GE MDS 4710A, MDS 4710C, MDS 4710M, MDS 9710A, MDS 9710C Technical Manual

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MDS 4710/9710 Series

(Including: MDS 4710A/C/M and MDS 9710A/C/M/T)

Technical Manual

400 MHz and 900 MHz

Remote Data Transceivers

MDS 05-3305A01, Rev. E

OCTOBER 2011

Installation and Operation Guide

QUICK START GUIDE

DB-9 DB-25 DB-9 DB-25

As required for application

TRANSCEIVER

(DCE)

RTU

(DTE)

DB-9 to DB-25 Example

As required for application

RTU

(DTE)

DB-25 to DB-25 Example

TRANSCEIVER

(DCE)

3 2 7 6 4

RTS

RXD TXD

DCD

GND DSR

CTS

RTS

RXD TXD

DCD

GND DSR

CTS

2 3 5 6 7

2 3 4 5 6

7 8

2 3 4 5 6

7 8

DSR

TXD

RXD

GND

RTS CTS

GND DCD

DSR

TXD RXD

GND

RTS CTS

GND DCD

Below are the basic steps for installing the transceiver. See “INSTALLATION” on Page 5 of this guide for detailed instructions.

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

• Use a DB-25 Male connector to connect to the radio. Connections for typical systems 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.)

3. Apply DC power to the radio (10.5–16 Vdc @ 2.5 A minimum)

• Observe proper polarity. The red wire is the positive lead; the black is negative.

4. Set the radio’s basic configuration with a Hand-Held Terminal (HHT)

• Set the transmit frequency (TX xxx.xxxx).

• Set the receive frequency (RX xxx.xxxx).

• Set the baud rate/data interface par ameters as follows. Use the BAUD xx xxx abc com mand, where xxxxx equals the data speed (110–38400 bps) and abc equals the communication parameters as follows:

a = Data bits (7 or 8) b = Parity (N for None, O for Odd, E for Even

c = Stop bits (1 or 2) (Example: BAUD 9600 8N1)

NOTE: 7N1, 8E2 and 8O2 are invalid parameters and are not supported by the transceiver.

5. Verify proper operation by observing the LED display

• Refer to Table 7 on Page 14 for a description of the status LEDs.

• Refine directional antenna headings for maximum receive signal strength using th e RSSI command.

TABLE OF CONTENTS

1.0 GENERAL ................................................................................... 1

1.1 Introduction ......................................................................................1

1.2 Applications ......................................................................................2

Point-to-Multipoint, Multiple Address Systems (MAS) ......................2

Point-to-Point System .......................................................................3

Continuously-Keyed versus Switched-Carrier Operation..................3

Single-Frequency (Simplex) Operation.............................................4

1.3 Model Number Codes ......................................................................4

1.4 Contents of Standard Shipping Packages ........................................4

1.5 Accessories ......................................................................................5

2.0 INSTALLATION............................................................................ 5

2.1 Installation Step s ..............................................................................6

2.2 Transceiver Mounting .......................................................................7

2.3 Antennas and Feedlines ..................................................................9

Feedlines ..........................................................................................9

2.4 Power Connection ..........................................................................10

2.5 Safety/Earth Ground ......................................................................10

2.6 Data Interface Connections ............................................................11

2.7 Using the Radio’s Sleep Mode ............. ... .... ... ... ... .... ... ... ... ... .... ... ...12

System Example...... ... .... ................................................... ... .... ... ...13

3.0 OPERATION..............................................................................13

3.1 LED Indicators ................................................................................14

3.2 RSSI Measurement ........................................................................14

4.0 TRANSCEIVER PROGRAMMING............................................ 15

4.1 Hand-Held Terminal Connection & Startup ....................................15

4.2 Hand-Held Terminal Setup .............................................................16

4.3 Keyboard Commands ....................................................................17

Entering Commands................ .... ... ... ... ... .... ... ... ... ..........................17

Error Messages...............................................................................19

4.4 Detailed Command Descriptions ....................................................21

ALARM............................................................................................21

AMASK [0000 0000–FFFF FFFF]...................................................21

ASENSE [HI/LO].............................................................................23

BAUD [xxxxx abc] ...........................................................................24

BUFF [ON, OFF] [xxx].....................................................................24

CKEY [ON–OFF].............................................................................25

CTS [0–255]....................................................................................25

DATAKEY [ON, OFF]......................................................................25

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual i

DEVICE [DCE, CTS KEY]...............................................................25

DKEY..............................................................................................26

DIN [ON/OFF] .................................................................................26

DLINK [ON/OFF/xxxx]..... ... ... ... .................................................... ...26

DTYPE [NODE/ROOT]...................................................................26

DUMP .............................................................................................26

EMP [ON/OFF]................................................................................26

HREV..............................................................................................27

INIT.................................................................................................27

INIT [4710/9710].............................................................................27

INIT [4720/9720].............................................................................27

KEY.................................................................................................28

MODEL...........................................................................................28

MODEM [xxxx, NONE]....... ... ... .... ...................................................28

OWM [XXX...]..................................................................................28

OWN [XXX...]........................................................................ ..........28

PTT [0–255]....................................................................................28

PWR [20–37]...................................................................................28

RSSI................................................................................................29

RTU [ON/OFF/0-80]........................... ... ... .... ... ... ... ..........................29

RX [xxx.xxxx] ............................................................................ ... ...29

RXLEVEL [–20 to +6]......................................................................30

RXTOT [NONE, 1-1440] .... ... ... .... ... ... ... ... .... ... ................................30

SCD [0-255]....................................................................................30

SER.................................................................................................30

SHOW [DC, PORT, PWR]...............................................................30

SNR ................................................................................................30

SREV..............................................................................................31

STAT...............................................................................................31

TEMP..............................................................................................31

TOT [1-255, ON, OFF]....................................................................31

TX [xxx.xxxx]...................................................................................31

TXLEVEL [–20 to +6, AUTO]..........................................................32

UNIT [10000...65000]......................................................................32

5.0 TROUBLESHOOTING .............................................................. 32

6.0 TECHNICAL REFERENCE....................................................... 35

ii MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

5.1 LED Indicators ................................................................................32

5.2 Event Codes ...................................................................................33

Checking for Alarms—STAT command...........................................33

Major Alarms vs. Minor Alarms.......................................................33

Event Code Definitions ...................................................................34

6.1 MDS 4710A/C/M and 9710A/C/M/T Transceiver Specifications ....35

6.2 Helical Filter Adjustment ................................................................36

6.3 Performing Network-Wide Remote Diagnostics ... .... ... ... ... ... .... ......37

6.4 User-Programmable Interface Output Functions ...........................39

6.5 Upgrading the Radio’s Software ....................................................40

6.6 External Orderwire Module ............................................................41

Installation.......................................................................................41

Operation........................................................................................42

6.7 dBm-Watts-Volts Conversion Chart ................................................43

7.0 GLOSSARY OF TERMS ........................................................... 44

GE MDS, LLC reserves its right to correct any errors and omissions in this publication.

Revision 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 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 on the GE MDS Web site at www.microwavedata.com.

ISO 9001 Registration

GE MDS adheres to this internationally accepted quality system standard.

MDS Quality Policy Statement

We, the employees of GE MDS, LLC, 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 customers.

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 industry leaders.

• Commitment to continuous improvement and employee involvement.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual iii

Antenna Installation Warning

RF Exposure

Separation distances required for FCC RF Exposure compliance

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, ensure the

transmitter has been disabled.

Output is measured at the antenna terminal of the transmitter. The antenna(s) used for this transmitter must be fixed-mounted on outdoor permanent structures to provide the minimum separation distances described in this filing for satisfying RF exposure compliance requirements. When applicable, RF exposure compliance may need to be addressed at the time of licensing, as required by the responsible FCC Bureau(s), including antenna co-location requirements of §1.1307(b)(3).

2. Typically, the antenna connected to the transmitter is a directional

(high gain) antenna, fixed-mounted on the side or top of a building, or on a tower. Depending upon the application and the gain of the antenna, the total composite power could exceed 200 watts EIRP. The antenna location should be such that only qualified technical personnel can access it, and that under normal operating conditions no other person can touch the antenna or approach within 3.05 meters of the antenna.

Antenna Gain vs. Recommended Safety Distance

(MDS 4710 Series)

Antenna Gain (MDS 4710 Series)

0–5 dBi 5–10 dBi 10–16.5 dBi

Minimum RF Safety Distance

Antenna Gain vs. Recommended Safety Distance

Minimum RF Safety Distance

0.79 meter 1.41 meters 3.05 meters

(MDS 9710 Series)

Antenna Gain (MDS 9710 Series)

0–5 dBi 5–10 dBi 10–18.65 dBi

0.53 meter 0.94 meter 2.6 meters

FCC Part 15 Notice

The MDS 4710 AND 9710 transceivers licensed under Part 15 of the FCC Rules. (MDS 4710, Part 90.210, 403–512 MHz; MDS 9710, Part 101.101, 928–960 MHz) Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This device is specifically designed to be used under Section 15.247 of the FCC Rules and Regulations. Any

iv MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

unauthorized modification or changes to this device without the express

EXPLOSION

HAZARD!

approval of Microwave Data Systems may void the user’s authority to operate this device. Furthermore, this device is intended to be used only when installed in accordance with the instructions outlined in this manual. Failure to comply with these instructions may also void the user’s authority to operate this device.

CSA/us Notice

This product is approved for use in Class 1, Division 2, Groups A, B, C & D Hazardous Locations. Such locations are defined in Article 500 of the National Fire Protection Association (NFPA) publication NFPA 70, otherwise known as the National Electrical Code.

The transceiver has been recognized for use in these hazardous locations by the Canadian Standards Association (CSA) which also issues the US mark of approval (CSA/US). The CSA Certification is in accordance with CSA STD C22.2 No. 213-M1987.

CSA Conditions of Approval: The transceiver is not acceptable as a stand-alone unit for use in the hazardous locations described above. It must either be mounted within another piece of equipment which is certified for hazardous locations, or installed within guidelines, or conditions of approval, as set forth by the approving agencies. These conditions of approval are as follows:

• The transceiver must be mounted within a separate enclosure which is suitable for the intended application.

• The antenna feedline, DC power cable and interface cable must be routed through conduit in accordance with the National Electrical Code.

• Installation, operation and maintenance of the transceiver should be in accordance with the transceiver's installation manual, and the National Electrical Code.

• Tampering or replacement with non-factory components may adversely affect the safe use of the transceiver in hazardous locations, and may void the approval.

• A power connector with screw-type retaining screws as supplied by GE MDS must be used.

Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

Refer to Articles 500 through 502 of the National Electrical Code (NFPA 70) for further information on hazardous locations and approved Division 2 wiring methods.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual v

Distress Beacon Warning

In the U.S.A., the 406 to 406.1 MHz band is reserved for use by distress beacons. Since the radio described in this manual is capable of transmitting in this band, take precautions to prevent the radio from transmitting between 406 to 406.1 MHz in U.S. applications.

ESD Notice

To prevent malfunction or damage to this radio, which may be caused by Electrostatic Discharge (ESD), the radio should be properly grounded by connection to the ground stud on the rear panel. In addition, the installer or operator should follow proper ESD precautions, such as touching a grounded bare metal object to dissipate body charge, prior to adjusting front panel controls or connecting or disconnecting cables on the front or rear panels.

Environmental Information

The equipment that you purchased has required the extraction and use of natural resources for its production. Improper disposal may contaminate the environment and present a health risk due to hazardous substances contained within. To avoid dissemination of these substances into our environment, and to diminish the demand on natural resources, we encourage you to use the appropriate recycling systems for disposal. These systems will reuse or recycle most of the materials found in this equipment in a sound way. Please contact MDS or your supplier for more information on the proper disposal of this equipment.

Battery Disposal–This product may contain a battery. Batteries must be disposed of properly, and may not be disposed of as unsorted municipal waste in the European Union. See the product documentation for specific battery information. Batteries are marked with a symbol, which may include lettering to indicate cadmium (Cd), lead (Pb), or mercury (Hg). For proper recycling return the battery to your supplier or to a designated collection point. For more information see:

www.weeerohsinfo.com.

vi MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

1.0 GENERAL

DIAGNOSTICS

CONNECTOR (RJ-11)

ANTENNA CONNECTOR

(TYPE N)

13.8 VDC POWER CONNECTOR

SERIAL NUMBER

LABEL

EXTERNAL

INTERFACE

CONNECTOR

(DB-25)

LED INDICATORS (4)

1.1 Introduction

This guide presents installation and operating instructions for the MDS 4710A/9710A and the MDS 4710C/9710C Series (400/900 MHz) digital radio transceivers.

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 online transaction processing applications. They use microprocessor control and Digital Signal Processing (DSP) technology to provide highly reliable communications under adverse conditions.

Figure 1. Transceiver Connectors and Indicators

Modulation and demodulation is accomplished using Digital Signal Processing (DSP). DSP adapts to differences between components from unit to unit, and ensures consistent and repeatable performance in ambient temperatures from –30 to +60 degrees Celsius. The use of Digital Signal Processing eliminates the fluctuations and variations in modem operation that degrade operation of analog circuits.

The transceiver is designed for trouble-free operation with data equipment provided by other manufacturers, including Remote Terminal Units (RTUs), flow computers, lottery terminals, automatic teller machines, programmable logic controllers, and others.

NOTE: Some features are not available on all radios, based on the

options purchased and the applicable regulatory constraints for the region in which the radio operates.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 1

1.2 Applications



I D

I A

1 3 . 8

V D C



HOST SYSTEM

REMOTE RADIO

SWC OFF

RTU



I D I

A G

1 3 . 8

V D C



I D

I A

1 3 . 8

V D C



I D

I A

1 3 . 8

V D C



I D

I A

1 3 . 8

V D C



RTU

MDS MASTER

STATION

CONTINUOUSLY

KEYED

REMOTE RADIO

SWC OFF

REMOTE RADIO

SWC OFF

REMOTE RADIO

SWC OFF

REMOTE RADIO

SWC OFF

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. A MAS network provides communication 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, however, a radio system consists of many widely separated remote radios. A point-to-multipoint or SCADA (Supervisory Control and Data Acquisition) system might be utilized for automatic, remote monitoring of gas wells, water tank levels, electric power distribution system control and measurement, and so on.

The radio system can replace a network of remote monitors currently linked to a central location via leased telephone line. At the central office of such a system, there is usually a large mainframe computer and a way to switch 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, a desirable alternative is to replace the phone line with a radio path.

2 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Figure 2. Typical MAS Point-to-Multipoint Network

Point-to-Point System

REMOTE

MASTER

HOST

COMPUTER

RTU

Where permitted, the transceiver can also be used in a point-to-point system. A point-to-point system consists of two radios, one serving as a master and the other as a remote (Figure 3). This system provides a simplex or half-duplex communication link for the transfer of data between two locations.

Invisible place holder

Figure 3. Typical Point-to-Point Link

Continuously-Keyed versus Switched-Carrier Operation

Continuously-Keyed operation means the master station transmitter is always keyed and an RF carrier is always present, even when there is no data to send. The master station is always simultaneously transmitting and listening. Use different frequencies to transmit and receive. This is the method used in many MAS systems, as is shown in the typical system in Figure 2. This is network arrangement useful for high-speed polling applications.

NOTE: MDS 4710/9710 remotes do not support full-duplex operation.

Switched-Carrier operation is a half-duplex mode where the master station transmitter is keyed to send data and unkeyed to receive. The transceiver uses different frequencies for transmit and receive. This prevents different remotes from interfering with each other, making it easier to implement SCADA protocols. This mode results in slower polling times than a Continuous-Keyed master due to the keying time for the master and squelch opening time for the remote.

Additional information:

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 3

• Remotes always operate in switched-carrier mode, but can receive data from a master that operates in either switched-carrie r or continuously-keyed modes.

• A single-frequency system cannot utilize a continuously keyed master.

• An advantage of a continuously-keyed master is that it provides a constant signal source to remotes that require a constant Data Carrier Detect signal.

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. Simplex mode results in slower polling because the TX synthesizer must move off the RX channel to receive, and back to transmit.

Single-frequency operation is useful for peer-to-peer communication using omni-directional antennas with radios in close proximity to each other.

1.3 Model Number Codes

The radio model number is printed on the end of the radio enclosure and provided through the software command MODEL (Page 28). It provides key information about how the radio was configured when it was shipped from the factory. This number is subject to many variations depending on what options are installed, and in which country the product is used. Contact GE MDS if you have questions on the meaning of the code.

1.4 Contents of Standard Shipping Packages

Table 1 and Table 2 list the content of routine shipments of

MDS 4710/9710 transceivers. The contents might be modified to reflect customer requirements specified at the time the order was placed.

Table 1. Standard—Accessories (Supplied with All Orders)

Item Description GE MDS Part Number

Transceiver Power Cable Assembly 12 Vdc, (UL-Approved)

Cable, TELCO-Type, 84", RJ12 to RJ12 03-2198A05

Radio Configuration Software for Windows OS 03-3156A01

Installation & Operation Guide 05-3305A01

Connector, RJ-11 to DB-9 (Female) 73-2434A02

Table 2. Items Supplied with Diagnostic Option

Item Description GE MDS Part Number

InSite 6 Network Diagnostics Software (CD-ROM) 03-3533A01

InSite Network Diagnostics Manual 05-3467A01

03-1846A02

4 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

1.5 Accessories

The transceiver can be used with one or more of the accessories listed in

Table 3. Contact GE MDS for ordering information.

Table 3. Optional Accessories for MDS 4710/9710 Transceivers

Accessory Description

Power Supply Kit Provides nominal 13.8 Vdc from a

Hand-Held Terminal Kit (HHT)

RTU Simulator Test unit that simulates data from a

Orderwire Module External device that allows temporary

Orderwire Handset Used with Orderwire Module (above)

RJ-11 to DB-9 adapter Used to connect a PC to the radio’s

EIA-232 to EIA-422 Converter Assembly

Radio Configuration Software

120 Vac power source. Includes DC cable for transceiver.

Terminal that plugs into the radio for programming, diagnostics and control. Includes carrying case and cable set.

remote terminal unit. Comes with polling software that runs on a PC. Useful for testing radio operation.

voice communication. Useful during setup and testing of the radio system.

Standard Handset

Handset with PTT

DIAG (Diagnostics) port

External adapter plug that converts the radio’s DATA INTERFACE connector to EIA-422 compatible signaling.

Provides diagnostics of the transceiver (Windows-based PC required).

GE MDS P/N

01-3682A01

02-1501A01

03-2512A01

02-1297A01

12-1307A01

12-1307A02

03-3246A01

03-2358A01

03-3156A01

2.0 INSTALLATION

There are three main requirements for installing the transceiver:

• Adequate and stable primary power

• A good antenna system, and the correct data connections between the transceiver, and

• The data device.

Figure 4 shows a typical remote station arrangement.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 5

Invisible place holder

REMOTE TERMINAL UNIT

ANTENNA SYSTEM

LOW-LOSS FEEDLINE

RADIO

TRANSCEIVER

13.8 VDC

2.5 A (MINIMUM) POWER SUPPLY

13.8 VDC POWER

CABLE

Figure 4. Typical Remote Station Arrangement

2.1 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 feedline for the station. Point directional antennas in the direction of the associated network’s Master Station.

3. 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 might require only the use of Pin 2 (Transmit Data—TXD), Pin 3 (Received Data—RXD) and Pin 7 (Signal Ground). The radio can be keyed by using the

Additional connections might be required for some installations. Refer to the complete list of pin functions provided in Table 6 on

Page 11.

DATAKEY command.

6 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

4. Measure and install the primary power for the radio. The red wire on

CAUTION

POSSIBLE

EQUIPMENT

DAMAGE

ENTER

the GE MDS-provided power cable is the positive lead; the black is negative.

Only use the MDS 4710/9710 radio transceivers in negative-ground systems.

Connection to a positive-ground system or an accidental reversal of the power leads can damage the transceiver.

5. Set the radio configuration. In most cases, the transceiver requires only minimal software configuration. The selections that must be made for new installations are:

• Transmit frequency (“TX [xxx.xxxx]” on Page 31)

• Receive frequency (“RX [xxx.xxxx]” on Page 29)

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.

6. Connect a hand-held terminal (HHT) to the DIAG (diagnostic) connector. When the HHT beeps, press to receive the ready “>” prompt.

7. Set the operating frequencies using the TX xxx.xxxx (transmit) and RX

xxx.xxxx

(receive) commands.

Press after each command. After programming, the HHT reads PROGRAMMED OK to indicate successful entry.

2.2 Transceiver Mounting

NOTE: To prevent moisture from entering the radio, do not mount the

radio with the cable connectors pointing up. Also, dress all cables to prevent moisture from running along the cables and into the radio.

Figure 5 shows the mounting dimensions of the transceiver.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 7

Invisible place holder

1. 75

4. 44

C M

ALTERNATE

POSITION

7.25 in.

184 mm

2.75 in.

70 mm

8.5 in.

216 mm

6.63 in.

168 mm

5.625 in. 143 mm

2.0 in.

50 mm

2.25 in.

57 mm

CAUTION

POSSIBLE

EQUIPMENT

DAMAGE

Figure 5. Transceiver Mounting Dimensions

Using screws longer than 1/4 inch (6 mm) to attach the brackets to the radio might damage the internal PC board. Use only the supplied screws.

8 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

2.3 Antennas and Feedlines

Antennas

The transceiver can be used with a number of antenna styles. The exact style depends on the physical size and layout of the radio system. A directional Yagi (Figure 6) or corner reflector antenna is generally rec- ommended at remote sites to minimize interference to and from other users. Antennas of this type are available from several manufacturers.

Invisible place holder

Figure 6. Typical Yagi Antenna (mounted to mast)

Feedlines

The selection of antenna feedline is very important. Avoid poor quality cables as they will result in power losses that can reduce the range and reliability of the radio system.

Table 4 and Table 5 show the losses that will occur when using various

lengths and types of cable at 400 and 960 MHz. Keep the cable as short as possible to minimize signal loss.

Table 4. Length vs. Loss in Coaxial Cables at 400 MHz

10 Feet

Cable Type

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

(3.05 Meters)

50 Feet

(15.24 Meters)

100 Feet

(30.48 Meters)

500 Feet

(152.4 Meters)

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 9

Table 5. Length vs. Loss in Coaxial Cables at 960 MHz

10 Feet

Cable Type

RG-8A/U 0.85 dB 4.27 dB 8.54 dB 42.70 dB

1/2 inch HELIAX

7/8 inch HELIAX

1-1/4 inch HELIAX

1-5/8 inch HELIAX

(3.05 Meters)

0.23 dB 1.15 dB 2.29 dB 11.45 dB

0.13 dB 0.64 dB 1.28 dB 6.40 dB

0.10 dB 0.48 dB 0.95 dB 4.75 dB

0.08 dB 0.40 dB 0.80 dB 4.00 dB

50 Feet

(15.24 Meters)

100 Feet

(30.48 Meters)

500 Feet

(152.4 Meters)

2.4 Power Connection

The transceiver is compatible with any well-filtered 10.5 to 16 Vdc power source. The power supply should be capable of providing at least

2.5 A of continuous current. The red wire on the power cable is the positive lead; the black is nega-

tive.

NOTE: The radio is designed for use only in negative ground systems.

2.5 Safety/Earth Ground

To minimize the chances of damage to the transceiver and connected equipment, a good safety ground is recommended which bonds the antenna system, the radio transceiver, power supply, and connected data equipment to a single-point ground. Normally, the transceiver is adequately grounded if the GE MDS mounting brackets are used to secure the radio to a well-grounded metal surface.

If the transceiver is not mounted to a grounded surface, connect a safety ground to the transceiver case. A ground can be connected to one of the four screws on the bottom of the transceiver. Do not use any of the four screws that hold together the upper and lower parts of the transceiver case.

Connect all rack equipment and associated hardware grounds to the building’s ground system for the primary power. The objective is to create a single-point ground system, keeping all grounds leads as short as possible.

To prevent damage, provide a good ground connection for the equipment connected to the

INTERFACE connector.

Finally, use lightning protectors where the antenna transmission lines enter the building. Bond them to the tower ground, if it is nearby.

10 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

2.6 Data Interface Connections

CAUTION

USE ONLY

REQUIRED

PINS

Connect the transceiver’s DATA INTERFACE connector to an external DTE data terminal that supports the EIA-232 (formally RS-232) format. The transceiver supports autobaud asynchronous data rates of up to 19200 bps. The data rate at the DATA INTERFACE connector might differ from the data rate used over the air.

Table 6 lists and describes each pin on the DATA INTERFACE connector.

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 can result if improper connections are made. Typical applications require the use of only Pins 1 through 8 for EIA-232 signaling.

Table 6. DATA INTERFACE Connector Pinouts

Pin Number

1--Protective Ground. Connects to ground (negative supply

2INTXD—Transmitted Data. Accepts TX data from the

3OUTRXD—Received Data. Outputs received data to the

4INRTS—Request-to-Send Input. Keys the transmitter when

5OUTCTS—Clear-to-Send Output. Goes logic high after the

6OUTDSR—Data Set Ready. Provides a +6 Vdc DSR signal

7--Signal Ground. Connects to ground (negative supply

8OUTDCD—Data Carrier Detect. Goes to logic high when the

9INTransmit Audio Input. Connects to the audio output of an

10 OUT RUS—Receiver Unsquelched Sensor. Not used in most

11 OUT Receive Audio Output. Connects to the audio input of an

12 IN Radio In hib it (Sle e p). A ground on this pin places the

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 11

Input/ Output Pin Description

potential) on the radio’s PC board and chassis.

connected device.

RTS is at logic high.

programmed CTS delay time has elapsed (DCE) or keys an attached radio when RF data arrives (CTS KEY).

through a 2.5 k resistor.

potential) at radio’s PC board.

modem detects a data carrier from the master station.

external (AFSK) modem. The input impedance is 600 . Use Pin 7 for the modem’s return lead.

installations, but is available as a convenience. Provides +8 Vdc through a 1 k resistor whenever the receiver squelch is open, and drops to less than 1 Vdc when the squelch is closed.

external (AFSK) modem. The output impedance is 600 , and the level is factory set to suit most installations. Use Pin 7 for the modem’s return lead.

radio in sleep mode. It turns off most circuits in the radio, including transmit, receive, modem and diagnostic functions. This allows for greatly reduced power consumption, yet preserves the radio’s ability to be quickly brought online.

Table 6. DATA INTERFACE Connector Pinouts (Continued)

Pin Number

13 -- Do not connect—Reserved for future use.

14 IN PTT—Push-to-Talk. This line is used to key the radio with

15 -- User-Programmable Output 2—EIA-232-compatible

16 IN PTT

17 -- Do not connect—Reserved for future use.

18 OUT Accessory Power. Unregulated Output. Provides a

19 OUT 9.9 Vdc Regulated Output. Provides a source of

20 -- Do not connect—Reserved for future use.

21 OUT RSSI—Received Signal Strength Indication. Connect a

22 -- User-Programmable Output 1—CMOS-compatible

23 IN Diagno stic Channel Enable. A ground on this pin causes

24 -- Do not connect—Reserved for future use.

25 OUT Alarm. A logic low (less than 0.5 Vdc) on this pin indicates

Input/ Output Pin Description

an active-high signal of +5 Vdc.

output controllable though GE MDS’ InSite NMS program.

See “User-Programmable Interface Output Functions” on Page 39 for details.

—Push to Talk. This line is used to key the radio with

an active-low signal of 0 Vdc.

source of input power for low current accessories. Excessive drain on this connection trips the self-resetting fuse F1 on the transceiver PC board. The voltage at this pin matches the input voltage to the transceiver.

regulated voltage at 100 mA for low power accessories.

DC voltmeter to this pin to read the relative strength of the incoming signal. Figure 8 on Page 15 shows RSSI vs. DC voltage.

output controllable though GE MDS’ InSite NMS program.

See “User-Programmable Interface Output Functions” on Page 39 for details.

the radio’s microcontroller to open the DB-25 DATA INTERFACE for diagnostics and control instead of the normal RJ-11 DIAG connection.

normal operation. A logic high (greater than 4 Vdc) indicates that some alarm condition is present. This pin can be used as an alarm output, provided the internal series resistance of 1 k is considered.

2.7 Using the Radio’s Sleep Mode

In some installations, such as at solar-powered sites, use Sleep Mode to keep the transceiver’s power consumption to an absolute minimum. In Sleep Mode, power consumption is reduced to less than 15 mA (nominal), yet preserves the radio’s ability to be brought online quickly.

All normal functions are suspended while the radio is in Sleep Mode. The PWR LED is off, except for a quick flash every 5 sec.

12 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Enable Sleep Mode through RTU control by asserting a ground on Pin

DIODE

3.3 k

RESISTOR

RS-232 INPUT

PIN 12

RADIO’S DB-25

CONNECTOR

PIN 12

NOTE: USE SWITCHING TYPE DIODES (FOR EXAMPLE, 1N914)

12 of the radio's DATA INTERFACE connector. When Pin 12 is opened, the radio will be ready to receive data after a delay period that varies with modem type. With MODEM NONE, the delay will be less than 75 ms. Digital modems will typically require an additional 60 to 100 ms to resceive data when receiving a continuous keyed master station. This additional delay is reduced to less than 20 ms when receiving a switch-keyed master station.

NOTE: GE MDS recommends against applying RS-232 voltages to

Pin 12 of the radio’s DB 25 connector. Only apply ground or +5 Vdc to this pin. GE MDS recommends that you connect the radio and RTU using the circuit shown in Figure 7.

For information on using an ABB Totalflow meter to control the radio’s sleep mode, refer to GE MDS Product Bulletin PB-0904.

Figure 7. RTU to Pin 12 Interconnect Circuit

System Example

The following example describes Sleep Mode implementation in a typical system. Use this information to configure a system that meets your particular needs.

Sleep Mode Example:

You need communication to each remote site only once per hour. Program the RTU to raise an RS-232 line once each hour (DTR, for example), and wait for a poll and response before lowering it again. Connect this line to Pin 12 of the radio’s DATA INTERFACE connector. This allows each RTU to be polled once per hour with a significant savings in power consumption.

Invisible place holder

3.0 OPERATION

In-service operation of the transceiver is completely automatic. Once the unit is properly installed and configured, operator actions are limited to observing the front panel LED status indicators for proper operation.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 13

If all parameters are correctly set, start radio operation by following

PWR DCD TXD RXD

these steps:

1. Apply DC power to the transceiver.

2. Observe the LED status panel for the proper indications (Table 7).

3. If not done earlier, refine the antenna heading of the station to maximize the received signal strength (RSSI) from the master station.

Use the RSSI command from an HHT connected to the radio’s DIAG connector. See Section 4.0, TRANSCEIVER PROGRAMMING on

Page 15. This can also be done with a DC voltmeter as described in

Section 3.2, RSSI Measurement (Page 14).

3.1 LED Indicators

Table 7 describes the function of each status LED.

Table 7. 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 5 seconds—Radio is in Sleep mode.

DCD • Flashing—Indicates the radio is receiving intermittent data frames.

• Continuous—Radio is receiving a data signal from a continuously keyed radio.

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.

3.2 RSSI Measurement

As an alternative to using an HHT, the radio’s received signal strength (RSSI) can be read with a DC voltmeter connected to Pin 21 of the DATA

INTERFACE

received signal level and the DC voltage on Pin 21 of the

FACE

connector. (Note: Readings are not accurate for incoming signal

strengths above –50 dBm.)

connector. Figure 8 shows the relationship between

DATA INTER-

14 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Invisible place holder

2.5

3.5

–110

–9

–70

–5

4.5

5.0

SIGNAL LEVEL (dBm)

+DC VOLTS (PIN 21)

Figure 8. RSSI vs. Vdc (Typical)

4.0 TRANSCEIVER PROGRAMMING

To program and control the transceiver, use the radio’s RJ-11 DIAG (Diagnostics) connector with a GE MDS Hand-Held Terminal (MDS P/N 02-1501A01). This section contains a reference chart (Table 9) and detailed descriptions for each user command.

NOTE: In addition to HHT control, Windows-based software is avail-

4.1 Hand-Held Terminal Connection & Startup

This section provides basic information for connecting and using the GE MDS Hand-Held Terminal. For more information about the terminal, refer to the instructions included with the HHT kit.

The steps below assume that the HHT is 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 were changed, refer to Section 4.2, Hand-Held Terminal Setup (Page 16) for setup details.

Follow these steps to connect the HHT:

1. Connect the HHT’s coiled cord to the DIAG (RJ-11) jack on the radio

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 15

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 software. Contact GE MDS for ordering information.

as shown in Figure 9. This automatically places the radio into the control and programming mode.

As an alternative, the DATA INTERFACE (DB-25) connector can be used for programming instead of the

DIAG jack. With this arrange-

ment, Pin 23 of the HHT cable must be grounded to enable the diagnostic channel (Table 6 on Page 11).

2. When the HHT is connected, it runs through a brief self-check, and

ENTER

ANTENNA

13.8 VDC

–

CTRL

–

)

(

SHIFT

ESC

BKSP

ACE

ENTER

SHIFT

CTRL

SPACE

FF1FFF

ends with a beep. After the beep, press to receive the ready “>” prompt.

Invisible place holder

Figure 9. Hand-Held Terminal Connected to the Transceiver

4.2 Hand-Held Terminal Setup

Perform the following steps to re-initialize an HHT for use with the transceiver. These steps might be required if the HHT was previously used with a different radio, or if the HHT default settings were inadvertently altered.

1. Plug the HHT into the DIAG connector. Enable the setup mode by pressing the , and keys in sequence. The display shown in Figure 10 appears.

Invisible place holder

16 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Figure 10. HHT Setup Display

2. The display shows the first of 15 menu items. To review settings,

CTRL/Z

ENTER

SPACE

ENTER

press the key. This controls the NEXT function. To change parameter settings, press the key. This controls the ROLL func-

tion.

3. Configure the HHT as listed in Table 8.

Table 8. HHT Operational Settings

Parameter Setting Parameter Setting

Re-init HHT 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

NOTE: In rare cases, it might be necessary to reset the HHT to its

factory defaults before any configuration can be performed. To do this, hold the and keys simultaneously,

while plugging in the power cable into the HHT.

4.3 Keyboard Commands

Table 9 on Page 19 is a reference chart of software commands for the

transceiver. Programmable information is shown in brackets [ ] following the command name. See Section 4.4, Detailed Command

Descriptions (Page 21) for detailed command descriptions.

Entering Commands

To enter a command, type the command, and then press the key.

For programming commands:

1. Type the command.

2. Press the key. The appropriate information or values follow.

3. Press the key.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 17

Additional points to remember when using the HHT:

SHIFT

ESC/BKSP

• Use the key to access numbers; press again to return to letter mode.

• Use the key to edit information or command entries.

• The flashing square cursor ( ) indicates that Letter Mode is selected.

• The flashing superscript rectangular cursor ( ) indicates that Number Mode is selected.

18 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Error Messages

Below are possible error messages encountered when using the HHT:

UNKNOWN COMMAND—The command was not recognized. Refer to the com-

mand 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 information.

COMMAND FAILED—The command was unable to successfully complete. This is

a possible 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 GE MDS.

TEXT TOO LONG—Response to OWN or OWM command when too many char-

acters are entered. Refer to the command description for command usage information.

NOT A VAILABLE—The entered command or parameter was valid, but it referred

to a currently unavailable choice. Refer to the command description for command usage information.

ACCESS DENIED—The command is unavailable to the user. Refer to the com-

mand descriptions for command information.

EEPROM FAILURE— The INIT command was unable to write to EEPROM. This

is a serious internal radio error. Contact GE MDS.

See Table 9 for a summary of the user commands.

Table 9. Command Summary

Command name Function

ALARM Details Page 21 Read current operating condition of radio. AMASK [0000 0000–FFFF

FFFF] Details Page 21

ASENSE [HI/LO] Details

Page 23

BAUD [xxxxx abc] Details

Page 24

BUFF [ON, OFF] [xxx]

Details Page 24

CTS [0–255] Details Page

CKEY [ON–OFF] Details

Page 25

DATAKEY [ON, OFF]

Details Page 25

DEVICE [DCE, CTS KEY]

Details Page 25

DKEY Details Page 26 Dekey the radio (transmitter OFF). This is

DIN [ON/OFF] Details Page

Set or display hex code identifying which events trigger an alarm.

Set or display the state of the alarm output signal to ACTIVE HI or ACTIVE LO.

Set or display the DATA INTERFACE data rate and control bits.

Enables or disables the internal radio data buffer.

Set or display the Clear-to-Send delay in seconds.

Enables or disables the continuously keyed mode. Note: Remotes cannot receive when keyed.

Enables or Disables key-on-data mode (ON = key-on-data or RTS, OFF = key-on-RTS).

Set/display device mode.

generally a radio test command.

Configures local diagnostic link protocol.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 19

Table 9. Command Summary (Continued)

Command name Function

DTYPE [NODE/ROOT]

Details Page 26

DUMP Details Page 26 Display all programmable settings. HREV Details Page 27 Display the Hardware Revision level. INIT Details Page 27 Set radio parameters to factory defaults. INIT [4710/9710] Details

Page 27

INIT [4720/9720] Details

Page 27

KEY Details Page 28 Key the radio (transmitter ON). This is generally a

MODEL Details Page 28 Display the model number of the radio. MODEM [xxxx, NONE]

Details Page 28

(Diagnostics) Sets up a radio as a root or node

radio.

Configure radio for use outside of P-20 chassis.

Restores certain transceiver defaults changed by

the INIT x720 command. Configure radio for service within a P-20

redundant/protected chassis.

radio test command.

Set the modem characteristics of the radio.

OWM [XXX...] Details Page

OWN [XXX...] Details Page

PTT [0–255] Details Page

PWR [20–37] Details Page

RSSI Details Page 29 Display the Received Signal Strength Indication. RTU [ON/OFF/0-80] Details

Page 29

RX [xxx.xxxx] Details Page

RXLEVEL [–20 to +6]

Details Page 30

RXTOT [NONE, 1-1440]

Details Page 30

SCD [0-255] Details Page

SER Details Page 30 Display the radio serial number. SHOW [DC, PORT, PWR]

Details Page 30

SREV Details Page 31 Display the Software Revision Level. STAT Details Page 31 Display radio status and alarms.

Set or display the owner’s message.

Set or display the owner’s name.

Set or display the Push-to-Talk delay in milliseconds.

Set or display the transmit power setting.

Re-enables or disables the radio’s internal RTU simulator and sets the RTU address.

Set or display receiver frequency.

Set or display the receive audio input level.

Set or display the value of the receive time-out timer.

Set or display the Soft-Carrier Dekey delay in milliseconds.

Display the DC voltages, diagnostics port, and transmit power level.

TEMP Details Page 31 Display the internal temperature of the radio in

TOT [1-255, ON, OFF]

20 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Details Page 31

degrees C.

Set or display the Time-out Timer delay in seconds.

Table 9. Command Summary (Continued)

Command name Function

TX [xxx.xxxx] Details Page

TXLEVEL [–20 to +6,

AUTO] Details Page 32

Set or display the transmit frequency.

Set or display the transmit audio input level.

UNIT [10000...65000]

Details Page 32

Set or display the transceiver’s unit address.

4.4 Detailed Command Descriptions

The only critical commands for most applications are transmit and receive frequencies (RX xxx.xxxx, TX xxx.xxxx). However, proper use of the additional commands allows you to tailor the transceiver for a specific use, or conduct basic diagnostics on the radio. This section provides more detailed information for the user commands previously listed in Table 9 (Page 19).

In many cases, the commands shown here can be used in two ways:

• You can type only the command name to view the currently programmed data.

• 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, acceptable programming variables, if any, are shown in brackets following the command name.

ALARM

The ALARM command displays a summary of the radio’s current operating condition. An eight-digit hexadecimal code is presented that can be decoded as described in “Major Alarms vs. Minor Alarms” on Page

33.

AMASK [0000 0000–FFFF FFFF]

Alarm Mask The AMASK command displays or sets a mask indicating which events

cause the alarm output signal to be active. Normally, the mask is

, meaning that any of the 32 possible events can activate the alarm

FFFF

output signal. 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.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 21

The eight-digit hexadecimal number used as the command parameter specifies 0 to 32 events that can trigger the external alarm output (see Table 10 below for a list of events). The hex value for the mask corresponds to the hex value for the STAT command (Page 31). Each bit that is a ‘1’ identifies an alarm condition that can trigger the external output.

Table 10. Alarm Event Codes and Hex/Binary Values

Event Number Text Message

00 Network address 8000 0000 1000 0000 0000 0000 0000 0000 0000 0000 01 Hardware mismatch 4000 0000 0100 0000 0000 0000 0000 0000 0000 0000 02 Model number not programmed 2000 0000 0010 0000 0000 0000 0000 0000 0000 0000 03 Authorization fault 1000 0000 0001 0000 0000 0000 0000 0000 0000 0000 04 Synthesizer out-of-lock 0800 0000 0000 1000 0000 0000 0000 0000 0000 0000 05 Reserved 06 Peripheral fault or RAM fault 0200 0000 0000 0010 0000 0000 0000 0000 0000 0000 07 Voltage regulator fault detected 0100 0000 0000 0001 0000 0000 0000 0000 0000 0000 08 Radio not calibrated 0080 0000 0000 0000 1000 0000 0000 0000 0000 0000 09 DSP download fault 0040 0000 0000 0000 0100 0000 0000 0000 0000 0000 10 NVRAM fault 0020 0000 0000 0000 0010 0000 0000 0000 0000 0000 11 Reserved 12 Receiver time-out 0008 0000 0000 0000 0000 1000 0000 0000 0000 0000 13 Time out command 0004 0000 0000 0000 0000 0100 0000 0000 0000 0000 14 Reserved 15 Output power fault 0001 0000 0000 0000 0000 0001 0000 0000 0000 0000 16 Unit address not programmed 0000 8000 0000 0000 0000 0000 1000 0000 0000 0000 17 Data parity error 0000 4000 0000 0000 0000 0000 0100 0000 0000 0000 18 Data framing error 0000 2000 0000 0000 0000 0000 0010 0000 0000 0000 19 Reserved 20 Configuration error 0000 0800 0000 0000 0000 0000 0000 1000 0000 0000 21 Running on battery 0000 0400 0000 0000 0000 0000 0000 0100 0000 0000 22 Standby missing 0000 0200 0000 0000 0000 0000 0000 0010 0000 0000 23 Standby has alarms 0000 0100 0000 0000 0000 0000 0000 0001 0000 0000 24 Power output faults 0000 0080 0000 0000 0000 0000 0000 0000 1000 0000

25 6-Volt regulator output not in valid

range

26 DC input power is not in valid

range

27 LNA current fault 0000 0010 0000 0000 0000 0000 0000 0000 0001 0000

Alarm Code (hex)

0000 0040 0000 0000 0000 0000 0000 0000 0100 0000

0000 0020 0000 0000 0000 0000 0000 0000 0010 0000

32-bit Binary Equivalent

22 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Table 10. Alarm Event Codes and Hex/Binary Values

Event Number Text Message

28 Total current fault 0000 0008 0000 0000 0000 0000 0000 0000 0000 1000 29 Power output control 0000 0004 0000 0000 0000 0000 0000 0000 0000 0100 30 RSSI reading below -105 0000 0002 0000 0000 0000 0000 0000 0000 0000 0010

31 Internal temperature not in valid

range

Alarm Code (hex)

0000 0001 0000 0000 0000 0000 0000 0000 0000 0001

32-bit Binary Equivalent

The AMASK command is used to set or display which events cause the alarm output signal on pin 25 to be active. The default AMASK is FFFF FFFF (hexidecimal). Therefore, all major and minor alarms provide a logic high on pin 25. The first four hexidecimal values represent major alarms that provide a logic high on pin 25, and the next four hexidecimal values represent minor alarms. Converting the hexidecimal value to binary shows which bits are set in the AMASK. For example:

AMASK (default) = FFFF FFFF (hex)

=1111 1111 1111 1111 1111 1111 1111 1111 (binary)

Each bit represents a different major or minor alarm. The most significant 16 bits represent specific major alarms and the least significant 16 bits represent specific minor alarms. All major and minor alarms are set as the default AMASK. Use the AMASK command to reset any or all of these bits if alarm outputs for specific alarms are not desired. Table 10 provides a list of event codes.

To disable the alarm signal for a specific alarm, reset the bit associated to the specific alarm and convert back to hexidecimal.

ASENSE [HI/LO]

Alarm Sense The ASENSE command sets or displays the sense of the alarm output at

Pin 25 of the DATA INTERFACE connector. Entering the

active high or low. Entering the

ASENSE command alone shows whether the alarm output is

ASENSE command followed by HI or LO

resets the alarm output to active high or low.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 23

BAUD [xxxxx abc]

Data Interface Port Baud Rate

This command sets (or displays) the communication attributes for the

DATA INTERFACE port. It has no effect on the RJ-11 DIAG port.

The first parameter (xxxxx) is baud rate. Baud rate is specified in bits-per-second (bps) and must be set to 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 stop bit (Example: 9600 8N1).

NOTE: 7N1, 8O2, and 8E2 are invalid communication settings and are

not supported by the transceiver.

BUFF [ON, OFF] [xxx]

RX Data Buffer This command sets or displays the received data handling mode of the

radio. The command parameter is either ON or OFF. The default is ON. This command affects the timing of how received RF data is sent out from the DATA INTERFACE connector. Outgoing (transmitted) data is not affected by this command.

If data buffering is OFF, the radio operates with the lowest possible average latency. Data bytes are thus sent out the

DATA INTERFACE port

as soon as an incoming RF data frame is disassembled. Average and typical latency will both be below 10 ms, but idle character gaps might be introduced into the outgoing data flow.

If data buffering is

ON, the radio operates in Seamless Mode. Data bytes

will be sent over the air as quickly as possible, but the receiver buffers (stores) the data until enough bytes have arrived to cover worst-case gaps in transmission. This mode of operation is required for protocols such as MODBUS™ that do not allow gaps in their data transmission.

Seamless Mode (BUFF ON) is intended only for applications where the transmitter’s baud rate is greater than or equal to the receiver’s baud rate. Enforcement of this rule is left to the user.

In some rare cases, the default timing parameters for Seamless Mode are not optimal. In these cases, the user might need to specify an exact delay time. To set a custom delay time, enter 1 and 255). Entering

BUFF xxx resets the default delay time.

BUFF xxx (xxx is a value between

24 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

CKEY [ON–OFF]

Key TX Continuously

The CKEY command enables or disables the continuously-keyed function of the radio. When CKEY is set to ON, the radio is continuously keyed and the Timeout Timer is disabled.

CTS [0–255]

Clear-to-Send Time The CTS (clear-to-send) command selects or displays the timer value

associated with the CTS line response. The command parameter ranges from 0 to 255 ms.

For DCE operation, the timer specifies how long to wait after the RTS line goes high, before the radio asserts CTS and the DTE transmits 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 through the

DATA INTERFACE port. A timer value of zero means that data is sent

through the data port without imposing a key-up delay. Other delays might be present based on selected radio operating commands.

DATAKEY [ON, OFF]

Key on Data Activity The DATAKEY command enables or disables the ability of the radio to key

the transmitter as data is received at the DATA INTERFACE connector. Asserting RTS keys the radio regardless of this command setting.

If DATAKEY is set to ON, the radio will key when a full data-character is received at the transceiver’s DATA INTERFACE connector. If DATAKEY is set to OFF, the radio needs to be keyed by asserting either the RTS or PTT signal, or with the

CKEY or KEY command.

DEVICE [DCE, CTS KEY]

Data Device Mode The DEVICE command controls or displays the device behavior of the

radio. The command parameter is either DCE or CTS KEY. In

DCE mode (the default setting), CTS will go high following RTS, sub-

ject to the CTS programmable delay time. If the

DATAKEY command is

set to ON, keying can be 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.

In CTS KEY mode, the transceiver is assumed to be controlling another radio. It will still key based on the RTS line, but the CTS line is used as a keyline control for the other radio. CTS is asserted immediately following the receipt of RF data, but data will not be sent out the DATA

INTERFACE

port until after the CTS programmable delay time has

expired. This gives the other radio time to key.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 25

DKEY

Unkey Transmitter This command deactivates the transmitter after it has been keyed with

the KEY command.

DIN [ON/OFF]

Digital Input When DIN ON is selected, the “not” PTT line (Pin 16 on the DB-25 con-

nector) is re-defined as a digital input for network-wide diagnostics.

See “User-Programmable Interface Output Functions” on Page 39 for

more information. The default is DIN OFF.

To change the diagnostic link, enter DLINK followed by one of the following baud rates: 1200, 2400, 4800, 9600, 19200 (default).

DLINK [ON/OFF/xxxx]

Diagnostic Link Use this command to configure the local diagnostic link protocol

required for network-wide diagnostics.

DLINK ON enables the diagnostic link. DLINK OFF disables the diagnostic

link.

Unit’s Diagnostics Type

Read Current Unit Profile

Modem TX Audio Pre-Emphasis

To change the diagnostic link, enter DLINK followed by one of the following baud rates: 1200, 2400, 4800, 9600, 19200 (default).

DTYPE [NODE/ROOT]

This command establishes the local radio as a root radio or node radio for network-wide diagnostics. Entering DTYPE NODE configures the radio as a node radio. Entering

DTYPE ROOT configures the radio as a root

radio. Entering the DTYPE command alone displays the current setting.

See “Performing Network-Wide Remote Diagnostics” on Page 37.

DUMP

This command displays all the programmed settings. The HHT display is too small to list all the command settings at one time. Therefore, this command is most useful if the command is issued from a computer or full-screen terminal.

EMP [ON/OFF]

This command displays or sets the TX pre-emphasis and RX De-Emphasis when the radio is operating with the analog mode and the radio’s MODEM is turned off (

MODEM NONE). It should match the other

radios in the system. The use of pre- and de-emphasis helps reduce the detrimental influence of high-frequency audio noise.

26 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

HREV

Hardware Revision This command displays the transceiver’s hardware revision level. If

nothing is displayed, the hardware revision level was not programmed by the factory.

INIT

Initialize EEPROM Defaults

Packaged Model Initialization

The INIT command is used to re-initialize the radio’s operating parameters to the factory defaults. This is helpful when trying to resolve configuration problems that might have resulted from the entry of one or more improper command settings. If you are unsure of which command setting caused the problem, this command allows you to return to a known working state. The following changes to the radio are made when

INIT is entered:

• CTS is set to 0

• DATAKEY is set to ON

• DEVICE is set to DCE

• PTT is set to 0

• SCD is set to 0

• TOT is set to 30 seconds and set to ON

• PWR is set to +37 dBm (5 watts)

All other commands stay in the previously established setting.

INIT [4710/9710]

This command sets the transceiver for “normal” operation outside the P-20 chassis by setting the following parameters to the values shown below:

Use this command to restore these three parameters to the standard transceiver defaults if it was used in a P20 package.

INIT [4720/9720]

This command sets the transceiver for service within a P-20 by setting the following parameters to the values shown below:

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 27

ASENSE ACTIVE HI AMASK FFFF FFFF RXTOT NONE (receive time-out timer disabled)

ASENSE ACTIVE LO AMASK FFFF 0000 RXTOT 20 (20 minute time-out timer)

(assert alarm output on all alarms)

(trigger on major alarms)

KEY

ENTER

TX Key This command activates the transmitter. See also the DKEY command.

MODEL

Model Number Code This command displays the radio’s model number code.

MODEM [xxxx, NONE]

Analog/Digital Modem Selection

This command selects the radio’s modem characteristics. For digital operation, enter operation, enter

9600 (MDS x710A) or 19200 (MDS x710C). For analog NONE.

When the MODEM is set to NONE, the analog TX Input and RX Audio outputs of the DATA INTERFACE are used to interface with the connected external modem. These levels must match the audio signal level requirements of the external modem. See “RXLEVEL [–20 to +6]” on Page 30 and “TXLEVEL [–20 to +6, AUTO]” on Page 32 for details on setting these levels.

OWM [XXX...]

Owner’s Message Use this command to display or program an owner’s message. To pro-

gram the owner’s message, type OWM then the message, followed by

To display the owner’s message, type OWM then . The owner’s message appears on the display.

OWN [XXX...]

Owner’s Name Use this command to display or program an owner’s name. To program

the owner’s name, type

OWN then the name, followed by .

To display the owner’s name, type OWN then . The owner’s name appears on the display.

PTT [0–255]

Push-to-Talk Delay Use this command to display or program the key-up delay in millisec-

onds. This timer specifies how long to wait after the radio receives a key signal

from either the PTT or RTS lines (on the ally keying the radio.

PWR [20–37]

TX RF Power Output Level

28 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

NOTE: This function might not be available, depending on certifica-

DATA INTERFACE), before actu-

tion requirements in a particular country.

Use this command to display or program the desired RF forward output

ENTER

power setting of the radio. The PWR command parameter is specified in dBm and can range from 20 to 37. The default setting is 37 dBm (5 W). To read the actual (measured) power output of the radio, use the SHOW

PWR command. A dBm-to-watts conversion chart is provided in

Section 6.7 (Page 43).

RSSI

Received Signal Strength Indicator

This command continuously displays the radio’s Received Signal Strength Indication (RSSI) in dBm units, until you press the key.

You can read incoming signal strengths from –50 dBm to –120 dBm.

NOTE: The RSSI samples the incoming signal for 1 to 2 sec before

providing an average reading to your computer terminal or HHT.

RTU [ON/OFF/0-80]

RTU Simulator This command enables or disables the radio’s internal RTU simulator,

which runs with GE MDS’ proprietary polling programs (poll.exe and rsim.exe). The internal RTU simulator is available whenever diagnostics is enabled in a radio. This command also sets the RTU address to which the radio will respond.

Use the internal RTU for testing system payload data or pseudo bit error rate testing. It can be helpful in isolating a problem to either the external RTU or the radio.

Use the RTU simulator in a polled environment for testing purposes. See GE MDS Publication 05-3467A01 for more information.

RX [xxx.xxxx]

Receive Frequency This command selects or displays the radio’s receive frequency in MHz.

The frequency step size is 6.25 kHz. Some models might be set to 5 kHz steps to match the frequencies of some band plans.

If the customer frequency is not programmed at the factory, a default frequency is programmed in the radio near the center of the frequency band.

NOTE: A large change in receive frequency (more than 5 MHz)

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 29

requires adjustment of the receiver helical filters for maximum performance and RSSI. See Section 6.2, Helical Filter Adjust-

ment (Page 36) for details.

RXLEVEL [–20 to +6]

ENTER

RX Audio Output Level

The RXLEVEL command selects or displays the receive output level present on Pin 11 of the DATA INTERFACE’s DB-25 connector. Use this function in

MODEM NONE mode with analog audio.

RXTOT [NONE, 1-1440]

Loss of RX Data Alarm Time

The RXTOT command selects 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 ranging from 0 to 255 resets the timer in minutes. Entering the

RXTOT command with a parameter

RXTOT

command with the parameter NONE disables the timer.

SCD [0-255]

Soft-Carrier Dekey This command displays or changes the soft-carrier dekey delay in milli-

seconds. This timer specifies how long to wait after the removal of the keying

signal before actually releasing the transmitter. A value of 0 ms unkeys the transmitter immediately after the removal of the keying signal.

Radio’s Serial Number

Show Power Settings

RX Signal-to-Noise Ratio

SER

This command displays the radio’s serial number as recorded at the factory.

SHOW [DC, PORT, PWR]

The SHOW command displays different types of information based on the command variables. The different parameters are:

DC—Display DC input/output voltages

•

• PORT—Display the connector port (RJ-11 or DB-25) that is active

for diagnostics and control.

• PWR—Display RF power output

SNR

This command continuously displays the signal-to-noise (SNR) ratio of the received signal expressed in dB, until you press the key. As

used in this guide, the SNR measurement is based upon the signal level following equalization for received frames.

The SNR is an indication of the received signal quality. The SNR indication ranges from 10 dB to 33 dB. A value of 10 dB represents a very poor signal. A value of 24 dB represents a very good signal.

30 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Using the SNR command causes the DIAG port to enter an update mode,

ENTER

and the SNR is updated and redisplayed every 2 sec. The SNR continuously updates until you press the key.

SREV

Software/Firmware Revision Level

This command displays the software revision level of the transceiver firmware.

STAT

Alarm Status 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 provided.

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. Detailed descriptions of event codes are provided in Table 11 on

Page 34.

TEMP

Internal Temperature

This command displays the internal temperature of the transceiver in degrees Celsius.

TOT [1-255, ON, OFF]

TX Timeout-Timer This command sets or displays the transmitter Time-out Timer value

(1–255 sec), as well as the timer status (

ON or OFF). 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 happens, you must command the radio back to an unkeyed state before a new keying command is accepted. The default timer value is 30 sec.

TX [xxx.xxxx]

TX Frequency This command selects or displays the radio’s transmit frequency in

MHz. The frequency step size is 6.25 kHz.

If the customer frequency is not programmed at the factory, a default frequency is programmed in the radio near the center of the frequency band.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 31

TXLEVEL [–20 to +6, AUTO]

TX Audio Input Level The TXLEVEL command selects or displays the transmit audio input level

expected on Pin 9 of the DATA INTERFACE’s DB-25 connector from an external modem present on Pin 11 of the

DATA INTERFACE’s DB-25

connector. This function is used in MODEM NONE mode with analog audio.

For optimum performance, set this command to match the external modem level. For example,

TXLEVEL –10. TXLEVEL AUTO also available.

This setting directly affects the TX Deviation. (Default: –10 dBm).

UNIT [10000...65000]

Unit Address The unit address is the radio’s unique identity for the network’s diag-

nostic activities. The default number is programmed by the factory to the last four digits of the serial number.

5.0 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 internal self-resetting fuse (4A). Remove primary power to reset.

• Secure connections (RF, data and power)

• An efficient and properly aligned antenna system with a good received signal strength of 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 4.0, TRANSCEIVER PROGRAMMING on Page 15).

• The correct interface between the transceiver and the connected data equipment (correct cable wiring, proper data format, timing, and so on).

5.1 LED Indicators

The LED status indicators are an important troubleshooting tool and should be checked whenever a problem is suspected. Table 7 on Page 14 describes the function of each status LED.

32 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

5.2 Event Codes

ENTER

When an alarm condition exists, the transceiver creates a code that can be read on an HHT connected to the DIAG port. These codes can help resolve many system difficulties. Refer to Table 11 (Page 34) 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 11).

Invisible place holder

Figure 11. HHT Display in Response to STAT Command

If an alarm does exist, a two-digit alarm code (00–31) is displayed and the event is identified as a Major or Minor Alarm. A brief description of the alarm is also provided.

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 hardware failure, or other abnormal condition that prevents (or seriously hampers) further operation of the transceiver. Major alarms generally indicate the need for factory repair. Contact GE MDS for further assistance.

Minor Alarms—report conditions that, under most circumstances, do not prevent transceiver operation. This includes out-of-tolerance conditions, baud rate mismatches, and so on. The cause of these alarms should be investigated and corrected to prevent system failure.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 33

Event Code Definitions

Table 11 contains a listing of all event codes reported by the transceiver.

Table 11. Event Codes

Event Code

01 Major Improper software detected for this radio model.

02 Major The model number of the transceiver is unprogrammed.

04 Major One or both of the internal programmable synthesizer loops is

06 Major An unrecoverable fault was detected on the auto-D chip. The

07 Major One or more of the radio’s internal voltage regulators is

08 Major The system is reporting that it has not been calibrated. Factory

09 -- Not used.

10 Major The internal microcontroller was unable to properly program

11 -- Not used.

12 Major Receiver time-out. No data received within the specified

13–15 -- Not used.

16 Minor Not used.

17 Minor A data parity fault is detected on the DATA INTERFACE

18 Minor A data framing error is detected on the DATA INTERFACE

19–24 -- Not used.

25 Minor The 5.6 V power regulator is out-of-tolerance. If the error is

26 Minor The DC input voltage is out of tolerance. If the voltage is too

27, 28 -- Not used.

31 Minor The transceiver’s internal temperature is approaching an

Event Class Description

reporting an out-of-lock condition.

radio will not receive data.

reporting a failure. The radio will not operate.

calibration is required for proper radio operation.

the system to the appropriate EEPROM defaults. A hardware problem might exist.

receiver time-out time.

connector. This usually indicates a parity setting mismatch between the radio and the RTU.

connector. This can indicate a baud rate mismatch between the radio and the RTU.

excessive, operation might fail.

far out of tolerance, operation might fail.

out-of-tolerance condition. If the temperature drifts outside of the recommended operating range, operation might fail.

34 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

6.0 TECHNICAL REFERENCE

6.1 MDS 4710A/C/M and 9710A/C/M/T Transceiver Specifications

GENERAL

Frequency Range*: MDS 4710A/C/M MDS 9710A/C/M/T

330–512 MHz 800–960 MHz

* with one or more sub-bands as permitted by regulatory agencies

Frequency Stability: ±1.5 ppm

RECEIVER

Maximum Usable Sensitivity: MDS x710A/T: –110 dBm at 1x10

MDS x710C: –105 dBm at 1x10 MDS x710M: –106 dBm at 1x10

Co-Channel Rejection: MDS x710A/M/T: –12 dB

MDS x710C: –18 dB

Adjacent-Channel Selectivity: 60 dB

Spurious-Response Rejection: 70 dB

Intermodulation Response Rejection: 65 dB

Spurious Conducted Emissions: –57 dBm (9 kHz to 1 GHz)

–47 dBm (1 GHz to 12.75 GHz)

Bandwidth: MDS x710A/M/T: 12.5 kHz

MDS x710C: 25 kHz

–6

BER

TRANSMITTER

Modulation Type: Binary CPFSK

Carrier Power: 0.1 W to 5 W

Carrier Power Accuracy: ±1.5 dB

Transmit Attack Time: 5 ms maximum

Transmit Release Time: 5 ms maximum

Duty Cycle: Continuous

Output Impedance: 50 

Frequency Stability: ±1.5 ppm

Channel Spacing: MDS x710A/M/T: 12.5 kHz

MDS x710C: 25 kHz

Adjacent Channel Transient Power: MDS x710A/M/T: –50 dBc

Transmitter Spurious Conducted Emissions: –36 dBm [73 dBc], 9 kHz to 1 GHz

Standby: –57 dBm, 9 kHz to 1 GHz

Intermodulation: –40 dBc

Time-Out Timer: 30 sec (Default), User selectable

Transmitter Keying: Data activated, or RTS

FCC Emission Designators: 11K2F1D, 11K2F2D, 11K2F3D (928–960 MHz)

MDS x710C: –40 dBc

–30 dBm [67 dBc], 1 GHz to 12.5 GHz

–47 dBm, 1 GHz to 12.5 GHz

11K2F1D (806–940 MHz) 11K0F1D, 11K2F2D, 11K2F3D (403–512 MHz)

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 35

FCC Identifiers: E5MDS9710N (928–960 MHz)

E5MDS9710N-1 (806–940 MHz E5MDS4710 (403–512 MHz)

DATA CHARACTERISTICS

Signaling Type: EIA/RS-232; DB-25 Female connector

Data Interface Rates: 1200–19200 bps, asynchronous

Data Latency: 10 ms maximum

PRIMARY POWER

Voltage: 13.8 Vdc Nominal (10.5 to 16 Vdc)

Negative-Ground Systems Only

TX Supply Current: 2.5 A (Maximum) @ 5 W RF Output

RX Supply Current: Operational—125 mA, Nominal

Standby (sleep)—15 mA, Nominal

Power Connector: 2-pin polarized & locking connector

Fuse: 4 A Thermal Fuse, Self-Resetting, Internal

(Remove primary power to reset)

ENVIRONMENTAL

Humidity: 95% at 40 degrees C (104°F), non-condensing

Temperature Range: –30 to 60 degrees C (–22°F to +140°F)

Weight: 1.0 kilograms

Case: Die-cast Aluminum

DIAGNOSTICS INTERFACE

Signalling Standard: RS-232

Connector: DIAG—RJ-11 (Dedicated)

DATA INTERFACE—DB-25 (Alternate, See “Performing Network-Wide Remote

Diagnostics” on Page 37)

I/O Devices: GE MDS Hand-Held Terminal,

PC with GE MDS software, or other Terminal Communications program.

6.2 Helical Filter Adjustment

If the frequency of the radio is changed more than 5 MHz, adjust the helical filters for maximum received signal strength (RSSI) as follows:

1. 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 on Page 37.

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.

36 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

4. Measure the radio’s RSSI using one of the following methods:

FRONT PANEL

OF RADIO

J301

U104

U101

U202

HELICAL

ADJUSTMENTS

U203

SHIELD COVER

• With an HHT (see Section 4.0, TRANSCEIVER PROGRAM-

MING on Page 15).

• With GE MDS Radio Configuration Software (see Section 6.5,

Upgrading the Radio’s Software on Page 40).

• With a voltmeter connected to Pin 21 of the DATA INTERFACE connector (See Section 3.2, RSSI Measurement on Page 14).

5. With a non-metallic adjustment tool, adjust each section of the helical filters for maximum RSSI. Re-install the cover to the transceiver.

Invisible place holder

6.3 Performing Network-Wide Remote Diagnostics

Diagnostics data from a remote radio can be obtained by connecting a laptop or personal computer running GE MDS InSite NMS software to any radio in the network. Figure 13 shows an example of a setup for performing network-wide remote diagnostics.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 37

Figure 12. Helical Filter Locations

Invisible place holder

RTU

DIAGNOSTICS DATA

(TO InSite)

HOST COMPUTER

RTU

DIAGNOSTICS

PORT

TO DATA

PORT

MASTER STATION

ROOT

DTYPE

ROOT

PAYLOAD DATA

(TO SCADA APPLICATION)

RTU

DTYPE

NODE

DTYPE

NODE

DTYPE

NODE

Figure 13. Network-Wide Remote Diagnostics Setup

If a PC is connected to any radio in the network, you can perform intrusive polling (polling that briefly interrupts payload data transmission). To perform diagnostics without interrupting payload data transmission, connect the PC to a radio defined as the “root” radio. A radio is defined as a root radio using the

DTYPE ROOT command at the radio.

A complete explanation of remote diagnostics can be found in GE MDS’ Network-Wide Diagnostics System Handbook. See the handbook for more information about the basic diagnostic procedures outlined below.

DLINK ON and DLINK [baud rate] commands

1. Program one radio in the network as the root radio by entering the

DTYPE ROOT command at the radio.

2. At the root radio, use the to configure the diagnostic link protocol on the RJ-11 port.

38 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

3. Program all other radios in the network as nodes by entering the

DTYPE NODE command at each radio.

4. Use the DLINK ON and DLINK [baud rate] commands to configure the

RXD TXD GND

2 3 5

DB-9 FEMALE

(TO COMPUTER) TXD RXD GND

4 5 6

RJ-11 PLUG

(TO RADIO)

RJ-11 PIN LAYOUT

diagnostic link protocol on the RJ-11 port of each node radio.

5. Connect same-site radios using a null-modem cable at the radios’ diagnostic ports.

6. Connect a PC with GE MDS InSite software installed to the root radio, or to one of the nodes, at the radio’s DIAG port (this PC can also be the PC used to collect payload data, as shown in Figure 13).

To connect a PC to the radio’s DIAG port, an RJ-11-to-DB-9 adapter (MDS P/N 03-3246A01) is required. If desired, an adapter cable can be made using the information shown in Figure 14.

Invisible place holder

Figure 14. RJ-11 to DB-9 Adapter Cable

7. Start the GE MDS InSite application at the PC (see the GE MDS InSite User’s Guide for instructions).

6.4 User-Programmable Interface Output

Functions

You can manually activate two pins of the DATA INTERFACE using GE MDS’ InSite NMS software. These two outputs (#1–Pin 22 and #2–Pin 15) can be connected to compatible user-provided data devices. The pins provide either a logic high or low depending on the last command from the screen of InSite. In this InSite window, clicking the SET button sets the output to high, and clicking on CLEAR sets the output to low. Figure 15 shows the software controls.

One pin on the DATA INTERFACE can be configured as a digital input. If DIN ON is selected, Pin 16 becomes a digital input. The input is set when 5 V is applied, and clear when grounded. The same physical input can be queried as the analog input value on other InSite screens.

USER I/O SETTINGS in the Network Wide Radio Configuration

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 39

Invisible place holder

Green Indicates current output state at associated radio transceiver is “high”.

Click to set output to “low”.

Figure 15. GE MDS InSite Radio Device User I/O Settings

(Bottom Left-hand Corner of Network Wide Radio Configuration Screen)

These output-only pins are designed for low switching rates and do not pass high-speed data, nor are they suitable for latency-sensitive remote controls. An example of this function is to reset the connected remote RTU or turn on a security device at the associated transceiver’s location.

Table 12. User-Programmable Interface Output Functions

using Transceiver Interface Port

Function Interface

Digital Output #1 Pin 22 Set = 3 V

Digital Output #2 Pin 15 Set = +9.5 V

Digital Input Pin 16 Set = 5 V

* Voltages are typical and vary with load.

Pin States* Compatibility

CMOS

Clear = 0 V

EIA-232 Compatible

Clear = –9.5 V

CMOS

Clear = 0 V

6.5 Upgrading the Radio’s Software

Windows-based Radio Configuration software is available (MDS P/N 03-3156A01) for upgrading the internal radio software when new features become available from GE MDS. Contact GE MDS for ordering information, or download new radio software from www.gemds.com.

To connect a PC to the radio’s (MDS P/N 03-3246A01) is required. If desired, an adapter cable can be made using the information shown in Figure 14.

Using the Radio Configuration software, select

UPGRADE

instructions to determine how to proceed.

under the SYSTEM menu. Follow the prompts and online

DIAG port, an RJ-11 to DB-9 adapter

RADIO SOFTWARE

40 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

Software upgrades are distributed as ASCII files with an “.S28” exten-

HANDSET JACK

RED = ORDERWIRE ACTIVE/ TX KEYED

TO RADIO TRANSCEIVER

TO RADIO DATA DEVICE

sion. These files use the Motorola S-record format. When the download is activated, the radio’s PWR LED flashes rapidly to confirm that a download is in process. The download takes approximately 2 min.

NOTE: If a download fails, the radio is left unprogrammed and inop-

erative. This is indicated by the PWR LED flashing slowly (1 sec on/1 sec off). This condition is only likely if there is a power failure to the computer or radio during the downloading process. The download can be attempted again when the fault is corrected.

6.6 External Orderwire Module

During installation or troubleshooting activities, it is desirable to communicate by voice between personnel at the Master Station and the Remote Station sites to coordinate their activities. An optional external orderwire module from GE MDS (P/N 12-1297A01) is available that can be inserted between the radio’s DATA INTERFACE and the user’s data communication device.

Invisible place holder

Installation

Install the Orderwire (O/W) Module between the radio transceiver’s

DATA INTERFACE connector and the connected device. A handset

should also be connected to the associated Master Station’s orderwire jack.

The payload data exchanges pass through the Orderwire Module uninterrupted until the Orderwire Module is in use. The module has a voice-operated switch (VOX) that keys the connected transceiver whenever audio is picked up by a handset plugged into the RJ-11 phone jack. Any standard telephone handset can be used, or a rugged handset (P/N

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 41

Figure 16. Orderwire Adapter Module

(MDS P/N 12-1307A01)

12-1307A01 without PTT; 12-1307A01 with PTT) can be purchased from GE MDS. Handsets must have carbon microphone elements installed. Dynamic microphones do not work with the module. Handsets with a push-to-talk (PTT) button are supported and recommended, as background noise can activate the VOX circuit and interrupt the payload data.

Operation

To operate the orderwire, activate the handset (PTT or VOX). This keys the transmitter and passes the audio over the network to the handset of the Master Station. Only one person can speak at a time (simplex). In noisy locations, it might be necessary to cover the handset mouthpiece to prevent accidental keying of the transmitter.

NOTE: When the transmitter is keyed by the orderwire operation,

normal payload data is interrupted. Be sure to disconnect the module or handset to restore normal

data communications.

42 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

6.7 dBm-Watts-Volts Conversion Chart

Table 13 is provided as a convenience for determining the equivalent

wattage or voltage of an RF power expressed in dBm.

Table 13. 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

0.2251.0mW

-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

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 43

7.0 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 transceiver.

Active Messaging—This is a mode of diagnostic gathering that may interrupt SCADA system polling communications (contrast with pas- sive messaging). Active (or intrusive) messaging is much faster than passive messaging because it is not dependent upon the RTU polling cycle.

Antenna System Gain—A figure, normally expressed in dB, representing 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. Decibel (dB)—A measure computed from the ratio between two signal

levels. Frequently used to express the gain (or loss) of a system.

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. 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 4710/9710 is a DCE device.

Digital Signal Processing—See DSP.

44 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

DSP—Digital Signal Processing. In the MDS 4710/9710 transceiver, the DSP circuitry is responsible for the most critical real-time tasks; primarily modulation, demodulation, and servicing of the data port.

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, frequency 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 synchronizing 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 transmission 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.

Intrusive Diagnostics—A mode of remote diagnostics that queries and commands radios in a network with an impact on the delivery of the system “payload” data. See Active messaging.

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 purpose of gathering telemetry data.

Master (Station)—Radio which is connected to the host computer. It is the point at which polling enters the network.

MCU—Microcontroller Unit. This is the processor responsible for controlling system start-up, synthesizer loading, and key-up control.

Microcontroller Unit—See MCU. Multiple Address System—See MAS.

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 45

Network-Wide Diagnostics—An advanced method of controlling and interrogating GE MDS radios in a radio network.

Non-intrusive diagnostics—See Passive messaging. Passive messaging—This is a mode of diagnostic gathering that does

not interrupt SCADA system polling communications. Diagnostic data is collected non-intrusively over a period of time; polling messages are carried with SCADA system data (contrast with active messaging).

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.

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.

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.

Programmable Logic Controller—See PLC. Remote (Station)—A radio in a network that communicates with an

associated master station.

Remote Terminal Unit—See RTU. Redundant Operation—A station arrangement where two transceivers

and two power supplies are available for operation, with automatic switchover in case of a failure.

RTU—Remote Terminal Unit. A data collection device installed at a remote radio site. An internal RTU simulator is provided with 4710/9710 radios to isolate faults to either the external RTU or the radio.

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 guideline, reflected power should not exceed 10% of the forward power ( 2:1 SWR).

46 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

NOTES

MDS 05-3305A01, Rev. E MDS 4710/9710 Technical Manual 47

48 MDS 4710/9710 Technical Manual MDS 05-3305A01, Rev. E

IN CASE OF DIFFICULTY...

GE 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 information will assist you in the event that servicing becomes necessary.

TECHNICAL ASSISTANCE

Technical assistance for GE MDS products is available from our Technical Support Department 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 experiencing. In many cases, problems can be resolved over the telephone, without the need for returning the unit to the factory. Please use one of the following means for product assistance:

Phone: 585 241-5510 E-Mail: gemds.techsupport@ge.com FAX: 585 242-8369 Web: www.gemds.com

F A CTORY SERVICE

Component level repair of this 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 must obtain a Service Request Order (SRO) number. This number helps expedite the repair so that the equipment can be repaired and returned to you as quickly as possible. Please be sure to include the SRO number on the outside of the shipping box, and on any corre spondence relating to the repair. No equipment will be accepted for repair without an SRO number.

SRO numbers are issued online at www.gemds.com/support/product/sro/. Your number will be issued immediately after the required information is entered. Please be sure to have the model number(s), serial number(s), detailed reason for return, "ship to" address, "bill to" address, and contact name, phone number, and fax number available when requesting an SRO number. A purchase order number or pre-payment will be required for any units that are out of warranty, or for product conversion.

If you prefer, you may contact our Product Services department to obtain an SRO number: Phone Number: 585-241-5540

Fax Number: 585-242-8400 E-mail Address: gemds.productservices@ge.com

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:

GE MDS, LLC Product Services Department (SRO No. XXXX) 175 Science Parkway Rochester, NY 14620 USA

When repairs have been completed, the equipment will be returned t o you by the same shipping method used to send it to the factory. Please specify if you wish to make different shipping arrangements. To inquire about an in-process repair, you may contact our Product Services Group using the telephone, Fax, or E-mail information given above.

GE MDS, LLC 175 Science Parkway Rochester, NY 14620

General Business: +1 585 242-9600

FAX: +1 585 242-9620

www.gemds.com

INDEX

ACCESS DENIED error message 19 Accessories 5 Accessory Power pinout (Pin 18) 12 Active messaging (defined) 44 Alarms

alarm code definitions 34 major vs. minor 33 pinout (Pin 25) 12

using ST AT command to display 31 AMASK command 21 Antenna

installation 6

RSSI command used to refine heading 14

system gain, defined 44

Yagi, illustrated 9 Antennas 9 Applications 2

Multiple Address Systems (MAS) 2

point-to-multipoint system 2

point-to-point system 3 ASENSE command 23

BAUD command 24 Baud rate

setting for RJ-11 DIAG port (DLINK command) 26, 38 Bit, defined 44 Bits-per-second. See BPS 44 BPS (bits-per-second), defined 44 BUFF command 24 Byte, defined 44

DTYPE (set radio to root or node for diagnostics) 26 DUMP (display all programmed settings) 26 entering on Hand-Held Terminal (HHT) 17 Hand-Held Terminal (HHT) 17 HREV (display hardware revision level) 27 INIT (reinitialize radio to factory defaults) 27 INIT xx10 (restore standard transceiver defaults) 27 INIT xx20 (configure radio for use with P-20 chassis) 27 KEY (activate transmitter) 28 Keyboard 17 MODEL (display radio model number code) 28 MODEM (set modem speed) 28 OWM (set/display owner’s message) 28 OWN (set/display owner’s name) 28 PTT (set/display key-up delay) 28 PWR (set/display RF forward output power) 28 RSSI (display RSSI) 29 RTU (enable/disable internal RTU) 29 RX (set/display receive frequency) 29 RXTOT (set/display receive time-out timer value ) 30, 32 SCD (set/display soft-carrier dekey delay) 30 SER (display radio serial number 30 SHOW (display DC voltage, data port, RF power) 30 SNR (display signal-to-noise ratio) 30 SREV (display software revision level) 31 ST AT (display current alarm status) 31 TEMP (display internal temperature) 31 TOT (set/display time-out value and timer status) 31

TX (set/display transmit frequency) 31 Conversions, dBm-Watts-Volts 43 CTS command 25 CTS pinout (Pin 5) 11

Cable, loss due to length of coaxial at 400 MHz 9 Cable, loss due to length of coaxial at 960 MHz 10 Carrier

Switched 3

Cautions

use attenuation between all units in test setup 38, 41 CKEY command 25 Codes, Model Number 4 Command Descriptions 21 COMMAND F A ILED er ror message 19 Command summary, table 19 Commands

AMASK (set/display alarm triggers) 21

ASENSE (set alarm output state) 23

BAUD (set/display rate, encoding) 24

BUFF (set/display data handling mode) 24

CKEY (enable/disable continuous keying) 25

CTS (set/display CTS line response timer) 25

DATAKEY (enable/disable transmitter keying by radio) 25

descriptions 21–32

DEVICE (set/display radio behavior) 25

DKEY (deactivate transmitter after KEY command) 26

DLINK (enable/disable network-wide diagnostics) 26

Data Circuit-terminating Equipment—See DCE 44 Data Communications Equipment—See DCE. 44 Data interface

connector pinouts 11 display active connector port 30

installing connection 11 Data Terminal Equipment—See DTE 44 DATAKEY command 25 dB. See Decibel 44 dBi, defined 44 dBm, defined 44 DCD

LED 14

pinout (Pin 8) 11 DCE (Data Circuit-terminating Equipment), defined 44 Decibel (dB), defined 44 Description, product 1 DEVICE command 25 Diagnostic Channel Enable, pinout (Pin 23) 12 Diagnostics

interface specifications 36

network-wide, performing 37, 39, 41

PC software used for 40

using InSite software for network-wide 37, 39

05-3305A01, Rev. E MDS 47 10/9710 Technical Manual I-1

Digital Signal Processing—See DSP. 44 Display

alarm status (STAT command) 31 alarm triggers (AMASK command) 21 all programmed settings (DUMP command) 26 baud rate and encoding (BAUD command) 24 connector port, active (SHOW command) 30 CTS line response timer (CTS command) 25 data handling mode (BUFF command) 24 DC voltage (SHOW command) 30 hardware revision leve (HREV command)l 27 key-up delay (PTT command) 28 model number code (MODEL command) 28 owner’s message (OWM command) 28 owner’s name (OWN command) 28 radio behavior (DEVICE command) 25 radio serial number (SER command) 30 receive frequency (RX command) 29 receive time-out timer value (RXTOT command) 30, 32 RF forward output power (PWR command) 28 RF output (SHOW command) 30 RSSI (RSSI command) 29 signal-to-noise ratio (SNR command) 30 soft-carrier dekey delay (SCD command) 30 software revision level (SREV command) 31 temperature, internal (TEMP command) 31 time-out value and timer status (TOT command) 31

transmit frequency (TX command) 31 DKEY command 26 DLINK command 26

use of 38 Downloading new software 40 DSP (Digital Signal Processing), defined 45 DSR pinout (Pin 6) 11 DTE (Data Terminal Equipment), defined 45 DTYPE command 26

use of 38 DUMP command 26

Earth Ground 10 EEPROM FAILURE error message 19 EMP command 26 Enable/disable

continuous keying (CKEY command) 25

diagnostic channel, pinout (Pin 23) 12

internal RTU (RTU command) 29

network-wide diagnostics (DLINK command) 26

network-wide diagnostics, procedures 38 Environment specifications 36 Equalization, defined 45 Error Messages 19 Error messages 19

access denied 19

command failed 19

EEPROM failure 19

incorrect entry 19

not available 19

not programmed 19

text too long 19

unknown command 19 Event Codes 33

Definitions 34

Fade margin, defined 45

Feedlines 9 Filter, helical, adjustm ent 36 Frame, defined 45 Frequency

adjusting helical filter when changed 36 setting. See TX and RX commands

Glossary 44 Ground

on Pin 12 to enable Sleep mode 11 protective (Pin 1) 11 signal (Pin 7) 11

Half-duplex 3

switched carrier operation 3

Hand-Held Terminal (HHT) 5

connected to transceiver, illustrated 16 connection and startup 15 display in response to STAT command, illustrated 33 entering commands 17 error messages displayed on 19 keyboard commands 17 operational settings, table 17 reinitialization display, illustrated 16 reinitializing 16

Setup 16 Hardware flow control, defined 45 Helical filter

adjusting 36

illustration 37 Host computer, defined 45 HREV command 27

Illustrations

antenna, Yagi 9

Hand-Held Terminal (HHT) connected to transceiver 16

Hand-Held Terminal (HHT) reinitialization display 16

Hand-Held Terminal display in response to STAT

command

33 helical filter locations 37 MAS network 2 network-wide diagnostics 38 point-to-point link 3 remote station arrangement 6 RJ-11 to DB-9 adapter cable 39, 40 RSSI vs. Vdc 12, 15 transceiver connectors & indicators 1 transceiver mounting dimensions 8

INCORRECT ENTRY error message 19 INIT command 27 INIT xx10 command 27 INIT xx20 command 27 InSite software

using to perform remote diagnostics 37, 39

Installation 5–12

antenna 6 configuring transceiver 7 DATA INTERFACE connection 6 data interface connections 11 power 7 power connection 10 steps 6

I-2 MDS 4710/9710 Technical Manual 05-3305A01, Rev. E

Interface Output Functions 39 Intrusive diagnostics (defined) 45

KEY command 28 Keyboard Commands

Command Summary 19 Entering Commands 17 Error Messages 19

Keying

continuously keyed versus switched carrier operation 3 continuously keyed, defined 3 on data (DKEY command) 26 switched carrier, defined 3

Latency, defined 45 LEDs

DCD 14 Indicators

Troubleshooting 32

indicators, described 14 PWR 14 RXD 14 RXD, Pin 3 11 status indicators, illustrated 14 TXD 14 TXD, Pin 2 11

Loss. See Signal

MAS (Multiple Address System) 2

defined 45 illustration 2

Master Station

defined 45

keying behavior 3 MCU (Microcontroller Unit), defined 45 Microcontroller Unit—See MCU. 45 MODEL command 28 Model Number Codes 4 Model number codes 4

displaying (MODEL command) 28 MODEM command 28 Modem, set speed. See MODEM command Multiple Address System—See MAS. 45

Network-wide diagnostics

active messaging, defined 44

defined 46

enable/disable (DLINK command) 26

enable/disable internal RTU (RTU command) 29

illustrated 38

intrusive diagnostics, defined 45

passive messaging (defined) 46

procedures 37, 39, 41

set radio to root or node (DTYPE command) 26 Non-intrusive diagnostics—See Passive messaging. 46 NOT AVAILABLE error message 19 NOT PROGRAMMED error message 19

Operation 13–15

environment specifications for 36

Orderwire Module 41 Output, 9.9 Vdc regulated, pinout (Pin 19) 12 OWM command 28 OWN command 28 Owner’s message, set/display. See OWM command Owner’s name, set/display. See OWN command

Passive messaging (defined) 46 Payload data (defined) 46 Pinouts on data interface 11 PLC (Programmable Logic Controller), defined 46 Point-to-multipoint

defined 46 system 2

Point-to-point

link, illustrated 3

system 3 Poll, defined 46 Power

connection 10

display DC voltage (SHOW command) 30

display RF output (SHOW command) 30

installing 7

LED status indicator (PWR LED) 14

RF, chart for converting dBm-Watts-Volts 43

specifications 36 Procedures

checking for alarms (STAT command) 33

connecting Hand-Held Terminal (HHT) 15

downloading new software 40

entering commands using the Hand-Held Terminal

(HHT) helical filter adjustment 36 installation 6 measuring RSSI with DC voltmeter 14 network-wide diagnostics 37, 39, 41 operation 13, 15 performance optimization 14 reading LED status indicators 14 resetting Hand-Held Terminal (HHT) 16 troubleshooting 32–34

Product

accessories 5 description 1 display model number code (MODEL command) 28 display radio serial number (SER command) 30 model number codes 4

Programming radio as root or node 38 Programming, transceiver 15–32 PTT

command 28 pinout (Pins 14, 16) 12

PWR

command 28 LED 14

Radio

Configuration Software 5, 40 Inhibit pinout (Pin 12) 11 serial number, displaying (SER command) 30

Receive Audio Output pinout (Pin 11) 11 Receiver

specifications 36 system specifications 35

05-3305A01, Rev. E MDS 47 10/9710 Technical Manual I-3

unsquelched signal (Pin 10) 11 Redundant operation, defined 46 Remote

Station, defined 46

Station, illustrated 6 Resetting

Hand-Held Terminal (HHT) (SHIFT,CTRL,SPACE

keys)

transceiver (INIT command) 27 Revision level

display hardware (HREV command) 27

display software (SREV command) 31 RSSI

adjusting helical filter for increased signal strength 36

command 29

command, used to refine antenna heading 14

measuring 14

pinout (Pin 21) 12

vs. Vdc, illustrated 12, 15 RTS pinout (Pin 4) 11 RTU

command 29 RTU (Remote Terminal Unit)

defined 46 RUS pinout (Pin10) 11 RX command 29 RXD LED

description 14

Pin 3 11 RXLEVEL command 30 RXTOT command 30, 32

Safety 10 SCADA (Supervisory Control And Data Acquisition),

defined

46 SCD command 30 SER command 30 Set

alarm output state (ASENSE command) 23 alarm triggers (AMASK command) 21

receive time-out timer value (RXTOT command) 30, 32 SHOW command 30 Signal

ground (Pin 7) 11

loss due to coaxial cable length at 960 MHz, table 10

loss due to coaxial cable length, table 9 Simplex 3

single-frequency operation 4

special case of switched carrier operation 4 Sleep mode

example implementation 13

ground on Radio Inhibit pin activates 11

Pin 12 11

shown by PWR LED status indicator 14 SNR command 30 Software

diagnostics and control used from PC 40

display revision level 31

upgrades (.S28 files) 41

upgrading 40

used for diagnostics and programming 15 Specifications

diagnostics interface 36

environment 36

power 36

receiver 36 receiver system 35 transceiver 35–36 transmitter 35

transmitter system 35 SREV command 31 Standing Wave Ratio—See SWR. 46 ST AT command 31 Supervisory Control And Data Acquisition—See SCADA. 46 Switched-Carrier 3 SWR (Standing Wave Radio), defined 46

Tables

accessories 5

alarm code definitions 34

command summary 19

conversions, dBm-Watts-Volts 43

data interface connector pinouts 11

Hand-Held Terminal (HHT) operational settings 17

LED status indicators 14

length vs. loss in coaxial cables 9

length vs. loss in coaxial cables at 960 MHz 10 Technical reference 35–43 TEMP command 31 Temperature, displaying internal (TEMP command) 31 TEXT TOO LONG error message 19 Timer, set/display time-out value and status (TOT

command)

31 TOT command 31 Transceiver

applications 2 configuring for operation 7 connectors and indicators, illustrated 1 diagnostics using PC software 40 dimensions, mounting 8 mounting 6, 7 programming 15–32 specifications 35–36

upgrading software 40 Transmit Audio Input pinout (Pin 9) 11 Transmitter

specifications 35

system specifications 35 Troubleshooting 32–34

connecting Hand-Held Terminal (HHT) for displaying

alarm codes

15 performing network-wide diagnostics 37, 39, 41 STAT command (Status) 33 using PC software for 40

TX command 31 TXD LED

description 14 Pin 2 11

TXLEVEL command 32

UNIT command 32 UNKNOWN COMMAND error message 19

I-4 MDS 4710/9710 Technical Manual 05-3305A01, Rev. E

IN CASE OF DIFFICULTY...

TECHNICAL ASSISTANCE

Phone: 585 241-5510 E-Mail: gemds.techsupport@ge.com FAX: 585 242-8369 Web: www.gemds.com

F A CTORY SERVICE

If you prefer, you may contact our Product Services department to obtain an SRO number: Phone Number: 585-241-5540

Fax Number: 585-242-8400 E-mail Address: gemds.productservices@ge.com

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:

GE MDS, LLC Product Services Department (SRO No. XXXX) 175 Science Parkway Rochester, NY 14620 USA

GE MDS, LLC 175 Science Parkway Rochester, NY 14620

General Business: +1 585 242-9600

FAX: +1 585 242-9620

www.gemds.com

GE MDS 4710A, MDS 4710C, MDS 4710M, MDS 9710A, MDS 9710C Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual