GE MDS DS-SDM4 MDS SDM4 Licensed Spectrum Module User Manual

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MDS 05-6399A01, Rev. D MDS Master Station 1



MDSMasterStation

ModularCommunicationsPlatform



MDS05‐6399A01,Rev.D



August2015

FirmwareVersion2.2.6andhigher.



Technical Manual

2 MDS Master Station MDS 05-6399A01, Rev. D

MDS 05-6399A01, Rev. D MDS Master Station 3

Quick-Start instructions for this product are contained in publication 05-6398A01.

Visit our website for downloadable copies of all documentation at www.gemds.com.

4 MDS Master Station MDS 05-6399A01, Rev. D

TableofContents

1INTRODUCTION12

1.1ORGANIZATIONOFMANUAL12

1.1.1RELATEDPUBLICATIONS13

2KEYPRODUCTFEATURES14

2.1ACCESSORIESANDSPAREITEMS14

2.2TECHNICALSPECIFICATIONS16

2.2.1FCCEMISSIONDESIGNATORS:HOWTOFINDTHEM17

2.3FRONTPANEL18

2.4REARANTENNACONNECTIONS19

3INSTALLATIONPLANNING20

3.1APPLICATIONS21

3.2NETWORKMANAGEMENT21

3.3REDUNDANTVERSUSNON‐REDUNDANTOPERATION22

3.4ANTENNASANDFEEDLINES22

3.4.1ANTENNAS22

3.4.2FEEDLINES22

3.5GROUNDINGCONSIDERATIONS23

3.6DATAINTERFACECONNECTIONS24

3.6.1ETHERNETDATAINTERFACE(RJ‐45)24

3.6.2SERIALDATAINTERFACES24

3.6.3MINIUSB25

3.6.4ALARMOUTPUTAND4‐WIREAUDIO25

4INSTALLATIONPROCEDURES26

4.1UNPACKINGANDINSPECTION26

4.2INSTALLATIONSTEPS26

4.2.1INITIALSTARTUP&OPERATION30

5DEVICEMANAGEMENT32

5.1PRE‐CONFIGUREDSETTINGS32

5.2ONE‐TIME“RECOVERY”PASSWORDS 32

5.3CONFIGURATIONVIACOMMANDLINE(CLI)34

5.3.1CLIQUICKREFERENCETABLE34

5.4INTERFACENAMING35

5.5CONFIGURATIONVIATHEDEVICEMANAGER36

5.5.1GENERALCONFIGURATION36

5.6INTERFACECONFIGURATION37

5.6.1SERIALINTERFACES37

5.6.2LAN41

5.6.3VLANOPERATION44

MDS 05-6399A01, Rev. D MDS Master Station 5

5.6.4BRIDGING47

5.6.5SDMSINTERFACE49

6MASTERSTATIONMODULES65

6.1ACPOWERSUPPLYMODULE65

6.2DCPOWERSUPPLYMODULE66

6.3PLATFORMMANAGERMODULE67

6.3.1PLATFORMMANAGERLEDINDICATORS68

6.3.2ETHERNETINTERFACES68

6.3.3COM1INTERFACE69

6.3.4COM2INTERFACE69

6.3.5MINIUSBINTERFACE71

6.3.6WIFIANTENNAINTERFACE(OPTIONAL)71

6.3.7GPSANTENNAINTERFACE(OPTIONAL)72

6.4SDMASTERRADIOMODULES72

6.4.1SDMASTERRADIOMODULELEDINDICATORS72

6.4.2SDMASTERRADIOMODULERFINTERFACE72

6.4.3SDM9RADIOMODULE–900MHZ73

6.4.4SDM4RADIOMODULE‐400MHZ73

6.5ALARMANDALARM/RELAYMODULES74

6.5.1ALARMMODULELEDS74

6.5.2ALARM/AUDIOINTERFACE75

6.5.3ALARM/RELAYTOGGLESWITCH(6847ONLY)76

6.5.4ALARM/RELAYRFCONNECTIONS(6847ONLY)76

6.6DUPLEXERTRAY76

7TROUBLESHOOTING78

7.1INTERPRETINGMODULELEDS78

7.1.1NORMALOPERATION78

7.1.2EXCEPTIONANDALARMSTATES79

7.2REDUNDANTUNITS80

7.3TECHNICALASSISTANCE80

7.4REPLACINGMODULES80

7.4.1POWERSUPPLYMODULES80

7.4.2PERIPHERALMODULES–INCLUDINGPLATFORMMANAGER,RADIO,ALARM,ANDALARMRELAYMODULES.81

7.4.3HOTSWAPREDUNDANTMODULES81

7.4.4INTERNALDUPLEXERTRAY81

7.5TESTINGANDREMOVINGANINTERNALDUPLEXER83

8TECHNICALREFERENCEDATA87

8.1RFPROPAGATIONPLANNING87

8.1.1FRESNELZONECLEARANCE87

8.1.2FORMULASFORSYSTEMPLANNING88

8.2DBM‐VOLTS‐WATTSCONVERSIONCHART90

9GLOSSARYOFTERMS&ABBREVIATIONS91

6 MDS Master Station MDS 05-6399A01, Rev. D

Figures

FIGURE1‐1.MDSMASTERSTATION...................................................................................................................................12

FIGURE2‐1COMPATIBLEREMOTES.....................................................................................................................................14

FIGURE2‐2.MDSMASTERSTATION,FRONTPANELCONNECTIONS&INDICATORS......................................................................18

FIGURE2‐3.MDSMASTERSTATION,REARPANEL.................................................................................................................19

FIGURE3‐1APPLICATIONEXAMPLE.....................................................................................................................................20

FIGURE3‐2.REARPANELGROUNDINGSCREW......................................................................................................................24

FIGURE4‐1.INTERNALDUPLEXER,TRIPLENCONNECTORS.......................................................................................................27

FIGURE4‐2.INTERNALDUPLEXER(ORINTERNALT/RSWITCH),SINGLENCONNECTORS................................................................27

FIGURE4‐3EXTERNALDUPLEXERORDUALANTENNAS.............................................................................................................28

FIGURE4‐4DCPOWERCONNECTOR...................................................................................................................................29

FIGURE4‐5LEDINDICATORS.............................................................................................................................................30

FIGURE6‐1ACPOWERSUPPLYMODULE.............................................................................................................................65

FIGURE6‐2.DCPOWERSUPPLYMODULE............................................................................................................................66

FIGURE6‐3PLATFORMMANAGERMODULE(PARTNUMBERS03‐6834AXX).............................................................................67

FIGURE6‐4ETHERNETPORT(RJ‐45)PINOUT(ASVIEWEDFROMTHEOUTSIDE)........................................................................68

FIGURE6‐5COM1CONNECTOR(RJ‐45)ASVIEWEDFROMOUTSIDETHEUNIT...........................................................................69

FIGURE6‐6.COM2CONNECTOR(RJ‐45)ASVIEWEDFROMOUTSIDETHERADIO........................................................................70

FIGURE6‐7.SDRADIOMODULE(PARTNO.03‐6846AXX—SDM9).......................................................................................72

FIGURE6‐8ALARM/RELAYMODULE(PARTNO.03‐6847AXX;03‐6848AXX)..........................................................................74

FIGURE6‐9:ALARM/AUDIOCONNECTIONS..........................................................................................................................75

FIGURE7‐1.400MHZNOTCHDUPLEXER(ADJUSTMENTGENERALLYNOTREQUIREDFORTRANSMITCHANGESUPTO100KHZ)...........82

FIGURE7‐2.900MHZBANDPASSDUPLEXER(ADJUSTMENTGENERALLYNOTREQUIREDFORTRANSMITCHANGESUPTO500KHZ).......82

FIGURE7‐3.INTERNALDUPLEXERREMOVAL.........................................................................................................................86

FIGURE8‐1FRESNELZONEOBSTRUCTIONS...........................................................................................................................87

FIGURE8‐2.ANTENNAHEIGHTVS.THEORETICALRADIOHORIZON............................................................................................88

MDS 05-6399A01, Rev. D MDS Master Station 7

Tables

TABLE1‐1ANTENNAGAINVS.MINIMUMRFSAFETYDISTANCE.................................................................................................8

TABLE2‐1ACCESSORIESANDSPARES...................................................................................................................................15

TABLE2‐2MASTERSTATIONTECHNICALSPECIFICATIONS........................................................................................................16

TABLE2‐3MODULEDESCRIPTIONS......................................................................................................................................19

TABLE3‐1 SIGNALLOSSINCOAXIALCABLES(AT900MHZ)....................................................................................................23

TABLE3‐2SIGNALLOSSINCOAXIALCABLES(AT400MHZ).....................................................................................................23

TABLE3‐3RF‐45TODB‐9FPINOUT.................................................................................................................................25

TABLE4‐1ACPOWERSUPPLYMODULE...............................................................................................................................28

TABLE4‐2DCPOWERSUPPLYMODULES.............................................................................................................................29

TABLE5‐1.CLIQUICKREFERENCETABLE.............................................................................................................................34

TABLE5‐2.APPROXIMATEREPROGRAMMINGTIMES‐PASSIVEMODE.......................................................................................61

TABLE5‐3.APPROXIMATEREPROGRAMMINGTIMES‐INTRUSIVEMODE....................................................................................61

TABLE6‐1.AVAILABLEMODULES........................................................................................................................................65

TABLE6‐26755ACPOWERSUPPLYMODULESPECIFICATIONS................................................................................................66

TABLE6‐3DCPOWERSUPPLYMODULE(6843,6844,6845)SPECIFICATIONS:.........................................................................67

TABLE6‐4.PLATFORMMANAGERLEDS...............................................................................................................................68

TABLE6‐5ETHERNETINTERFACEPINDESCRIPTIONS...............................................................................................................68

TABLE6‐6.COM1PINDESCRIPTIONS.................................................................................................................................69

TABLE6‐7.COM2PINDESCRIPTIONS—RADIOINRS‐232MODE............................................................................................70

TABLE6‐8COM2PINDESCRIPTIONS—RADIOINRS‐485MODE.............................................................................................71

TABLE6‐9EIA‐4224‐WIRECONNECTIONS..........................................................................................................................71

TABLE6‐10EIA‐4852‐WIRECONNECTIONS........................................................................................................................71

TABLE6‐11.SDRADIOMODULELEDS................................................................................................................................72

TABLE6‐126846SDM9RADIOMODULESPECIFICATIONS.....................................................................................................73

TABLE6‐13SDM4RADIOMODULESPECIFICATIONS..............................................................................................................73

TABLE6‐14ALARMMODULES...........................................................................................................................................74

TABLE6‐15.ALARMMODULELEDS....................................................................................................................................75

TABLE6‐16.CABLINGTOTHEDUPLEXERTRAYFACEPLATE.......................................................................................................76

TABLE7‐1.STATUSLEDS–NORMALOPERATION..................................................................................................................79

TABLE7‐2.STATUSLEDS–EXCEPTIONANDALARMSTATES....................................................................................................79

TABLE8‐1DBM–VOLTS–WATTSCONVERSIONCHART............................................................................................................90

8 MDS Master Station MDS 05-6399A01, Rev. D

This Technical Manual and all software described herein are protected by copyright: 2014 GE

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

Operational Safety Notices

The radio equipment described in this guide uses radio frequency transmitters.

Although the power level is low, the concentrated energy from a directional antenna may pose a

health hazard. Do not allow people to come in close proximity to the front of the antenna when

the transmitter is operating. More information on RF exposure can be found online at the following

website:

www.fcc.gov/oet/info/documents/bulletins

This manual is intended to guide a professional installer to install, operate, and perform basic

system maintenance on the described radio. The RF safety distance is calculated based on the 5

watt RF output (+37dBm) at the antenna connector on the back of the SDM chassis. This in-

cludes internal Duplexer and cable loss of ~3dB.

Table 1-1 Antenna Gain vs. Minimum RF Safety Distance

ntenna Gain

0–5 dBi 5–10 dBi 10–16.5 dBi

Safety Distance

SDM4 variant - FCC 1.09 meters 1.95 meters 4.11 meters

Safety Distance

SDM4 variant – IC 1.43 meters 2.54 meters 5.37 meters

Safety Distance

SDM9 variant 0.46 meter .82 meters 1.74 meters

Safety Distance

(other models):

Consult factory prior to operation.

Not all frequency models available. Consult factory for available models.

Antennas with gain greater than 16dBi have not been authorized for use with the EUT; and (b) installation

of the EUT into portable applications with respect to RF compliance will require SAR testing and Regu-

latory approval.

Installation & Servicing Precautions

The unit is provided for professional installation only, and utilizes a specialized antenna con-

nector to restrict the types of antenna connections that may be made. The integrator of this de-

RF Exposure

MDS 05-6399A01, Rev. D MDS Master Station 9

vice is responsible for compliance with all applicable limits on radiated RF power, and the RF

power output may need to be adjusted to maintain compliance, depending on the gain of the an-

tenna system.

All power supply main connections and disconnections must be made by a qualified electrical

installer.

When servicing energized equipment, be sure to wear appropriate Personal Protective Equipment

(PPE). During internal service, situations could arise where objects accidentally contact or short

circuit components and the appropriate PPE would alleviate or decrease the severity of potential

injury. When servicing radios, all workplace regulations and other applicable standards for live

electrical work should be followed to ensure personal safety.

ISO 9001 Registration

GE MDS adheres to this internationally-accepted quality system standard.

Quality Policy Statement

We, the employees of GE MDS, are committed to achieving total customer satisfaction in eve-

rything we do.

Total Customer Satisfaction in:

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

• Services and support we provide to our internal and external customers.

Total Customer Satisfaction Achieved Through:

• Processes that are well documented and minimize variations.

• Partnering with suppliers who are committed to providing quality and service.

• Measuring our performance against customer expectations and industry leaders.

• Commitment to continuous improvement and employee involvement.

Revision Notice

While every reasonable effort has been made to ensure the accuracy of this manual, product im-

provements 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 up-

dates can often be found on our Web site at www.GEmds.com.

ESD Notice

To prevent malfunction or damage to this radio, which may be caused by Electrostatic Discharge

(ESD), the radio should be properly grounded by connection to the ground stud on the rear panel.

10 MDS Master Station MDS 05-6399A01, Rev. D

In addition, the installer or operator should follow proper ESD precautions, such as touching a

grounded bare metal object to dissipate body charge, prior to connecting and disconnecting ca-

bles on the front or rear panels.

Environmental Information

The equipment that you purchased has required the extraction and use of natural re-

sources for its production. Improper disposal may contaminate the environment and present a

health risk due to hazardous substances contained within. To avoid dissemination of these sub-

stances into our environment, and to diminish the demand on natural resources, we encourage

you to use the appropriate recycling systems for disposal. These systems will reuse or recycle

most of the materials found in this equipment in a sound way. Please contact GE MDS or your

supplier for more information on the proper disposal of this equipment.

CSA Notice

Units(BothACandDCsupplyversions)arepermanentlyconnectedtoProtectiveEarth,viaground

studontheunitenclosureback,wherethefinalinstallationissubjecttoacceptanceofCSAInterna‐

tionalorthelocalinspectionauthorityhavingjurisdiction.



Conditions of Acceptability:

1. Theequipmentshallbeinstalledindoorsinarestrictedaccesslocation. 

2. Installationoftheequipmentanditsmodulesshallbeconductedbytrainedpersonnelinac‐

cordancewiththeelectricalcode.

3. Thisequipmentismovable,ClassI(earthed),pluggableTypeA,usingdetachablepowercords,

intendedforuseonTNorTTpowersystemfortheACpoweroption.

4. TheDCpoweroptionshallbeconnectedtoanapprovedpowersourcewithadequateprotec‐

tion,isolatedfromthemainsbyreinforcedinsulation.

5. Thisproductwascertifiedforuseona20AbranchcircuitfortheACpoweroption. 

6. TheACsocketoutletshallbeinstalledneartheequipmentandshallbeeasilyaccessible.

7. Thepowersupplycordmustbedisconnectedfromtheapplianceinletbeforeremovingany

powersupplyfromthechassis. 

8. CAUTION:THISUNITHASMORETHANONEPOWERSUPPLYCORD.DISCONNECTTHETWO

POWERSUPPLYCORDSBEFORESERVICINGTOAVOIDELECTRICSHOCK

9. Theequipmentchassisshallbepermanentlygroundedthoughasizesixscrewandastar

toothedwasher.

10. Theinterioroftheequipmentisnotforoperatoraccess.

FCCPart15Notice

ThisEquipmenthasbeentestedandfoundtocomplywiththelimitsforaClassAdigitaldevice,

pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotec‐

tion against harmful interference when the equipment is operated in a commercial environ‐

ment. This equipment generates, uses, and can radiate radio frequency energy and, if not in‐

stalledandusedinaccordancewiththeinstructionmanual,maycauseharmfulinterferenceto

radio communications. Operation of this equipment in a residential area is likely to cause

MDS 05-6399A01, Rev. D MDS Master Station 11

harmful interference in which case users will be required to correct the interference at their

ownexpense. 



ThisdevicecomplieswithPart15oftheFCCRules.Operationissubject tothefollowingtwo

conditions:(1)thisdevicemaynotcauseharmfulinterference,and(2)thisdevicemustaccept

anyinterferencereceived;includinginterferencethatmaycauseundesiredoperation. 



Warning:Changesormodificationsnotexpresslyapprovedbythemanufacturercouldvoidthe

user’sauthoritytooperatetheequipment

Canada, IC ERP Limits

IC SRSP-501, 6.3.2. Limits the ERP to 125W for fixed point-to-point operation. For IC use, the antenna

gain and Transmit power must be set to meet the ERP limit of 125W. This can be accomplished by

using the appropriate at antenna gain in combination with the RF power settings

Open Source License Declaration

Orbit MCR products include Open Source Software. Usage is governed by the corresponding licenses

which are listed on the GE MDS Industrial Wireless website, under Orbit MCR Software/Firmware

Downloads, Support Items and download license-declaration.txt.

Upon request, in accordance with certain software license terms, GE will make available a copy of Open

Source code contained in this product. This code is provided to you on an “as is” basis, and GE makes no

representations or warranties for the use of this code by you independent of any GE provided software or

services. For more information, contact gemds.techsupport@ge.com

12 MDS Master Station MDS 05-6399A01, Rev. D

1 INTRODUCTION

The MDS Master Station is an advanced, flexible platform designed for the demanding requirements of

today’s industrial wireless networks. It represents the latest development in a line of MDS products that

set the standards for wireless performance today. The Master Station builds on this legacy with several

innovative features, including a single compact chassis (2 RU), 100% duty cycle operation (no cooling

fans required), front panel access to all modules, and drop-in compatibility with earlier MDS x790/x710

radio systems.

As the central station in a wireless network, the Master Station provides uncompromised performance and

reliability in mission-critical applications. It offers redundant protection of key modules, automatic

switchover in the event of a fault, and an external battery backup option for continued operation through

temporary power losses. The Master Station mounts conveniently in a 19-inch rack cabinet, or may be

used in shelf/tabletop configurations.

Figure 1-1. MDS Master Station

The Master Station can be configured for a variety of service applications, including Point-to-Multipoint

SCADA, Point-to-Point links, broadband

, and Cellular connectivity

, depending on the modules installed

and active in the chassis.

In FCC part 90 SCADA service, the radio can function as a Master, Repeater, or Remote and is capable of

full duplex operation. Internal duplexer options are available, configured for use with or without an ex-

ternal notch filter. Provisions for connection to an external duplexer are also provided. The Master Station

is fully compatible with MDS PulseNET management software, which provides local or remote diagnosis

and health reporting.

1.1 Organization of Manual

This manual is intended for use by systems engineers, network administrators, and others responsible for

the planning, installation, commissioning, use, and troubleshooting of the wireless system. The manual

begins with an overall description of product features, and is followed by the steps required to install the

unit and place it into normal operation.

Future availability

MDS 05-6399A01, Rev. D MDS Master Station 13

Following the installation procedures, sections are devoted to particular modules that may be installed in

the chassis, including configuration settings for each of these units. Additionally, troubleshooting tips for

resolving system difficulties are offered, as well as a technical reference section with data on wiring,

specifications, and spare parts that may be ordered for the unit.

When installation and setup of the radio is complete, it is recommended that this guide be kept available

for future reference at the installation site. Updated manuals, firmware, and other support documents may

be obtained at any time from our website: www.gemds.com.

1.1.1 Related Publications

In addition to this manual, a companion Setup Guide is available for the MDS Master Station, Part No.

05-6398A01. The Setup Guide is focused on the essential steps for installation and startup of the unit, and

is designed to be used with this Technical Manual.

MDS Master Station is built on the Orbit platform. For reference information on advanced networking

features available on the local LAN Interface, refer to the MDS Orbit MCR Technical Manual (Rev.

C). Note that not all features are supported by the Master Station or the SD Radio Module. Wireless net-

working capabilities are limited by the narrowband channel and the capabilities of the remote radio.

05-6632A01, Rev. C November 2014 MDS Orbit MCR Technical Manual

14 MDS Master Station MDS 05-6399A01, Rev. D

2 KEY PRODUCT FEATURES

As a licensed, long range IP/Ethernet and serial communications device, the Master Station exceeds in-

dustry standards for reliability and performance in wireless networks. Listed below are several key fea-

tures and benefits of the product, and these are available with the appropriate modules installed and con-

figured in the chassis.

• Drop-in replacement for earlier MDS x790 Master Stations, including support for all modem types

• Backward compatibility with all legacy MDS x710 Series remote transceivers (A and B modems)

• May be operated as a Master Station, repeater, or remote radio

• Supports use of MDS PulseNET Network Management Software

• Software-configurable via a built-in web-based device manager—no manual adjustments required

• Firmware-upgradeable for future improvements and functionality enhancements

• Available encryption of payload data (AES 128-bit), for networks using all-SD radios

• Dual serial functionality (RS-232 and RS-485)

• Licensed 10-watt radio design ensures minimum 5-watts at the duplexer output, and maximizes

communications range with low interference risk from other users

• RF power adjustable; 1-10 watts at output of radio card (before duplexer)

• Unit is configurable via software, locally or remote

• Media Access Control (MAC) to prevent data collisions when two or more radios attempt to use

the radio channel at the same time2

• Store and Forward capability2

• Supports a wide variety of modem speeds and bandwidths for regulatory compliance in virtually

all regions of the world2

NOTE: Some features may not be available on all units, depending on the options purchased and regu-

latory constraints for the region in which the radio will operate.

Figure 2-1 Compatible Remotes

The Master Station works with legacy MDS x710 (left),

and newer MDS SD Transceivers.

2.1 Accessories and Spare Items

The following table lists common accessories and spare items for use with the Master Station. GE MDS

also offers an Accessories Selection Guide listing an array of additional items available for use with the

product. Contact your factory representative or visit www.gemds.com to obtain a copy of the guide.

2 Future availability

MDS 05-6399A01, Rev. D MDS Master Station 15

Table 2-1 Accessories and Spares

Item Description Part Numbe

Three-conductor DC power plug Mates with power connector on the front of the unit’s DC power supply

module. Screw terminals are provided for wires, and threaded locking

screws to prevent accidental disconnect.

73-1194A22

Setup Guide

(for installation & basic startup)

Brief document describing the installation and setup of the unit. One copy

normally supplied with each unit. Additional PDF copies available (no

charge) from www.gemds.com.

05-6398A01

COM Port Adapter Converts the unit’s RJ-45 serial jack to a DB-9F type. 73-2434A25

Mini USB 2.0 Cable, 3 ft./0.91 meter

length

USB Type A (M) to mini-USB Type B (M) cable to provide console access

through the radio’s mini USB connector.

97-6694A05

Lightning Protectors Polyphaser Surge Protector, IS-50NX-C2, DC blocked, 125 MHz to 1000

MHz, N-female connectors, surface (flange) mount

Polyphaser Surge Protector, IS-B50LN-C2, DC blocked, 125 MHz to 1000

MHz, N-female connectors, bulkhead mount

97-1680A01

97-1680A05

Cavity Filter Kit Removes or attenuates interfering 900 MHz signals from the receiver

input. Might be necessary in areas with high powered stations nearby,

such as paging transmitters. Requires tuning to a particular frequency.

Available for use with an internal or external duplexer.

03-3621Axx

Alarm & Audio Cable Cable connects to 6847/6848 Alarm/Relay Modules to provide access to

four wire audio, push to talk, analog RSSI, and Major/Minor alarm dry

contacts

03-6940A01

External Battery Kit MDS provides an external battery kit that consumes one of the power

supply slots.

Contact Factory

100-220 AC Power Supply Module 100-220 Vac, 50/60 Hz. 120W Max AC Power Supply Module. Spare

power supply can be used in either of two power supply slots of the MDS

Master Station.

03-6755A02

+/- 12-36 V DC Power Supply Module +/- 12-36 Vdc. 10 A Max. DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master

Station.

03-6843A01

+/- 36-75 V DC Power Supply Module +/- 36-75 Vdc. 3.5 A Max DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master

Station.

03-6844A01

+/- 75-140 V DC Power Supply

Module

+/- 75-140 Vdc. 2 A Max DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master

Station.

03-6845A01

Platform Manager Module Provides management and data interface functions. 03-6834A01A

SDM9 C-Band Module Full duplex radio module. 928-960MHz FCC Part 24, 101 03-6846A01

Redundant Alarm/Relay Module Active radio relay and alarm/audio interface. 03-6847A01

Non-Redundant Alarm Module Non-redundant—Alarm and audio interface. 03-6848A01

Duplexers Spare duplexer in tray wired for MDS Master Station.

9 MHz (932.0-932.5) / (941.0-941.5), COMBINED OUT

24 MHz (928.0-929.0) / (952.0-953.0), COMBINED OUT

31 MHz (928.0-929.0) / (959.0-960.0), COMBINED OUT

9 MHz (932.0-932.5) / (941.0-941.5), RX OUT, RX IN, COMBINED OUT

24 MHz (928.0-929.0) / (952.0-953.0), RX OUT, RX IN, COMBINED OUT

31 MHz (928.0-929.0) / (959.0-960.0), RX OUT, RX IN, COMBINED OUT

03-6837D9B1

03-6837D9C1

03-6837D9D1

03-6837D9B3

03-6837D9C3

03-6837D9D3

16 MDS Master Station MDS 05-6399A01, Rev. D

2.2 Technical Specifications

The following are operating specifications for the SD Master Station 900MHz and 400MHz variants.

Items are separated into Transmit (TX) and Receive (RX) categories. Ongoing product improvements

may result in specification changes, and GE MDS reserves the right to make such changes without obli-

gation to any party. Should you require an exact specification for the build of your unit, please contact the

factory for additional assistance.

Table 2-2-1 900MHz Master Station Technical Specifications

Transmit (TX) Parameter Specification

Frequency Range 928-960 MHz (SDM9C)3

Frequency Stability <0.5 ppm, -30C to +60C

TX Power Out +40.25 dBm +/-0.85dB at radio card for -30 to +60C4

TX Frequency Response +/- 1.0 dB from 100 Hz to 2.5 kHz

Agency Approvals

FCC Part 24D

FCC Part 101C

IC RSS 119

Load VSWR 10:1 Max, All angles, No damage

Power Consumption <80W for all DC and AC versions, 100% TX Duty Cycle

Receive (RX) Parameter Specification

Frequency Range 928-960 MHz

RX Intermodulation >60 dB

RX Adjacent Channel >60 dB

RX Spurious and Image >60 dB when operating with integrated bandpass duplexer

RX Baseband Amplitude 225 < Audio Level <275 mV RMS, -50 dBm @ 1 kHz

RSSI Accuracy +/-3 dB for RSSI -110 to -70 dBm

RX High RF Input Level 10 dBm, no damage

RX Baseband Frequency Response +/- 1.0 dB from 100 Hz to 2.5 kHz

Power Consumption <30W for all DC and AC versions, transmitter disabled

Noise Figure <6 dB

Blocking >60 dB

Operating Range -30C to +60C

3 Additional frequency bands under development

4 -30 to +50C when operating continuously keyed (CKEY)

MDS 05-6399A01, Rev. D MDS Master Station 17

Table 2-3-2 400MHz Master Station Technical Specifications

Transmit (TX) Parameter Specification

Frequency Range 400-450 MHz (SDM4B) 450-512MHz (SDM4C)5

Frequency Stability <0.5 ppm, -30C to +60C

TX Power Out +41.1 dBm maximum at radio card for-30 to +60C6

TX Frequency Response +/- 1.0 dB from 100 Hz to 2.5 kHz

Agency Approvals

FCC Part 22

FCC Part 90

IC RSS-119

Load VSWR 10:1 Max, All angles, No damage

Power Consumption <80W for all DC and AC versions, 100% TX Duty Cycle

Receive (RX) Parameter Specification

Frequency Range 400-450 MHz (SDM4B) 450-512MHz (SDM4C)

RX Intermodulation >60 dB

RX Adjacent Channel >60 dB

RX Spurious and Image >60 dB

RX Baseband Amplitude 225 < Audio Level <275 mV RMS, -50 dBm @ 1 kHz

RSSI Accuracy +/-3 dB for RSSI -110 to -70 dBm

RX High RF Input Level 10 dBm, no damage

RX Baseband Frequency Response +/- 1.0 dB from 100 Hz to 2.5 kHz

Power Consumption <30W for all DC and AC versions, transmitter disabled

Noise Figure <6 dB

Blocking >60 dB

Operating Range -30C to +60C

5 Additional frequency bands under development

6 -30 to +50C when operating continuously keyed (CKEY)

2.2.1 FCC Emission Designators: How to Find Them

An FCC emission designator is a seven-character string that represents the bandwidth, modulation, and

other characteristics of a transmitted radio signal. This information is required when applying for an FCC

license. The designator assigned to your equipment depends on the particular sub-model of the product

line you are licensing. In some cases, multiple designators are used to cover product variants such as base

5 Additional frequency bands under development

6 -30 to +50C when operating continuously keyed (CKEY)

18 MDS Master Station MDS 05-6399A01, Rev. D

stations, remotes, indoor/outdoor units, frequency band, etc. An updated and official list of emission des-

ignators is maintained on the FCC’s website at the following link:

https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm

Once the site has been reached, proceed as follows to determine your designator:

1. At the top of form in the box labeled Grantee Code: enter E5M. This is the code for GE MDS

products.

2. At the bottom of the form in the box labeled Show x Records at a Time, enter a sufficiently large number

(i.e., 300) to display all GE MDS records on file. Press Enter.

3. Once the list appears, it can be searched to locate the particular model you are seeking information on.

To the left of each entry, there is a document icon. Click the icon to display the equipment authoriza-

tion report.

4. Scroll down to the section labeled Equipment Specifications to locate the appropriate emission designator.

If additional assistance is required, contact GE MDS using the information given at the end of this

manual.

2.3 Front Panel

All access to Master Station modules is made from the front of the unit after removing the protective cov-

er. To remove the cover, simply grasp the sides and pull out with a slight rocking motion. Tether strips on

the ends of the cover are available to keep it linked to the chassis when it has been removed from its in-

stalled position. The tethers allow the cover to rest just below the front panel during service work.

Figure 2-2. MDS Master Station, Front Panel Connections & Indicators

(Representative arrangement; Module types vary based on product configuration)

Master Station modules are factory installed and cabled. All modules are installed on slide-in assemblies

and secured to the chassis with knurled fasteners. The illustration below shows the modules installed in a

redundant configuration. For a non-redundant configuration, blank plates are used in place of the redun-

dant power supply and radio modules, and a non-redundant version of the Alarm/Relay module will be

installed. The table that follows lists the module types available as of the date of publication.

MDS 05-6399A01, Rev. D MDS Master Station 19

Table 2-4 Module Descriptions

Module Name ID Function

Power Supply 1,

Power Supply 2 6843: (12-36 Vdc)

6844: (+/- 36-75 Vdc)

6845: (125 Vdc)

6755: (110/220 Vac)

Provides operating power based on a variety of AC and

DC input options. Up to two power supply modules may be

installed in the chassis (AC or DC; any combination. In a

redundant configuration, both power supplies work in

tandem and are independent of which radio is currently

active.

Platform Manager 6834 Provides management and data interface functions.

Radio A,

Radio B

6846 (SDM9) Single or redundant full duplex SD Master radios.

Alarm/Relay Module 6847

6848

Redundant—Active radio RF relay and alarm/audio

interface.

Non-redundant—Alarm and audio interface.

Duplexer 6837 Internal RF duplexer (if equipped). Allows simultaneous

transmission and reception of signals on separate TX/RX

frequencies, using a single antenna.

2.4 Rear Antenna Connections

Figure 2-3. MDS Master Station, Rear Panel

Showing Antenna Connection & Heatsink

(Other configurations possible for external items such as duplexer or cavity filter)

20 MDS Master Station MDS 05-6399A01, Rev. D

3 INSTALLATION PLANNING

This section covers pre-installation factors that should be considered when installing the Master Station.

Careful planning will help achieve optimal performance from the radio. After reviewing this section, refer

to the step-by-step installation procedures beginning on INSTALLATION PROCEDURES.

The specific details at an installation site may vary, but there are three main requirements for installing

the unit in all cases:

• Adequate and stable primary power

• An efficient and properly installed antenna system

• Correct interface connections between the Master Station and any connected equipment.

Figure 3-1shows a common arrangement of the Master Station as used in a multiple address radio net-

work. The system shows both SD and legacy x710 remote transceivers in use. Depending on order op-

tions, the Master Station can communicate with remotes employing Ethernet signaling, serial signaling, or

a mix of both.

Figure 3-1 Application Example

MDS 05-6399A01, Rev. D MDS Master Station 21

3.1 Applications

The Master Station is designed for point-to-multipoint data transmission in utility SCADA communica-

tions, transactional systems, and telecommunications systems. The wireless network provides communi-

cations between a central host computer and remote terminal units (RTUs) or other data collection devic-

es. In such an arrangement, the operation of the radio system is transparent to the computer equipment.

Repeater and Polling Remote Operation

In a system using FCC Part 90 repeater and polling remote, the polling remote radio operates in

half-duplex mode and the repeater operates in full-duplex mode. The SD Master Station can be used as a

polling remote, or as a repeater. Refer to Section 5.6.5.1.1 Basic Settings for details on configuring the

radio for repeater operation.

Simplex and Switched Carrier Operation

System-wide simplex operation is achieved by switching the Master Station carrier on to transmit, and

then off to receive. The same frequency is used for both transmit and receive.

Switched carrier, half-duplex mode works in the same way, except different frequencies are used for

transmit and receive.

Refer to Section 5.6.5.1.1 Basic Settings for details on configuring the radio for simplex or switched car-

rier operation.

3.2 Network Management

Network-Wide Diagnostics

The Master Station offers network-wide diagnostics capability, sometimes referred to as DLINK Diag-

nostics. Network-wide diagnostics communications is a packetized diagnostic capability that provides the

following advantages:

• You can gather diagnostic data over a large radio network without disrupting the system commu-

nications flow.

• When required, you can increase diagnostics communications speed by actively collecting diag-

nostic data.

• You can access diagnostic data for each radio in the network from any radio diagnostics port in the

network.

• You can broadcast certain messages to all radios in the system simultaneously.

You can use the Master Station to poll remote radios in its radio system for diagnostic data. For more in-

formation on the implementation of network-wide diagnostics, refer to the GE MDS Network-wide Diag-

nostics Handbook (P/N 05-3467A01).

Network Management Using PulseNET

PulseNET uses the DLINK protocol to monitor the Master Station and downstream devices. The Master

Station can be connected locally using either COM1 or COM2 serial or through Ethernet using TCP. Re-

fer to Section 5.6.5.1.2 Dlink for more information about configuring DLINK on the Master Station.

PulseNET remotely discovers and monitors Master Stations and other SD or x710 radios on the network

using DLINK. The locally connected radio may be a Master, Repeater, Polling Remote, or Remote. This

locally connected radio must be configured as the DLINK “root” radio. Downstream radios should be

configured as “node”. PulseNET uses passive polling to discover the “root” radio and all of the “node”

radios downstream. Passive polling allows monitoring without interrupting payload data transmission.

22 MDS Master Station MDS 05-6399A01, Rev. D

In order for pulseNET to discover Master Stations in the network, DLINK must be enabled and properly

configured. Refer to section 5.6.5.1.2 Dlink for information on how to configure DLINK.

3.3 Redundant versus Non-redundant Operation

A redundant configuration means that the Master Station has two complete transceiver boards and power

supplies installed in the enclosure. In the event of a failure in the primary equipment, the controlling logic

switches to the stand-by unit. The stand-by transceiver board is constantly operating and its operational

readiness is monitored. However, the power amplifier in the stand-by board is not operating when it is in

stand-by mode.

In a non-redundant configuration, there is only one transceiver board installed in the enclosure, and

back-up transceiver board operation is not possible.

Transceiver boards may be moved from one Master Station to another; however an additional transceiver

board cannot be added to a non-redundant Master Station. Redundant or non-redundant operation is au-

tomatically detected by the platform manager, and the active transceiver is automatically selected. In-

stalling or replacing a transceiver board causes the board to communicate briefly with the Platform Man-

ager to establish which transceiver board will operate as the active board and which operates as the

stand-by. For more information, refer to 7.4 Replacing Modules.

3.4 Antennas and Feedlines

3.4.1 Antennas

The Master Station may be used with a number of different antennas. The exact style and gain factor de-

pend on the physical size and layout of your system. Antennas of this type are available from several

manufacturers, including GE MDS. Contact your factory representative for details. Connection is made to

the station via N coaxial connectors at the rear panel.

3.4.2 Feedlines

The selection of an antenna feedline is very important. Poor quality cable should be avoided as it will re-

sult in power losses that may reduce the range and reliability of the radio system.

The tables that follow show the approximate losses that will occur when using various lengths and types

of coaxial cable in the 200, 400 and 900 MHz bands, respectively. Regardless of the type used, the cable

should be kept as short as possible to minimize signal loss.

MDS 05-6399A01, Rev. D MDS Master Station 23

Table 3-1

Signal Loss in Coaxial Cables (at 900 MHz)

Cable Type 10 Feet

(3 Meters) 50 Feet

(15 Meters) 100 Feet

(30.5 Meters) 200 Feet

(61 Meters)

RG-8A/U 0.85 dB 4.27 dB 8.54 dB 17.08 dB

1/2 inch HELIAX 0.23 dB 1.15 dB 2.29 dB 4.58 dB

7/8 inch HELIAX 0.13 dB 0.64 dB 1.28 dB 2.56 dB

1-1/4 inch

HELIAX

0.10 dB 0.48 dB 0.95 dB 1.90 dB

1-5/8 inch

HELIAX

0.08 dB 0.40 dB 0.80 dB 1.60 dB

Table 3-2 Signal Loss in Coaxial Cables (at 400 MHz)

Cable Type 10 Feet

(3 Meters) 50 Feet

(15 Meters) 100 Feet

(30.5 Meters) 200 Feet

(61 Meters)

RG-8A/U 0.51 dB 2.53 dB 5.07 dB 10.14 dB

1/2 inch HELIAX 0.12 dB 0.76 dB 1.51 dB 3.02 dB

7/8 inch HELIAX 0.08 dB 0.42 dB 0.83 dB 1.66 dB

1-1/4 inch HELIAX 0.06 dB 0.31 dB 0.62 dB 1.24 dB

1-5/8 inch HELIAX 0.05 dB 0.26 dB 0.52 dB 1.04 dB

3.5 Grounding Considerations

To minimize the chance of damage to the radio and connected equipment, a safety ground (NEC Class 2

compliant) is recommended which bonds the Master Station, antenna system, and connected data equip-

ment to a single-point ground, keeping all ground leads as short as possible.

The Master Station should be grounded using the #6-32 screw and star washer provided for this purpose

on the rear panel.

The use of a lightning protector is also recommended where the antenna cable enters the equipment

building; bond the protector to the tower/mast ground, if applicable. All grounds and cabling must comply

with applicable codes and regulations.

24 MDS Master Station MDS 05-6399A01, Rev. D

Figure 3-2. Rear Panel Grounding Screw

3.6 Data Interface Connections

3.6.1 Ethernet Data Interface (RJ-45)

The Ethernet interface supports both radio management and payload data transport functions.

For radio management, connecting via a web browser provides enhanced functionality and ease-of-use

over serial/USB methods. Web-based management is the preferred and primary means of accessing the

transceiver through the built-in Device Manager.

SSH may also be used on this connector, and provides the same CLI based user interface available via the

serial interfaces.

Refer to 6.3.2 Ethernet Interfaces for electrical information and connector pinout.

3.6.2 Serial Data Interfaces

COM1 and COM2 provided on the front of the Platform Manager module serve as the serial interface

ports for payload data, radio management, or diagnostics. Management is also available through the mini

USB port. The default factory settings for the radio’s COM1 port is as a serial data port to connect to an

external DTE serial device. The default factory settings for the radio’s COM2 port assigns it for manage-

ment of the radio via a serial connection to a PC. These ports are user-configurable for specific applica-

tions. The procedures for changing their default operation are provided later in this guide.

NOTE: Not all PCs have a serial port. If one is not available, a USB-to-Serial adapter and appropriate

driver software may be used to provide serial connectivity. These adapters are available from several

manufacturers, including GE MDS.

MDS 05-6399A01, Rev. D MDS Master Station 25

Serial Data Connection

When used as a data port for an SD Radio Module in Transparent or x710 modes, some pins on COM1

and COM2 have special behavior determined by configuration. DCD (Data Carrier Detect) is asserted

when the radio received an on-frequency signal. RTS (Request-to-Send) can be configured to key the

transmitter when asserted. CTS (Clear-to-Send) can be configured to go “high” after the programmed

CTS delay time has elapsed (DCE), or can be configured to key another connected radio when RF data

arrives (CTS KEY

The included Com Port Adapter Cable 73-2434A25 can be used to convert the unit’s RJ-45 serial jack to

a DB-9F type connector.

Table 3-3 RF-45 to DB-9F Pin Out

Signal RJ-45 DB-9F Standard RS-232

DSR 1 6 DSR

DCD 2 1 DCD

DTR 3 4 DTR

Ground 4 5 Ground

RXD 5 2 RXD

TXD 6 3 TXD

CTS 7 8 CTS

RTS 8 7 RTS

No connection N.C. 9 RI

3.6.3 Mini USB

The Mini USB port can be used to management the radio through a scriptable command line interface

(CLI) using the proper USB drivers available at www.gemds.com. Connect to the management PC using

the included Mini USB Cable. Once the PC registers the device driver, the port will auto baud. The USB

port provides CLI management only and cannot be used for network diagnostics or for payload data.

3.6.4 Alarm Output and 4-Wire Audio

Alarm and audio signals are provided on the Alarm or Alarm/Relay module. Refer to 6.5.1 Alarm Module

LEDs for details on pinout and signal descriptions. Audio signaling and alarm outputs are software

configurable. Refer to Section 5 Device Management for more information.

26 MDS Master Station MDS 05-6399A01, Rev. D

4 INSTALLATION PROCEDURES

This section presents the steps necessary for installing the radio and connecting it to associated equip-

ment. After completing these steps, the radio is ready for in-service operation.

4.1 Unpacking and Inspection

Check the contents against the packing list secured to the outside of the shipping box. Accessories and

spare parts kits, if any, are wrapped separately. Inspect all items for signs of damage. Save all packing

materials in case you need to ship the radio in the future.

4.2 Installation Steps

The radio should be installed in a relatively clean, dust-free environment that allows easy access to the

connectors and indicators. Air must pass freely over the rear heat sink and around the unit for proper

cooling. Follow the steps below to install the unit and prepare it for initial startup.

1 Mount the Unit. The unit may be rack-mounted (2U high) in a 19-inch rack cabinet, or may be placed

on any sturdy tabletop or other flat surface. The installation site should be free of excessive dust, and

should have adequate ventilation. The chassis should be positioned so that all interface cabling will

reach the required connectors.

When rack mounting, the rack ears can be installed in one of three positions to allow flexibility in the

mounted depth of the chassis. The unit should be mounted so as to maximize airflow around the rear

heat sink.

2 Ground the Chassis. Use the ground screw provided at the rear panel to connect the radio to a safety

ground (NEC Class 2 compliant), which bonds the Master Station, antenna system, and connected data

equipment to a single-point ground. Keep all ground leads as short as possible.

3 Connect Antenna Feedlines. All coaxial antenna connections are made to the Type-N connectors on

the rear of the unit. The number of connections depends on options ordered, including duplexer options,

as follows: Separate TX and RX; Combined TX/RX; wired for an external notch filter with RX Out,

RX In and combined TX/RX.

MDS 05-6399A01, Rev. D MDS Master Station 27

Figure 4-1. Internal Duplexer, Triple N connectors

Figure 4-2. Internal Duplexer (or internal T/R switch), Single N connectors

28 MDS Master Station MDS 05-6399A01, Rev. D

Figure 4-3 External duplexer or dual antennas

(TX and RX ports pass directly through)

4 Install the Data Interface Cabling. Interface connections are made to the front of the Platform

Manager module. Typical connections for most sites include:

• Serial Data—Attach data equipment to the front panel COM1 and/or COM2 ports. The unit is

hardwired as a DCE device (DB9-F to RJ-45 connector, GE MDS part no. 73-2434A12).

• Ethernet LAN—Attach data equipment to the ETH1 and/or ETH2 port. The auto-sensing MDIX

feature allows either a straight-through or crossover cable to be used.

Where applicable in the steps that follow, secure all cable connections with the locking screws pro-

vided.

5 Connect Primary Power—The Master Station is powered using one or two power supply modules

that work in tandem. The modules may be AC, DC, or a combination of both. The following tables list

each type and key operating parameters.

Table 4-1 AC Power Supply Module

Module Input Power Current Rating

6755 100-220 Vac, 50/60 Hz 120W Max.

All DC power supply modules have chassis isolated inputs and a diode bridge for floating ground,

positive ground, or negative ground installations. These modules include a keyed power connector

with screw-terminals. Strip the wire leads to 6mm (1/4 inch) and insert them into the wire ports pro-

vided. Be sure to observe the polarity shown below. Tighten the binding screws securely and insert the

connector into the module. For compliance with CSA, torque thumbscrews to 10in-lbs.

MDS 05-6399A01, Rev. D MDS Master Station 29

Table 4-2 DC Power Supply Modules

Module Input Power Current Rating

6843 +/- 12-36 Vdc 10 A Max.

6844 +/- 36-75 Vdc 3.5 A Max.

6845 +/- 75-140 Vdc 2 A Max.

•

Figure 4-4 DC Power Connector

6 Connect a PC for Configuration (LAN or USB port). This prepares the Master Station for programming

of desired operating parameters. Configuration is further described in Section 5 Device Management

NOTE: If serial-based cabling is used for configuration, an adapter may be required at the PC, as

many PCs do not offer a serial port. In such cases, a USB-to-Serial adapter (with appropriate driver

software) may be used. These adapters are available from a number of manufacturers.

7 Radio, Alarm/Relay, and Duplexer Connections—The Alarm/Relay module provides two alarm

outputs, one for major and one for minor alarms. This module also provides TX/RX audio, PTT (TX

keying), and analog RSSI connections. See 6.5.2 Alarm/Audio Interface for pinout connections.

All other required connections on the front of the unit are cabled at the factory per ordered options.

8 Add connection of battery backup, as applicable.

30 MDS Master Station MDS 05-6399A01, Rev. D

4.2.1 Initial Startup & Operation

The radio is designed for continuous, unattended operation, but does require some minimal provisioning

before operation. This section explains the use of the radio’s indicators and provides steps for initial

startup of the equipment. Once a unit is provisioned, operator intervention is not required, except to pow-

er the unit up or down, or to change an operating parameter.

Operation of the radio can be started by simply connecting primary power to the unit.

Module LED Indicators

All LED indicators are on the front of the unit. Platform Manager, Radio, and Alarm Modules include

LED. A redundant unit will be populated as shown above. A non-redundant unit will have only one Radio

Module and a different Alarm Module without RF connections.

Figure 4-5 LED Indicators

Normal Indications

When power is first applied, the following events occur in a normally working unit:

• All front panel indicators light briefly

• The ACTIVE LED for the selected transceiver board lights.

• The Power LED on the transceiver modules will begin to flash indicating they have not yet

communicated with the platform manager.

MDS 05-6399A01, Rev. D MDS Master Station 31

• The Power LED and Alarm LED will light on the Platform Manager card. At this point the platform

manager is performing a pre-boot validation of the firmware to ensure that all required security

signatures are in place and valid.

• The Alarm LED will turn off and the power LED will begin to flash. At this point the platform

manager is booting and initializing the system.

• Once the platform manager initializes the transceiver module, the power LED will stop flashing and

turn solid.

Maximizing RSSI

Since the Master Station almost always uses an omni-directional antenna, maximizing signal strength is

done at the remote sites where directional antennas are typically used. An RSSI stronger than -90 dBm is

desirable. Refer to Section 5 Device Management for information on monitoring the RSSI for the Radio

Module.

32 MDS Master Station MDS 05-6399A01, Rev. D

5 DEVICE MANAGEMENT

This section describes the steps for connecting a PC, logging in, and setting unit parameters. The focus

here is on the local serial/USB console interface, but other methods of connection are available and offer

similar capabilities. The key differences are with initial access and appearance of data.

The MDS Master Station offers several interfaces to allow device configuration and monitoring of status

and performance. These include local serial console, USB, NETCONF, HTTP/HTTPS, and Secure Shell

(SSH) for local and remote access via the WAN and LAN networks. The serial console, USB, and SSH

services offer a command line interface (CLI). There are three user accounts/roles for management

access: admin, tech, and oper. User accounts can be centrally managed with a RADIUS server, with

RADIUS accounts being mapped to one of the three user accounts/roles. Refer to 05-6632A01 MDS

Orbit MCR Technical Manual (Rev. C) for details on configuring RADIUS authentication.

MDS Orbit MCR Technical Manual (Rev. C). Note that not all features are supported by the Master

Station or the SD Radio Module. Wireless networking capabilities are limited by the narrowband channel

and the capabilities of the remote radio.

NOTE: The MDS Master Station is designed for high security environments. As such, management of

the device does not support Telnet, but instead implements the more secure SSH protocol.

5.1 Pre-Configured Settings

The unit is highly configurable to meet field requirements, but comes pre-configured as follows:

• COM1 is configured for transparent serial payload at a baud rate of 115200,8N1

• COM2 is configured to operate at a baud rate of 115200,8N1 and is enabled for local console operation.

• USB is enabled for local console operation (proper system drivers must be installed on the PC connect-

ed to the MDS Master Station to use the USB port as a virtual serial device; these drivers are available

from the GE MDS website).

• The Ethernet ports are bridged together, with spanning-tree protocol enabled, with a default IP address

of 192.168.1.1/24.

5.2 One-Time “Recovery” Passwords

The MDS Orbit platform employs extensive security measures to prevent unauthorized access. As such,

there are no hidden manufacturer passwords or other “backdoors” found in less secure products.

If a password is lost, there is no way to access the unit, except by using a one-time password (OTP) for

recovery. The user must create this OTP manually. Without a one-time password, the unit will not be ac-

cessible, and the hardware will need to be replaced. The factory will not be able to assist you if a pass-

word is lost, so creating a one-time password is strongly encouraged.

One-Time Passwords: How They Work

One-time recovery passwords put control directly and exclusively in the user’s hands. They are similar to

spare keys for a lock. If you make a spare key, and put it away safely, you can take it out to quickly gain

entry when your primary key is lost. If you don’t make a spare, you are always at risk of locking yourself

out.

A one-time recovery password is different from the one used to log into the unit on a routine basis. It is

only for use when the primary password is lost or forgotten. When a one-time password is used to log in,

MDS 05-6399A01, Rev. D MDS Master Station 33

that password is automatically revoked from the list of passwords created. (You may create up to five

one-time passwords at one time, and more can be created if some get used). Once used, a password can-

not be used again for log-in to the unit (hence the name “one-time” password)

Creating a One-Time Password

To create a one-time recovery password via the console, enter the following command, where <selected

function> is either “factory-reset” or “login”

request system recovery one-time-passwords create function selected function

NOTE: A one-time password is automatically generated and displayed on the screen. Copy this pass-

word and save it in the desired location on your PC. There is no way to ever view it again from

the command line console, so be sure it is properly saved.

To create additional one-time passwords (up to a total of five), repeat the step above.

Logging in With a One-Time Password

Logging in with a one-time password can only be performed from the local serial or USB console. Note

the local serial cannot be used if configured as a payload or diagnostic interfaces. You also cannot use a

one-time password when connecting to the unit remotely. Therefore, in some configurations, the USB

console is the only option.

To use the one-time password for log-in, proceed as follows:

At the username prompt, enter the word recovery.

At the password prompt, paste in the one-time-password saved earlier on your PC. Using a

one-time-password forces the unit to perform the “function” which was previously defined when

the password was created:

• factory-reset—The unit resets its entire configuration to factory defaults

• login—The unit allows logging in with “admin” privileges

Special case: If someone has disabled console access on the USB port, the login prompt will still be pre-

sent on that console, but only one-time-passwords will be accepted. This is done to provide a way to re-

cover the unit in the case where the USB port has been disabled and the unit cannot be accessed via TCP

(for example; SSH).

Deleting a One-Time Password

As noted earlier, a one-time password is automatically revoked when it is used for log-in. A revoked

password may be replaced, but it must first be removed from the list so a new one can be generated. Any

of the five stored passwords may be removed on demand. As long as there is a free slot, an additional

password can be created, up to the maximum number of five. Logs are generated when the user creates,

deletes or logs in with a one-time-password. To remove an existing password from the list, proceed as

follows:

Enter the command request system recovery one-time-passwords delete identifier <X>, where <X> is a

number from the currently available one-time passwords. This identifier is not reused. If all five pass-

words have been created, then ID 1 can be deleted, and the next created password will be at ID 6.

The current list of passwords may be viewed by issuing the command show system recovery

one-time-passwords. The following is an example output from that command. On the unit shown, only two

passwords have been stored.

Password 1 or 2 can be deleted from this list.

34 MDS Master Station MDS 05-6399A01, Rev. D

IDENTIFIER FUNCTION STATUS DATE CREATED DATE REVOKED USER

----------------------------------------------------------------------

1 login usable 2012-06-19T00:27:24+00:00

2 login usable 2012-06-19T00:27:25+00:00

5.3 Configuration via Command Line (CLI)

A scriptable command-line interface is accessible through the radio’s Ethernet port using Secure Shell

(SSH) terminal, or through the unit’s USB interface. For enhanced security, the unit does not support

Telnet configuration. The steps below describe a cabled USB connection and assume the proper drivers

have been installed.

1 Install the USB virtual serial port driver, which is available on the GE MDS web site.

2 Connect a PC to the unit's USB port and establish a console terminal session using a serial communi-

cations program.

3 Press the ENTER key to receive the login prompt.

4 Enter the username (admin is the default username) and press ENTER.

5 At the Password prompt, enter the password (admin is the default password). Press ENTER. Upon

successful login, the connection message appears.

6 Enter the configuration mode by typing configure followed by The ENTER key.

7 Review and configure all key settings for the required application. Built-in help is available by pressing

the Tab key. A summary of all unit settings may be viewed by entering the

% show | details command.

Tab Completion Feature

Tab-completion is a powerful feature that provides assistance when typing commands in CLI. Depend-

ing on the text that was already entered, tab-completion displays different possible completions. When the

Tab key is pressed and no text has been entered, the CLI shows all possible commands that can be typed.

5.3.1 CLI Quick Reference Table

Table 5-1. CLI Quick Reference Table provides a summary listing of commonly needed tasks and the

appropriate commands to enter. The table can be used as a quick reference before consulting the more

detailed information, which follows in this section. Each CLI command is preceded by the symbol > for

operational command, or % for a configuration command.

Table 5-1. CLI Quick Reference Table

If you wish to... Enter this CLI command:

Create a one-time password > request system recovery one-time-password create function <user

function>

View all network interface

status and statistics > show interfaces-state interface

Create a bridge % set interfaces interface bridge type bridge

Add the ETH1 interface to a

bridge % set interfaces interface bridge bridge-settings members port eth-0/0/0

Remove the ETH1 interface

from a bridge % delete interfaces interface bridge bridge-settings members port

eth-0/0/0

MDS 05-6399A01, Rev. D MDS Master Station 35

View SD Master Station

Settings > show configuration interfaces interface sdms sd-config

Monitor SDMS Status > show interfaces-state interface sdms sd-status | repeat 5

View the routing table > show routing

View the event log > show table logging event-log

Set the admin user’s

password > request system authentication change-password user admin

password admin1234

Set the device name % set system name “Mydevice”

Set the baud rate on COM1 % set services serial ports COM1 baud-rate b19200

Download a firmware

package from TFTP server at

192.168.1.10

> request system firmware reprogram-inactive-image filename

sdms-bkrc-1_0_0.mpk manual-file-server { tftp { address 192.168.1.10 } }

Monitor firmware download

status > show system firmware reprogramming-status

Export configuration file to a

TFTP server at 192.168.1.10 > request system configuration-files export filename myConfig.txt

manual-file-server {tftp {address 192.168.1.10} }

Reboot device to firmware

inactive image > request system power restart inactive

5.4 Interface naming

Interface naming of physical devices on the MDS Master Station uses the following format:

Where type is one of the following values:

Interface Type Abbreviations

Type Description

eth Ethernet Interface

sd SD Radio Module

wifi WiFi Interface

Slot-0 is the slot identifier for the platform manager, while slots 1-3 map to the available interface slots in

the chassis.

Ports are zero-based and map to the port number of the given interface type in the specified slot. Note that

not all interface types have port values that are non-zero (e.g. An SD radio module only has one “port”, so

it will always be ‘0’)

The center 0 value in the interface name is always 0, and is reserved for future use.

Examples of valid interface names are

 eth‐0/0/0–ThefirstEthernetportontheplatformmangercardinslot‐0

 eth‐0/0/1–ThesecondEthernetportontheplatformmanagercardinslot‐0

 sd‐2/0/0–TheSDRadiomoduleinslot‐2.

36 MDS Master Station MDS 05-6399A01, Rev. D

Logical (non-physical) interfaces such as bridges and VLANs use free-form names and can be renamed

by the user.

5.5 Configuration via the Device Manager

The Device Manager is a built-in software tool that works with your PC’s browser to provide an intuitive,

web-style presentation of all unit information, settings, and diagnostics. Device manager is accessible

through ETH1 or ETH2 using a web browser.

Minimum browser requirements: IE10 or later, Chrome, Firefox, or Safari.

NOTE: For security, web access can be enabled/disabled via the CLI using the command % set services

web http(s) enabled true/false

5.5.1 General Configuration

For initial configuration of the Master Station, perform the following steps:

1 Connect the unit to a PC via an Ethernet connection.

2 Configure your PC network settings to an IP address on the same subnet as the unit. The default subnet

mask is 255.255.255.0.

NOTE

For IP addressing the Master Station uses a routing prefix expressed in CIDR notation instead

of the specifying a subnet mask. The CIDR notation is the first address of a network, followed

by a slash character (/), and ending with the bit-length (max 32) of the prefix. A subnet mask is

expressed in dot-decimal notation. For example, 192.168.1.0/24 is equivalent to specifying

192.168.1.0 with a subnet mask of 255.255.255.0.

3 Open a web browser and navigate to the IP address of the unit (default Ethernet IP address is

192.168.1.1). The initial sign-in prompt appears.

4 Enter the username and password (admin is the default entry for both fields), then click ‘Sign In’.

5 On first-time login, the Initial Setup Wizard will appear and provide guidance for general device setup.

This is disabled after the initial setup has been complete but may be re-run at any time by accessing the

Wizards link on the left side of the screen, and clicking Initial Setup.

Key items that should be reviewed and/or set for the radio include:

 Create one-time programmable passwords for unit recovery

 Change login passwords (to maintain security)

MDS 05-6399A01, Rev. D MDS Master Station 37

 Evaluate default factory configuration and lock the unit down to the required security level

When the Initial Setup wizard completes, select WizardsSD Configuration Setup, which steps you

through initial SD Radio Module configuration. Key items that should be reviewed and/or set include:

 Frequency plan

 Modem selection

 Keying mode

 Serial data interface configuration

 Encryption settings

5.6 Interface Configuration

5.6.1 Serial Interfaces

A serial cable (RJ45 cable with proper ETH to DB9 converter) may be used to connect to a COM port on

the unit to access the CLI. The default serial console settings are 115200 bps with 8N1 format. A

mini-USB-to-USB cable may also be used to connect to a Computer in case no serial port exists. If a

mini-USB connection is used, the computer must contain the appropriate device driver. A driver for serial

operation can be found on GE MDS website.

Configuring

The screen below shows console access to the COM1 serial and USB port:

38 MDS Master Station MDS 05-6399A01, Rev. D

Navigate to: Home / Services / Serial

Click on the name of the port (COM1, COM2, USB) to get:

• Line Mode - Selection of the operation line mode of the serial port. Choices are:

• RS232 (DEFAULT)

• RS485 - 2 Wire

• RS485 - 4 Wire

• Baud Rate - The serial port baud rate in bps. Choices are 1200, 2400, 4800, 9600, 19200, 38400,

57600, 115200 (DEFAULT)

• Byte Format - The data byte format in bits, parity and stop bits: Choices are:

• 7N1 - 7 char bits, no parity, 1 stop bit

• 7E1 - 7 char bits, even parity, 1 stop bit

• 7O1 - 7 char bits, odd parity, 1 stop bit

• 7N2 - 7 char bits, no parity, 2 stop bits

• 7E2 - 7 char bits, even parity, 2 stop bits

• 7O2 - 7 char bits, odd parity, 2 stop bits

• 8N1 - 8 char bits, no parity, 1 stop bit (DEFAULT)

• 8E1 - 8 char bits, even parity, 1 stop bit

• 8O1 - 8 char bits, odd parity, 1 stop bit

• 8N2 - 8 char bits, no parity, 2 stop bits

• 8E2 - 8 char bits, even parity, 2 stop bits

• 8O2 - 8 char bits, odd parity, 2 stop bits

• Hw Flow Control - Hardware flow control enable/disable (DEFAULT) using RTS/CTS lines

MDS 05-6399A01, Rev. D MDS Master Station 39

• Vmin - Receive Buffer Size - The minimum number of data bytes that will be buffered by the seri-

al port before handling of the data to be processed by the terminal server. (255 = DEFAULT).

• Vtime - Receive Inter-Byte Timeout - The amount of time between bytes of data on the serial port

(in multiples of 1 millisecond), that indicate the end of a serial message ready to be processed by

the terminal server. (100 = DEFAULT)

Note

Vmin and Vtime setting only have an effect when the serial port is not being used an SD

payload or diagnostics (DLINK) port,

Terminal Server Settings

When configuring a serial port that will be used as a terminal server the VMIN and VTIME settings need

additional explanation. As described above VMIN is a number describing bytes that are received from the

interface, while VTIME is in 100ths of a second (100 milliseconds) intervals. They act together to control

serial data collection and transmission as described below:

• VMIN == 0; VTIME == 0: The terminal server will continuously read to see if a byte if data is

available and process each byte.

NOTE

While this is a valid mode in most cases this causes a high processing load on the device that may impact

performance of other operations of the device.

• VMIN > 0; VTIME == 0: The terminal server waits to process data until at least VMIN bytes of

serial data are received.

• VMIN == 0; VTIME > 0: If serial data is received, the terminal server will continuously read the

number of bytes available until

• VTIME has elapsed then process the data

• VMIN > 0; VTIME > 0: Once an initial byte of input becomes available the terminal server waits

until the MIN bytes have been read, or when the inter-byte timeout expires. The timer is restarted

after each further byte is received and because the timer is started only after the initial byte is re-

ceived, at least one byte will be read

Serial Hardware Flow Control - When port is not being used as a SD payload or SD

diagnostics (DLINK) port:

Hardware Flow Control: When operating in CTSKEY mode, all serial ports in the data path are required

to be set to the same baud rate, and that VMIN and VTIME remain at the defaults for serial data packets

less than or equal to 255 bytes. For serial packets over 255 bytes it is recommended that a cts-delay time

of at least 90ms be used to account for the VTIME delay of the over-the-air sending unit.

Hardware Flow Control Modes - When port is not being used as a SD payload or

SD diagnostics (DLINK) port:

1. DCE

• CTS follows RTS after a programmable CTS delay.

• If the unit’s input buffer approaches a full condition it can deassert CTS regardless of state of RTS.

2. CTSKEY

• Based on legacy MDS devices including TransNET, the device will act similar to a DTE but will

provide signaling on the CTS line instead of the RTS line.

• When the first character of a transmission is ready to be sent to the serial port, the unit shall assert

CTS and delay for CTS delay time expiration before outputting the first character.

40 MDS Master Station MDS 05-6399A01, Rev. D

• After the last character of a transmission is output from the serial port, the unit shall keep CTS as-

serted until the expiration of CTS hold time.

3. CTSKEYPLUS

• The unit shall support flow control (Throttling) on the RTS pin. The device is expected to be wired

via null modem to an external DCE device. The CTS line of the external DCE device drives the

RTS line of the unit.

Monitoring

From the Web UI. the Serial Ports screen shows the settings:

Navigate to: Home / Services / Serial

From the CLI in operational mode, follow the example below to view the state and statistics:

> show configuration services serial | details

ports COM1 {

line-mode rs232;

baud-rate b115200;

byte-format bf8n1;

hw-flow-control false;

vmin 255;

vtime 1;

capability rs485-2-wire,rs485-4-wire;

}

ports COM2 {

line-mode rs232;

baud-rate b19200;

byte-format bf8n1;

hw-flow-control false;

vmin 255;

vtime 1;

capability "";

}

console {

serial-ports [ COM1 COM2 ];

}

MDS 05-6399A01, Rev. D MDS Master Station 41

5.6.2 LAN

Understanding

The Master Station has external Local Area Network (LAN) ports (

ETH1/2

ports) that can be used to

connect to a local (wired) LAN. It supports both IPv4 and IPv6 addresses and may be assigned multiple

IP addresses. The LAN port can be assigned static IP addresses or a dynamically allocated address can be

assigned using DHCP.

NOTE

The LAN port should be assigned IP addresses only if it is a routed interface (that is, not in a

bridge).

Configuring

From the Interfaces screen the status may be displayed by clicking on the interface and scrolling down to

the statistics information:

Navigate to: Home / Interfaces

To configure the LAN interface, select the eth-0/0/0 or eth-0/0/1. As shown in the screens below, there

are five groups of configuration settings that can be configured: eth-0/0/x, Filter, NAT, eth-0/0/x specifics

• Description - User defined identifier for this connection - 0-34 characters

• Type - Identifier of the type of interface - Do Not Change

42 MDS Master Station MDS 05-6399A01, Rev. D

• Enabled - Checked indicates Enabled (DEFAULT). Disable will prevent usage.

• IPv4 Create - Use for creating static IPv4 IP address and removing this interface from the built-in

Network Bridge.

• IPv6 Create - Use for creating static IPv6 IP address and removing this interface from the built-in

Network Bridge.

• Filter Input - Use for selecting and applying a firewall filter (from available filters) to incoming

traffic on this interface.

• Filter Output - Use for selecting and applying a firewall filter (from available filters) to outgoing

traffic on this interface.

• Input - Default Selections (others may have been added) :

• IN_TRUSTED

• IN_UNTRUSTED

• OUT_TRUSTED

• OUT_UNTRUSTED

• Output - Default Selections (others may have been added) :

• IN_TRUSTED

• IN_UNTRUSTED

• OUT_TRUSTED

• OUT_UNTRUSTED

• Source - Source NAT performs translation of source IP address of the traffic going out of the in-

terface. Use for selecting and applying a source NAT rule-set (from available source nat rule-sets)

to outgoing traffic on this interface. Choices:

• MASQ - MASQuerading -

This rule-set translates the source address of the outgoing

traffic to use the interface's IP address. In general, IP masquerading allows the user to

use a private (reserved) IP network addresses on the LAN and still allow these devices

to communicate with devices on the other side of the masqueraded interface that are

not aware of the internal private addresses.

• Destination- Destination NAT performs translation of destination IP address (and, optionally, des-

tination port) of the traffic coming into the interface. Use for selecting and applying a destination

NAT rule-set (from available destination nat rule-sets) to incoming traffic on this interface

• Static - Static NAT performs translation of a network address to another network address for in-

coming and outgoing traffic. Refer to 3.8.10-Static NAT (One to One NAT) page 160. Use for se-

MDS 05-6399A01, Rev. D MDS Master Station 43

lecting and applying a static NAT rule-set (from available static nat rule-sets) to incoming and

outgoing traffic on this interface.

• Eth Phy Rate - Choose the Ethernet speed support setting (DEFAULT ALL)

• Eth 10Mb Half

• Eth 10Mb Full

• Eth 100Mb Half

• Eth 100Mb Full

• Vlan Mode - Virtual LAN Setting. (VLAN Operation): Valid Choices

• None (DEFAULT)

• Access - Use this if this interface is intended to be a member of only a single VLAN.

• Trunk - Use this if this interface is intended to be a member of multiple VLANs.

Using the CLI, the following sequence shows how to configure the

ETH1

port to obtain a dynamic IPv4

address using DHCP:

> configure

Entering configuration mode private

% set interfaces interface eth-0/0/0 ipv4 dhcp

% commit

NOTE

Before configuring a new IP address, be sure to remove the previous address by issuing the command

% delete interfaces interface eth-0/0/0 ipv4

The following sequence shows how to configure the

ETH1

port with a static IPv4 address:

> configure

Entering configuration mode private

% set interfaces interface eth-0/0/0 ipv4 address 192.168.1.11 prefix-length 24

% commit

Monitoring

Ensure the CLI is in Operational mode. Follow the example below to view the state and statistics of the

ETH1

port:

> show interfaces-state interface

eth-0/0/0

interfaces-state interface eth-0/0/0

type ethernet

admin-status up

oper-status up

if-index 3

phys-address 00:06:3d:07:96:82

statistics discontinuity-time 2014-02-12T14:29:35-05:00

44 MDS Master Station MDS 05-6399A01, Rev. D

statistics in-octets 497076597

statistics in-unicast-pkts 6457046

statistics in-multicast-pkts 0

statistics in-discards 17

statistics in-errors 0

statistics out-octets 1002105

statistics out-unicast-pkts 6480

statistics out-discards 0

statistics out-errors 0

eth-phy-status "10 Mb, Half Duplex"

ipv4 forwarding true

ipv4 mtu 1500

PREFIX

IP LENGTH ORIGIN

------------------------------

10.10.10.147 23 static

LINK LAYER

IP ADDRESS ORIGIN STATE

----------------------------------------------------

10.10.10.98 80:c1:6e:f0:3b:7a dynamic reachable

5.6.3 VLAN Operation

Understanding

A Virtual Local Area Network (VLAN) is a logically segmented LAN network that exists across multiple

physical LAN devices. The VLANs are virtual interface types in the Master Station and can be assigned

unique IP addresses. They are treated the same as any other interface type, but they offer a way to link

traffic between member interfaces. As such, a VLAN device can be thought of as a bridging device

Configure

To utilize VLANs, at least one or more VLAN interfaces must be created. Click on Add on the Configu-

ration screen. Below are them minimal steps to set up a VLAN virtual device:

Create the VLAN as an interface with a name.

• Name - The name of the interface. Up to 48 characters.

Configure the newly created VLAN

MDS 05-6399A01, Rev. D MDS Master Station 45

• Description - User defined identifier for the this connection up to 34 characters

• Type - Identifier of the type of interface - Do Not Change

• Enabled - Checked indicates enabled (DEFAULT). Disable will prevent usage.

• Link Up Down Trap Enable - Controls whether linkUp/linkDown SNMP notifications should be

generated for this interface.

• IPv4 Create - Use for creating static IPv4 IP address and removing this interface from the built-in

Network Bridge.

• IPv6 Create - Use for creating static IPv6 IP address and removing this interface from the built-in

Network Bridge.

Scroll down and set the VLAN ID

• Vlan ID - The ID of this VLAN Valid values: 1—4094

• Native Vlan - If true, this is the native VLAN of this device. Native VLAN packets will not egress

as tagged packets.

The example that follows illustrates the result of setting up 2 VLANs; one with an ID of 99 and another

with an ID of 300:

46 MDS Master Station MDS 05-6399A01, Rev. D

Using the CLI to set up a VLAN, four sample commands are shown below for doing this; one with an ID

of 99 and another with an ID of 300:

% set interfaces interface

mgmt_vlan

type vlan

% set interfaces interface

mgmt_vlan

vlan-config vlan-id

% set interfaces interface

video_vlan

type vlan

% set interfaces interface

video_vlan

vlan-config vlan-id

300

Operational Modes

As previously shown in previous sections, interfaces can have three separate VLAN modes: none (de-

fault), trunk, or access. These modes are used to set interface behavior, and examples of their use are pro-

vided below.

Trunk: To add ETH1 as a trunk (tagged) port in both defined VLANs above, the command is:

% set interfaces interface

eth-0/0/0

vlan-mode trunk vlans [

video_vlan mgmt_vlan

]

Access: To set ETH2 as an access port for video_vlan the command is:

% set interfaces interface

eth-0/0/1

vlan-mode access vlan

video_vlan

Native VLANs

A VLAN device may also be specified as a “native” VLAN by checking the Native Vlan box.

Or, using the CLI with this set command:

% set interfaces interface my_native_vlan type vlan vlan-config vlan-id 99 native-vlan true

A native VLAN is conceptually the same as a standard VLAN except that the packets will never be

tagged. The purpose of a native VLAN is to segregate untagged packets on a VLAN trunk port that nor-

MDS 05-6399A01, Rev. D MDS Master Station 47

mally only contains tagged traffic. If a VLAN trunk port receives an untagged packet, and the trunk is a

member of the native VLAN, that packet will be treated as if it came from the native VLAN. If the trunk

port is not a member of the native VLAN and an untagged packet arrives on that port, the packet will be

dropped.

As VLANs are implemented as bridges, and it is not valid for a bridge to be a member of another bridge,

it follows that a VLAN interface cannot be configured as a member of a bridge. VLANs can be config-

ured with IP addresses just as any other interface in the system.

Monitoring

As shown previously once VLANs are created they may be monitored on the Interface status screen the

same way physical interfaces appear:

5.6.4 Bridging

Understanding

The unit supports transparent bridging of LAN, and in firmware versions of 3.0.0 and higher, WiFi and

SD networks. The bridge forwards traffic between LAN interfaces and wireless interfaces at the layer-2 of

OSI model. This allows LAN and wireless clients to be in the same IP sub-network.

The bridge learns the clients’ locations by analyzing the source address of incoming frames from all at-

tached networks. For example, if a bridge sees a frame arrive on LAN port from Host A, the bridge con-

cludes that Host A can be reached through the segment connected to LAN port. Through this process, the

bridge builds a forwarding table (the learning process). When a frame is received on one of the bridge's

interfaces, the bridge looks up the frame's destination address in its forwarding table. If the table contains

an association between the destination address and any of the bridge's ports aside from the one on which

the frame was received, the frame is forwarded out the indicated port. If no association is found, the frame

is flooded to all ports except the inbound port. Broadcasts and multicast also are flooded in this way.

The bridged network is addressable via the ‘bridge’ interface (a virtual interface). The interfaces that are

in the bridge are called bridged interfaces. The interfaces that are not in the bridge are called routed inter-

faces. Bridging is performed between bridged interfaces. Routing is performed between routed interfaces.

The bridge interface itself is a routed interface.

48 MDS Master Station MDS 05-6399A01, Rev. D

NOTE

In firmware versions less than 3.0.0, the SD interface is not a bridgeable interface as there is no

packet or packet-with-MAC mode support in these versions of firmware.

Configuring

Creating a bridge interface and assigning it an IP address:

% set interfaces interface bridge type bridge

% set interfaces interface bridge bridge-settings ageing-time 500

% set interfaces interface bridge ipv4 address 192.168.1.10 prefix-length 24

Adding LAN (ETH1) interface to the bridge:

% set interfaces interface bridge bridge-settings members port eth-0/0/0

Removing LAN (ETH1) interface from the bridge:

% delete interfaces interface bridge bridge-settings members port eth-0/0/0

Removing the bridge interface:

% delete interfaces interface bridge

Monitoring

Ensure the CLI is in operational mode. Follow the example below to view the state and statistics of a

bridge. In this example, bridge (bridge) is bridging the LAN (eth-0/0/0).

> show interfaces-state interface bridge

interfaces-state interface bridge

type bridge

admin-status up

oper-status up

if-index 1

phys-address 00:06:3d:07:96:82

statistics discontinuity-time 2014-02-12T14:29:35-05:00

statistics in-octets 263244716

statistics in-unicast-pkts 3231995

statistics in-multicast-pkts 0

statistics in-discards 4126

statistics in-errors 0

statistics out-octets 785224

statistics out-unicast-pkts 1362

statistics out-discards 0

statistics out-errors 0

ipv4 forwarding true

ipv4 mtu 1500

PREFIX

IP LENGTH ORIGIN

------------------------------

10.10.10.141 23 static

LINK LAYER

IP ADDRESS ORIGIN STATE

------------------------------------------------

10.10.10.98 80:c1:6e:f0:3b:7a dynamic delay

bridge stp port eth-0/0/0

number 1

MDS 05-6399A01, Rev. D MDS Master Station 49

priority 0

state forwarding

path-cost 100

designated-root 7035.04fe7fe36980

designated-cost 100

designated-bridge 8000.0002fd5dd280

designated-port 32783

5.6.5 SDMS Interface

Understanding

The configuring of SD interfaces on the Master Station is performed through a virtual interface called

‘sdms’ (SD Master Station). This virtual interface, much like a bridge interface, is comprised of one or

more sd-nic member physical interfaces. All configurations applied to the virtual SDMS interface will be

propagated to all member sd-nic interfaces. This insures that all SD radio interfaces in the system are

using identical configurations so that interface fail-over is seamless.

Configuring

To access to full suite of SD configuration options, perform the following steps:

1 Click on the “Interfaces” link on the left-hand navigation menu:

2 In the Interfaces Configuration table, click on the “sdms” entry in the “Name” column.

3 In the sdms interface dialog that appears, click on “SD Config”

50 MDS Master Station MDS 05-6399A01, Rev. D

From the SD Config menu, all SD related configuration options can be specified. Primary SD network

configuration can be found under the ‘Radio Config’ menu. IP Payload service configuration can be

found under the ‘IP Payload’ menu. Local and remote device maintenance can be found under the

‘Maintenance’ menu.

Members – The Master Station (sdms) interface is a logical interface that is composed of one or more

physical SD interface cards (sd-nic). The ‘members’ configuration item is the mapping between the

logical sdms interface, and the physical sd-nic cards.

This is factory configured to contain SD radio cards in slot 1 and slot 2 of the Master Station. If the

Master Station is a non-redundant system with only 1 radio card, this will contain only ‘sd-1/0/0’.

5.6.5.1.1 BasicSettings

The Basic Settings contains important RF and modem selections for radio operation.

Radio Mode – The radio can operate in one of several modes. The available selections are:

Packet – With and without AES Encryption

Packet w/MAC – With and without AES Encryption

MDS 05-6399A01, Rev. D MDS Master Station 51

x710 – When using the Master Station in a legacy x710 network.

Transparent – With and without AES Encryption. (Transparent w/AES Encryption requires an all

SD radio network.)

RF Output Power (dBm) – The RF output power may be set between 30 and 40 dBm (1 to 10 watts) in

1 dB increments. The default setting is 40dBm. This setting represents the output power at the Radio

Card. Output power at the antenna port on the back of the unit will be less due to cable, switching, and

duplexer losses. Full power is not required in many cases, and lower settings will place less demand on

the power supply and reduce the chance of interference with other stations. Only the power necessary to

carry out reliable communications should be used.

Modem Type – This setting determines the over-the-air data speed and bandwidth of the radio’s

transmitted signal. All radios in the network must use the same modem setting to communicate with each

other. The default setting is Modem 9600, but it may be set to any of the selections shown in Error!

Reference source not found.. The table also lists modem sensitivity ratings for the various modems. Note

that some modem choices are limited based on the model purchased.

Transmit/Receive Frequency – The receive and transmit frequencies may be viewed or set here. Transmit/Receive Frequency – The receive and transmit frequencies may be viewed or set here.

Frequencies must be entered for the radio to operate. Consult your station license to determine the

authorized frequencies for your system, and enter them exactly as listed.

Keying Mode – Keying mode must be set to one of the following values:

Data – Radio will key upon receipt of payload data.

RTS – Radio will key upon receipt of an RTS (request to send) signal on the serial port. Note:

RTS keying mode is only supported when the radio is in x710 mode.

Data or RTS – Radio will key upon receipt of either payload data or an RTS (request to send)

signal on the serial port.

Continuous – Radio will be continuously keyed. This is primarily used in a transparent streaming

repeater configuration. Note: Continuous keying mode is only supported in x710 mode, or in

transparent mode when operating as a repeater.

System ID – Provides the possibility for Frequency Re-use. System ID offers nine unique choices

including the default value of NONE. The setting NONE is required for mixed networks comprised of

MDS legacy and SDx products. SDx-only networks can utilize the Frequency Re-use feature by setting

the System ID to a common value [1-8] for all radios in a specific network. System ID offers

approximately 20 dB of additional co-channel isolation when operating networks on the same frequency.

Note that proper system design is required.

Operational Example: SDx System “Alpha” has eight units and SDx System “Beta” has eight units. A

user wishes to occupy frequency 952.1235 MHz on both of these systems. Proper system installation has

been adhered to in both networks. System Alpha’s units would all be set to System ID = 1, System Beta's

units would be set to System ID = 5. Both systems will now operate on the same desired frequency.

FCC Part 90 Repeater Mode – Repeater mode must be set to one of the following values:

None – This is the default value, and is used when the Master Station being configured is not to be

used as a repeater in the network.

Repeater – This value should be selected when the Master Station being configured is to be

installed as a repeater in the network, and will not have devices connected to it that will be polled,

such as attached RTUs.

52 MDS Master Station MDS 05-6399A01, Rev. D

Repeater With Local Data – This is the same as “Repeater” but should be used when

data-collection devices such as serial RTUs will be attached directly to the repeating Master

Station.

Serial Payload Port – The front-panel serial port that will be used for serial payload communications.

This can be set to either COM1 or COM2, the default value for this is COM1.

NOTE: Serial port settings such as baud rate and byte format are located under services  serial 

ports.

Encryption – When the Master Station is being using in a network of only SD radios, over-the-air (OTA)

encryption may be enabled. The Master Station uses AES-128, passphrase-based encryption to secure

both payload, and Dlink traffic. If the radio is operating in transparent mode, there is a separate

passphrase for payload and Dlink traffic. If the radio is operating in packet or packet-with-MAC mode,

there is a singular passphrase for all traffic.

5.6.5.1.2 Dlink

Dlink is a GE MDS-proprietary protocol used for diagnostics communications.

Unit – This parameter identifies the radio in the wireless network with a specific ID during diagnostic

sessions. For compatibility with legacy devices, the value must be 10000 or greater (2710 in

hexadecimal).

Dlink Type – This setting identifies the radio as a Node, Root, Repeater, Peer, or Gate. Each of these are

operating modes of the transceiver with respect to diagnostic/management activities.

Mode – Configure if Dlink will operate on a serial port, or via a TCP socket.

Serial Mode Settings:

Serial Port — This setting determines which serial port to use COM1 or COM2. This

must be different than the serial payload port.

TCP Mode Settings:

TCP Port – The TCP port that the Dlink service will listen on.

IPv4 Addr – Optionally configure the service to only attach to the specified IPv4

Address. This is useful when traffic is being separated into data and management

VLANs. If no value is specified, the service will accept connections on all configured IP

addresses.

IPv6 Addr – Optionally configure the service to only attach to the specified IPv6

Address. This is useful when traffic is being separated into data and management

VLANs. If no value is specified, the service will accept connections on all configured IP

addresses.

Enabled – Enable or disable diagnostics functionality. Setting it to ON configures the radio to pass the

diagnostic link protocol (DLINK) over the radio’s COM2 management port.

MDS 05-6399A01, Rev. D MDS Master Station 53

5.6.5.1.3 AudioSettings

NOTE: Audio settings are only available for configuration when the radio is configured to operate in

x710 compatibility mode.

Audio Enabled – If enabled, the radio’s transmit functionality will switch to analog whenever PTT is

asserted.

Rx Level – Receive Audio Output Level to Modem (dBm). Received signal at the peak deviation will be

scaled to the specified value. Valid range is (-20  0).

Tx Level – Transmit audio input level from Modem (dBm). A transmit input signal of the specified value

will translate into the specified peak deviation for transmit. Valid range is (-20  0).

Tx Level Auto – Automatically adjust transmit audio input level from Modem.

Emphasis – When enabled, pre-emphasis is applied on the transmitter and de-emphasis is applied on the

receiver. This setting is typically used in operation with voice radios.

Vox Enabled – Enables or disables the integrated VOX threshold.

Vox Threshold – The audio interface on the Master Station incorporates an integrated VOX circuit to

sample the voltage produced by a connected audio device. When the voltage exceeds a user-defined

threshold, Push to Talk (PTT) is activated, resulting in the transmitter being enabled. The VOX circuit

detects a voltage in the range of 0-2 Volts. A single number in the range of 0-15 is used to describe the

desired threshold level. For example a value of 7 is approximately 1 volt.



54 MDS Master Station MDS 05-6399A01, Rev. D

5.6.5.1.4 AdvancedSettings

Soft-Carrier Dekey – Specifies how long (in ms) to wait after the removal of the keying signal before

actually dropping the transmitter’s carrier. The default setting is 0, but it may be set to any value up to

255 ms. In most cases, no change is required from the default setting. A possible exception is when the

transceiver is inter-working with certain early-generation MDS radio equipment.

Push to Talk Signal – Specifies the sensing polarity of the PTT line. This must be configured to one of

the following values:

Off – PTT line is not used.

Hi – The PTT line is active-high.

Lo – The PTT line is active-low.

Push To Talk Delay – Specifies a brief time delay after a keying event, which must expire before the

radio is allowed to transmit. The allowable range is 0 to 255 ms, with the default being 0.

Clear To Send Delay – Specifies a brief time delay between when an RTS (ready-to-send) signal is

received and when the CTS (clear-to-send) signal is returned. The allowable range is 0 to 255 ms, and the

default is 0.

Automatic Freq. Correction – Automatic Frequency Correction, is used to counteract the slight RF

frequency drift that may occur over time or through wide swings of ambient temperature. AFC should

only be enabled when operating this device as a remote, as all remotes in the system use AFC to track the

master station frequency. Under normal operation, the modem is capable of compensating for small

frequency errors even with this mode disabled. Enabling AFC further extends the frequency capture range

when operating with legacy hardware that may have significant frequency error.

Switched Carrier B Modems – In some networks, the Master unit is not keyed continuously (Ckeyed),

and transmits only when it has data to send to Remotes. This is known as Switched Carrier operation.

The Switched Carrier setting is only for use on radio modems with “B” suffixes (for compatibility with

MDS 05-6399A01, Rev. D MDS Master Station 55

MDS x710 radios). In such networks, the Remote radios should have the Switched Carrier setting turned

ON. The default setting is OFF which assumes B-modem operation with a continuously keyed Master.

Ckey Operation only applies to Master units operating in full-duplex mode only. When operating

continuously keyed, latency is decreased and AFC operation on legacy remotes may be improved.

Switched carrier operation, when low latency is not required, is recommended when operating in high

ambient conditions to reduce power consumption and heating.

Force DCD to Asserted – Some systems require a constant Data Carrier Detect (DCD) signal. This

setting allows the radio to be configured to provide a DCD signal without the need for special cabling.

NOTE: Enabling Force DCD to Asserted will cause the RX LED on the radio interface to turn on,

regardless of whether the radio is receiving data or not.

Data Key Hold Time-out – When operating in data key mode, this parameter specifies the number of

character-times the transmitter will remain keyed for after the last character it receives. For networks with

the demand for a higher modem speed then the baud rate, this parameter can be adjusted from 1 to 10

characters. This parameter gives the overall network better performance by preventing frequent key-up

and key-down sequences between characters. This only applies to networks with all SDx radios.

Simplex Mode – This controls whether or not the Master Station will be running in simplex (switched

carrier) or full duplex mode. If the Master Station is transmitting and receiving on the same frequency,

this must be set to true.

Dlink Mode (B Modems) – Legacy products that only support B-Modems do not have support for Dlink.

Newer products such as the MDS SD have the ability to support Dlink even when using B-Modems.

Depending on site-specific requirements, this value may need to be changed to ‘bypassed’ in order to

work with legacy products. It is recommended to leave this value set to ‘auto’ unless there is an explicit

need to change it.

Rx Mute – The number of milliseconds to mute the receiver after transmitting data. Receive muting

might be required when you configure the radio as a full-duplex polling remote communicating through a

repeater. It prevents the radio from hearing its own transmissions ('echoes') from the repeater, which

might cause software application errors.

5.6.5.1.5 SetEncryptionPhrases

Clicking on the Set Encryption Phrases action will allow you to enter the following values:

Payload – The payload encryption passphrase. Both the sending and receiving stations must have the

same phrase for communication to occur. The phrase must have at least 8 characters (maximum of 38).

Any printable characters may be used.

Dlink – The Dlink encryption phrase when operating in transparent mode w/ AES encryption enabled.

Dlink encryption in transparent mode requires a device supporting this feature at both ends of the link. In

addition, both the sending and receiving station must have the same phrase for communication to occur.

The phrase must have at least 8 characters (maximum of 38), and any printable character may be used.

56 MDS Master Station MDS 05-6399A01, Rev. D

5.6.5.1.6 IPPayload

Under the IP Payload menu, up to three instances of the IP Payload service may be configured. The IP

Payload service can operate in 4 different modes:

 TCPServer

 TCPClient

 TCPServer/Client

 UDP

Each of these modes have different use cases and configuration options, as described below:

TCP Server:

The TCP server mode allows IP connections to be established with the Master Station. Data received on

this TCP socket will be transmitted over the air to remote SD radios as if the data was received on the

payload serial port of the Master Station. Over-the-air serial data originating from a remote SD radio will

be transmitted out of this TCP socket. This mode of operation can be thought of as a ‘remote terminal

server’, not to be confused with the SD remote radio’s Terminal Server functionality.

TCP Server specific configuration options include:

Local IP Port – The TCP port number that the server will listen for connections on.

IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify

that the IP Payload service only will listen for connections on one of the IP

addresses of the system. This is useful in VLAN configurations where you wish

to only make the IP Payload server available on a specific VLAN in the system.

TCP Client

The TCP client mode allows the Master Station to connect to a TCP server when there is traffic to send.

This mode of operation is not often used in Master Station configurations, but may be useful in certain

applications.

TCP Client specific configuration options include:

Server IP Address – The IP address of the server the Master Station is to connect to.

Remote IP Port – The TCP port that the server is listening on.

MDS 05-6399A01, Rev. D MDS Master Station 57

TCP Server/Client

As the name implies, TCP Server/Client is a combination of the TCP Server mode, and TCP Client mode.

In this mode, the Master Station will listen for incoming TCP connections and pass data exactly as in TCP

Server mode. However if there is no active server connection, and over-the-air payload traffic arrives at

the Master Station, the Master Station will establish an outgoing TCP connection to a remote server and

transmit that data to the remote server. A use-case for this mode of operation is if you wish to have the

protocol reliability of TCP, but do not wish to maintain active TCP sessions across your network.

TCP Server/Client specific configuration options include:

Local IP Port – The TCP port number that the server will listen for connections on.

IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify

that the IP Payload service only will listen for connections on one of the IP

addresses of the system. This is useful in VLAN configurations where you wish

to only make the IP Payload server available on a specific VLAN in the system.

Server IP Address – The IP address of the server the Master Station is to connect to.

Remote IP Port – The TCP port that the server is listening on.

UDP

When operating in UDP mode, the IP Payload service uses the connectionless UDP protocol. Since UDP

is connectionless, there must be receiving sockets at each end of the connection to allow for bi-directional

communications. In this mode, when an application has traffic to send out over the SD network, it will

establish a UDP connection to the Master Station and transmit the payload data. When the Master Station

receives over-the-air payload data from remote SD radios, the Master Station will establish a UDP

58 MDS Master Station MDS 05-6399A01, Rev. D

connection to the application and transmit the payload data. These connections are not persistent, and as

such must be established for each transmission. Unlike TCP, transmissions are not guaranteed when using

the UDP protocol; however UDP has a far smaller network overhead than TCP, and as such will result in

lower latency.

UDP specific configuration options include:

Local IP Port – The UDP port number that the server will listen for connections on.

IPv4 Bind IP – If the Master Station is configured with multiple IP interfaces; you can specify

that the IP Payload service only will listen for connections on one of the IP

addresses of the system. This is useful in VLAN configurations where you wish

to only make the IP Payload server available on a specific VLAN in the system.

Server IP Address – The IP address of the server the Master Station is to connect to.

Remote IP Port – The UDP port that the server is listening on.

5.6.5.1.7 Maintenance 

The maintenance sub-menu allows the operator to perform maintenance tasks on both the Master Station

itself as well as the connected SD radios.

5.6.5.1.8  AlarmConfiguration

From this menu, you can control which of the various alarms that can be generated on the SD NIC will be

propagated up to the platform manager for system logging. All alarms default to being enabled, and

should remain enabled unless there is an explicit need to disable one.

5.6.5.1.9 RFKeyTest

Using the RF Key Test action, the active radio can be manually keyed (transmitter enabled) or de-keyed

(transmitter disabled). This may be useful when diagnosing signal-strength on a remote receiver.



MDS 05-6399A01, Rev. D MDS Master Station 59

5.6.5.1.10  SpectrumAnalyzer 

A unique feature of the transceiver is the ability to view the RF spectrum above and below the operating

frequency using its built-in Spectrum Graph. Often, this can assist in diagnosing the cause of interference,

or to view other signals near your operating frequency. To use the Spectrum Graph, you must first

specify a center frequency and a scan width. The center frequency is the frequency that you wish the

spectrum display to be centered on. The span frequency defines the width of the overall spectrum to be

examined.

Once the correct values have been entered, switch it on using the on/off switch. The graph will

automatically refresh itself every 5 seconds. To stop scanning, turn the on/off switch off.

5.6.5.1.11  ForceAlarm

From the Force Alarm menu, you can force the SD radio interface cards to enter a test alarm state. To

activate an alarm, select which radio slot to alarm, and click the Perform action button. An “Alarm Test”

entry will be created in the Event Log, and the external alarm output status is changed. This can be useful

when testing event logging and propagation across a network, or when testing equipment connected to the

alarm output contacts on the Master Station. When enabled, the alarm will assert for 30 seconds, and then

deactivate. If active, it can be manually deactivated prior to timeout by deselecting the slot number of the

radio and clicking the Perform action button again.

5.6.5.1.12  RemoteSDFirmware

OTA Reprogramming Overview

NOTE: This feature is for reprogramming SDx remote radios only. This will not reprogram other Master

Stations on the network.

The “Root” is the central location from which polling originates. Other locations in the network should be

designated as “Nodes” which are the receiving stations. Over-the-air firmware upgrades should always be

initiated from the Root. This ensures that all radios in the network will be properly updated

60 MDS Master Station MDS 05-6399A01, Rev. D

The Master Station broadcasts a series of messages to one or more remote nodes to accomplish the

reprogramming process. The “broadcast” method is used to program the greatest number of radios in the

shortest amount of time; however, the Master Station remains unaware of the number or success of

downstream radios participating in reprogramming.

During reprogramming, the status of the reprogramming will be available on all the radios participating in

the process. Because the initiator is “broadcast-only” this status can only indicate progress toward sending

out of all of the messages. On the nodes, the progress toward completion of reception of reprogramming

information is indicated.

Receiving stations can automatically reboot to the new image after successful reprogramming.

Alternatively, there is an OTA reboot command that can be broadcast from the Master Station to all

receiving stations. This last option instructs the receivers to reboot to a specific firmware revision if

available, and not already running at that revision.

Reprogramming Parameters:

Channel Usage – Set to either Intrusive or Passive as desired.

Passive (Non-intrusive) operation “piggy-backs” reprogramming data onto normal payload data

streams, thus allowing payload data to continue uninterrupted, but will be slower than intrusive

operation. This mode requires payload data to be sent so that the reprogramming data can be

carried. See Table 5-2 for reprogramming times.

Intrusive operation means that the payload application data will be interrupted while

programming data is sent over the air. This is the fastest method of programming radios over the

air, but it comes at the cost of interruptions in the primary use of the radio network. For best

results, data polling should be stopped during Intrusive Reprogramming. See Table 5-3 for

reprogramming times.

Block Size – Sets the overall block size (in bytes) of each data packet. Default setting is 512.

Auto-Reboot – When enabled, the remote radios will automatically reboot after a firmware image

upgrade. If disabled, the newly loaded image will not become valid until the remote radio is rebooted

manually.

Packet Size – Specifies the size of the reprogramming data packets. Default size is 40.

Retry Count – Specifies the number of times each transmission is repeated. Default setting is 3.

Decreasing this value will decrease reprogramming times, but increase the chance of a remote radio not

properly receiving a packet.

Download Delay – Introduce a time delay before reprogramming begins. Typically, it is set to Short, but

may be increased incrementally by selecting one of the extended delay times from the drop-down box

(Short, Medium, Long, None)

MDS 05-6399A01, Rev. D MDS Master Station 61

Table 5-2. Approximate Reprogramming Times - Passive Mode

Modem Speed (bps) Approximate Time Required

4800 6 hours

9600 1 hour, 30 minutes

19200 1 hour, 30 minutes

Radio assumptions: Signal strength -85 dBm or stronger, Packet Size: 40, Block Size: 512, Retry: 3,

Download Delay: Short

Polling assumptions: Serial polling with 1-second poll time, sending random data at 50-100 bytes.

Slower polling times will significantly increase completion time.

Table 5-3. Approximate Reprogramming Times - Intrusive Mode

Modem Speed (bps) Approximate Time Required

4800 1 hour, 30 minutes

9600 30-45 minutes

19200 20-25 minutes

Radio assumptions: Signal strength -85 dBm or stronger, Packet Size: 40, Block Size: 512, Retry: 3,

Download Delay: Short

Polling assumptions: Polling should be temporarily suspended while OTA reprogramming is active.

Start Reprogramming

When ready to reprogram the SD firmware, click the Start Reprogramming action.

Protocol – There are many file transfer protocols supported, select TFTP, SFTP, FTP or HTTP.

Address (All) – Use this field to enter a valid IP address for the host computer (where file to be

transferred resides). For HTTP, this should be a valid URL (e.g. http://192.168.1.1/file.mpk)

File Path (TFTP/SFTP/FTP) – This field is used to enter the exact name of the file and path to be

imported.

Block Size (TFTP) – The TFTP block size to use when transferring the file. Default is 1024.

Port (TFTP) – The TCP port that the TFTP server is operating on.

User Name (SFTP/FTP) – The user to connect to the SFTP/FTP server as.

Password (SFTP/FTP) – The password for the SFTP/FTP server.

Control Port (SFTP/FTP) – The TCP port that the SFTP/FTP server is operating on. Default is 22 for

SFTP and 21 for FTP.

Data Port (FTP) – The TCP port that the FTP server uses for data connections. Default is 20.

62 MDS Master Station MDS 05-6399A01, Rev. D

Timeout (All) – Determines the amount of time (in seconds) that the radio should wait for server to

respond. The default setting is 30 seconds and will not normally require any change.

When the above fields have been set and you are ready to load a new file, click the Begin Reprogramming

button to begin reprogramming. To view the current status of the remote reprogramming operation,

navigate to the sdms interface status page.

Cancel Reprogramming

During the reprogramming operation the user has the ability to cancel reprogramming at any time either

on the Master Station, which will affect all radios, or on individual receiving stations. Note that cancelling

reprogramming at the Master Station results in all radios in the network having only one (instead of two)

applications programmed in their image banks. That is, the “inactive” image (which was only partially

upgraded) will be corrupt and unusable until reprogrammed at a later time.

5.6.5.1.13  PerformFailover

If the Master Station is equipped with redundant SD radios, the active radio can be manually toggled by

selecting the “Perform” action.

NOTE: The manual toggle-switch on the alarm/relay board must be in the ‘Automatic’ position for this

operation to succeed. The toggle-switch will override all software-based control of which radio is active.

5.6.5.1.14  RemoteManagementCommand

The Master Station has the ability to broadcast management commands to remote radios in the network.

These commands are sent to all connected remote radios, and hence should only be used for making

network-wide changes.

The following action can be specified:

Reboot – All remote radios will reboot to the currently active firmware image.

Set Radio Mode – Change the radio mode of remote radios (x710/transparent/packet/packet-with-MAC)

Set Frequencies – Set the receive and transmit frequencies of remote radios.

Set Modem Type – Change the configured modem of remote radios.

Set System ID – Change the configured system ID of the remote radios.

Enable Encryption – Enable or disable OTA encryption on remote radios.

Set Payload Encryption Phrase – Change the payload encryption phrase on remote radios.

Set Dlink Encryption Phrase – Change the Dlink encryption phrase on remote radios. (Only used in

transparent mode)

Repeater Network Change – Change remote parameters that may need to be configured when running

in a network which uses a MDS Master Station as a repeater.

NOTE: It is important to note that with the exception of the reboot command, these actions will cause

permanent loss in connectivity to the Master Station until the corresponding configuration changes are

made to the Master Station itself.

MDS 05-6399A01, Rev. D MDS Master Station 63

Monitoring

Monitoring of the current status of the SD interfaces in the Master Station is performed in a separate

location in the web interface than configuration. To view the current status of the SD interfaces, perform

the following steps:

1 Click on the “Interfaces” link on the left-hand navigation menu:

2 In the Interfaces Status table, click on the “sdms” entry in the “Name” column.

5.6.5.1.15 SDStatus

The SD Status page is split into two sections. The upper section shows the RF performance values of the

currently active SD NIC. The bottom section shows general information about all detected SD NICs in

the chassis.

Active NIC – Shows which SD NIC in the system is currently designated as active.

Measured RF Power – The measured power currently being generated by the active SD NIC.

Signal to Noise – The measured SNR on the active SD NIC.

RSSI – The measured receive signal strength on the active SD NIC.

64 MDS Master Station MDS 05-6399A01, Rev. D

The NIC Status table is composed of the following columns:

 Chassis Slot – The slot in which the SD NIC was discovered.

 Board Temperature – The current temperature in degrees C as measured on the surface of the SD

NIC.

 PA Temperature – The current temperature in degrees C of the power amplifier on the SD NIC.

 Power Draw – The current power draw of the power amplifier in Amperes.

Reprogramming State

Once a remote reprogramming operation has begun, you can view the current status in the

Reprogramming State section of the web page. This information will update upon a page refresh.

MDS 05-6399A01, Rev. D MDS Master Station 65

6 MASTER STATION MODULES

The available modules are listed below and described in the following sections. To aid identification,

most modules have their 4-digit base part number printed on the faceplate. These are the 4 numeric digits

following 03- prefix.

Table 6-1. Available Modules

100-220V AC Power Supply Module 100-220 Vac, 50/60 Hz. 120W Max AC Power Supply Module. Spare

power supply can be used in either of two power supply slots of the MDS

Master Station.

03-6755A02

+/- 12-36 V DC Power Supply Module +/- 12-36 Vdc. 10 A Max. DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master Station.

03-6843A01

+/- 36-75 V DC Power Supply Module +/- 36-75 Vdc. 3.5 A Max DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master Station.

03-6844A01

+/- 75-140 V DC Power Supply Module +/- 75-140 Vdc. 2 A Max DC Power Supply Module. Spare power supply

can be used in either of two power supply slots of the MDS Master Station.

03-6845A01

Platform Manager Module Provides management and data interface functions. 03-6834A01A

SDM9 C-Band Module Full duplex radio module. 928-960MHz FCC Part 24, 101 03-6846A01

Redundant Alarm/Relay Module Active radio relay and alarm/audio interface. 03-6847A01

None-Redundant Alarm Module Non-redundant—Alarm and audio interface. 03-6848A01

Duplexers Spare duplexer in tray wired for MDS Master Station.

9 MHz (932.0-932.5) / (941.0-941.5), COMBINED OUT

24 MHz (928.0-929.0) / (952.0-953.0), COMBINED OUT

31 MHz (928.0-929.0) / (959.0-960.0), COMBINED OUT

9 MHz (932.0-932.5) / (941.0-941.5), RX OUT, RX IN, COMBINED OUT

24 MHz (928.0-929.0) / (952.0-953.0), RX OUT, RX IN, COMBINED OUT

31 MHz (928.0-929.0) / (959.0-960.0), RX OUT, RX IN, COMBINED OUT

03-6837D9B1

03-6837D9C1

03-6837D9D1

03-6837D9B3

03-6837D9C3

03-6837D9D3

6.1 AC Power Supply Module

Figure 6-1 AC Power Supply Module

(Part No. 03-6755A02: 110/220 VAC)

66 MDS Master Station MDS 05-6399A01, Rev. D

Table 6-2 6755 AC Power Supply Module Specifications

Supply Type SMPS AC to DC

Input Voltage Range 100-264VAC

Output 24VDC, 4.0A

Line Frequency 50-60Hz

Power Consumption 120W, Maximum

Protection Integrated thermal protection, short circuit protec-

tion, internal non-serviceable fuse

Ambient Temperature range Full capacity from -30C to +60C.

CSA certified operating range -30C to +39C.

NOTE: Master station power supply modules are field replaceable units that can be removed from an op-

erating system so long as the input power source to the module being replaced has been disconnected.

Refer to 7.4 Replacing Modules for information on removal and installation.

NOTE: When installing AC Power Supply modules, torque thumbscrews to 10 in-lbs to insure optimum

heat transfer through thermal contact connector on the rear of the unit.

6.2 DC Power Supply Module

Figure 6-2. DC Power Supply Module

Including: 03-6843A01: +/- 12-36 Vdc

03-6844A01: +/- 36-75 Vdc

03-6845A01: +/- 125 Vdc

MDS 05-6399A01, Rev. D MDS Master Station 67

Table 6-3 DC Power Supply Module (6843, 6844, 6845) Specifications:

Supply Type SMPS DC to DC

Input Voltage Range +/-36-75VDC, input is isolated from ground

+/-12-36VDC, input is isolated from ground

+/-75-140VDC, input is isolated from ground

Output 24VDC, 4.0A

Line Frequency DC Input only

Power Consumption 120W, Maximum

Protection Integrated thermal protection, short circuit protection, internal

fuse

Ambient Temperature range Full capacity from -30C to +60C

CSA Certified operating range -30 to +50C

NOTE: Master station power supply modules are field replaceable units that can be removed from an op-

erating system so long as the input power source to the module being replaced has been disconnected.

Refer to 7.4 Replacing Modules for information on removal and installation.

NOTE: When installing DC Power Supply modules, torque thumbscrews to 10 in-lbs to insure optimum

heat transfer through thermal contact connector on the rear of the unit.

NOTE: DC power supply modules are available for several different input ranges. These modules have

interchangeable connectors. Make sure the supply is within the rating for the module installed.

6.3 Platform Manager Module

Figure 6-3 Platform Manager Module

(Part Numbers 03-6834Axx)

The Platform Manager module is an orbit based management processor that provides Ethernet and serial

connectivity to radio cards connected on the Master Station backplane. This module features a 10-port

Ethernet switch and USB hub for backplane connectivity to a number of radio modules.

NOTE: The Platform Manager module does not support hot swappable field replacement; power must be

removed from the system before removal or installation of this device. Refer to 7.4 Replacing Modules

for information on removal and installation.

68 MDS Master Station MDS 05-6399A01, Rev. D

The Platform manager is available with and without GPS for time of day and synchronization purposes

for future radio module offerings. When ordered with WiFi, the Platform Manager module may be con-

figured using a tablet, smartphone, or other WiFi enabled web device.

The Interfaces on the front panel of the Platform Manager are described below. Note that the small con-

nector on the bottom right, just above the part number, is currently unused.

6.3.1 Platform Manager LED Indicators

The Platform Manager has BLUE LEDs to indicate Platform Manager power on, system initialization,

and Master Station alarm status. The behavior of these LEDs is described below.

Table 6-4. Platform Manager LEDs

LED Name Behavio

Meaning

PWR BLUE

FLASHING Power Applied

System Initialization

ALARM BLUE

FLASHING BLUE

OFF

Pre-boot Validation or System Initialization

Master Station Alarm

No Alarm

6.3.2 Ethernet Interfaces

The Ethernet interfaces have built-in MDIX (auto-sensing) capability, allowing either a straight-through

or crossover cable to be used.

Figure 6-4 Ethernet Port (RJ-45) Pinout

(As viewed from the outside)

Table 6-5 Ethernet Interface Pin Descriptions

Pin Functions Ref.

1 Transmit Data (TX) High

2 Transmit Data (TX) Low

3 Receive Data (RX) High

4 Unused

5 Unused

6 Receive Data (RX) Low

7 Unused

8 Unused

87654321

MDS 05-6399A01, Rev. D MDS Master Station 69

6.3.3 COM1 Interface

COM1 supports the RS-232 serial data format at serial data rates of 300, 1200, 2400, 4800, 9600, 19200,

38400, 57600, and 115200 bps (asynchronous only).

Figure 6-5 COM1 Connector (RJ-45)

As viewed from outside the unit

NOTE: COM1 is hard-wired as a DCE device.

Table 6-6. COM1 Pin Descriptions

Number Radio Input/

Output Pin Description

1 OUT

DSR (Data Set Ready)

2 OUT

DCD (Data Carrier Detect/Link)—A high indicates signal

received.

3 IN

DTR (Data Terminal Ready)

4 -- Ground—Connects to ground (negative supply potential)

on chassis.

5 OUT

RXD (Received Data)—Supplies received data to the

connected device.

Ground—Connects to ground (negative supply potential)

on chassis.

6 IN

TXD (Transmitted Data)—Accepts TX data from the

connected device.

7 OUT

CTS (Clear-to-Send)—Can be used for flow control or as

an output to key another connected radio.

8 IN RTS (Request-to-Send)—Can be used for flow control or to

key the transmitter.

6.3.4 COM2 Interface

The COM2 port supports the RS-232 or RS-485 serial data format at serial data rates of 300, 1200, 2400,

4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous only).

Pin Descriptions—RS-232 and RS-485

Pin descriptions for the COM2 data port in RS-232 mode and RS-485 modes are provided below.

NOTE: In addition to RS-485 mode, the radio is capable of operating in RS-422 mode. Con-

figure the port for RS-485 but follow the RS-422 wiring arrangements shown in below

70 MDS Master Station MDS 05-6399A01, Rev. D

under COM2 RS-485 and RS-422 Wiring Arrangement.

Figure 6-6. COM2 Connector (RJ-45)

As viewed from outside the radio

NOTE: COM2 is hard-wired as a DCE device.

Table 6-7. COM2 Pin Descriptions—Radio in RS-232 Mode

Num-

ber

Radio

Input/

Output

Pin Description

1 --

Reserved—Do not connect

2 --

Reserved—Do not connect

3 --

Reserved—Do not connect

4 -

Ground—Connects to ground (negative supply potential) on the

radio’s PC board.

5 OUT

RXD (Received Data)—Supplies received data to the

connected device.

6 IN

TXD (Transmitted Data)—Accepts TX data from the

connected device.

7 OUT

CTS (Clear-to-Send)

8 IN

RTS (Request-to-Send)

MDS 05-6399A01, Rev. D MDS Master Station 71

Table 6-8 COM2 Pin Descriptions—Radio in RS-485 Mode

Number Input/

Output

Pin Description

1 --

Reserved—Do not connect

2 --

Reserved—Do not connect

3 --

Reserved—Do not connect

4 -

Ground—Connects to ground (negative supply potential) on

the radio’s PC board.

5 IN

TXD+/TXB (Transmitted Data +)— Non-inverting receiver

input

6 OUT

RXD+/RXB (Received Data +)—Non-inverting driver output.

7 IN

TXD-/TXA (Transmitted Data -)— Inverting receiver input

8 OUT

RXD-/RXA (Received Data -)— Inverting driver output.

COM2 RS-485 and RS-422 Wiring Arrangement

• RXD+ / RXB and RXD– / RXA are data received by the radio and transmitted

• RXD+ / RXB is positive with respect to RXD– / RXA when the line input is a “0”

• TXD+ / TXB and TXD– / TXA are data sent to the radio to be transmitted

• TXD+ / TXB is positive with respect to the TXD– / TXA when the line output is a “0”

Table 6-9 EIA-422 4-Wire Connections

External DB-9 COM2

TXD- 2 7 TXD-

RXD- 3 8 RXD-

RXD+ 7 6 RXD+

TXD+ 8 5 TRD+

Table 6-10 EIA-485 2-Wire Connections

External DB-9 COM2

TXD- 2 RXD-/TXD-

RXD- 3

RXD+ 7 RXD+/TXD+

TXD+ 8

6.3.5 Mini USB Interface

The USB Interface follows standard Mini-USB wiring and protocol. This interface can be used to access a

command line user interface when connected to a computer USB port and the GE provided driver is

installed. Refer to 3.6.3 Mini USB for more information.

6.3.6 Wifi Antenna Interface (Optional)

Integrated Wifi is a future option.

72 MDS Master Station MDS 05-6399A01, Rev. D

6.3.7 GPS Antenna Interface (Optional)

Integrated GPS is a future option.

6.4 SD Master Radio Modules

Figure 6-7. SD Radio Module

(Part No. 03-6846Axx—SDM9)

The SD Master Radio Modules are field replaceable, hot swappable, full duplex radios offering narrow-

band communications. Current offerings include variants that span 800-960MHz.

NOTE: Master station Radio modules are field replaceable and hot swappable. Refer to 7.4 Replacing

Modules for information on removal and installation.

NOTE: When installing Radio Modules, torque thumbscrews to 10 in-lbs to insure optimum heat transfer

through thermal contact connector on the rear of the unit.

6.4.1 SD Master Radio Module LED Indicators

The SD Radio Modules have bi-color green/red LEDs to indicate power, alarm, and active/standby status

as shown in the table below. Blue LEDs to indicate receiver transmit and receive are also provided.

Table 6-11. SD Radio Module LEDs

LED Name Behavio

Meaning

PWR/ALARM

GREEN

FLASHING RED

FLASHING GREEN

Alternating with ACTIVE

Power applied

Alarmed radio

Radio power-up

Firmware is updating

ACTIVE GREEN

OFF

Alternating with PWR

Active

Standby

Firmware is updating

TX BLUE Transmitting

RX BLUE Receiving

6.4.2 SD Master Radio Module RF Interface

SD Radio Modules include keyed RF Connectors for front connection to either an Alarm/Relay Module,

if used in a redundant system, or to the front of the duplexer tray if used in a non-redundant system.

Different cables are used in each case. Systems assembled by the factory come pre-wired using the

MDS 05-6399A01, Rev. D MDS Master Station 73

appropriate cabling. If replacing a module, use the cables provided with the original system. For more

information refer to the appropriate section below for the specific Radio Module

6.4.3 SDM9 Radio Module – 900MHz

The SDM9 is an SD Master Radio Module with several variants to accommodate different frequency

bands. Current offering is the SDM9C which supports 928-960MHz. Refer to the table below for

detailed information about this transceiver.

Table 6-12 6846 SDM9 Radio Module Specifications

Frequency Band 820-870MHz (Pending)

880-915MHz (Pending)

928-960MHz (SDM9C)

Duplex Modes Full

Half Duplex, Switched Carrier

Half Duplex, Single Carrier (Simplex)

Half Duplex modes may operate using software

enabled integrated T/R switch for installations that

do not require a duplexer.

Transmit Power +40dBm, Maximum. Software programmable

from _+30 to +40dBm in 1dB steps.

Receive Noise Figure <6dB

Adjacent Channel Rejection 60dB typical (EN300-113)

Power Consumption 60W, Max, at full duplex with continuous transmit,

+40dBm

Antenna Connector Dual FAKRA-SMB

6.4.4 SDM4 Radio Module - 400 MHz

(Part No. 03-68xx—SDM4, Future Availability)

The SDM4 is an SD Radio Module with variants that span 300-512MHz.

Table 6-13 SDM4 Radio Module Specifications

Frequency Band 300-350MHz (Pending)

350-400MHz (Pending)

400-450MHz (SDM4B)

450-512MHz (SDM4C)

Duplex Modes Full

Half Duplex, Switched Carrier

Half Duplex, Single Carrier (Simplex)

Half Duplex modes may operate using software

enabled integrated T/R switch for installations that

do not require a duplexer.

Transmit Power +41.1dBm, Maximum. Software programmable

from _+30 to +41dBm in 1dB steps.

Receive Noise Figure <6dB with AGC at maximum gain

Adjacent Channel Rejection 60dB, minimum (EN300-113)

Power Consumption 60W, Max, at full duplex with continuous transmit,

+40dBm

Antenna Connector Dual FAKRA-SMB

74 MDS Master Station MDS 05-6399A01, Rev. D

6.5 Alarm and Alarm/Relay Modules

Figure 6-8 Alarm/Relay Module

(Part No. 03-6847Axx; 03-6848Axx)

There are 2 versions of the Alarm Module depending on whether the system is redundant or

non-redundant. The module pictured above is for redundant systems.

Table 6-14 Alarm Modules

Part

Number Description System Interfaces and Indicators

03-6847Axx Alarm/Relay

Module Redundant



RX/TX RF Connection for Radio A, Radio B,

and OUT.

 Relay to switch RF OUT based on active A or B.

 Toggle Switch to select active A/B or Auto

 Alarm and Active LEDs

 Alarm/Audio Connector

03-6848Axx Alarm

Module Non-Redundant



Does not include RF Connections

 Does not include Relay

 Does not include Toggle Switch

 Alarm and Active LEDs

Both versions of this module provide user connections for external alarm dry contacts and four wire au-

dio.

NOTE: The Alarm or Alarm/Relay module does not support hot swappable field replacement; power

must be removed from the system before removal or installation of this device. Refer to 7.4 Replacing

Modules for information on removal and installation.

6.5.1 Alarm Module LEDs

The Alarm Module includes LEDs to indicate the active Radio Module (A or B) as well as the presence of

a Major or Minor Alarm.

MDS 05-6399A01, Rev. D MDS Master Station 75

Table 6-15. Alarm Module LEDs

LED Name Behavio

Meaning

ALARM MAJ. RED On—Major Alarm (Master Station)

ALARM MIN. RED On—Minor Alarm (Master Station)

ACT A BLUE On—Radio A Active

Off—Radio A Standby

ACT B BLUE On—Radio B Active

Off—Radio B Standby

6.5.2 Alarm/Audio Interface

The ALARM/AUDIO Interface on the Alarm/Relay module provides audio signaling and alarm outputs as

shown below.

AUDIO:

 4-wire audio circuits are connected to pins 1 through 4 as shown in Figure 9.

 Terminals 1 and 2 are for transmit audio input with a nominal 600 impedance.

 Terminals 3 and 4 provide a receive audio output with a nominal 600  impedance.

 Pins 5 connects to an external keying source. Shorting pins 5 to pin 7 can key the radio when PTT

LOW is configured in software. When PTT is configured high in software, pulling PTT to 3.3V

keys the radio.

The interface is compatible with an external VOX adapter even though this product features an integrated

VOX circuit with digital threshold control. For applications using the external VOX adapter, 12VDC on

pin 6 can be used to power the external module.

ALARMS:

 Terminals 8 and 9 provide solid state relay contacts that close when a minor alarm is detected.

 Terminals 10 and 11 provide relay contacts that close when a major alarm is detected. You can

redefine these relay contacts using the radio’s software (switched from minor to major alarm

outputs, or vice versa). The contacts are rated for non-inductive loads up to a maximum 60 Volts

(AC or DC) at 1 A.

Analog RSSI:

When enabled in software, an RSSI voltage of 0 to 3V corresponding to -120 to -70dBm is present on this

line.

+12v 6  12 Analog RSSI

PTT 5  11 Major Alarm -

Rx Audio - 4  10 Major Alarm +

Rx Audio + 3  9Minor Alarm -

Tx Audio - 2  8Minor Alarm +

Tx Audio + 1  7Ground

Figure 6-9: Alarm/Audio Connections

(As viewed from outside the radio)

76 MDS Master Station MDS 05-6399A01, Rev. D

6.5.3 Alarm/Relay Toggle Switch (6847 Only)

For redundant units, the Alarm/Relay module includes a manual override toggle switch, which can be

set into one of three positions to associate it with a particular radio. The toggle switch is locking, and

must be pulled out to change positions. Switch functions are as follows:

 Up—Radio A

 Down— Radio B

 Center—Automatic.

When the switch is set to Automatic, the active radio is determined by radio module presence and alarm

status.

NOTE: If only one radio module is installed (A or B) it is recommended that the switch be set to A or B,

as appropriate.

The non-redundant version of the Alarm Module does not include the Toggle Switch.

6.5.4 Alarm/Relay RF Connections (6847 Only)

For redundant systems, the Alarm/Relay module includes a RF Connections for both the A and B Radio

Module, and RF OUT. These are all Dual FAKRA-SMB connectors. RF OUT is switched between Radio

A and Radio B depending on the currently active radio. RF OUT is normally cabled to the Duplexer tray

faceplate, even on systems that do not include a duplexer. Redundant systems come from the factory al-

ready properly cabled between the Radio Modules, Alarm/Relay Module and Duplexer tray faceplate.

Connectors are keyed to ensure proper orientation.

Non-redundant systems using the 6848 Alarm Module do not include RF Connections.

6.6 Duplexer Tray

Current Master Station offerings always include a Duplexer tray whether or not an internal duplexer is

included. This allows consistent cabling from either the Radio Module (non-redundant systems) or the

Alarm/Relay Module (redundant systems) to the faceplate of the Duplexer tray. Wiring internal to the

Duplexer Tray routes RF Signals to the antenna connections on the back of the Master Station as

appropriate to the order configuration.

RF Connection to the front of the duplexer tray depends upon order configuration and frequency plan.

Table 6-16. Cabling to the Duplexer Tray Faceplate

Duplexer

Option Frequency

Plan Cable

From - To

ntenna Connection

on Back Comment

Internal TX > RX TX - HIGH

RX - LOW COMBINED OUT Cable by Frequency Plan to High/Low

Internal TX < RX TX - LOW

RX - HIGH COMBINED OUT Cable by Frequency Plan to High/Low

Simplex TX > RX

TX = RX

TX < RX

TX - HIGH

RX - LOW TX

Software configurable single or dual

antenna port.

External TX > RX

TX < RX TX - HIGH

RX - LOW TX

RX Wire TX to High always, independent

of Frequencies

MDS 05-6399A01, Rev. D MDS Master Station 77

NOTE: Older versions of the Duplexer Tray faceplate read TX instead of High and RX instead of Low.

In this case, for configurations with internal duplexer in which the TX frequency is lower than the RX

frequency, swap the cables on the Duplexer Tray such that TX is cabled to the port labelled RX and RX is

cabled to the port labelled TX.

78 MDS Master Station MDS 05-6399A01, Rev. D

7 TROUBLESHOOTING

If trouble occurs with the unit, verify that it meets the basic requirements listed below. These items should

be checked prior to starting any detailed troubleshooting or calling for assistance. All units must have:

• Adequate and stable primary power

• Secure cable and wiring connections

• Proper configuration for the application

Most radio system problems are due to the failure of components outside of the transceiver—such as a

poor or broken feed line or antenna connection. This section will help you determine whether the problem

is outside or inside the radio and, if in the radio, how to restore operation as quickly as possible.

GE MDS does not recommend component-level repairs in the field. However, you can replace the radio’s

major assemblies without using tools or test equipment. Section 7.4 Replacing Modules covers this in

detail.

NOTE: Before starting any detailed troubleshooting, check the basic requirements at both ends of the

link: primary power, secure cable connections, and proper antenna heading. In many cases, one of these

causes poor operation or a complete loss of link service.

7.1 Interpreting Module LEDs

The LEDs on the front of installed modules provide useful information when troubleshooting. Refer to

Section 6 Master Station Modules for detailed descriptions for module LEDs. Power and alarm indica-

tors are provided on Platform Manager (6.3.1), Radio (6.4.1), and Alarm/Relay modules (6.5.1). Radio

Modules also have TX/RX LEDs to show wireless activity.

7.1.1 Normal Operation

During normal, operation, there should not be any Red LEDs illuminated. All illuminated LEDs should

be BLUE or GREEN.

MDS 05-6399A01, Rev. D MDS Master Station 79

Table 7-1. Status LEDs – Normal Operation

Platform Manager PWR

ALARM

ETH1/ETH2

BLUE

OFF

Flashing with Ethernet traffic

Active Radio Module PWR/ALARM

ACTIVE

GREEN

Flashing BLUE when transmitting

Flashing BLUE when receiving

Standby Radio Module

(if present) PWR/ALARM

ACTIVE

GREEN

OFF

Alarm Module

ALARM MAJ.

ALARM MIN.

ACT A & ACT B

OFF

One BLUE, one OFF

7.1.2 Exception and Alarm States

The first indication of a problem is usually an illuminated ALARM LED on one or more of the modules.

The first place to look is the Alarm or Alarm/Relay module. If the PWR/Alarm LED is RED

Table 7-2. Status LEDs – Exception and Alarm States

Module LED Behavior Meaning Troubleshooting Action

Platform Manager PWR Flashing

(BLUE) Booting / System

Initialization Wait several minutes for

system to boot.

Platform Manager ALARM Flashing

(BLUE) Master Station

Alarm Use Device Manager to

determine Alarm

Radio Module PWR/ALARM Flashing

GREEN Radio power up Wait several seconds for

radio to boot.

Radio Module PWR/ALARM

& ACTIVE Alternating Radio Firmware

update Wait several minutes for

firmware upgrade to com-

plete.

Radio Module PWR/ALARM Flashing

RED Radio Alarmed Use Device Manager to

determine Alarm

Radio Module(s) ACTIVE Both/Only

Modules

OFF

No active radio in

the system

(Alarm/Relay Mod-

ule may still indi-

cates Active A or B)

Select Radio with A/B

Toggle Switch. Return to

Auto (Redundant System)

Remove and re-seat radio

module.

Both Radio

Modules

(Redundant

Only)

ACTIVE Both Mod-

ules GREEN System ERROR -

both radios active

(Alarm/Relay Mod-

ule may still show

only one active)

Select Radio with A/B

Toggle Switch. Return to

Auto

Remove and re-seat one or

both radio modules.

Alarm Module ALARM MAJ.

ALARM MIN.

RED Master Station Ma-

jor or Minor Alarm. Use Device Manager to

determine Alarm

80 MDS Master Station MDS 05-6399A01, Rev. D

7.2 Redundant Units

The active radio can be identified by the corresponding LED on the alarm/relay module as well as the

active LED on the radio module. The active unit is normally selected automatically. For troubleshooting,

the toggle switch can be used to manually set the active radio. Alternatively, the switch can remain in the

automatic position, and the active radio can be selected via the SD Manager UI.

7.3 Technical Assistance

Factory technical assistance is available by contacting GE MDS during business hours (8:30 AM to 6:00

PM Eastern Time). For telephone assistance, call (585) 241-5510, or visit our website at www.gemds.com

for additional contact options.

7.4 Replacing Modules

Component-level repair of a transceiver board in the field is not recommended due to the complex nature

of the circuitry and the use of surface-mount technology throughout the radio. You should return mal-

functioning assemblies to the factory (or authorized service center) for repair or replacement.

One approach to field-level servicing is to have spare modules available. Slide in modules are easily field

replaceable, including Power Supply, Radio, Platform Manger, and Alarm/Relay Modules. Internal Du-

plexers can also be replaced in the field. In this way, you can quickly remove and replace a defective as-

sembly with a working assembly. The following instructions describe the removal and installation of

these assemblies.

NOTE: When installing Power Supply or Radio Modules, torque thumbscrews to 10 in-lbs to insure op-

timum heat transfer through thermal contact connector on the rear of the unit.

7.4.1 Power Supply Modules

The two left-most card-slots on the MDS Master Station are dedicated to Power Supply Modules. To re-

move either of these assemblies, first disconnect the power supply cable. Loosen the two thumbscrews on

the front of the module, then slide the module straight out.

A Power Supply Module can be installed in either of the left-most slots on the Master Station. It will not

engage if an attempt is made to install into any other slot in the chassis. To install, align the Module with

the card guides and slide into the chassis until it engages with the backplane connectors. Push firmly on

the faceplate of the module to ensure a good connection and hand-tighten the thumb screws. The thumb

screws should be further tightened to 10 in-lbs to ensure optimum heat transfer through thermal contact

connector on the rear of the unit.

Connect the power cable first making certain that the supply is within the rating for the power supply

module you have installed.

6755 100-220 AC Power Supply Module 100-220 Vac, 50/60 Hz. 120W Max AC Power Supply Module.

6843 +/- 12-36 VDC Power Supply Module +/- 12-36 Vdc. 10 A Max. DC Power Supply Module.

6844 +/- 36-75 VDC Power Supply Module +/- 36-75 Vdc. 3.5 A Max DC Power Supply Module.

6845 +/- 75-140 VDC Power Supply Module +/- 75-140 Vdc. 2 A Max DC Power Supply Module.

MDS 05-6399A01, Rev. D MDS Master Station 81

NOTE: DC power supply modules are available for several different input ranges. These modules have

interchangeable connectors. Make sure the supply is within the rating for the module installed.

On a redundant unit equipped with two power supplies, a supply can be removed, and a new supply can

be installed, while the unit is powered and operational. Do not remove power supplies whose power

source is still connected and active.

7.4.2 Peripheral Modules – including Platform Manager, Radio, Alarm,

and Alarm Relay Modules.

Peripheral slots on the Master Station include all slots between the power supply modules (on the left)

and the duplexer tray (on the right). On an MDS Master Station, the peripheral slots are populated with

the following modules, from left to right: Platform Manager, Radio Module, a second Radio Module if

redundant, and an Alarm Module or Alarm/Relay Module if redundant.

To remove peripheral modules, first disconnect cables attached to the faceplate of the module you are

removing. Label connections if necessary to remember how connections are made. Loosen the two

thumbscrews on the front of the module, then slide the module straight out, moving other cables out of

the way as necessary.

To install a peripheral module, align the module with the card guides and slide into the chassis until it

engages with the backplane. Push firmly on the faceplate of the module to ensure a good connection and

hand-tighten the thumb screws. The thumb screws can be further tightened with a screwdriver. Radio

Modules should be tightened to 10 in-lbs to ensure optimum heat transfer through thermal contact con-

nector on the rear of the unit.

Reconnect faceplate cabling connections to other modules as necessary.

7.4.3 Hot Swap Redundant Modules

On a redundant unit equipped with two Power Supplies and two Radio Modules, these modules can be

removed and/or installed while the unit is powered and operational. Replacing a Power Supply does re-

quire first removing the supply input for the module, but the alternate Power Supply can remain powered.

The unit will continue to operate using a single power supply.

When removing a Radio Module on a redundant unit, we recommend changing the selector switch on the

Alarm/Relay Module to lock the active radio to A or B as appropriate before removing the other Radio

Module. This should be done even if the desired radio is already active. The manual override toggle

switch is locking, and must be pulled out to change positions. Switch functions are as follows:

Up—Radio A; Down— Radio B; Center—Automatic.

Once a new Radio Module is installed, the Select Switch should be returned to the Center (Automatic)

position for redundant operation.

7.4.4 Internal Duplexer Tray

The duplexer tray can be removed by first removing two screws on the top of the chassis holding the tray

in place. Save these screws. Disconnect all cabling to both the faceplate of the duplexer and on the back

of the unit. Once cabling and screws have been removed, push on the connectors on the back of the unit to

free the tray from the chassis and then slide out the front. To install a new tray, slide the tray in allowing

the connectors to push through the back of the chassis. Use the same screws to secure the front of the tray

to the chassis and then reconnect cabling being careful to connect TX and RX cables from the Alarm

Module to the correct faceplate connections on the Duplexer Tray.

82 MDS Master Station MDS 05-6399A01, Rev. D

MDS SDM4—400 MHz Notch-Type Duplexers

You can generally change the radio’s transmit frequency up to 100 kHz without re-tuning the duplexer.

The duplexers shown in Figure 7-1. 400 MHz Notch Duplexer

can be aligned in the field by experienced technicians using high-quality test equipment. For assistance,

contact GE MDS Technical Support for additional details about tuning.

Figure 7-1. 400 MHz Notch Duplexer

(Adjustment generally not required for transmit changes up to 100 kHz)

Duplexer alignment is a sophisticated procedure and a duplexer can

be easily damaged if not handled carefully. It is highly recommended

that you return duplexers needing realignment to GE MDS, or the

original duplexer manufacturer, for alignment. In some cases, it may

be more economical to replace the unit than to have it realigned.

MDS SDM9—Bandpass-Type Duplexers

These duplexers (Figure 7-2. 900 MHz Bandpass Duplexer

) typically allow the transmitter frequency to change up to 500 kHz without undesired results. Since this

type of duplexer cannot be re-aligned in the field, we recommend contacting the GE MDS Technical

Support Department if you suspect a duplexer problem or need one for a different frequency.

Figure 7-2. 900 MHz Bandpass Duplexer

(Adjustment generally not required for transmit changes up to 500 kHz)

POSSIBLE

EQUIPMENT

DAMAGE

MDS 05-6399A01, Rev. D MDS Master Station 83

7.5 Testing and Removing an Internal Duplexer

Testing

If you suspect that the internal duplexer is not functioning properly, perform the following steps to deter-

mine if requires replacement:

127. Measure the RF power out of the antenna jack.

 If the power registers approximately +37 dBm (5 watts), the internal duplexer is probably func-

tioning correctly (see Table 8-1 dBm–Volts–Watts Conversion Chart for dBm-volts-watts

conversion chart).

 If the power registers significantly less than +37 dBm, proceed with Step 2.

2. Locate the TX SMA connection on the front of the duplexer tray.

3. Using an adapter, connect the RF power meter to the SMA Cable on the front of the unit

• If the power registers +39 dBm, the radio board is functioning correctly.

• If the power registers less than +39 dBm, proceed with Step 4.

4. Use the front panel to switch to the alternate transmitter and again measure the RF power output.

• If the alternate transmitter registers +39 dBm, the internal duplexer probably needs replacing.

5. Before replacing the duplexer, verify that the highest or lowest frequencies marked on the duplexer are

the same as radio’s transmit and receive frequencies or within the nominal operating range: 100 kHz

for 400 MHz radios, and 500 kHz for 900 MHz radios.

Removing the Internal Duplexer

To remove the internal duplexer, follow these steps:

1. Disconnect the antenna cables from the back of the chassis.

84 MDS Master Station MDS 05-6399A01, Rev. D

Internal Duplexer Cabling: A number of different duplexers can be installed in the radio. While the

physical appearance of the duplexer may vary slightly, its operation and removal remain the same.

2. Disconnect the SMA cables from the front of the duplexer tray

2. Remove the two screws on the top of the unit that secure the duplexer tray into the front of the chassis.

3. Carefully slide the duplexer tray out the front of the chassis by applying pressure to the antenna

N-connectors on the rear of the unit.

MDS 05-6399A01, Rev. D MDS Master Station 85

4. Remove four screws to remove the duplexer assembly from the tray

Use care when removing the duplexer. Physical damage may cause detuning.

86 MDS Master Station MDS 05-6399A01, Rev. D

Figure 7-3. Internal Duplexer Removal

POSSIBLE

EQUIPMENT

DAMAGE

MDS 05-6399A01, Rev. D MDS Master Station 87

8 TECHNICAL REFERENCE DATA

8.1 RF Propagation Planning

Establishing a reliable point-to-point radio link requires system planning and design. You should have an

understanding of the physical parameters affecting propagation. The following material discusses these

factors and will assist you in designing a dependable transmission path for your radio link.

NOTE: This section is intended for use as a guideline when planning transmission paths. It does not

consider all of the local conditions that may be present, nor does it guarantee that adequate signal strength

will be obtained in a given system. There is no substitute for an on-the-air test to verify the predicted path

results, and to check the overall operation of the radio system.

To ensure a highly reliable path, a line of sight between both ends of the link is desirable. For short paths

(up to 5 kilometers/3.1 miles), some obstructions might be acceptable, but the performance of a blocked

path is always less predictable than a clear path.

8.1.1 Fresnel Zone Clearance

As the distance spanned by a link gets longer, it is necessary to have more than just a grazing path be-

tween the two ends; the path must clear the ground or other obstacles by some percentage of a Fresnel

zone.

The Fresnel zone corresponds to the width or girth of the radio signal. There are first, second, and third

Fresnel zones, but the first zone is the only one that has substantial effects on signal strength.

The first Fresnel zone can be visualized as an oval-shaped volume between two station antennas (Figure

8-1 ). As the width of the radio wave front gets blocked by obstructions, less of the signal can get to the

receiver antenna.

In addition to blocking the signal, obstructions in the first Fresnel zone may also cause multipath inter-

ference due to reflective and refractive signal paths. The reflected or refracted signal might arrive at the

receiver out of phase with the desired signal and cause a canceling effect.

Figure 8-1 Fresnel Zone Obstructions

As a matter of practice, 60 percent of the first Fresnel zone must be clear of obstructions (0.6 x F) to al-

low a clear, unobstructed RF path.

Remember, the first Fresnel zone calculation is only one parameter determining path quality.

88 MDS Master Station MDS 05-6399A01, Rev. D

Earth Curvature

As the distance of a communication link increases, the clearance problem is compounded by the earth’s

curvature. Radio waves traveling through typical atmospheric conditions bend slightly, which is repre-

sented by treating the earth as though it were slightly flatter than it actually is. Experience has shown that

if we consider the earth’s radius 4/3rds of its actual size, we get good agreement between theory and

measured propagation results.

The figure below shows a representation of the 4/3 earth “radio horizon.” This figure shows that under

normal radio propagation conditions, a station with its antenna 15 meters above flat terrain will have a

radio horizon approximately 15 kilometers away, well beyond the visual horizon.

Figure 8-2. Antenna Height vs. Theoretical Radio Horizon

Fade Margins

Variations in the temperature and humidity of the atmosphere with elevation cause the signals to bend

more or less, resulting in fading at the receiver. The longer the path, the more likely that deep fades will

occur, hence the greater the fade margin required.

Different parts of the world have differing propagation conditions, which can be categorized as favorable,

average, or adverse. In general, mountainous areas have favorable propagation conditions, while tropical

areas and those near large bodies of water have adverse conditions.

Calculating Path Loss

Assuming that we have satisfied the line-of-sight and first Fresnel zone clearance requirements, we can

calculate the path loss. At 450 MHz, the loss between two isotropic radiators (0 dBi antennas) that are 1

km apart is 86 dB. For every doubling of distance, the loss increases by an additional 6 dB. Knowing this,

the output power (+37 dBm), and the receiver sensitivity, we can calculate antenna size and tower height

requirements to cover any desired distance.

8.1.2 Formulas for System Planning

The following standard formulas are provided for assistance in determining system installation parame-

ters.

MDS 05-6399A01, Rev. D MDS Master Station 89

Free Space Path Loss

where:

fs = free space loss in dB

d = path distance in kilometers

ƒ = frequency in GHz

Fresnel Zone Boundary

where:

n= Fresnel zone boundary in meters

1 = distance from one end of the path to the Fresnel zone boundary (in kilometers)

2 = distance from the other end of the path to the Fresnel zone

boundary (in kilometers)

D = total path distance (d1+d2) in kilometers

ƒ = frequency in GHz

n = Fresnel zone, 1 (for 1st) is used here

Theoretical Signal Strength

where:

RSSI= signal strength at the receiver in dBm

EIRP = RF power output in dBm + Gta –Ltfl



fs = free-space path loss in dB

ra = receive antenna gain in dBi

rfl = receive feedline loss in dB

tfl = transmit feedline loss in dB

ta = transmit antenna gain in dBi

Probability of System Fading

where:

FProb = probability of fading more than F

= terrain factor

• 4 is used for very smooth terrain, such as over water

• 1 is used for average terrain, with moderate roughness

• 0.25 is used for mountainous or very rough terrain

b = climate factor

• 0.5 is used for a hot, humid climate

• 0.25 is used for temperate or northern areas

• 0.125 is used for a very dry climate

ƒ = frequency in GHz

d = path length in km

F = fade margin in dB

fs 92.4 20 10 flog 20 10dlog++=

nd1d2



--------------------

17.3

EIRP 

–

fs Gra Lrfl

–

FProb a b 6.0 10 7

–

310 F

–



10



=

90 MDS Master Station MDS 05-6399A01, Rev. D

8.2 dBm-Volts-Watts Conversion Chart

The dBm-Volts-Watts Conversion Chart below is provided as a convenience for determining the equiva-

lent voltage or wattage of an RF power expressed in dBm.

Table 8-1 dBm–Volts–Watts Conversion Chart

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 05-6399A01, Rev. D MDS Master Station 91

9 GLOSSARY OF TERMS & ABBREVIATIONS

If you are new to wireless data systems, some of the terms in this guide may be unfamiliar. The following

glossary explains many of these terms and can prove helpful in understanding the operation of the Master

Station. While some entries may not appear specifically in the text of this manual, they are included to

promote a more complete understanding of wireless data networks, both of current and legacy design.

Active Messaging—This is a mode of diagnostic gathering that may interrupt payload system polling

communications (contrast with passive messaging). Active (or intrusive) messaging is faster than passive

messaging because it is not dependent upon the RTU polling cycle.

Antenna System Gain—A figure, normally expressed in dB, representing the power increase resulting

from the use of a gain-type antenna. System losses (from the feedline and coaxial connectors, for exam-

ple) are subtracted from this figure to calculate the total antenna system gain.

BER—Bit Error Rate.

Bit—The smallest unit of digital data, often represented by a one or a zero. Eight bits (plus start, stop, and

parity bits) usually comprise a byte.

Bits-per-second—See BPS.

BPS—Bits-per-second. A measure of the information transfer rate of digital data across a communication

channel.

Bridging—(see Ethernet Bridging).

Byte—A string of digital data usually made up of eight data bits and start, stop and parity bits.

Ckeyed—Pertains to continuously keyed Master stations (full-duplex).

CLI—Command Line Interface. A method of user control where commands are entered as character

strings to set configuration and operating parameters.

CTS—Clear to Send.

Decibel (dB)—A measure computed from the ratio between two signal levels. Frequently used to express

the gain (or loss) of a system.

Data Circuit-terminating Equipment—See DCE.

Data Communications Equipment—See DCE.

Data Terminal Equipment—See DTE.

dBi—Decibels referenced to an “ideal” isotropic radiator in free space. Frequently used to express anten-

na gain.

dBm—Decibels referenced to one milliwatt. An absolute unit used to measure signal power, as in trans-

mitter power output, or received signal strength.

DCE—Data Circuit-terminating Equipment (or Data Communications Equipment). In data communica-

tions terminology, this is the “modem” side of a computer-to-modem connection. The transceiver de-

scribed in this manual is hardwired as a DCE device.

Digital Signal Processing—See DSP.

92 MDS Master Station MDS 05-6399A01, Rev. D

DLINK—Data Link Mode. This is a GE MDS-proprietary protocol used when the transceiver is in diag-

nostics mode.

DSP—Digital Signal Processing. The transceiver’s DSP is the core operating unit of the transceiver

through which nearly all functions depend.

DTE—Data Terminal Equipment. A device that provides data in the form of digital signals at its output.

Connects to the DCE device.

ETH—Abbreviation for Ethernet.

Ethernet Bridging—A mode of operation for the transceiver where the radio decides whether messages

are handled locally or sent intact over-the-air.

Fade Margin—The greatest tolerable reduction in average received signal strength expected under most

conditions. Provides an allowance for reduced signal strength due to multipath fading, slight antenna

movement or changing atmospheric losses. A fade margin of 20 to 30 dB is usually sufficient in most

systems.

FPGA—Field Programmable Gate Array.

Frame—A segment of data that adheres to a specific data protocol and contains definite start and end

points. It provides a method of synchronizing transmissions.

Gate—An operating mode of the transceiver with respect to diagnostic/management activities. See also

NODE, PEER, and ROOT.

Hardware Flow Control—A transceiver feature used to prevent data buffer overruns when handling

high-speed data from the RTU or PLC. When the buffer approaches overflow, the radio drops the

clear-to-send (CTS) line, which instructs the RTU or PLC to delay further transmission until CTS again

returns to the high state.

Host Computer—The computer installed at the master unit, which controls the collection of data from

one or more remote sites.

I/O—Input/Output.

IP—Internet Protocol.

Intrusive Diagnostics—A mode of remote diagnostics that queries and commands radios in a network

with an impact on the delivery of the system “payload” data. See Active messaging.

LAN—Local Area Network.

LED—Light Emitting Diode.

Latency—The delay (usually expressed in milliseconds) between when data is applied to the TXD pin at

one radio, until it appears at the RXD pin of another radio.

Listen Before Transmit—A collision avoidance mechanism that attempts to allow transmission only

when the channel is clear.

mA—Milliamperes (current flow). 1000 mA = 1 Ampere.

MAC—Media Access Control.

NIC: Network Interface Card. This is another name for the modules that are selectively included in the

product based on order entry.

MDS 05-6399A01, Rev. D MDS Master Station 93

NX915: A GE MDS NIC module supporting unlicensed operation at 900 MHz

MAS—Multiple Address System. A radio system where a central master unit communicates with several

remote stations for the purpose of gathering telemetry data.

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

the network.

Multiple Address System—See MAS.

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

radio network.

Node—An operating mode of the transceiver with respect to diagnostic/management activities. See also

GATE, PEER, and ROOT.

Non-intrusive diagnostics—See Passive messaging.

OTA—Over-the-Air.

PA—Power Amplifier.

Packet Radio—A transmission scheme in which data elements are assembled into units, that are consec-

utively numbered and error-checked at the time of transmittal. Errored packets result in retry requests

from the receiving station.

Passive messaging—This is a mode of diagnostic gathering or reprogramming that does not interrupt

payload system polling communications. Diagnostic/reprogramming data is sent/collected non-intrusively

over a period of time; polling messages are carried with payload system data (contrast with active mes-

saging).

Payload data—This is the application’s communication data which is sent over the radio network.

Peer—An operating mode of the transceiver with respect to diagnostic/management activities. See also

GATE, NODE, and ROOT.

Point-Multipoint System—A radio communications network or system designed with a central control

station that exchanges data with a number of remote locations equipped with terminal equipment.

Poll—A request for data issued from the host computer (or master PLC) to a remote radio.

PLC—Programmable Logic Controller. A dedicated microprocessor configured for a specific application

with discrete inputs and outputs. It can serve as a host or as an RTU.

PPM—Parts per Million. Typically used to specify a tolerance rating for an operational parameter.

Programmable Logic Controller—See PLC.

Remote (Station)—A radio in a network that communicates with an associated master unit.

Remote Terminal Unit—See RTU.

Redundant Operation—A station arrangement where two transceivers and two power supplies are

available for operation, with automatic switch-over in case of a failure.

Root—An operating mode of the transceiver with respect to diagnostic/management activities. See also

GATE, NODE, and PEER.

RTS—Request-to-send.

94 MDS Master Station MDS 05-6399A01, Rev. D

RTU—Remote Terminal Unit. A data collection device installed at a remote radio site. An internal RTU

simulator is provided with the transceiver to isolate faults to either the external RTU or the radio.

RX—Abbreviation for “Receive.” See also TX.

SAF—Store and Forward. An available feature of the radio where data is stored by a designated Remote,

and then retransmitted to a station beyond the communication range of the AP.

Signal-to-Noise Ratio—See SNR.

SCADA—Supervisory Control And Data Acquisition. An overall term for the functions commonly pro-

vided through an MAS radio system.

SCEP (Simple Certificate Enrollment Protocol): A scalable protocol for networks based on digital cer-

tificates, which can be requested by users without the need for assistance or manual intervention from a

system administrator.

SNR—Signal-to-Noise ratio. A measure of how well a signal is being received relative to noise on the

radio channel.

SSH: Secure Shell protocol for a network that allows users to open a window on a local PC and connect

to a remote PC as if they were present at the remote.

SSID (Service Set Identifier): A name that identifies a particular 802.11wireless LAN.

Standing Wave Ratio—See SWR.

Supervisory Control And Data Acquisition—See SCADA.

SWR—Standing Wave Ratio. A parameter related to the ratio between forward transmitter power and the

reflected power from the antenna system. As a general guideline, reflected power should not exceed 10%

of the forward power ( 2:1 SWR maximum).

Telnet—A terminal emulation protocol that enables an Internet user to communicate with a remote de-

vice for management activities as if it were locally connected to a PC.

Terminal Server—An available feature on the radio which encapsulates serial data from the

COM1/COM2 ports, and sends it over the air as IP packets. The data is decapsulated at the receiving end

and routed to the appropriate COM ports.

Transparent Mode—A mode in which payload data remains unchanged from its original format when it

is sent over the air. A radio in this mode is said to be “transparent” to connected equipment at each end of

a link.

TX—Abbreviation for “Transmit.” See also RX.

VLAN—Virtual Local Area Network

WAN—Wide Area Network

x710—The generic name for GE MDS legacy transceiver-family products, including the MDS 9710 (900

MHz), MDS 4710 (400 MHz), 2710 (200 MHz) and MDS 1710 (100 MHz).

MDS 05-6399A01, Rev. D MDS Master Station 95

IN CASE OF DIFFICULTY...

Our products are designed for long life and trouble-free operation. However, this equipment, as with all

electronic equipment, may have an occasional component failure. The following information will assist

you in the event that servicing becomes necessary.

TECHNICAL ASSISTANCE

Technical assistance for GE MDS products is available from our Technical Support Department during

normal business hours (8:30 A.M.–6:00 P.M. Eastern Time). When calling, please give the complete

model number of the product, along with a description of the trouble/symptom(s) that you are experienc-

ing. In many cases, problems can be resolved over the telephone, without the need for returning the unit

to the factory. Please use one of the following means for product assistance:

Phone: 585 241-5510 E-Mail: gemds.techsupport@ge.com

FAX: 585 242-8369 Web: www.gemds.com

REPAIR SERVICE

Component level repair of this equipment is not recommended in the field. Many components are in-

stalled using surface mount technology, which requires specialized training and equipment for proper ser-

vicing. 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 unit to its proper operating specifications.

If return of the equipment is necessary, you must obtain a return authorization number before shipment.

This number helps expedite the repair so that the equipment can be returned to you as quickly as possible.

Please be sure to include the number on the outside of the shipping box, and on any correspondence re-

lating to the repair. No equipment will be accepted for repair without an authorization number.

Return authorization numbers are issued online at www.gedigitalenergy.com/Communications.htm. On

the left side of the page, click “Login to my MDS” and once logged in, click “Service Request Order”.

Your number will be issued immediately after the required information is entered. Please be sure to have

the model number(s), serial number(s), detailed reason for return, “ship to” address, “bill to” address, and

contact name, phone number, and fax number available when requesting a number. A purchase order

number or pre-payment will be required for any units that are out of warranty, or for product conversion.

If you prefer, you may contact our Product Services department to obtain an authorization number:

Telephone Number: 585-241-5540

Fax Number: 585-242-8400

E-mail Address: gemds.productservices@ge.com

The radio must be properly packed for return to the factory. The original shipping container and packag-

ing materials should be used whenever possible. All factory returns should be addressed to:

GE MDS, LLC

Product Services Department

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. To in-

quire about an in-process repair, you may contact our Product Services department using the telephone,

Fax, or E-mail information given above.

96 MDS Master Station MDS 05-6399A01, Rev. D

REPLACEMENT PARTS

Many spare and replacement items are available for purchase by contacting your factory sales representa-

tive, or by visiting our online store at http://store.gedigitalenergy.com/front.asp.

GE MDS DS-SDM4 MDS SDM4 Licensed Spectrum Module User Manual

GE MDS LLC MDS SDM4 Licensed Spectrum Module Users Manual

Users Manual

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