
STAT (display current alarm status) 24
TOT (set/display time-out value and timer status) 24
TX (set/display transmit frequency) 24
Connections
for typical systems 2
Conversions, dBm-Watts-Volts 33
CTS command 20
CTS pinout (Pin 5) 12
D
Data interface
connector pinouts 12
installing connection 12
dB. See Decibel 6
dBi, defined 5
dBm, defined 6
DCD
LED 14
pinout (Pin 8) 12
DCE (Data Cirtuit-terminating Equipment), defined 6
Decibel (dB), defined 6
Description, product 1
Detailed 19
DEVICE command 21
Diagnostic Channel Enable, pinout (Pin 23) 13
Diagnostics
interface specifications 28
PC software used for 31
Differences between models 1
Display
alarm status (STAT command) 24
alarm triggers (AMASK command) 19
baud rate and encoding (BAUD command) 20
CTS line response timer (CTS command) 20
owner’s message (OWM command) 22
owner’s name (OWN command) 22
radio behavior (DEVICE command) 21
radio serial number (SER command) 24
receive frequency (RX command) 23
receive time-out timer value (RXTOT command) 23
RF forward output power (PWR command) 23
RSSI (RSSI command) 23
software revision level (SREV command) 24
time-out value and timer status (TOT command) 24
transmit frequency (TX command) 24
DKEY command 21
I-2 Installation and Operation Guide MDS 05-3624A01, Rev. A
Downloading new software 31
DSR pinout (Pin 6) 12
DTE (Data Terminal Equipment), defined 6
E
EEPROM FAILURE error message 18
Enable/disable
diagnostic channel, pinout (Pin 23) 13
Environment specifications 28
Equalization, defined 6
Error messages 17
access denied 18
command failed 17
EEPROM failure 18
incorrect entry 17
not available 17
not programmed 17
text too long 17
unknown command 17
F
Fade margin, defined 6
Feedlines 11
Filter, helical, adjustment 30
Frame, defined 6
Frequency
adjusting helical filter when changed 30
setting. See TX and RX commands
G
Glossary 5
Ground
protective (Pin 1) 12
signal (Pin 7) 12
H
Half-duplex 3
switched carrier operation 4
Hand-Held Terminal (HHT) 5
connected to transceiver, illustrated 15
connection and startup 15
display in response to STAT command, illustrated 26
entering commands 17
error messages displayed on 17
keyboard commands 17
operational settings, table 16
reinitialization display, illustrated 16
reinitializing 16
Hardware flow control, defined 6
Helical filter
adjusting 30
illustration 30
Host computer, defined 6
I
Illustrations
antenna, Yagi 11
DB-25 to DB-9 adapter cable 31
Hand-Held Terminal (HHT) connected to transceiver 15
Hand-Held Terminal (HHT) reinitialization display 16
Hand-Held Terminal display in response to STAT command 26
helical filter locations 30
MAS network 3
MDS 2710A/D model number codes 4
point-to-point link 3
remote station arrangement 8
transceiver connectors & indicators 2
transceiver mounting dimensions 10
INCORRECT ENTRY error message 17
INIT command 22
Installation 8–13
antenna 8
configuring transceiver 9
DATA INTERFACE connection 9
data interface connections 12
power 8
power connection 11
quick start instructions. See inside front cover
steps 8
K
KEY command 22
Keying
continuously keyed versus switched carrier operation 4
on data (DKEY command) 21
switched carrier, defined 4
L
Latency, defined 6
LEDs
DCD 14
indicators, described 14
PWR 14
RXD 14
RXD, Pin 3 12
status indicators, illustrated 14
TXD 14
TXD, Pin 2 12
Loss. See Signal
M
MAS (Multiple Address System) 2
defined 6
illustration 3
Master Station
defined 6
keying behavior 4
MDS 05-3624A01, Rev. A Installation and Operation Guide I-3
MDS. See Microwave Data Systems 7
Microwave Data Systems, contacting 7
Model number codes 4
MDS 2710A/D, illustrated 4
N
NOT AVAILABLE error message 17
NOT PROGRAMMED error message 17
O
Operation 13–??
environment, specifications for 28
Output, 5.8 Vdc regulated, pinout (Pin 19) 13
OWM command 22
OWN command 22
Owner’s message, set/display. See OWM command
Owner’s name, set/display. See OWN command
P
Packaging for shipment. See inside rear cover
Payload data (defined) 7
Performance
testing, 29
Pinouts on data interface 12
PLC (Programmable Logic Controller), defined 7
Point-to-multipoint
defined 7
system 2
Point-to-point
link, illustrated 3
system 3
Poll, defined 7
Power
connection 11
installing 8
LED status indicator (PWR LED) 14
RF, chart for converting dBm-Watts-Volts 33
Power attenuators, use of in testing 29
Procedures
checking for alarms (STAT command) 25
connecting Hand-Held Terminal (HHT) 15
downloading new software 31
entering commands using the Hand-Held Terminal (HHT) 17
helical filter adjustment 30
installation 8
operation 13
performance optimization 14
reading LED status indicators 14
resetting Hand-Held Terminal (HHT) 16
troubleshooting 25–??
Product
accessories 5
description 1
display radio serial number (SER command) 24
model number codes 4
returning for service. See inside rear cover
Programming, transceiver 14–18
PWR
command 23
LED 14
Q
Quick start instructions. See inside front cover
R
Radio
Configuration Software 5, 31
serial number, displaying (SER command) 24
Receive Audio Output pinout (Pin 11) 13
Received signal strength indication See RSSI 7
Receiver
specifications 28
Redundant operation, defined 7
Remote
Station, defined 7
Station, illustrated 8
Resetting
Hand-Held Terminal (HHT) (SHIFT,CTRL,SPACE keys) 16
transceiver (INIT command) 22
Revision level
display software (SREV command) 24
RMA number (returning product for service). See inside rear
cover
RSSI
adjusting helical filter for increased signal strength 30
command 23
command, used to refine antenna heading 14
defined 7
RTS pinout (Pin 4) 12
RTU (Remote Terminal Unit)
defined 7
RTU simulator, 29
RX command 23
RXD LED
description 14
Pin 3 12
RXTOT command 23
S
SCADA (Supervisory Control And Data Acquisition), defined 7
SER command 24
Set
alarm triggers (AMASK command) 19
receive time-out timer value (RXTOT command) 23
Signal
ground (Pin 7) 12
loss due to coaxial cable length, table 11
Simplex 3
single-frequency operation 4
special case of switched carrier operation 4
Software
I-4 Installation and Operation Guide MDS 05-3624A01, Rev. A
diagnostics and control used from PC 31
display revision level 24
upgrades (.S28 files) 31
upgrading 31
used for diagnostics and programming 14
Specifications
diagnostics interface 28
environment 28
receiver 28
transceiver 28–29
transmitter 28
transmitter system 28
SREV command 24
STAT command 24
SWR (Standing Wave Radio), defined 7
T
Tables
accessories 5
alarm code definitions 26
command summary 18
conversions, dBm-Watts-Volts 33
data interface connector pinouts 12
Hand-Held Terminal (HHT) operational settings 16
LED status indicators 14
length vs. loss in coaxial cables 11
Technical reference 28–33
Technical reference,
bench test setup, 29
Testing. See bench testing
TEXT TOO LONG error message 17
Timer, set/display time-out value and status (TOT command) 24
TOT command 24
Transceiver
applications 2
configuring for operation 9
connectors and indicators, illustrated 2
diagnostics using PC software 31
dimensions, mounting 10
mounting 8
mounting enclosed version 10
mounting standalone board 9
programming 14–18
specifications 28–29
upgrading software 31
Transmitter
specifications 28
system specifications 28
Troubleshooting 25–??
connecting Hand-Held Terminal (HHT) for displaying alarm
codes 15
returning product for service. See inside rear cover
STAT command (Status) 25
using PC software for 31
TX command 24
TXD LED
description 14
Pin 2 12
U
UNKNOWN COMMAND error message 17
I-5 Installation and Operation Guide MDS 05-3624A01, Rev. A
NOTES
I-6 Installation and Operation Guide MDS 05-3624A01, Rev. A
IN CASE OF DIFFICULTY...
MDS products are designed for long life and trouble-free operation. However, this equipment, as
with all electronic equipment may have an occasional component failure. The following informa-
tion will assist you in the event that servicing becomes necessary.
FACTORY TECHNICAL ASSISTANCE
Technical assistance for MDS products is available from our Customer Support Team during
business hours (8:00 A.M.–5:30 P.M. Eastern Time). When calling, please give the complete
model number of the radio, along with a description of the trouble symptom(s) that you are expe-
riencing. In many cases, problems can be resolved over the telephone, without the need for
returning the unit to the factory.
Please use the following telephone numbers for product assistance:
716-242-9600 (Phone)
716-242-9620 (FAX)
FACTORY REPAIRS
Component-level repair of radio equipment is not recommended in the field. Many components
are installed using surface mount technology, which requires specialized training and equipment
for proper servicing. For this reason, the equipment should be returned to the factory for any PC
board repairs. The factory is best equipped to diagnose, repair and align your radio to its proper
operating specifications.
If return of the equipment is necessary, you will be issued a Returned Material Authorization
(RMA) number. The RMA number will help expedite the repair so that the equipment can be
repaired and returned to you as quickly as possible. Please be sure to include the RMA number
on the outside of the shipping box, and on any correspondence relating to the repair. No equipment
will be accepted for repair without an RMA number.
A statement should accompany the radio describing, in detail, the trouble symptom(s), and a
description of any associated equipment normally connected to the radio. It is also important to
include the name and telephone number of a person in your organization who can be contacted if
additional information is required.
The radio must be properly packed for return to the factory. The original shipping container and
packaging materials should be used whenever possible. All factory returns should be addressed to:
When repairs have been completed, the equipment will be returned to you by the same shipping
method used to send it to the factory. Please specify if you wish to make different shipping
arrangements.
Adaptive Broadband Corporation
Customer Service Department
(RMA No. XXXX)
175 Science Parkway
Rochester, NY 14620 USA
175 Science Parkway, Rochester, New York 14620
General Business: +1 (716) 242-9600
FAX: +1 (716) 242-9620
World Wide Web: http://www.mdsroc.com/