MDS 4710B, MDS 9710B Operation Manual

MDS 4710B/9710B

Data T ransceiver

MDS 05-3316A01, REV. E

SEPTEMBER 2000

Installation and Operation Guide

a

b

c

QUICK START GUIDE

Below are the basic steps for installing the transceiver. Detailed instructions are given in “INSTALLA­TION” on page 5 of this guide.

1. Install and connect the antenna system to the radio

• Use good quality, low loss coaxial cable. Keep the feedline as short as possible.

• Preset directional antennas in the direction of desired transmission.

2. Connect the data equipment to the radio’s INTERFACE connector

• Connection to the radio must be made with a DB-25 Male connector. Connections for typical 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.)

DB-9 to DB-25 ExampleDB-25 to DB-25 Example

DB-25 DB-25

GND

11
2

TXD

3

RXD
RTS

4

RTU

CTS

5

(DTE)

6DSR

GND

20

77

DCD

8 8

As required for application

GND
TXD

2

RXD

3
4

RTS

4
5

CTS

5
6

DSR
GND

DCD

(DCE)

TRANSCEIVER

DB-9 DB-25

18

DCD

2

RXD

3

TXD

GND

(DTE)

DSR

RTS

CTS

5
6

20

7

RTU

3
2

5

7
6
4
5

As required for application

DCD
RXD

TXD
GND
DSR
RTS
CTS8

(DCE)

TRANSCEIVER

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 (

• Set the receive frequency (

• If the transceiver will be listening to a switched carrier master station, set switched carrier mode
operation with the

•

If the modem is 9600 bps,

mand, where

SWC

9600

is the data rate and

= Data bits (7 or 8)

= Parity (N for None, O for Odd, E for Even

= Stop bits (1 or 2)

(Example:

BAUD 9600 8N1

TX xxx.xxxxx

RX xxx.xxxxx

).

).

command.

set the data interface parameters as f ollo ws . Use the

abc

are the communication parameters as follows:

)

BA UD 9600 abc

com-

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 6 on page 13 for a description of the status LEDs.

• Refine directional antenna headings for maximum receive signal strength using the

RSSI

command.

TABLE OF CONTENTS

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

1.1 Applications ......................................................................................1

Multiple Address System (MAS).....................................................1

Point-to-Point System .....................................................................2

Continuously Keyed versus Switched Carrier Operation................2

Single Frequency (Simplex) Operation...........................................3

1.2 Model Number Codes ......................................................................3

1.3 Accessories ......................................................................................4

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

2.1 Installation Steps ..............................................................................6

2.2 Using the Radio’s Sleep Mode .........................................................7

System Example.............................................................................7

2.3 Transceiver Mounting .......................................................................8

2.4 Power Connection ............................................................................8

2.5 Antennas and Feedlines ..................................................................9

2.6 Data Interface Connections ............................................................10

3.0 OPERATION.............................................................................. 12

3.1 Initial Start-up .................................................................................12

3.2 Reading LED Status Indicators ......................................................13

3.3 RSSI Chart .....................................................................................14

3.4 Remote RTU Reset ........................................................................14

3.5 Remote Maintenance and Diagnostics Levels ...............................15

Mode 1—Loopback.......................................................................15

Mode 2—Advanced......................................................................15

Mode 3—Remote Maintenance....................................................15

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

4.1 Hand-Held Terminal Connection & Start-up ...................................16

4.2 Hand-Held Terminal Setup .............................................................17

5.0 TRANSCEIVER COMMANDS................................................... 18

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide i

5.1 General Command Information ......................................................18

Error Messages ............................................................................18

5.2 Command Summary ......................................................................19

5.3 Command Equivalents for Older Transceivers ...............................21

5.4 Detailed Command Descriptions ...................................................22

BAUD [9600 abc]..........................................................................22

CTS [0–255] .................................................................................23

DECF [0–100]...............................................................................23

DECP [0–100]...............................................................................23

DF.................................................................................................23

DIAGLEV [OFF, 1,2,3]...................................................................23

DKEY............................................................................................24

DP.................................................................................................24

DSTE............................................................................................24

DUMP...........................................................................................24

EMP [ON, OFF] ............................................................................24

ESTE ............................................................................................24

HREV............................................................................................25

IF ..................................................................................................25

INCF [1–99] ..................................................................................25

INCP [1–99]..................................................................................25

INIT...............................................................................................25

IP ..................................................................................................26

KEY ..............................................................................................26

LBC [xxxx] ....................................................................................26

MODEL.........................................................................................26

MODEM [NONE, BELL, 4800B, 9600B].......................................26

OWM [XXX...] ...............................................................................27

OWN [XXX...]................................................................................27

PTT [0–255]..................................................................................27

PWR [20–37] ................................................................................27

RMIS.............................................................................................27

RMOV...........................................................................................27

RMRD...........................................................................................28

RMST ...........................................................................................28

RSSI .............................................................................................28

RTU [ON/OFF/0-80]......................................................................28

RX [xxx.xxxxx] ..............................................................................28

RXLEVEL [–20...+3] .....................................................................28

SCD [0-255]..................................................................................29

SER ..............................................................................................29

SHOW [DC, PORT, PWR].............................................................29

SREV............................................................................................29

STAT .............................................................................................29

STE...............................................................................................30

SWC [ON, OFF]............................................................................30

TEMP............................................................................................30

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

TX [xxx.xxxxx]...............................................................................31

TXLEVEL [–20...+3, AUTO] ..........................................................31

6.0 TROUBLESHOOTING...............................................................31

ii MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

6.1 LED Status Indicators ....................................................................32

6.2 Event Codes ...................................................................................32

Checking for Alarms—STAT command.........................................32

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

Event Code Definitions.................................................................33

7.0 TECHNICAL REFERENCE.......................................................34

7.1 Transceiver Specifications ..............................................................34

7.2 Helical Filter Adjustment ................................................................35

7.3 Using PC Software with the Radio .................................................37

Connecting a PC ..........................................................................37

Upgrading the Radio’s Software...................................................37

7.4 Bench Testing Set-up .....................................................................38

7.5 dBm-Watts-Volts Conversion Chart ................................................39

Copyright Notice

This Installation and Operation Guide and all software described herein
are protected by
rights reserved.

copyright: 2000 Microwave Data Systems Inc. All

RF Exposure

Microwave Data Systems reserves its right to correct any errors and
omissions in this publication.

Operational Safety Notices

The radio equipment described in this guide emits radio frequency
energy. Although the power level is low, the concentrated energy from
a directional antenna may pose a health hazard. Do not allow people to
come within 6 meters of the front of the antenna when the transmitter is
operating.

This manual is intended to guide a professional installer to install,
operate and perform basic system maintenance on the described radio.

ISO 9001 Registration

Microwave Data Systems adheres to this internationally accepted
quality system standard.

MDS Quality Policy Statement

We, the employees of Microwave Data Systems, are committed to
achieving total customer satisfaction in everything we do.

Total Customer Satisfaction in:

• Conception, design, manufacture and marketing of our products.

• Services and support we provide to our internal and external

Total Customer Satisfaction Achieved Through:

• Processes that are well documented and minimize variations.

• Partnering with suppliers who are committed to providing quality and

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide iii

customers.

service.

• Measuring our performance against customer expectations and

industry leaders.

• Commitment to continuous improvement and employee involvement.

FM/UL/CSA Notice

This product is available for use in Class I, 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 three independent agencies —Underwriters Laboratories (UL), Fac­tory Mutual Research Corporation (FMRC) and the Canadian Standards
Association (CSA). The UL certification for the transceiver is as a Rec­ognized Component for use in these hazardous locations, in accordance
with UL Standard 1604. The FMRC Approval is in accordance with
FMRC Standard 3611. The CSA Certification is in accordance with
CSA STD C22.2 No. 213-M1987.

FM/UL/CSA Conditions of Approval:
The transceiver is not acceptable as a stand-alone unit for use in the haz-

ardous 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:

1. The transceiv er must be mounted within a separate enclosure which
is suitable for the intended application.

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

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

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

5. When installed in a Class I, Div. 2, Groups A, B, C or D hazardous

iv MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

location, observe the following:

WARNING —EXPLOSION HAZARD—

equipment unless power has been switched off or the area is known
to be non-hazardous.

Do not disconnect

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.

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 MDS web
site at www.microwavedata.com.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide v

vi MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

1.0 GENERAL

This guide presents installation and operating instructions for the MDS
9710B (900 MHz) and MDS 4710B (400 MHz) radio transceiver. For
brevity, the model number “MDS x710B” is used in this guide to repre­sent both models, except where it is necessary to distinguish between the
two.

The transceiver (Figure 1) is a data telemetry radio suitable for Multiple
Address System (MAS) and Supervisory Control and Data Acquisition
(SCADA) operation. It uses microprocessor control and Digital Signal
Processing (DSP) technology to provide highly reliable communica­tions even under adverse conditions.

These radios are designed for over-the-air compatibility with earlier
MDS remote transceivers such as the MDS 2300 and MDS 4300 Series
as well as the MDS 1000µ. The radios will operate in systems using
MDS 2100 and 4100 master stations.

An MDS 4710 is also available which is adherent to the United
Kingdom’s MPT1411 specifications for radio performance and fre­quency assignment criteria. The MPT1411 compliant version of the
MDS 4710 is covered in MDS manual 05-3634A01.

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SERIAL NUMBER

LABEL

LED INDICATORS (4)

EXTERNAL

INTERFACE

CONNECTOR

(DB-25)

DIAGNOSTICS
CONNECTOR (RJ-11)

13.8 VDC POWER
CONNECTOR

ANTENNA CONNECTOR
(TYPE “N”)

1.1 Applications

Multiple Address System (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

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 1

Figure 1. Transceiver connectors & indicators

Figure 2. An MAS network provides communications between a central
host computer and remote terminal units (RTUs) or other data collection
devices. The operation of the radio system is transparent to the computer
equipment.

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REMOTE RADIO

RTU

RTU

REMOTE RADIO

SWC OFF

P
W

R

IDIAG

1
3
.
8

VD
C

+ –

–

REMOTE RADIO

SWC OFF

P
W

R

ID
I
AG

13
.8 V

D
C

+ –

–

CONTINUOUSLY

MDS MASTER

HOST SYSTEM

KEYED

STATION

ORDER

SIDE B
POWER

WIRE

RTU

PWR

IDIAG

13.8 VDC

–

+

–

RTU

SWC OFF

PWR

ID
I
AG

REMOTE RADIO

RTU

P

W
R

IDIAG

13.8
V
DC

+ –

–

REMOTE RADIO

SWC OFF

1

3.8
VDC
+
–

–

SWC OFF

Figure 2. Typical MAS network

Point-to-Point System

Where permitted, the transceiver may also be used in a point-to-point
arrangement as shown in Figure 3.

A point-to-point system consists of
just two radios. It provides a simplex or half-duplex communications
link for the transfer of data between two locations. Refer to

ously Ke yed versus Switched Carrier Operation on pag e 2

Continu-

for additional

information.

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HOST

COMPUTER

SWC ON

RTU

Figure 3. Typical point-to-point link

SWC ON

Continuously Keyed versus Switched Carrier Operation

The keying behavior of the master station can be used to describe an
MAS system.

2 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

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. Continuously keyed operation is inherently full duplex.
The master station is always simultaneously transmitting and continu­ously listening. Different frequencies must be used for transmit and
receive. This is the method used in most MAS systems and is shown in
Figure 2.

Switched Carrier operation is a half-duplex mode of operation where

the master station transmitter is keyed to send data and unkeyed to
receive.

For proper operation, x710B radios must be specifically configured to
listen to either a continuously keyed or switched carrier master. The

SWC

command is used to select whether or not a radio is listening to a
switched carrier master. The default setting is

SWC OFF

, for communica-

tions with a continuously keyed master.
MDS x710B radios always transmit using switched carrier operation. If

a radio system is configured with an x710B as the master, all radios
(master and remotes) must be configured with

SWC ON

. This situation is

shown in a point-to-point system in Figure 3.

Single Frequency (Simplex) Operation

Single frequency operation (also known as simplex) is a special case of
switched carrier operation. The

SWC

command must be set to

ON

. Single
frequency operation is automatically selected whenever the transmit and
receive frequencies are set to the same value. Note that data turn-around
times are increased when a single frequency configuration is used.

1.2 Model Number Codes

The radio model number is printed on the end of the radio enclosure, and
provides key information about how the radio was configured when it
was shipped from the factory. See Figure 4 for an explanation of the
model number characters.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 3

THIS INFORMATION IS
SUBJECT TO CHANGE.
DO NOT USE FOR
PRODUCT ORDERING.

1

7

4

OPERATION

(X) Base/Remote

MODE

(N) Non-Redundant

0

B

PRIMARY POWER

(1) 10.516 VDC

MODE

(N) Non-Redundant

DIAGNOSTICS

(Ø) None
(1) Remote
(2) Master

MODEM

(0) 4-Wire Audio
(1) 1200 BPS
(A) 4800 BPS ASYNC
(B) 9600 BPS ASYNC

DIAGNOSTICS

(Ø) None
(1) Remote
(2) Master

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RECEIVE FREQ.
(A) 380400 MHz
(B) 400420 MHz
(C) 420450 MHz
(D) 450480 MHz
(E) 480512 MHz
(J) 457.5458.5 MHz
(K) 463.0464.0 MHz

BANDWIDTH

(1) 12.5 kHz

TRANSMIT FREQ.

(1) 380400 MHz
(2) 400450 MHz
(3) 450512 MHz
(D) 457.5458.5 MHz
(E) 463.0464.0 MHz

RECEIVE FREQ.

(A) 800–860 MHz
(B) 860–900 MHz
(C) 900–960 MHz

REGULATORY CERT.

(N) N/A

SAFETY CERT.

(N) N/A

MOUNTING BRACKETS

(A) Standard
(B) None

FEATURES

(0) Full
(1) No Sleep mode
No Diagnostics
Less than 4800 bps

REGULATORY CERT.

(N) N/A

SAFETY CERT.

(N) N/A

0

1

9

7

OPERATION

(X) Base/Remote

B

PRIMARY POWER

(1) 10.5–16 VDC

MODEM

(0) 4-Wire Audio
(1) 1200 BPS
(A) 4800 BPS ASYNC
(B) 9600 BPS ASYNC

BANDWIDTH

(1) 12.5 kHz

TRANSMIT FREQ.

(1) 800–880 MHz
(2) 880–960 MHz

MOUNTING BRACKETS

(A) Standard
(B) None

FEATURES

(0) Full
(1) No Sleep mode,

No Diagnostics,
Less than 4800 bps

Figure 4. Model number codes

1.3 Accessories

The transceiver can be used with one or more of the accessories listed in
Table 1. Contact Microwave Data Systems for ordering information.

Table 1. MDS x710B optional accessories

Accessory Description MDS P/N

Hand-Held Terminal
Kit (HHT)

RTU Simulator Test unit that simulates data from a

Order Wire Module External device that allows temporary

Order Wire Handset Used with Order Wire Module (above). 12-1307A01

Terminal that plugs into the radio for
programming, diagnostics & 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 & testing of the radio system.

02-1501A01

03-2512A01

02-1297A01

4 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

Table 1. MDS x710B optional accessories

Accessory Description MDS P/N

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

RS-232 to RS-422
Converter Assembly

Radio Configuration
Software

Synchronous to
Asynchronous Data
Converter

DIAGNOSTICS port
External adapter plug that converts the

radio’s DATA INTERFACE connector
to RS-422 compatible signaling.

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

Allows synchronous operation of the
x710 transceiver.

(Continued)

03-3246A01

03-2358A01

03-3156A01

Contact MDS

2.0 INSTALLATION

There are three main requirements for installing the transceiver—ade­quate and stable primary power, a good antenna system, and the correct
interface between the transceiver and the data device. Figure 5 shows a
typical remote station arrangement.

Invisible place holder

13.8 VDC
POWER

CABLE

REMOTE TERMINAL
UNIT

ANTENNA SYSTEM

RADIO

TRANSCEIVER

LOW-LOSS FEEDLINE

13.8 VDC

2.5 A (Minimum)
POWER SUPPLY

Figure 5. Typical remote station arrangement

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 5

2.1 Installation Steps

ENTER

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 brack ets supplied
with the radio.

2. Install the antenna and antenna feedline for the station. Connect the
feedline to the radio and preset directional antennas in the appropri­ate direction.

3. Connect the data equipment to the transceiver’s

INTERFACE connec-

tor. Typical applications require the use of only Pins 1 through 8 for
RS-232-type signaling. When using an external modem (4-wire
audio arrangement), only Pins 7, 9, 11 and 16 are typically required.

Additional connections may be required for some installations.
Refer to the complete list of pin functions provided in Table 5 on
page 11.

4. Measure and install the primary power for the radio. The red wire on
the power cable is the positive lead; the black is negative.

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

5. Set the radio configuration. The transceiver is designed for quick
installation with a minimum of software configuration required in
most cases. The selections that must be made for new installations
are:

• Transmit frequency

• Receive frequency

6 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

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. It
is always best to verify the frequencies using the steps below. (See
Figure 4 on page 4 for the frequency range of your radio.)

a. Connect a hand-held terminal (HHT) to the

DIAGNOSTICS con-

nector. When the HHT beeps, press to receive the ready
“>” prompt.

b. Set the operating frequencies using the

and RX xxx.xxxxx (receive) commands. Press . After pro­gramming, the HHT reads

PROGRAMMED OK to indicate success-

TX xxx.xxxxx (transmit)

ENTER

ful entry.

6. 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-

NOSTICS connector.—See TRANSCEIVER PROGRAMMING on

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

3.3 RSSI Chart

2.2 Using the Radio’s Sleep Mode

In some installations, such as at solar-powered sites, it may be necessary
to keep the transceiver’s power consumption to an absolute minimum.
This can be accomplished using the Sleep Mode. In this mode, power
consumption is reduced to less than 16 milliamperes.

Sleep mode can be enabled under RTU control by asserting a ground (or
RS-232 low) on Pin 12 of the radio’s

When Pin 12 is opened (or an RS-232 high is asserted), the radio will be
ready to receive data within 75 milliseconds.

All normal functions are suspended while the radio is in sleep mode. The

PWR LED will be off.

DATA INTERFACE connector.

System Example

The following example describes Sleep Mode implementation in a typ­ical system. Using this information, you should be able to configure a
system that will meet your own particular needs.

Example:

Suppose you need communications 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

DAT A INTERF A CE connector. This will allow each RTU to

be polled once per hour with a significant savings in power con­sumption.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 7

2.3 Transceiver Mounting

Figure 6 shows the mounting dimensions of the transceiver.

Invisible place holder

ALTERNATE

POSITION

1.75"

2.75"

70 mm

4.44 CM

6.63"

168 mm

7.25"
184 mm

8.5"

216 mm

5.625"

143 mm

2.0"

2.25"

50 mm

57 mm

Figure 6. Transceiver mounting dimensions

2.4 Power Connection

The transceiver can be operated from any well-filtered 10.5 to 16 Vdc
power source. The power supply should be capable of providing at least

2.5 amperes 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.

8 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

2.5 Antennas and Feedlines

Antennas

The transceiver can be used with a number of antennas. The exact style
depends on the physical size and layout of the radio system. A direc­tional Yagi (Figure 7) or corner reflector antenna is generally recom­mended at remote sites to minimize interference to and from other users.
Antennas of this type are available from several manufacturers.

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Figure 7. Typical Yagi antenna (mounted to mast)

The selection of antenna feedline is very important. Poor quality cables
should be avoided as they will result in power losses that may reduce the
range and reliability of the radio system.

Table 2 and Table 3 show the losses that will occur when using various
lengths and types of cable at 400 and 900 MHz, respectively. Regardless
of the type used, it should be kept as short as possible to minimize signal
loss.

Table 2. 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
7/8 inch HELIAX
1 1/4 inch HELIAX
1 5/8 inch HELIAX

(3.05 Meters)

0.12 dB 0.76 dB 1.51 dB 7.55 dB

0.08 dB 0.42 dB 0.83 dB 4.15 dB

0.06 dB 0.31 dB 0.62 dB 3.10 dB

0.05 dB 0.26 dB 0.52 dB 2.60 dB

50 Feet

(15.24 Meters)

100 Feet

(30.48 Meters)

500 Feet

(152.4 Meters)

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 9

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Table 3. Length vs. loss in coaxial cables at 900 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)

2.6 Data Interface Connections

The transceiver’s DATA INTERFACE connector is used to connect the
transceiver to an external DTE data terminal that supports the
RS-232-type format. The transceiver supports asynchronous data rates
of up to 9600 bps, depending on the radio’s modem setting. (See
Table 4.) The data interface speed may differ from the data rate used
over the air.

If synchronous data transmission is required, an external synchro­nous-to-asynchronous converter is required. Contact MDS for addi­tional information.

Table 4. Modem type versus speed

Modem Type Data Speeds Supported

1200 bps (Bell) Up to 1200 bps
4800 bps Up to 4800 bps
9600 bps 9600 bps

Table 5 lists each pin on the
function.

DATA INTERFACE connector and describes its

10 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

CAUTION

USE ONLY THE

REQUIRED PINS!

Do not use a 25 wire (fully pinned) interface cable for connection to the

DATA INTERFACE connector. Use only the required pins for the applica-

tion. Damage will result if improper connections are made. Typical
applications require the use of only Pins 1 through 8 for RS-232-type
signaling. When using an external modem (4-wire audio arrangement),
only Pins 7, 9, 11 and 16 are typically required.

Table 5. Data interface connector pinouts

Pin
Number

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

2INTXD—Transmitted Data. Accepts TX data from the connected

3 OUT RXD—Received Data. Outputs received data to the connected

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

5 OUT CTS—Clear-to-Send Output. Is active after the programmed

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

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

8 OUT DCD—Data Carrier Detect. Goes active when the radio

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 Inhibit. A ground on this pin places the radio into the

13 -- Do not connect—Reserved for future use.
14 -- PTT—Push to Talk. This line is used to key the radio with an

Input/
Output Pin Description

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

device.

device.

asserted.

CTS delay time has elapsed.

a 2.5 kΩ resistor.

at radio’s PC board.

detects an on-frequency signal.

external (AFSK) modem. The input impedance is 600 Ω. Use
Pin 7 for the modem’s return lead. The audio level can be
adjusted using the TXLEVEL [–20...+3, AUTO] command.

installations, but is available as a convenience. Provides +8 Vdc
through a 1 kΩ 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 Ω, and
the level is factory set to suit most installations. Use Pin 7 for the
modem’s return lead. The audio level can be adjusted using the
RXLEVEL [–20...+3] command.

“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 on-line.

active-high signal of +5 Vdc.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 11

Table 5. Data interface connector pinouts (Continued)

Pin
Number

15 OUT Remote RTU Reset. This line can be used to reset an RTU

16 -- PTT

17 -- Do not connect—Reserved for future use.
18 IN/OUT Accessory Power. Unregulated Input/Output. Provides a

19 OUT 9.9 Vdc Regulated Output. Provides a source of regulated

20 -- Do not connect—Reserved for future use.
21 OUT RSSI—Received Signal Strength Indication. A DC voltmeter

22 -- Do not connect—Reserved for future use.
23 IN Diagnostic Channel Enable. A ground on this pin causes the

24 -- Do not connect—Reserved for future use.
25 OUT Alarm. A logic low (less than 0.5 volts) on this pin indicates

Input/
Output Pin Description

from a command issued remotely with MDS InSite software.
See “Remote RTU Reset” on page 14 for additional information.

This pin can be toggled remotely, using InSite software or
locally using the radio configuration software. The required
signal levels are either a nominal +10 Vdc or –10 Vdc and the
signal source must be capable of supplying 20 ma.

—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 will trip self-resetting fuse F1 on the
transceiver PC board. The voltage at this pin will match the input
voltage to the transceiver.

voltage at 100 mA for low power accessories.

may be connected to this pin to read the relative strength of the
incoming signal. Figure 9 is a chart showing RSSI vs. DC
voltage.

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

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

3.0 OPERATION

This section contains procedures and information regarding the setup
and configuration of the transceiver.

3.1 Initial Start-up

If all parameters are correctly set, operation of the radio can be started
by following these steps:

1. Apply DC power to the transceiver.

2. Observe the LED status panel for the proper indications (Table 6).

12 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

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-

NOSTICS connector.—See TRANSCEIVER PROGRAMMING on

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

3.3 RSSI Chart

3.2 Reading LED Status Indicators

Table 6 describes the function of each status LED.

Invisible place holder

PWR DCD TXD RXD

Figure 8. LED Status Indicators

Invisible place holder

Table 6. LED status indicators

LED Name Description

PWR • Continuous—Power is applied to the radio, no faults detected.

• Rapid flash (five times-per-second)—Fault indication. Refer to

Checking for Alarms—STAT command on page 32

• Moderate flash (one time-per-second)—Internal firmware error.
Refer to Upgrading the Radio’s Software on page 37

• Off—No power is applied to the radio or the radio is in Sleep mode.
Refer to Using the Radio’s Sleep Mode on page 7

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

• Continuous—Radio is receiving a data signal from a continuously

keyed radio.

TXD An RS-232 mark signal is being received at the DATA INTERFACE.
RXD An RS-232 mark signal is being sent out from the DATA INTERFACE.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 13

3.3 RSSI Chart

As an alternative to using an HHT, the radio’s RSSI may be read with a
DC voltmeter connected to Pin 21 of the

DATA INTERFACE connector.

Figure 9 shows the relationship between received signal level and the
DC voltage on Pin 21 of the

DATA INTERFACE connector. (Note: Read-

ings are not accurate for incoming signal strengths above –50 dBm.)

Invisible place holder

5.0

4.5
4

3.5
3

2.5

+ DC VOLTS (PIN 21)

2

–110

–90

–70

–50

SIGNAL LEVEL (dBm)

Figure 9. RSSI versus DC voltage (typical)

3.4 Remote RTU Reset

Using MDS InSite software (version 4.1 or later), a command can be
issued remotely to toggle Pin 15 of the

From InSite:

1. Select the

SYSTEM (Network) DIAGNOSTICS POLLING from the main

menu.

2. Open the pull down menu

REMOTE MAINTENANCE.

DIAGNOSTICS POLLING MODE and select

3. Click on the particular remote radio that needs the RTU reset. The

REMOTE MAINTENANCE screen appears.

4. Click on RTU RESET LINE to set pin 15 to High or Low.

DATA INTERFACE connector.

14 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

3.5 Remote Maintenance and Diagnostics Levels

There are three levels of internal radio diagnostics supported in the
x710B transceivers that are set with the
levels of diagnostics are compatible with the corresponding diagnostics
levels available in the MDS 2300 and 4300 series transceivers. The
diagnostics levels are as follows:

• Mode 1—Loopback

• Mode 2—Advanced Diagnostics

• Mode 3—Remote Maintenance

DIAGLEV command. The three

Set the

DIAGLEV to mode 3 unless compatibility with a lower level of

diagnostics is required in the system.

Mode 1—Loopback

A radio set to

DIAGLEV 1 responds to a diagnostics poll containing a

four-digit number (loopback code). When the remote radio decodes its
loopback code transmitted by an MDS master station, it responds by
keying its transmitter for several seconds with a continuous modulating
tone. The radio’s signal strength and deviation can then be measured by
the master station.

Mode 2—Advanced

A radio set to

DIAGLEV 2 provides critical radio diagnostics information

over-the-air with MDS InSite or MDS 2000 software.

Mode 3—Remote Maintenance

A radio set to

DIAGLEV 3 provides all the diagnostics information avail-

able with Mode 2 enabled and also allows adjustment of several param­eters over-the-air with MDS InSite or MDS 2000 software.

4.0 TRANSCEIVER PROGRAMMING

Programming and control of the transceiver is performed through the
radio’s RJ-11
minal (MDS P/N 02-1501A01). This section contains a reference chart
(Table 8) and detailed descriptions for each user command.

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

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 15

DIAGNOSTICS connector with an MDS Hand-Held Ter-

able. REMOTE Radio Configuration Software (MDS P/N
03-3156A01) allows the transceiver to be programmed using a
personal computer. An installation booklet and on-line instruc­tions are included with the software.

4.1 Hand-Held Terminal Connection & Start-up

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

The steps below assume that the HHT has been configured for use with
the MDS x710B Transceiver (80 character screen display). If the HHT
was previously used with a different model transceiver, or if its default
settings have been changed, refer to Section 4.2 for setup details.

Follow these steps to connect the HHT:

1. Connect the HHT’s coiled cord to the

DIAGNOSTICS (RJ-11) jack on

the radio as shown in Figure 10. This automatically places the radio
into the control and programming mode.

As an alternative, the
used for programming instead of the

DATA INTERFACE (DB-25) connector may be

DIAGNOSTICS jack. With this

arrangement, Pin 23 of the HHT cable must be grounded to enable
the diagnostic channel. (See Table 5.)

2. When the HHT is connected, it runs through a brief self-check, end­ing with a beep. After the beep, press to receive the ready

ENTER

“>” prompt.

Invisible place holder

16 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

ANTENNA

13.8
VDC

+

F5

F4

E

F3

D

3

F2

C

2

F1

A

/

F

*

J

B

1

I

(

6

H

5

G

O

4

N

)

9

M

8

L

T

7

S

K

#

R

0

–

P

+

U

CTRL

Y

Q

=

,

X

W

ENTER

ACE

V

SP

ESC

BKSP

SHIFT

Z

–

Figure 10. Hand-held terminal connected to the transceiver

4.2 Hand-Held Terminal Setup

SHIFT

SPACE

The following is a set of instructions for re-initializing an HHT for use
with the transceiver. These steps may be required if the HHT was previ­ously used with a different radio, or if the HHT default settings have
been inadvertently altered.

1. Plug the HHT into the

mode by pressing the , and keys in sequence.

DIAGNOSTICS connector. Enable the setup

CTRL

The display shown in Figure 11 appears.

Invisible place holder

F1 F2 F3 F4 F5

EACBD

Figure 11. HHT set-up display

2. The first of 15 menu items will be displayed. Settings can be

E

reviewed by pressing the NEXT function controlled by the key.

Z

Parameter settings can be changed by pressing the ROLL function
controlled by the key . Exit this setup mode by pressing the key.

A Z

C

3. Set up the HHT as listed in Table 7.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 17

Table 7. HHT Operational Settings

Parameter Setting Parameter Setting

Re-init HT NO Scroll On 33rd
Baud Rate 1200 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

5.0 TRANSCEIVER COMMANDS

Table 8 is a reference chart of software commands for the transceiver.
Programmable information is shown in brackets [ ] following the com­mand name. See Section 5.4 for detailed command descriptions. Some
of the commands and functions are optional. Therefore, the transceiver
may not have all of the following commands and functions available.

5.1 General Command Information

The proper procedure for entering commands is to type the command,
followed by an keystroke. For programming commands, the
command is followed by and the appropriate information or
values, then . Many commands will display the current setting if
the command is entered without the value.

Example:

ENTER

SPACE

ENTER

1. Type

PWR 27 . This sets the power output to +27 dBm.

2. Type PWR . The HHT displays PWR 27 dBm.

ENTER

ENTER

Here are some additional points to remember when using the HHT:

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

SHIFT

mode.

• Flashing square cursor ( ) – letter mode is selected.

• Flashing superscript rectangular cursor ( ) – number mode is

selected.

• Use key to edit information or commands entries.

ESC/BKSP

Error Messages

Listed below are some of the most common error messages encountered
when using the HHT:

UNKNOWN COMMAND—The command was not recognized.
INCORRECT ENTRY—The command format or the values entered were

not valid.

COMMAND F AILED—The requested action could not be completed. There

may be a problem with the software; contact MDS.

NOT PROGRAMMED—The software was unable to program the EEPROM,

or the requested display item was not programmed. This is a serious
internal radio error; contact MDS.

TEXT TOO LONG—Too many characters were entered.

18 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

NOT AVAILABLE—The entered command or parameter was valid, but it

referred to a currently unavailable choice.

PASSWORD INVALID—The entered password was invalid, and was not

accepted.

ACCESS DENIED—The command is invalid for the current password

level.

EEPROM FAILURE—The INIT command is unable to write to EEPROM.

This is a serious internal error; contact MDS.

5.2 Command Summary

Table 8 is a command list applicable to the MDS x710 radios. Table 9
is a list of the Local Maintenance commands that can be used to adjust
items such as operating frequency. These tables are summaries only.
Refer to 5.4 Detailed Command Descriptions for more comprehensive
information regarding the use of each command.

Invisible place holder

Table 8. Operating parameter commands

Command name Function

BAUD [9600 abc] Details

page 22

CTS [0–255] Details page 23Set or display the Clear-to-Send delay in

DIAGLEV [OFF, 1,2,3]

Details page 23

DKEY Details page 24 Dekey the radio (transmitter OFF). This is

DP Details page 24 Local maintenance command that decrements

DSTE Details page 24 Disable the Squelch Tail Eliminator function.
DUMP Details page 24 Display all programmable settings.
EMP [ON, OFF] Details

page 24

ESTE Details page 24 Enable the Squelch Tail Eliminator function.
HREV Details page 25 Display the Hardware Revision level.
INIT Details page 25 Set radio parameters to the default values
KEY Details page 26 Key the radio (transmitter ON), This is generally a

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

milliseconds.
Set or display the diagnostics level compatible

with the MDS 2300 and 4300 Series radios.

generally a radio test command.

transmit power.

Display or change the emphasis/de-emphasis
characteristics of the radio.

radio test command.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 19

LBC [xxxx] Details page

26

MODEL Details page 26 Display the Model number of the radio.

Set or display the loopback code of the radio.

Table 8. Operating parameter commands(Continued)

Command name Function

MODEM [NONE, BELL,

4800B, 9600B] Details

page 26

Set or display the modem type used in the radio.
None indicates an analog input.

OWM [XXX...] Details

page 27

OWN [XXX...] Details

page 27

PTT [0–255] Details page 27Set or display the Push-to-Talk delay in

PWR [20–37] Details

page 27

RSSI Details page 28 Display the Received Signal Strength Indication.
RTU [ON/OFF/0-80]

Details page 28

RX [xxx.xxxxx] Details

page 28

RXLEVEL [–20...+3]

Details page 28

SCD [0-255] Details page 29Set or display the Soft-carrier Dekey delay in

SER Details page 29 Display the radio serial number.
SHOW [DC, PORT, PWR]

Details page 29

SREV Details page 29 Display the Software Revision Level

Set or display the owner’s message.

Set or display the owner’s name.

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 analog audio receive level in
dBm.

milliseconds.

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

STAT Details page 29 Display radio status and alarms
STE Details page 30 Display whether the Squelch-Tail Eliminator is ON

SWC [ON, OFF] Details

page 30

TEMP Details page 30 Display the internal temperature of the radio in

TOT [1-255 ON/OFF]

Details page 31

TX [xxx.xxxxx] Details

page 31

TXLEVEL [–20...+3,

AUTO] Details page 31

or OFF.
Set or display the master station carrier mode.

degrees C.
Set or display the Time-out Timer delay in

seconds.
Set or display the transmit frequency.

Set or display the analog audio transmit level in
dBm.

20 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

Table 9. Local maintenance commands

Command name Function

Invisible place holder

DECF [0–100] Details

page 23

DECP [0–100] Details

page 23

DF Details page 23 Local maintenance command that decrements

IF Details page 25 Local maintenance command that increments

INCF [1–99] Details

page 25

INCP [1–99] Details

page 25

IP Details page 26 Local maintenance command that increments the

RMIS Details page 27 Local maintenance command that resets and stores

RMOV Details page 27 Local maintenance command that resets the

RMRD Details page 28 Local maintenance command that displays the

RMST Details page 28 Local maintenance command that stores the

Local maintenance command that decrements both
the transmit and receive frequency by specified
amount.

Local maintenance command that decrements
transmit power by specified amount.

frequency.

frequency.
Local maintenance command that increments both

the transmit and receive frequency by the specified
amount.

Local maintenance command that increments the
transmit power by the specified amount.

transmit power.

the transmit power and frequency to mid-range.

transmit power and frequency to previously values.

transmit power and frequency.

transmit power and frequency.

5.3 Command Equivalents for Older Transceivers

There are several programming commands used with earlier trans­ceivers that also function with the MDS x710B. Table 10 lists these
commands along with cross references to their equivalents in the MDS
x710B command set. In these instances, either the new or old command
may be used.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 21

Invisible place holder

Table 10. Command equivalents for older transceivers

Older Transceiver
Command

PCTS See CTS [0–255] Details page 23
PPTT See PTT [0–255] Details page 27
PSCD See SCD [0-255] Details page 29
FRQ See RX [xxx.xxxxx] Details page 28

PTX See TX [xxx.xxxxx] Details page 31
PRX See RX [xxx.xxxxx] Details page 28
PTOT See TOT [1-255 ON/OFF] Details page 31
SV See SHOW [DC, PORT, PWR] Details page 29
FPWR See SHOW [DC, PORT, PWR] Details page 29

MDS 4710B & 9710B
Equivalent Command

and TX [xxx.xxxxx] Details page 31

5.4 Detailed Command Descriptions

The only critical radio configuration for most applications is setting the
operating frequencies (
command for switched carrier operation, if required. However, proper
use of additional commands allow you to tailor the transceiver for a spe­cific use, or conduct diagnostics on the radio. This section gives more
detailed information for the user commands previously listed in Table 8.

RX xxx.xxxxx, TX xxx.xxxxx) and setting the SWC

In many cases, the commands shown here can be used in two ways.
First, you can type only the command name to view the currently pro­grammed data. Secondly, you can set or change the existing data by
typing the command, followed by a space, and then the desired entry. In
the list below, allowable programming variables, if any, are shown in
brackets following the command name.

The

INIT command can be used to set many commands to the default

values.

BAUD [9600 abc]

This command is only valid for radios that have the
set to

9600B and the only allowable baud rate is 9600 bps. However, the

MODEM command

data format can be specified with this command.
This command sets (or displays) the communication attributes for the

DATA INTERFA CE port. It has no effect on the RJ-11 DIAGNOSTICS port.

Refer to MODEM [NONE, BELL, 4800B, 9600B] on page 26 for addi­tional information.

The first parameter (

9600) is baud rate.

22 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

The second parameter of the BAUD command (abc) is a 3-character block
indicating how the data is formatted.

a = Data bits (7 or 8)
b = Parity (N for None, O for Odd, E for Even)
c = Stop bits (1 or 2)

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

not supported by the transceiver.

CTS [0–255]

The

CTS (clear-to-send) command selects or displays the timer value

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

For DCE operation, the timer specifies how long to wait after the RTS
line goes high, before asserting the CTS line. A timer value of zero
means that the CTS line will be asserted immediately.

DECF [0–100]

The

DECF (decrease frequency) is a local maintenance command that

decreases both the transmit and receive frequency by the specified per­centage of the adjustable range. This is a temporary setting until the

RMST command is used to store the command.

DECP [0–100]

The DECP (decrease power) is a local maintenance command that
decreases the transmit power by the percentage specified of the adjust­able range. This is a temporary setting until the

RMST command is used

to store the command.

DF

The

DF (decrement frequency) is a local maintenance command that

decreases both the transmit and receive frequency by 1% of the adjust­able range. This is a temporary setting until the

RMST command is used

to store the command.

DIAGLEV [OFF, 1,2,3]

This command sets the diagnostics level used in the transceiver.

OFF

indicates no diagnostics capabilities are available.

• Mode 1 (Standard Diagnostics) is indicated by 1.

• Mode 2 (Advanced Diagnostics) is indicated by

• Mode 3 (Remote Maintenance) is indicated by

2.

3.

Set

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 23

DIAGLEV to the diagnostics mode currently used in the radio system.

DKEY

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

KEY command.

DP

DP (decrement power) command is a local maintenance command

The
that decreases the transmit power by 1% of the adjustable range. This is
a temporary setting until the

RMST command is used to store the com-

mand.

DSTE

This command disables the radio’s squelch tail eliminator (STE) circuit
and is only applicable when the

MODEM command is set to BELL. The

squelch tail eliminator mutes the noise burst at the end of a transmit
cycle which prevents the master station receiver from receiving the burst
of noise as the squelch closes. The squelch-tail eliminator adds 5 ms to
the transmission time. To enable the squelch tail eliminator use the
command. Use the

STE command to determine if the squelch tail elimi-

nator is ON (enabled) or OFF (disabled). If the remote radio has
the master station receiver(s) must also have the

STE set to ON.

ESTE

STE ON,

DUMP

This command displays all the programmed settings with this one com­mand. 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 sets and displays whether the emphasis and de-emphasis
of the analog input and output signals is enabled.
emphasis and de-emphasis is enabled and

OFF indicates that emphasis

ON indicates that

and de-emphasis is disabled.
Emphasis is a function used in older analog radios where the modulating

signal is increased (at the transmitter) at the higher frequencies to
increase system performance. De-emphasis compensates (at the
receiver) for a signal that has had emphasis applied.

Emphasis and de-emphasis functions should not be enabled except
when compatibility with older MDS analog radios is required.

ESTE

This command enables the radio’s squelch tail eliminator (STE) circuit
and is only applicable when the
squelch tail eliminator mutes the noise burst at the end of a transmit
cycle which prevents the master station receiver from receiving the burst

24 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

MODEM command is set to BELL. The

of noise as the squelch closes. The squelch-tail eliminator adds 5 ms to
the transmission time. To disable the squelch tail eliminator use the

DSTE command. Use the STE command to determine if the squelch tail

eliminator is ON (enabled) or OFF (disabled). If the remote radio has

STE ON, the master station receiver(s) must also have the STE set to ON.

HREV

This command displays the transceiver’s hardware revision level.

IF

The

IF (increment frequency) command is a local maintenance com-

mand that increases both the transmit and receive frequency by 1% of
the adjustable range. This is a temporary setting until the

RMST com-

mand is used to store the command.

INCF [1–99]

The

INCF (increase frequency) command is a local maintenance com-

mand that increases both the transmit and receive frequency by the spec­ified amount of the adjustable range. This is a temporary setting until the

RMST command is used to store the command.

INCP [1–99]

The

INCP (increase power) command is a local maintenance command

that increases the transmit power by the specified amount of the adjust­able range. This is a temporary setting until the

RMST command is used

to store the command.

INIT

INIT command is used to re-initialize the radio’s operating parame-

The
ters to the factory defaults. This may be helpful when trying to resolve
configuration problems that may have resulted from the entry of one or
more improper command settings. If you are unsure of which command
setting may have caused the problem, this command allows you to get
back to a known working state. The following changes to the radio are
made when

INIT is entered:

• CTS command is set to 10

PTT command is set to 0

•

• SCD command is set to 0

TOT command is set to 30 seconds and set to ON

•

All other commands stay in the previously established setting.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 25

• PWR command is set to +37 dBm (5 watts)

IP

IP (increment power) command is a local maintenance command

The
that increases the transmit power by 1% of the adjustable range. This is
a temporary setting until the

RMST command is used to store the com-

mand.

KEY

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

LBC [xxxx]

This command programs or displays the loopback code of a radio. The
loopback code provides a means to uniquely identify a single radio
within a network. It is used primarily for diagnostic purposes, and is
intended to be identical to the loopback code command of older trans­ceivers.

By default it is set to the last 4 digits of the serial number. See

SER com-

mand. Loopback codes can range from 0...9999.

MODEL

This command displays the radio’s model number code. Refer to
Figure 4 on page 4 for an explanation of the model number characters.

MODEM [NONE, BELL, 4800B, 9600B]

This command sets the signal type and modulation mode of the radio.
The radio may not have all options available. Contact MDS if you need
a modem that is currently unavailable on the radio.

A choice of

NONE selects no modem and the radio operates as an analog

transceiver using Transmit Audio Input (Pin-9) and Receive Audio
Output (Pin-11). Refer to Table 5 for

DATA INTERFACE connector

pinouts.
A choice of

BELL selects a Bell 202T type of analog modem that is com-

patible with the MDS 1000µ, MDS 2310, or the MDS 4310 series of
radio products equipped with a 1200 bps Bell 202T modem. All baud
rates up to 1200 are automatically supported as data is received. The

BAUD command setting is irrelevant.

The choice of 4800B selects a 4800 bps modem modulation compatible
with the MDS 1000µ, MDS 2310, or the MDS 4310 series of radio prod­ucts equipped with a 4800 bps modem. All baud rates up to 4800 are
automatically supported as data is received. The
is irrelevant.

The choice of
with the MDS 1000µ, MDS 2310, or the MDS 4310 series of radio prod-

26 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

BAUD command setting

9600B selects a 9600 bps modem modulation compatible

ucts equipped with a 9600 bps modem. When 9600B is selected, the BAUD
command is automatically set to 9600 bps.

OWM [XXX...]

This is a command to display or program an owner’s message. To pro-
gram the owner’s message, type

ENTER

.

OWM then the message, followed by

To display the owner’s message, type

OWM then . The owner’s

ENTER

message appears on the display.

OWN [XXX...]

This is a 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

ENTER

ENTER

name appears on the display.

PTT [0–255]

This command sets or displays the key-up delay in milliseconds.
This timer specifies how long to wait after the radio receives a key signal

from either the PTT or RTS lines (on the Data Interface), before actually
keying the radio.

PWR [20–37]

This command displays or sets the desired RF forward output power set­ting of the radio. The

PWR command parameter is specified in dBm and

can range from 20 through 37. The default setting is 37 dBm (5 watts).
To read the actual (measured) power output of the radio, use the

PWR

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

SHOW

7.5.

RMIS

This local maintenance command initializes the current settings to the
midpoint or 50% for the following local maintenance settings.

RMOV

This command restores the old values (after the last
the following remote maintenance settings.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 27

• Power

• Frequency

RMST command) for

• Power

• Frequency

RMRD

This command reads the current settings of the following remote main­tenance settings.

• Power

• Frequency

RMST

This command stores the current settings of the following remote main­tenance settings.

• Power

• Frequency

RSSI

This command displays the radio’s Received Signal Strength Indication
(RSSI) in dBm units. Incoming signal strengths from –50 dBm to –120
dBm can be read.

RTU [ON/OFF/0-80]

This command re-enables or disables the radio’s internal RTU simu­lator, which runs with MDS’ proprietary polling programs (poll.exe and
rsim.exe). The internal RTU simulator is available whenever a radio has
diagnostics enabled. This command also sets the RTU address that the
radio will respond to.

The internal RTU can be used 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.

RX [xxx.xxxxx]

This command selects or displays the radio’s receive frequency in MHz.
The frequency step size is normally 6.25 kHz. However, other fre­quency step sizes are available on request. Refer to Figure 4 on page 4
for the allowable frequency range. Note: A large change in frequency
(more than 5 MHz) requires adjustment of the receiver helical filters for
maximum RSSI. See 7.2 Helical Filter Adjustment for details.

RXLEVEL [–20...+3]

This command sets the analog output gain compatible with a received
signal with 2.5 kHz deviation. The values are in dBm. This function is
used when the radio is set in analog operating mode with the

NONE command.

MODEM

This setting is accurate to ±1 dBm.

28 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

The factory default is RXLEVEL –10.

SCD [0-255]

This command displays or changes the soft-carrier dekey delay in milli­seconds.

This timer specifies how long to wait after the removal of the keying
signal before actually releasing the transmitter. A value of 0 millisec­onds unkeys the transmitter immediately after the removal of the keying
signal. Some protocols require a delay before unkeying the transmitter
after the data has been sent to indicate the end of transmission.

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

SREV

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

STAT

This command displays the current alarm status of the transceiver.

If no alarms exist, the message

NO ALARMS PRESENT appears at the top

of the HHT display.

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

If more than one alarm exists, the word
the screen and additional alarms are viewed by pressing the key.
Detailed descriptions of alarm codes are provided in Table 11 on
page 33.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 29

MORE appears at the bottom of

ENTER

STE

This command displays the state of the squelch tail eliminator, either
ON (enabled) or OFF (disabled). This function is only applicable when
the

MODEM command is set to BELL.

The squelch tail eliminator mutes the noise burst at the end of a transmit
cycle which prevents the master station receiver from receiving the burst
of noise as the squelch closes. The squelch-tail eliminator adds 5 ms to
the transmission time. To disable the squelch tail eliminator use the

DSTE command. To enable the squelch tail eliminator use the ESTE com-

mand.
If the remote radio has

have the

STE set to ON.

STE ON, the master station receiver(s) must also

SWC [ON, OFF]

This command sets the master station carrier mode. If the transceiver is
intended to be used with a master station that has the carrier switched on
and off and is not continuously keyed, set
ceiver is used with a continuously keyed master station,
set to

OFF. The default setting is OFF.

SWC to ON. When the trans-

SWC should be

NOTE: If SWC is set to ON and the radio is being used with an MDS

2100 or 4100 series master station, it is important to set CTS to
at least 20 milliseconds for proper system operation.

To use an MDS x710 as a master radio, set

SWC to ON.

If the x710B radio is used in a system that has an x710B radio operating
as a master, all radios in the system must have

SWC set to ON.

Refer to Continuously Keyed versus Switched Carrier Operation on
page 2 and Single Frequency (Simplex) Operation on page 3 for addi-

tional information.

TEMP

This command displays the internal temperature of the transceiver in
degrees Celsius. Refer to Figure 12 for a Celsius to Fahrenheit conver­sion graph.

30 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

-22˚

-4˚

14˚

32˚ 50˚

Invisible place holder

FAHRENHEIT
68˚ 86˚ 104˚

122˚

140˚ 158˚

176˚

194˚

-30˚

-20˚ -10˚

0˚ 10˚

20˚ 30˚

CELSIUS

40˚

50˚

60˚

70˚

80˚

90˚

Figure 12. Celsius to Fahrenheit Conversion

TOT [1-255 ON/OFF]

This command sets or displays the transmitter Time-out Timer value
(1–255 seconds), as well as the timer status (
on, and the radio remains keyed for a longer duration than the

ON or OFF). If the timer is

TOT value,

the transmitter is automatically unkeyed. This function prevents radios
that are erroneously keyed from tying up the system frequency.

When this happens, the radio must be commanded back to an unkeyed
state before a new keying command will be accepted. The default timer
value is 30 seconds.

TX [xxx.xxxxx]

This command selects or displays the radio’s transmit frequency in
MHz. The frequency step size is normally 6.25 kHz. However, other fre­quency step sizes are available on request. Refer to Figure 4 on page 4
for the allowable frequency range.

The factory default for transmit frequency is set to the center of the oper­ating band of the radio.

TXLEVEL [–20...+3, AUTO]

This command sets the analog input gain to modulate the transmitter at
optimum peak deviation. The values are in dBm. If

AUTO is selected, the

input signal level is sensed and amplified as required to provide the
radio’s operating deviation. This function is used when the radio is set
in analog operating mode with the

MODEM NONE command.

This setting is accurate to ±1 dBm.
The factory default is

TXLEVEL AUTO.

6.0 TROUBLESHOOTING

Successful troubleshooting of the radio system is not difficult, but it
requires a logical approach. It is best to begin troubleshooting at the
master station, as the rest of the system depends on the master for
polling commands. If the master station has problems, the operation of
the entire network can be compromised.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 31

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 & 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 may be
degraded.)

• Proper programming of the transceiver’s operating parameters
(see 4.0 TRANSCEIVER PROGRAMMING).

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

6.1 LED Status Indicators

The LED status indicators are an important troubleshooting tool and
should be checked whenever a problem is suspected. Table 6 on page 13
describes the function of each status LED.

6.2 Event Codes

When an alarm condition exists, the transceiver creates a code that can
be read on an HHT connected to the
be very helpful in resolving many system difficulties. To check for the
presence of alarms, enter

STAT on the connected HHT. Refer to Table 11

for a definition of the event codes.

Checking for Alarms—STAT command

To check for alarms, enter
sage

NO ALARMS PRESENT appears at the top of the display (Figure 13).

STAT on the HHT. If no alarms exist, the mes-

DIAGNOSTICS port. These codes can

32 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

Invisible place holder

Figure 13. HHT display in response to STAT command

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

If more than one event exists, the word
the screen. To view additional events, press .

MORE appears at the bottom of

ENTER

Major Alarms vs. Minor Alarms

Major Alarms—report serious conditions that generally indicate a hard­ware failure, or other abnormal condition that will prevent (or seriously
hamper) further operation of the transceiver. Major alarms generally
indicate the need for factory repair. Contact MDS for further assistance.

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

Event Code Definitions

Table 11 contains a listing of all event codes that may be 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.
03 Major Authorization fault. Contact MDS.
04 Major One or both of the internal programmable synthesizer loops is

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

Alarm
Type Description

reporting an out-of-lock condition.

a failure. The radio will not operate.

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 33

Table 11. Event codes (Continued)

Event
Code

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 the

11–15 -- Not used.
16 Minor Not used.
17 Minor A data parity fault has been detected on the DATA INTERFACE

18 Minor A data framing error has been detected on the DATA

20 Minor Configuration error. An invalid parameter configuration exists.

19–24 -- Not used.
25 Minor The 5.6 volt 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 far

27, 28 -- Not used
31 Minor The transceiver’s internal temperature is approaching an

Alarm
Type Description

calibration is required for proper radio operation.

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

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

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

This may be caused by an invalid modem choice.

excessive, operation may fail.

out of tolerance, operation may fail.

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

7.0 TECHNICAL REFERENCE

7.1 Transceiver Specifications

TRANSMITTER

Frequency Range: 380–512 MHz (MDS 4710B)

Frequency Increments: 6.25 kHz or 5 kHz (Factory Configurable)
Modulation Type: Binary CPFSK
Audio Input Level: –20 to +5 dBm
Carrier Power: Maximum: 5 watts (+37 dBm)

Duty Cycle: Continuous
Output Impedance: 50 ohms (Ω)
Frequency Stability: 1.5 ppm, –30 to +60 degrees Celsius
Channel Spacing: 12.5 kHz
Spurious & Harmonic: –65 dBc per EIA test specification
Time-out Timer: 1–255 seconds
Transmitter Keying: RTS

34 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

800–960 MHz (MDS 9710B)

(See Figure 4 on page 4 for hardware band limits)

Minimum: 0.1 watts (+20 dBm)

Response Time: 5 ms
Max. FM modulation: ±2.5 kHz

RECEIVER

Type: Double conversion superheterodyne
Frequency Range: 380–512 MHz (MDS 4710B)

Frequency Increments: 6.25 kHz or 5 kHz (Factory Configurable)
Frequency Stability: 1.5 ppm, –30 to +60 degrees Celsius
Sensitivity: 12 dB SINAD at –110 dBm
Spurious & Image Rejection: 85 dB minimum
Intermodulation

Response Rejection: 75 dB minimum per EIA specification
Selectivity: 65 dB minimum at adjacent channel
Bandwidth: 12.5 kHz
Desensitization: 65 dB minimum, 12.5 kHz channel
Bit-Error Rates: 1200 bps: 1 x 10–6 at –110 dBm

800–960 MHz (MDS 9710B)

(See Figure 4 on page 4 for hardware band limits)

4800 bps: 1 x 10–6 at –110 dBm
9600 bps: 1 x 10–6 at –108 dBm

PRIMARY POWER

Voltage: 13.8 Vdc Nominal (10.5 to 16 Vdc)
TX Supply Current: 1.8 A nominal, 2.5 A maximum
RX Supply Current: 150 mA (less than 16 mA in Sleep mode)
Power Connector: 2-pin polarized locking connector
Circuit Protector: 4 Amp, Self-Resetting Fuse, Internal

Reverse Polarity Protection: Diode across primary input

(Remove Primary Power to Reset)

DATA INTERFACE

Signaling Standard: RS-232
Connector: DB-25 (shared with data port), RJ-11 (separate)
Data Interface Rates: Bell 202T (1200 bps) modem—up to 1200 bps

Data Latency: 10 milliseconds maximum

4800 bps modem—up to 4800 bps
9600 bps modem—9600 bps only

ENVIRONMENTAL

Humidity: 95% at 40 C
Temperature Range: –30 to 60 C
Weight: 3.5 pounds (1.6 kilograms)
Size: Refer to Figure 6.
Case: Die-cast aluminum

7.2 Helical Filter Adjustment

If the receive frequency of the radio is changed more than 5 MHz, the
helical filters should be adjusted for maximum received signal strength
indication (RSSI). To adjust the filters, proceed as follows:

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 35

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 14 (MDS
4710B) or Figure 14 (MDS 9710B) as appropriate.

3. Apply a steady signal to the radio at the programmed receive fre­quency (–80 dBm level recommended; no stronger than –60 dBm).
This should be done with a signal generator.

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

• With an HHT (See 4.0 TRANSCEIVER PROGRAMMING).

• With MDS Radio Configuration Software (See 7.3 Using PC

Software with the Radio).

• With a voltmeter connected to Pin 21 of the

INTERFACE connec-

tor (See 3.3 RSSI Chart).

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

U104

U202

FRONT PANEL

OF RADIO

U203

HELICAL

ADJUSTMENTS

J301

U101

SHIELD
COVER

Figure 14. MDS 4710B helical filter locations

Invisible place holder

U104

36 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

U202

HELICAL

J301

U203

U101

SHIELD
COVER

FRONT PANEL

OF RADIO

ADJUSTMENTS

Figure 15. MDS 9710B helical filter locations

7.3 Using PC Software with the Radio

Windows-based Radio Configuration software is available (MDS P/N
03-3156A01) to allow diagnostics and control of the transceiver using a
personal computer. The software package also allows you to upgrade
the radio’s internal software when new features become available from
Microwave Data Systems.

The current software version includes functionality for MDS x710B
Transceivers and includes on-line user instructions. An installation
booklet is provided with the software package. Contact MDS for
ordering information.

Connecting a PC

To connect a PC to the radio’s

DIAGNOSTICS port, an RJ-11 to DB-9

adapter (MDS P/N 03-3246A01) is required. If desired, an adapter cable
may be constructed using the information shown in Figure 16.

Upgrading the Radio’s Software

Using the Radio Configuration software, select

UPGRADE

under the SYSTEM menu. Follow the prompts and on-line

RADIO SOFTWARE

instructions to determine how to proceed.
Software upgrades are distributed as ASCII files with a “.S28” exten-

sion. These files use the Motorola S-record format. When the download
is activated, the radio’s

PWR LED will flash rapidly confirming that a

download is in process. The download takes about two minutes.

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

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

Invisible place holder

RJ-11 PLUG

(TO RADIO)

TXD

4

DB-9 FEMALE

(TO COMPUTER)

RXD

2

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 37

1

6

RJ-11 PIN LAYOUT

RXD

5

GND

6

TXD

GND

Figure 16. RJ-11 to DB-9 adapter cable

(for PC Diagnostics & Control)

3
5

7.4 Bench Testing Set-up

Figure 17 shows a sample test setup that can be used to verify the basic
operation of MDS x710B radios. This test can be performed with any
number of remote radios by using a power divider with the appropriate
number of output connections.

The RTU simulator shown in the test setup (MDS Part No. 03-2512A01)
is a microcontroller that emulates a remote terminal unit operating at
1200, 2400, 4800, or 9600 bps. Custom software is supplied with the
RTU simulator that allows continuous polling of remote radios. The
software reports the number of polls sent, polls received, and the number
of errors detected. The software runs on an IBM-compatible personal
computer connected to the

DIAGNOSTICS port on the master station.

CAUTION

POSSIBLE

EQUIPMENT

DAMAGE

It is very important to use attenuation between all units in the test setup.
The amount of attenuation required depends on the number of units
being tested and the desired signal strength (RSSI) at each transceiver
during the test. In no case should a signal greater than –50 dBm be
applied to any radio in the test setup.

Invisible place holder

COMPUTER RUNNING MDS

"POLL.EXE" PROGRAM

ORDER

WIRE

SIDE B
POWER

MASTER STATION

POWER ATTENUATORS

• Fixed or adjustable

• 5W Minimum Rating

REMOTE

ANTENNA

.8
3

1

VDC

+

–

RTU SIMULATORS
MDS P/N 03-2512A01

REMOTE

ANTENNA

.8
3

1

VDC

+

–

REMOTE

REMOTE

ANTENNA

13.8

VDC

–

+

ANTENNA

13.8

VDC

–

+

POWER DIVIDER

NON-RADIATING ATTENUATOR

• Install on any unused divider ports

• 5W Minimum Rating

38 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

Figure 17. Bench test set-up

7.5 dBm-Watts-Volts Conversion Chart

Table 12 is provided as a convenience for determining the equivalent
wattage or voltage of an RF power expressed in dBm.

Table 12. dBm-watts-volts conversion—for 50 ohm systems

dBm V Po

+53 100.0 200W
+50 70.7 100W
+49 64.0 80W
+48 58.0 64W
+47 50.0 50W
+46 44.5 40W
+45 40.0 32W
+44 32.5 25W
+43 32.0 20W
+42 28.0 16W
+41 26.2 12.5W
+40 22.5 10W
+39 20.0 8W
+38 18.0 6.4W
+37 16.0 5W
+36 14.1 4W
+35 12.5 3.2W
+34 11.5 2.5W
+33 10.0 2W
+32 9.0 1.6W
+31 8.0 1.25W
+30 7.10 1.0W
+29 6.40 800mW
+28 5.80 640mW
+27 5.00 500mW
+26 4.45 400mW
+25 4.00 320mW
+24 3.55 250mW
+23 3.20 200mW
+22 2.80 160mW
+21 2.52 125mW
+20 2.25 100mW
+19 2.00 80mW
+18 1.80 64mW
+17 1.60 50mW
+16 1.41 40mW
+15 1.25 32mW
+14 1.15 25mW
+13 1.00 20mW
+12 .90 16mW
+11 .80 12.5mW
+10 .71 10mW
+9 .64 8mW
+8 .58 6.4mW
+7 .500 5mW
+6 .445 4mW
+5 .400 3.2mW
+4 .355 2.5mW
+3 .320 2.0mW
+2 .280 1.6mW
+1 .252 1.25mW

dBm V Po

0 .225 1.0mW

-1 .200 .80mW

-2 .180 .64mW

-3 .160 .50mW

-4 .141 .40mW

-5 .125 .32mW

-6 .115 .25mW

-7 .100 .20mW

-8 .090 .16mW

-9 .080 .125mW

-10 .071 .10mW

-11 .064

-12 .058

-13 .050

-14 .045

-15 .040

-16 .0355

dBm mV Po

-17 31.5

-18 28.5

-19 25.1

-20 22.5 .01mW

-21 20.0

-22 17.9

-23 15.9

-24 14.1

-25 12.8

-26 11.5

-27 10.0

-28 8.9

-29 8.0

-30 7.1 .001mW

-31 6.25

-32 5.8

-33 5.0

-34 4.5

-35 4.0

-36 3.5

-37 3.2

-38 2.85

-39 2.5

-40 2.25 .1µW

-41 2.0

-42 1.8

-43 1.6

-44 1.4

-45 1.25

-46 1.18

-47 1.00

-48 0.90

dBm mV Po

-49 0.80

-50 0.71 .01µW

-51 0.64

-52 0.57

-53 0.50

-54 0.45

-55 0.40

-56 0.351

-57 0.32

-58 0.286

-59 0.251

-60 0.225 .001µW

-61 0.200

-62 0.180

-63 0.160

-64 0.141

dBm µV Po

-65 128

-66 115

-67 100

-68 90

-69 80

-70 71 .1nW

-71 65

-72 58

-73 50

-74 45

-75 40

-76 35

-77 32

-78 29

-79 25

-80 22.5 .01nW

-81 20.0

-82 18.0

-83 16.0

-84 11.1

-85 12.9

-86 11.5

-87 10.0

-88 9.0

-89 8.0

-90 7.1 .001nW

-91 6.1

-92 5.75

-93 5.0

-94 4.5

-95 4.0

-96 3.51

-97 3.2

dBm µV Po

-98 2.9

-99 2.51

-100 2.25 .1pW

-101 2.0

-102 1.8

-103 1.6

-104 1.41

-105 1.27

-106 1.18

dBm nV Po

-107 1000

-108 900

-109 800

-110 710 .01pW

-111 640

-112 580

-113 500

-114 450

-115 400

-116 355

-117 325

-118 285

-119 251

-120 225 .001pW

-121 200

-122 180

-123 160

-124 141

-125 128

-126 117

-127 100

-128 90

-129 80 .1ƒW

-130 71

-131 61

-132 58

-133 50

-134 45

-135 40

-136 35

-137 33

-138 29

-139 25

-140 23 .01ƒW

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 39

40 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

INDEX

A

ACCESS DENIED error message 19
Accessories

Radio Configuration Software 4
Synchronous to Asynchronous Data Converter 4
TTL Converter Assembly 4

Accessory Power, interface connection for (Pin 18) 12
Advanced diagnostic mode 15
Alarms

checking using STAT command 32
descriptions 33
indicators 32
interface connection for (Pin 25) 12
major vs. minor 33

Antennas 9

feedline, loss by cable length and type 9
feedline, selection of 9
Yagi 9

Applications

Multiple Address System (MAS) 1
point-to-point system 2

Audio level

input (TXLEVEL command) 31
output (RXLEVEL command) 28

B

BAUD command 22
Bench testing (radio performance) 38

C

Carrier mode, set for master station (SWC command) 30
Cautions

do not use a 25-wire interface cable 11
use attenuation between all units in test set-up 38

Charts. See Summaries/charts
Clear-to-send (timer setting, CTS command) 23
Command descriptions

BAUD (display/change data communications parameters) 22
CTS (display/change clear-to-send timer setting) 23
DECF (decrease transmit frequency). See also INCF 23
DECP (decrease transmit power). See also INCP 23
DF (decrement transmit frequency by 1%). See also IF 23
DIAGLEV (set diagnostics level) 23
DKEY (deactivates transmitter after KEY). See also KEY 24
DP (decrease transmit power by 1%). See also IP 24
DSTE (disable STE circuit). See also ESTE 24
DUMP (display all settings) 24

EMP (enable/disable emphasis & de-emphasis) 24
ESTE (enable STE circuit). See also DSTE 24
HREV (display hardware rev level). See also SREV 25
IF (increment transmit frequency by 1%). See also DF 25
INCF (increase transmit frequency). See also DECF 25
INCP (increase transmit power). See also DECP 25
INIT (initialize radio to factory defaults) 25
IP (increase transmit power by 1%). See also DP 26
KEY (activate transmitter) 26
LBC (display/change loopback code) 26
MODEL (display radio model number) 26
MODEM (set signal type and modulation mode) 26
OWM (display/change owner’s message) 27
OWN (display/change owner’s name) 27
PTT (display/change key-up delay) 27
PWR (display/change RF forward output power) 27
RMIS (reset power/frequency to 50%) 27
RMOV (restore previous power/frequency values) 27
RMRD (display power/frequency settings) 28
RMST (store current power/frequency settings) 28
RSSI (display RSSI) 28
RX (display/change receive frequency) 28
RXLEVEL (set analog output gain for optimum peak deviation).

See also TXLEVEL

SCD (display/change dekey delay) 29
SER (display radio serial number) 29
SHOW (display DC voltage, data port, RF power) 29
SREV (display current software version). See also HREV 29
STAT (display alarm status) 29
STE (display STE state) 30
SWE (set master station carrier mode) 30
TEMP (display internal temperature) 30
TOT (display/change time-out period) 31
TX (display/change transmit frequency) 31
TXLEVEL (set analog input gain for optimum peak deviation). See

also RXLEVEL

COMMAND FAILED error message 18
Commands 18

detailed descriptions 22–31
equivalents for older transceivers 21
error messages resulting from 18
example of entering using HHT 18
RTU (enable/disable internal RTU) 28
summary (quick reference chart) 19

Communications problems. See Troubleshooting
Compatibility

with earlier MDS products
with UK MPT 1411 specifications 1

Computer, use of

for radio configuration
for software upgrade 37

Configuration codes. See Model number codes 3

28

31

1

15

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide I-1

Connections

antenna/feedline
basic steps for making 6
data interface 10–12
hand-held terminal (HHT) 16
PC 37
power 8
RTU simulator (bench test set-up) 38
voltmeter (for reading RSSI) 14

Conversions

Celsius to Fahrenheit
RF power (dBm) to watts or volts 39

CTS

command
interface connection for (Pin 5) 11

9

31

23

D

Data interface

caution against using 25-wire interface cable
connections 10–12
specifications 35
speed of various modem types 10

Data transfer rates by modem type 10
DC input. See Power input
DCD

LED 13
LED, interface connection for (Pin 8) 11

DECF command 23
DECP command 23
Defaults, factory

re-initializing radio using INIT command
resetting Hand-Held Terminal (HHT) to 17

DF command 23
DIAGLEV command 23
Diagnostic Channel Enable, interface connection for (Pin 23) 12
Diagnostics

advanced mode
bench testing set-up 38
loopback mode 15
remote maintenance mode 15
set level (DIAGLEV command) 23
using LEDs 13
using PC software for 37

Diagnostics. See also Troubleshooting
Diagnostics and configuration software

MDS InSite software (remotely reset RTU) 14
REMOTE Radio Diagnostics Software (for programming

using 37

Diagnostics using Hand-Held Terminal (HHT)

checking for alarm conditions (STAT command)
connection and start-up 16
event codes displayed on 33

Display

alarm status (STAT command)
all settings (DUMP command) 24
baud setting (BAUD command) 22
data port, active (SHOW command) 29

15

transceiver)

15

29

11

25

32

DC voltage (SHOW command) 29
frequency, receive (RX command) 28
frequency, transmit (TX command) 31
hardware revision level (HREV command) 25
key-up delay (PTT command) 27
loopback code (LBC command) 26
model number (MODEL command) 26
owner’s message (OWM command) 27
owner’s name (OWN command) 27
power/frequency settings (RMRD command) 28
revision level, hardware (HREV command) 25
revision level, software (SREV command) 29
RF forward output power setting (PWR command) 27
RF power output (SHOW command) 29
RSSI (RSSI command) 28
serial number, radio (SER command) 29
software revision level (SREV command) 29
squelch tail eliminator state (STE command) 30
status, radio (STAT command) 29
temperature, internal transceiver (TEMP command) 30
time-out period (TOT command) 31
timer status (TOT command) 31
timer value for CTS line response (CTS command) 23

DKEY command 24
Downloading new software 37
DP command 24
DSR (Data Set Ready), interface connection for (Pin 6) 11
DSTE command 24
DUMP command 24

E

EEPROM FAILURE error message 19
EMP command 24
Emphasis & deemphasis, enable/disable (EMP command) 24
Enable/disable

emphasis & deemphasis (EMP command)
internal RTU (RTU command) 28
STE circuit (ESTE/DSTE commands) 24

Entering commands 18
Error messages

access denied
alarm event codes 33
command failed 18
EEPROM failure 19
for HHT-entered commands 18
incorrect entry 18
not available 19
not programmed 18
password invalid 19
text too long 18
unknown command 18

ESTE command 24
Event code definitions 33

19

24

F

Factory

I-2 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

defaults. See Defaults, factory

Feedline

loss occurring by length and cable type 9
selection of 9

Filters, helical 35
Firmware. See Software 29
Frequency

transmit, decrease (DECF command)
transmit, decrement by 1% (DF command) 23
transmit, display (TX command) 31
transmit, increase (INCF command) 25
transmit, increment by 1% (INCF command) 25

Full duplex (continuously keyed operation) 3

23

transceiver mounting dimensions 8
Yagi antenna, typical 9

INCF command 25
INCORRECT ENTRY error message 18
INIT command 25
Initialize

Hand-Held Terminal (HHT)
transmitter (INIT command)

Installation

basic steps
power connection 8
transceiver mounting 8

IP command 26

6

17

G

Ground

for use in asserting sleep mode
protective, interface connection for (Pin 1) 11
signal, interface connection for (Pin 7) 11

7

H

Half-duplex

communications in point-to-point systems
switched carrier operation 3

Hand-Held T erminal (HHT)

alarm (event) codes displayed on
command summary 19
connection and start-up 16
error messages (from entered commands) 18
how to enter commands 18
parameter settings for operation 17
re-initializing 17
transceiver programming 15

Hardware revision level, display (HREV command) 25
Helical filters, adjusting 35
HHT. See Hand-Held Terminal
HREV command

25

2

32

I

IF command 25
Illustrations

bench test set-up
Celsius to Fahrenheit conversion 31
hand-held terminal connected to the transceiver 16
HHT display in response to STAT command 33
HHT set-up display 17
LED status indicators 13
MAS network, typical 2
MDS 4710B helical filter locations 36
MDS 9710B helical filter locations 36
model number codes 4
point-to-point link, typical 2
remote station arrangement, typical 5
RSSI versus DC voltage 14
transceiver connectors & indicators 1

38

K

KEY command 26
Keying

activate transmitter (KEY command)
continuously keyed versus switched carrier operation 2
continuously keyed, defined 3
deactivate transmitter after (DKEY command) 24
switched carrier, defined 3

26

L

LBC command 26
LED status indicators

as troubleshooting tool 32
meaning of 13

Local maintenance commands 21
Loopback

code, display/change (LBC command) 26
mode, diagnostic 15

M

Maintenance

local commands 21
remote, diagnostic mode 15
remote, RTU reset 15

Maintenance. See also Troubleshooting
Master station

best to begin troubleshooting at 31
keying behavior 2
and loopback code 15
maximizing RSSI from 6
as part of Multiple Address System (MAS) 1
PC used for diagnostics with 38
setting carrier mode for 30
and STE setting 24

MDS 4710B/9710B

antenna
applications 1–3
bench testing of 38
commands 18–31
data interface connections 10–12
description 1

1

9

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide I-3

illustration 1
installation 5–12
LED status indicators 13
meaning of model number code 3–4
mounting 8
operation 12–15
power supply 8
programming 15–17
specifications 34–35
troubleshooting 31–34

Minimizing power consumption using Sleep Mode 7
MODEL command 26
Model number code

description
display (MODEL command) 26

Modem

set signal type and modulation mode (MODEM command)
types and speeds 10

MODEM command 26
Mounting. See Installation 8
Multiple Address System 1

described by keying behavior of master station 1

3

N

Network-wide diagnostics

enable/disable internal RTU (RTU command)

NOT AVAILABLE error message 19
NOT PROGRAMMED error message 18

28

O

26

increase transmit by 1% (IP command) 26
input, transceiver 8
minimizing use of 7
PWR command 27
PWR LED 13
specifications 35

Problem solving. See Troubleshooting 31
Procedures

checking for alarms
connecting a PC to the radio 37
connecting HHT to radio 16
enabling sleep mode 7
general, for entering commands using HHT 18
helical filter adjustment 35
initial start-up 12
installation steps 6
programming operating frequencies 6
re-initializing HHT 17
remotely resetting RTU using InSite software 14
upgrading radio’s software 37

Product

description, MDS 9810/9820 1
numbers. See Model number codes

Programming

connecting a PC to the radio for 37
updating radio’s software 37
using PC software 37

PTT command 27

interface connection for (Pin 14) 11
interface connection for (Pin 16) 12

PWR command 27
PWR LED 13

32

15–17

Operating commands. See Commands
Operating environment specifications
Operation

initial start-up
reading LED status indicators 13

Order numbers. See Model number codes
Output, 9.9 Vdc Regulated, interface connection for (Pin 19)
OWM command 27
OWN command 27

12

35

P

PASSWORD INVALID error message 19
PC

connecting to radio for diagnostics/configuration
using diagnostic software on 37

Performance testing 38
Pinouts, interface connector 10
Point-to-point system 2
Port, display active (SHOW command) 29
Power

accessory, interface connection for (Pin 18)
decrease transmit (DECP command) 23
decrease transmit by 1% (DP command) 24
display RF output (SHOW command) 29
increase transmit (INCP command) 25

37

12

12

R

Radio Inhibit, interface connection for (Pin 12) 11
Radio software. See Software
Receive Audio Output, interface connection for (Pin 11)
Received signal strength. See RSSI
Receiver

set audio level (RXLEVEL command)
specifications 35

Remote maintenance 15

diagnostic mode 15
resetting RTU 14

REMOTE Radio Diagnostics Software (for transceiver

programming)

Remote RTU Reset line, interface connection for (Pin 15) 12
Resetting

Hand-Held Terminal (HHT) 17
RTU remotely 14

RF power, chart for converting to watts or volts 39
RMIS command 27
RMOV command 27
RMRD command 28
RMST command 28
RSSI

checking with DC voltmeter
command 28

15

14

28

11

I-4 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

interface connection for (Pin 21) 12
signal level versus DC voltage 14

RTS (Request-to-Send Input), interface connection for (Pin 4) 11
RTU

command

RTU, resetting remotely 14
RUS (Receiver Unsquelched Sensor), interface connection for (Pin

RX command 28
RXD

LED
LED interface connection for (Pin 3) 11

RXLEVEL command 28

10)

28

11

13

S

Safety. See Cautions
SCD command
SER command 29
Serial number, display radio (SER command) 29
SHOW command 29
Signal strength. See RSSI
Simplex

communications in point-to-point systems
single-frequency operation 3
special case of switched carrier operation 3

Sleep Mode 7

example implementation 7

Software

determining level (SREV command) 29
installing upgrades 37

Specifications 34–35

data interface 35
operating environment 35
primary power 35
receiver 35
transmitter 34
UK MPT 1411 1

Squelch tail eliminator

disable (DSTE command)
display state (STE command) 30
enable (ESTE command) 24

SREV command 29
STAT command 29
Status, radio (STAT command) 29
STE command 30
Summaries/charts

Celsius to Fahrenheit conversion
command equivalents for older transceivers 22
data interface pin functions 11
dBm-watts-volts conversion chart 39
event codes 33
feedline loss by cable length and type 9
HHT operational settings 17
LED status indicators 13
local maintenance commands 21
modem type versus speed 10
operating parameter commands 19
relationship between RSSI and DC voltage 14

29

2

24

31

specifications 34–35
transceiver accessories 4

SWE command 30

T

Technical reference 34–39

data interface specifications 35
helical filter adjustment 35
operating environment specifications 35
primary power specifications 35
receiver specifications 35
transceiver specifications 34
transmitter specifications 34

TEMP command 30
Temperature, display transceiver internal (TEMP command) 30
Testing. See Bench testing
TEXT TOO LONG error message
Time-out period, display (TOT command) 31
Timer setting, clear-to-send (CTS command) 23
Timer status, display (TOT command) 31
TOT command 31
Transceiver

commands
mounting 8
power input 8
programming 15
specifications 34

Transmit Audio Input, interface connection for (Pin 9) 11
Transmitter

activate (KEY command)
power. See PWR command 27
set audio level (TXLEVEL command) 31
specifications 34

Troubleshooting 31–34

bench testing set-up 38
checking for alarms using STAT command 32
event codes 32, 33
LED status indicators 32
major vs. minor alarms 33

TX command 31
TXD

LED
LED, interface connection for (Pin 2) 11

TXLEVEL command 31

18

13

18

26

U

UNKNOWN COMMAND error message 18

V

Voltages, display DC input/output (SHOW command) 29

MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide I-5

I-6 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E

IN CASE OF DIFFICULTY...

MDS products are designed for long life and trouble-free operation. However, this equipment, as
with all electronic equipment may have an occasional component failure. The following informa­tion will assist you in the event that servicing becomes necessary.

F ACT ORY TECHNICAL ASSIST ANCE

Technical assistance for MDS products is available from our Customer Support Team during
business hours (8:00 A.M.–5:30 P.M. Eastern Time). When calling, please give the complete
model number of the radio, along with a description of the trouble symptom(s) that you are expe­riencing. In many cases, problems can be resolved over the telephone, without the need for
returning the unit to the factory.

Please use the following telephone numbers for product assistance:
716-242-9600 (Phone)
716-242-9620 (FAX)

FACTORY REPAIRS

Component-level repair of radio equipment is not recommended in the field. Many components
are installed using surface mount technology, which requires specialized training and equipment
for proper servicing. For this reason, the equipment should be returned to the factory for any PC
board repairs. The factory is best equipped to diagnose, repair and align your radio to its proper
operating specifications.

If return of the equipment is necessary, you will be issued a Returned Material Authorization
(RMA) number. The RMA number will help expedite the repair so that the equipment can be
repaired and returned to you as quickly as possible. Please be sure to include the RMA number
on the outside of the shipping box, and on any correspondence relating to the repair. No equipment

will be accepted for repair without an RMA number.

A statement should accompany the radio describing, in detail, the trouble symptom(s), and a
description of any associated equipment normally connected to the radio. It is also important to
include the name and telephone number of a person in your organization who can be contacted if
additional information is required.

The radio must be properly packed for return to the factory. The original shipping container and
packaging materials should be used whenever possible. All factory returns should be addressed to:

Microwave Data Systems Inc.
Customer Service Department
(RMA No. XXXX)
175 Science Parkway
Rochester, NY 14620 USA

When repairs have been completed, the equipment will be returned to you by the same shipping
method used to send it to the factory. Please specify if you wish to make different shipping
arrangements.

175 Science Parkway, Rochester, New York 14620

General Business: [phone]

FAX: [phone]

Web: www.microwavedata.com