GE MDS LEDR400S LEDR Microwave Radio User Manual 3627A LEDR S body

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1. Exhibit 22 LEDR 400S Users Manual
2. LEDR 400S Users Manual Addendum

Exhibit 22 LEDR 400S Users Manual

Installation and Operation Guide

MDS 05-3627A01, Rev. A

MARCH 2000

Digital Microwave Radio

LEDR Subrate Series

Covers LEDR 400S, 900S and 1400S

(plus optional fractional interface)

QUICK START GUIDE

Below are the basic steps for installing the LEDR radio. When making cable connections, refer

to page 10 for a rear panel view of the radio.

1. Install and connect the antenna system to the radio

• Ensure a path study has been conducted and that the radio path is acceptable.

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

• Preset directional antennas in the direction of desired transmission/reception.

2. Connect the data equipment to appropriate rear panel connector

• For standard “S” Series radios, see Figure 25.

• For radios equipped with an FT1 Option Board, see Figure 26.

• Verify the data equipment is conﬁgured as DTE. (By default, the radio is conﬁgured as DCE.)

3. Apply DC power to the radio

• Verify that the voltage matches the power supply operating range (24 Vdc or 48 Vdc).

• The power connector is a three-pin keyed connector. The power source can be connected with

either polarity. The center conductor is

not

connected.

4. Set the radio’s basic conﬁguration using front panel or Console interface

• You must ﬁrst login with a valid username and password (see page 16).

• Set the transmit/receive frequencies (

TX xxx.xxxx

RX xxx.xxxx

• Refer to this manual for other conﬁguration settings.

5. Verify proper operation by observing the LED display

• Refer to “LEDs” on page 19 for a description of the status LEDs.

• Aim directional antenna for maximum receive signal strength using the

RSSI

Screen.

6. Conﬁgure the Simple Network Management Protocol (SNMP) MIB, if used

• Refer to the SNMP Handbook (Part No. 05-3532A01).

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide i

TABLE OF CONTENTS

1.0 INTRODUCTION ......................................................................... 1

1.1 Product Description ..........................................................................1

LEDR Features...............................................................................1

Typical Applications........................................................................2

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

2.0 INSTALLATION............................................................................ 4

2.1 General Requirements .....................................................................4

Site Selection .................................................................................5

Terrain and Signal Strength............................................................5

On-the-Air Test ...............................................................................6

A Word About Interference .............................................................6

2.2 Antenna and Feedline Selection ......................................................7

Antennas ........................................................................................7

Feedlines........................................................................................8

2.3 Radio Mounting ................................................................................9

Attaching the Rack Brackets ........................................................10

2.4 Radio Rear Panel Connectors .......................................................10

Ground Stud.................................................................................11

Antenna/TX ..................................................................................11

RX ................................................................................................11

G.703 Data Connectors (4)—For radios with FT1 Option Bd.......11

Ethernet........................................................................................11

EIA-530-A.....................................................................................12

Service Channel...........................................................................12

Alarm I/O ......................................................................................12

Power ...........................................................................................12

2.5 Protected Switch Rear Panel Connectors ......................................12

RxA...............................................................................................13

RxB...............................................................................................13

Antenna........................................................................................13

TxA...............................................................................................13

TxB...............................................................................................13

Protected Data .............................................................................13

E1.................................................................................................13

Ethernet........................................................................................14

530 (A&B).....................................................................................14

EIA-530-A.....................................................................................14

Service Channel...........................................................................14

2.6 Inter-Unit Cabling for Protected Stations ........................................14

3.0 OPERATION.............................................................................. 15

ii LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

3.1 Initial Startup ..................................................................................15

Maximizing RSSI..........................................................................16

Initial Login—Required to change radio settings..........................16

3.2 Communicating with the Radio ......................................................18

Front Panel Controls.....................................................................18

Front Panel Menu Tree .................................................................20

3.3 Front Panel LCD Menu Descriptions ..............................................24

Default Parameters.......................................................................24

Network ........................................................................................24

General.........................................................................................25

RF Conﬁguration ..........................................................................26

IO Conﬁguration ...........................................................................27

Line Conﬁguration ........................................................................28

Performance.................................................................................30

G.821............................................................................................31

Modem .........................................................................................32

Console ........................................................................................32

Diagnostics...................................................................................33

Orderwire......................................................................................33

Front Panel ...................................................................................33

Redundant....................................................................................34

Remote Status..............................................................................35

3.4 Console Port .................................................................................35

Using the Console Port ................................................................36

Command Descriptions................................................................39

3.5 SNMP Network Management .........................................................59

3.6 Using the Orderwire .......................................................................60

3.7 Bandwidths, Data Rates and Modulation Types .............................61

3.8 Transmit Clock Selection ................................................................62

3.9 Protected (1+1) LEDR Radio .........................................................64

Protected Operation .....................................................................64

Space Diversity Operation............................................................66

User Interface & Control...............................................................67

3.10 Fractional T1 Interface Card (Optional Equipment) ......................67

Fractional T1 Performance ...........................................................67

4.0 RADIO EVENT CODES............................................................. 68

5.0 FIELD REPROGRAMMING....................................................... 76

5.1 Reprogramming via the Console Port ............................................76

Set Up ..........................................................................................76

Download Procedure....................................................................76

Veriﬁcation and Reboot ................................................................76

5.2 Reprogramming via a Network Connection ...................................77

Set Up ..........................................................................................77

Download Procedure....................................................................77

Veriﬁcation and Reboot ................................................................78

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide iii

6.0 FIELD REPLACEABLE UNITS.................................................. 78

6.1 Field Installation of FT1 Option Board

Non-protected: 03-3846A01

Protected: 03-3539A01 ..........................................................................78

7.0 TECHNICAL REFERENCE ....................................................... 82

7.1 Speciﬁcations .................................................................................82

7.2 Pinout Information ..........................................................................84

Orderwire......................................................................................84

Console ........................................................................................85

Ethernet........................................................................................85

EIA-530-A Data ............................................................................85

G.703 Data Connectors (4 on rear panel)....................................86

Service Channel...........................................................................86

Alarm............................................................................................86

7.3 RF Propagation Planning ...............................................................87

Fresnel Zone Clearance...............................................................87

Earth Curvature............................................................................88

Fade Margins ...............................................................................88

Free Space Path Loss..................................................................89

Parabolic Antenna Gain ...............................................................89

Fresnel Zone Boundary................................................................89

Parabolic Antenna Beamwidth .....................................................89

Theoretical Signal Strength..........................................................90

Probability of System Fading........................................................90

7.4 Bench Testing of Radios .................................................................90

7.5 Watts dBm Volts conversion ...........................................................92

This Installation and Operation Guide and all software described herein

are protected by

Adaptive Broadband Corporation,

Adaptive Broadband Corporation reserves its right to correct any errors

and omissions.

Operational Safety Notice

The radio equipment described in this guide emits radio frequency

energy. Although the power level is low, the concentrated energy from

a directional antenna may pose a health hazard. Do not allow people to

come in close proximity to the front of the antenna when the transmitter

is operating.

This manual is intended to guide a professional installer to install,

operate and perform basic system maintenance on the described radio.

RF Exposure

iv LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Distress Beacon Warning

The 406 to 406.1 MHz band is reserved for use by distress beacons.

Since the LEDR 400S radio is capable of transmitting in this band, take

precautions to prevent the radio from operating between 406 and 406.1

MHz.

Notice

While every reasonable effort has been made to ensure the accuracy of

this manual, product improvements may result in minor differences

between the manual and the product shipped to you. If you have addi-

tional questions or need an exact specification for a product, please con-

tact our Customer Service Team using the information at the back of this

guide. Updated documentation may also be available on our web site at

www.microwavedata.com.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 1

1.0 INTRODUCTION

This manual is intended to help an experienced technician install, con-

figure, and operate a LEDR 400S, 900S or 1400S digital radio. It begins

with an overall description of radio features and is followed by the steps

required to mount a LEDR radio and place it into normal operation.

After installation, we suggest keeping this guide near the radio for future

reference.

1.1 Product Description

The LEDR radio (Figure 1) is a full duplex, point-to-point digital unit

operating in the 330-512 MHz frequency band (model 400S), 800-960

(model 900S) or 1350–1535 MHz frequency band (model 1400S) with

bandwidths ranging from 25 kHz to 200 kHz, depending on the radio

model and installed options. The LEDR radio is designed to connect to

industry-standard EIA-530 data interface equipment.

With the addition of a fractional T1 card option, the radio can be con-

nected to industry-standard G.703 T1 data interface equipment. See

page 67 for a complete description of the fractional T1 option.

The radio is also available as a protected “1+1” version (Figure 2) con-

sisting of two identical LEDR radios and a Protected Switch Chassis.

The protected version is designed to perform automatic switchover to a

second radio in the event of a failure in the primary unit. See page 64 for

detailed information on the protected version.

LEDR Features

• 64, 128, 256, 384, 512 and 768 kbps data rates

• n x 64 kbps data rates for units with an FT1 Option Board

• Network Management via SNMP version 1

• Protected operation (1+1) compatible

• 1.0 watt transmit power

• Rack space efficient (1RU) size

• Rugged, reliable design

• Voice Orderwire (DTMF compliant)

• Data service channel

2 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Invisible place holder

Figure 1. The LEDR Digital Radio (Non-Protected Version)

Invisible place holder

Figure 2. LEDR Digital Radio (Protected Version)

Typical Applications

• Point-to-point transmission applications

• Cost effective, “thin route” applications

• Long haul telecommunications links

• Cellular backhaul

• Last mile links

• Trunked radio links

• SCADA systems

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 3

1.2 Model Number Codes

The radio model number is printed on the serial number tag, which is

affixed to the chassis. Figure 3, Figure 4 and Figure 5 show the signifi-

cance of the model number string on the various LEDR “S” models.

Contact the factory for specific information on optional configurations.

Invisible place holder

Figure 3. Model Number Codes (LEDR 400S)

Invisible place holder

Figure 4. Model Number Codes (LEDR 900S)

MODEL NUMBER

CODES ARE SUBJECT

TO CHANGE.

DO NOT USE FOR

PRODUCT ORDERING. 400S

MODES

DUPLEXER SEP.

INPUT POWER

1= 24 Vdc

BANDWIDTH

E= 500 kHz

SPLITTER

PROTECTED STBY

2= Non-protected Fractional E1/T1 N= None

A= Asymmetric 1dB/10 dB

1= Internal (300-400 MHz)

2= 48 Vdc

F= 1 MHz

G= 2 MHz

N= None

REGULATORY

N= Not applicable

E= ETS 300630/

5= 1+1 Fractional E1/T1

8= Space Diversity E1/T1

2= Internal-(400-512 MHz)

S= Symmetric 3dB

W= Warm

H= Hot

ETS 300385/MPT1717

3= Int.-Space Div. (300-400 MHz)

4= Int.-Space Div. (400-512 MHz)

900S

MODES

N= Non-protected (EIA-530)

DUPLEXER SEP.

INPUT POWER

1= 24 Vdc

BANDWIDTH

A= 25 kHz

RECEIVE FREQ.

TRANSMIT FREQ.

TRANSMIT

NMS SUPPORT

S= Standard

1= Non-protected (G.703)

2= Protected (EIA-530)

3= Protected (G.703)

2= 860-900 MHz

1= 800-860 MHz

N= None (external)

1= 9 MHz

2= 48 Vdc

3= 900-960 MHz

B= 50 kHz

C= 100 kHz

D= 200 kHz

2= 860-900 MHz

1= 800-860 MHz

3= 900-960 MHz

H= High

L= Low

1= SNMP

REGULATORY

N= Not applicable

A= FCC/IC/CSA

4 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Invisible place holder

Figure 5. Model Number Codes (LEDR 1400S)

2.0 INSTALLATION

Installation of the LEDR transceiver is not difficult, but it does require

some planning to ensure optimal efficiency and reliability. This section

provides tips for selecting an appropriate site, choosing antennas and

feedlines, and minimizing the chance of interference. This material

should be reviewed before beginning equipment installation.

2.1 General Requirements

There are four main requirements for installing the transceiver—a suit-

able installation environment, adequate and stable primary power, a

good antenna system, and the correct interface between the transceiver

and the external data equipment. Figure 6 shows a typical station

arrangement.

Invisible place holder

Figure 6. Typical Station Arrangement

1400S

MODES

DUPLEXER SEP.

INPUT POWER

1= 24 Vdc

BANDWIDTH

E= 500 kHz

SPLITTER

PROTECTED STBY

2= Non-protected Fractional E1/T1 N= None

A= Asymmetric 1dB/10 dB

N= None (Optional Ext.)

2= 48 Vdc

F= 1 MHz

G= 2 MHz

N= None

REGULATORY

N= Not applicable

E= ETS 300630/

5= 1+1 Fractional E1/T1

8= Space Diversity E1/T1

R= None (Wired for Ext.) Redun.

S= Symmetric 3dB

W= Warm

H= Hot

ETS 300385/MPT1717

1= Internal

2= Internal-Space Diversity

GRID DISH

ANTENNA

LOW LOSS

COAXIAL CABLE

TO DC

POWER SOURCE

(24 or 48 Vdc as appropriate)

DATA INTERFACE

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 5

Site Selection

For a successful installation, careful thought must be given to selecting

proper sites for the radios and antenna systems. Suitable sites should

offer:

• An antenna location that provides an unobstructed path in the

direction of the associated station

• A source of adequate and stable primary power

• Suitable entrances for antenna, interface or other required

cabling

• Adequate clearance around the radio for ventilation

These requirements can be quickly determined in most cases. A possible

exception is the first item—verifying that an unobstructed transmission

path exists. Microwave radio signals travel primarily by line-of-sight,

and obstructions between the sending and receiving stations will affect

system performance. This is especially important for the LEDR 1400S,

which operates in the 1400 MHz microwave frequency band.

If you are not familiar with the effects of terrain and other obstructions

on radio transmission, the following discussion will provide helpful

background.

Terrain and Signal Strength

A line-of-sight path between stations is highly desirable, and provides

the most reliable communications link in all cases. A line-of-sight path

can often be achieved by mounting each station antenna on a tower or

other elevated structure that raises it to a level sufficient to clear sur-

rounding terrain and other obstructions.

The requirement for a clear transmission path depends upon the distance

to be covered by the system. If the system is to cover only a limited dis-

tance, say 5 km (3.1 miles), then some obstructions in the transmission

path may be tolerable. For longer-range systems, any obstruction could

compromise the performance of the system, or block transmission

entirely.

The signal strength at the receiver must exceed the receiver sensitivity

by an amount known as the fade margin to provide reliable operation

under various conditions.

Detailed information on path planning should be reviewed before begin-

ning an installation. See RF Propagation Planning on page 87 for more

information. Computer software is also available for this purpose that

can greatly simplify the steps involved in planning a path.

6 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Adaptive Broadband/MDS offers path analysis (for paths in the USA)

as an engineering service. Contact the factory for additional informa-

tion.

On-the-Air Test

If you’ve analyzed the proposed transmission path and feel that it is

acceptable, an on-the-air test of the equipment and path should be con-

ducted. This not only verifies the path study results, but allows you to

see firsthand the factors involved at each installation site.

The test can be performed by installing a radio at each end of the pro-

posed link and checking the Received Signal Strength Indication (RSSI)

value reported at the front panel LCD screen of each radio. If adequate

signal strength cannot be obtained, it may be necessary to mount the sta-

tion antennas higher, use higher gain antennas, or select a different site

for one or both stations.

A Word About Interference

Interference is possible in any radio system. However, since the LEDR

radio is designed for use in a licensed system, interference is less likely

because frequency allocations are normally coordinated with consider-

ation given to geographic location and existing operating frequencies.

The risk of interference can be further reduced through prudent system

design and configuration. Allow adequate separation between frequen-

cies and radio systems.

C/I Curves

A carrier to interference (C/I) curve can help in frequency and space

coordination. The information in this curve can aid greatly in helping

plan geographic locations and frequency usage for radio systems. Con-

tact the factory for additional information on carrier to interference

curves. A whitepaper on the subject is available on request. Ask for Pub-

lication No. 05-3638A01.

Keep the following points in mind when setting up your point-to-point

system:

1. Systems installed in lightly populated areas are least likely to

encounter interference; those in urban and suburban environments

are more likely to be affected by other devices operating in the

radio’s frequency band and adjacent services.

2. Directional antennas must be used at each end of a point-to-point

link. They conﬁne the transmission and reception pattern to a com-

paratively narrow beam, which minimizes interference to and from

stations located outside the pattern. The larger the antenna, the more

focused the transmission and reception pattern and the higher the

gain.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 7

3. If interference is suspected from another system, it may be helpful

to use antenna polarization that is opposite to the interfering sys-

tem’s antennas. An additional 20 dB (or more) of attenuation to

interference can be achieved by using opposite antenna polarization.

Refer to the antenna manufacturer’s instructions for details on

changing polarization.

2.2 Antenna and Feedline Selection

Antennas

The antenna system is perhaps the most crucial part of the system

design. An antenna system that uses poor quality feedline, or is improp-

erly aligned with the companion site, will result in poor performance, or

no communication at all.

A directional antenna must be used for point-to-point systems to mini-

mize interference both to and from nearby systems. In general, cylin-

drical or dish type antennas with a parabolic reflector must be used. Yagi

or corner reflector types may be acceptable in some applications. Check

government regulations.

The exact style of antenna used depends on the size and layout of a

system. In most cases, a directional “dish” type of antenna is used with

the radio (Figure 7). Dish antennas maximize transmission efficiency

and restrict the radiation pattern to the desired transmission path.

Invisible place holder

Figure 7. Typical Grid Dish Antenna

8 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Table 1, Table 2 and Table 3 list some common grid dish antenna sizes

and their approximate gains.

Adaptive Broadband Corporation/MDS can also furnish antennas for

use with the transceiver. Consult your sales representative for details.

Feedlines

For maximum performance, a good quality feedline must be used to

connect the transceiver to the antenna. For short-range transmission, or

where very short lengths of cable are used (up to 8 meters/26 feet), an

inexpensive coax cable such as Type RG-213 may be acceptable.

Table 1. Dish antenna size vs. gain at 400 MHz

Antenna Size

Meters (feet) Approximate

Gain (dBi)

1.2 meters

(4 feet) 13.1

2.0 meters

(6 feet) 16.3

3.0 meters

(10 feet) 19.6

4.0 meters

(12 feet) 22.2

Table 2. Dish antenna size vs. gain at 900 MHz

Antenna Size

Meters (feet) Approximate

Gain (dBi)

1.2 meters

(4 feet) 18.4

2.0 meters

(6 feet) 22

3.0 meters

(10 feet) 26.4

4.0 meters

(12 feet) 28

Table 3. Dish antenna size vs. gain at 1400 MHz

Antenna Size

Meters (feet) Approximate

Gain (dBi)

1.2 meters

(4 feet) 23.7

2.0 meters

(6 feet) 26.1

3.0 meters

(10 feet) 30.6

4.0 meters

(12 feet) 32.1

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 9

For longer cable runs, or for longer-range communication paths, we rec-

ommend using a low-loss cable suited for 1400 MHz, such as Andrew

Heliax

. Whichever type of cable is used, it should be kept as short as

possible to minimize signal loss.

Table 4, Table 5 and Table 6 list several types of acceptable feedlines

and the associated losses according to operating frequency.

Table 6 lists several types of acceptable feedlines and the associated

losses at 1400 MHz.

2.3 Radio Mounting

The radio can be mounted either in a 19-inch equipment rack or on a

table top. It should be located in a relatively clean, dust-free environ-

ment that allows easy access to the rear panel connectors as well as front

panel controls and indicators. Air must be allowed to pass freely over the

ventilation holes and heat sink on the side panel.

Table 4. Feedline Loss Table (450 MHz)

Cable Type 3.05 Meters

(10 Feet) 15.24 Meters

(50 Feet) 30.48 Meters

(100 Feet) 152.4 Meters

(500 Feet)

RG-8A/U 0.51 dB 2.53 dB 5.07 dB 25.35 dB

1/2 in. HELIAX 0.12 dB 0.76 dB 1.51 dB 7.55 dB

7/8 in. HELIAX 0.08 dB 0.42 dB 0.83 dB 4.15 dB

1-1/4 in. HELIAX 0.06 dB 0.31 dB 0.62 dB 3.10 dB

1-5/8 in. HELIAX 0.05 dB 0.26 dB 0.52 dB 2.60 dB

Table 5. Feedline Loss Table (960 MHz)

Cable Type 3.05 Meters

(10 Feet) 15.24 Meters

(50 Feet) 30.48 Meters

(100 Feet) 152.4 Meters

(500 Feet)

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

1/2 in. HELIAX 0.23 dB 1.15 dB 2.29 dB 11.45 dB

7/8 in. HELIAX 0.13 dB 0.64 dB 1.28 dB 6.40 dB

1-1/4 in. HELIAX 0.10 dB 0.48 dB 0.95 dB 4.75 dB

1-5/8 in. HELIAX 0.08 dB 0.40 dB 0.80 dB 4.00 dB

Table 6. Feedline Loss Table (1400 MHz)

Cable Type 8 Meters

(26 Feet) 15 Meters

(49 Feet) 30 Meters

(98 Feet) 61 Meters

(200 Feet)

RG-213 3.0 dB 6.03 dB 12.05 dB 24.1 dB

1/2 in. HELIAX 0.73 dB 1.47 dB 2.93 dB 5.9 dB

7/8 in. HELIAX 0.42 dB 0.83 dB 1.66 dB 3.32 dB

1-5/8 in. HELIAX 0.26 dB 0.26 dB 1.05 dB 2.1 dB

10 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

The dimensions of the LEDR radio are:

• 305 mm (12 in) deep

• 426 mm (16.75 in) wide—excluding rack brackets

• 45 mm (1.75 in) high—1RU

Attaching the Rack Brackets

The radio is normally shipped with the rack brackets uninstalled. To

attach them, select the desired mounting position on the sides of the

chassis. (The brackets may be mounted flush with the front panel, or

near the middle of the chassis.)

Both short and long screws are provided with the brackets. Use the long

screws for the heatsink (left) side of the chassis and the short screws for

the right side of the chassis. Tighten the screws securely.

2.4 Radio Rear Panel Connectors

The rear panel of the standard LEDR “S” Series radio is shown in

Figure 8. Figure 9 shows the rear panel of a radio equipped with an FT1

Option Board. Refer to the descriptions that follow for specific informa-

tion regarding rear panel connections.

Invisible place holder

Figure 8. LEDR “S” Series Rear Panel (Standard)

Antenna/TX

External Duplexer

Power Plug

Detail (see text)

GROUND STUD

COOLING FAN

EXPANSION DATA

DATA CONNECTOR

ETHERNET

SERVICE CHANNEL

ALARM INPUT & OUTPUT

DC POWER

RF CONNECTORS

Note: RX Connector present with external duplexer only.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 11

Invisible place holder

Figure 9. LEDR “S” Series Rear Panel (With FT1 Option Board)

Ground Stud

The ground stud on the rear panel provides a point to tie the radio’s

chassis ground to earth ground for safety purposes.

Antenna/TX

The Antenna/TX connector is a coaxial N-type connector. When an

internal duplexer is installed, it serves as the connection point for the sta-

tion antenna. When an external duplexer is used, it acts as the transmitter

RF output connector to the duplexer.

The RX (receive) connector is a coaxial N-type connector. It is only

installed if the radio is supplied for use with an external duplexer. It car-

ries receive signals from the duplexer to the transceiver.

When an external duplexer is used, ensure that the higher frequency

(transmit or receive) is connected to the duplexer connector marked

and the lower frequency (transmit or receive) is connected to the

duplexer marked

G.703 Data Connectors (4)

—For radios with FT1 Option Bd.

These RJ-45 jacks provide connection to G.703 customer-supplied data

interface equipment. Only one of the jacks is active (user selectable in

software). For pinout information, see Figure 26 on page 86.

Ethernet

The Ethernet connector provides access to the embedded SNMP agent

and other elements of the TCP/IP network-management interface. The

connector is a standard 10 base-T connection with an RJ-45 modular

connector.

Antenna/TX

External Duplexer

RX G.703/Expansion Data EIA-530-A

Ethernet

NMS

Data Interface

Service

Channel Alarm I/O DC Power Input

Power Plug

Detail (see text)

GROUND STUD

COOLING FAN

4 x G.703 DATA CONNECTORS

EIA-530 DATA CONNECTOR

ETHERNET

SERVICE CHANNEL

ALARM INPUT & OUTPUT

DC POWER

RF CONNECTORS

Note: RX Connector present with external duplexer only.

(Not Operational with FT1 board installed)

(Non-Protected version)

12 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

At a repeater site, the Ethernet connector must be connected to the other

radio with a cross-cable for the Orderwire and service channel to func-

tion properly.

For detailed pin information see, Figure 24 on page 85.

EIA-530-A

The EIA-530-A connector is the main data input/output connector for

the subrate radio. The EIA-530 interface is a high-speed serial data con-

nector. For detailed pin information, see “EIA-530-A Data” on page 85.

Service Channel

This is a 9-pin serial port with EIA-232-type signaling. For detailed pin

information, see “Service Channel” on page 86.

Alarm I/O

This is a 9-pin connector that has both inputs and outputs. The events

that cause alarm output signals can be configured in the radio software.

See “evmap” on page 43 for information on programing which events

trigger an alarm. See Figure 28 on page 86 for Alarm I/O pinout infor-

mation.

Power

Before connecting primary power to the radio, verify that it matches the

power supply operating range. Improper voltages may damage the

equipment. The allowable voltage limits are shown in Table 7. The

power connector is not polarity-sensitive.

The DC power connector is a three-pin keyed connector. The power

supply used can be connected with either polarity. The center conductor

is not connected.

Refer to the model number codes in Figure 3 to determine the radio’s

power supply range.

2.5 Protected Switch Rear Panel Connectors

The rear panel of the Protected Switch Chassis is shown in Figure 10.

Refer to the following descriptions for specific information regarding

rear panel connections.

Table 7. Power Supply Options

Nominal Input Voltage Allowable Voltage Range

24 Vdc 19.2 to 28.8 Vdc

48 Vdc 38.4 to 57.6 Vdc

CAUTION

POSSIBLE

EQUIPMENT

DAMAGE

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 13

Figure 11 presents an inter-unit cabling diagram for protected configu-

rations.

Invisible place holder

Figure 10. Protected Switch Chassis—Rear Panel

RxA

The RxA (receive, radio A) connector is a coaxial N-type connector. It

connects to the RX port on the rear panel of Radio A via a short coaxial

cable.

RxB

Same as RxA, but for Radio B.

Antenna

The Antenna connector is a coaxial N-type connector. It serves as the

connection point for the station antenna.

TxA

The TxA (transmit, radio A) connector is a coaxial N-type connector. It

connects to the TX port on the rear panel of Radio A via a short coaxial

cable.

TxB

Same as TxA, but for Radio B.

Protected Data

This pair of connectors accepts G.703 data signals from each of the

LEDR radios. The top connector is for Radio A, and the bottom con-

nector is for Radio B. For pinout information, see Figure 26 on page 86.

These connectors are not operational on “S” Series (Subrate) radios.

TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1Protected

ETHERNET

SERVICE CHANNEL

RF CONNECTORS E1 DATA

PROTECTED DATA 530 (A&B)

EIA-530-A

14 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Ethernet

The Ethernet connector provides access to the embedded SNMP agent

and other elements of the TCP/IP network-management interface. The

connector is a standard 10 base-T connection with an RJ-45 modular

connector. For detailed pin information, Figure 24 on page 85.

530 (A&B)

This pair of DB-25 connectors accepts EIA-530 signals from each of the

LEDR radios. The top connector is for Radio A, and the bottom con-

nector is for Radio B. For pinout information, see Figure 26 on page 86.

EIA-530-A

This DB-25 connector provides a connection point for customer-sup-

plied EIA-530 data equipment.

Service Channel

In a protected configuration, this DB-9 connector becomes the Service

Channel connection for both LEDR radios. (The Service Channel con-

nectors on the radios become non-functional.) For detailed pin informa-

tion, see “Service Channel” on page 86.

2.6 Inter-Unit Cabling for Protected Stations

The required cabling between the two radios and the Protected Switch

chassis is shown in Figure 11.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 15

Invisible place holder

Figure 11. Inter-unit Cabling—Protected Version

3.0 OPERATION

The LEDR radio is designed for continuous, unattended operation.

Under normal conditions, the only time operator intervention is required

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

This section explains the use of the radio’s controls and indicators and

provides steps for initial startup of the equipment.

3.1 Initial Startup

NOTE: The LEDR radio is normally keyed continuously, and the radio

will transmit whenever power is applied. Ensure there is a suit-

able load on the antenna connector before connecting power.

Operation of the radio can be started by simply connecting primary

power to the unit. After a short self-test, a “default screen” similar to the

following appears on the radio’s LCD display:

TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1Protected

External Data Interface

EIA-530-A

Ethernet

NMS

Service

Channel Alarm I/O DC Power Input

EIA-530-A

Ethernet

NMS

Data Interface

Service

Channel Alarm I/O DC Power Input

STATION

ANTENNA

NOT USED WITH

FT1-EQUIPPED RADIOS

TO ETHERNET HUB

TO EIA-530

DATA EQUIPMENT

SERVICE CHANNEL

(SERVES BOTH RADIOS)

COAXIAL CABLES (4)

P/N 19-1323A02 RIBBON CABLE

P/N 03-3828A01

SCSI CABLE

P/N 03-3837A01

External

G.703/Expansion Data

NOT USED IN

PROTECTED CONFIG.

NOT USED IN

PROTECTED CONFIG.

RADIO A

RADIO B

PROTECTED SWITCH

RIBBON CABLE

P/N 03-3828A01

SCSI CABLE

P/N 03-3837A01

LLEE

EEDD

DDRR

LLii

iinn

nnkk

RRSS

SSSS

SSII

II::

--66

6600

ddBB

BBmm

16 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Maximizing RSSI

For newly installed systems, one of the first tasks is to orient the station

antenna for a maximum Received Signal Strength Indication (RSSI) as

shown on the LCD screen. See “Performance” on page 30 for details. A

maximum RSSI ensures the antenna is properly aimed at the associated

station. Move the antenna slowly while an assistant observes the RSSI

display for a maximum reading.

Initial Login—Required to change radio settings

When the radio is first powered up, it defaults to a read-only condition.

That is, the radio parameters may be viewed, but cannot be changed. To

enable changes to radio settings, a valid user name and password must

be entered.

When the radio is shipped from the factory, it is pre-programmed with

the following temporary login credentials:

Username: SUPER

Password: SUPER

Keypad Method To log in from the front panel using the temporary credentials, follow

these steps:

1. Go to the Login screen and press the front panel key. The

Username screen appears with SUPER displayed.

2. Press the key again to access the Password screen. Use the

arrow keys to scroll through the list of characters and individually

select the letters spelling out the word SUPER. Press after each

character selection. (For more information on character selection

using the keypad, see “Communicating with the Radio” on page 18.)

3. When all of the characters have been entered, press again. The

screen brieﬂy displays Login Success and returns to the Login entry

screen.

The user may now access any of the screens shown in Figure 14 with

Administrator level privileges (the highest allowable user level).

Console Method To login using a terminal connected to the front panel console port,

follow the steps below. (For more information on connecting a terminal,

see “Console Port” on page 35.)

1. Connect a terminal to the radio’s front panel console port and

press . The

ADAP> prompt will appear.

2. Enter login SUPER. The Password > prompt will appear.

ENTER

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 17

3. Enter the password SUPER. The following response appears: login:

SUPER logged in.

The user may now access any of the console commands listed in

Table 12 on page 36 with Administrator level privileges (the highest

allowable user level).

Changing the

SUPER Password

(Recommended)

The factory-programmed username and password (SUPER) is provided

to enable a System Administrator to operate a newly installed radio. It

is highly recommended that the password for SUPER be changed as soon

as possible to maintain system security.

Follow these steps to change the factory-programmed password:

1. Login as SUPER using the Console Method described above.

(Passwords cannot be changed using the front panel keypad.)

2. Enter the command passwd. At the next prompt, enter a new pass-

word (eight characters maximum).

3. Re-enter your new password (for veriﬁcation purposes). If the entry

is correct, the radio responds with user: Command Complete.

You may now set up additional accounts, set permission levels, or delete

accounts as desired using the user command. See page 58 for complete

description of this command.

NOTE: It is recommended that users log out when finished using the

keypad or console terminal. This can be done using the Logout

screen on the radio, or the logout command from a console

terminal as appropriate. If there is no keypad or terminal

activity for 10 minutes, the radio automatically logs out and

reverts to read-only status.

18 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

3.2 Communicating with the Radio

There are four different methods available to set radio parameters and

query the radio.

•Front Panel—The front panel is intended to serve as a conve-

nient user interface for local radio management. Most, but not

all, parameters and functions are accessible from the front

panel.

•SNMP Network Management System—The SNMP agent

interface is optimized to fulfill the fault configuration, perfor-

mance and user access requirements of the LEDR radio system.

A separate guide, P/N 05-3532A01 explains SNMP in more

detail.

• Telnet—A standard network application protocol which pro-

vides a console-type interface to configure and query most radio

parameters.

• EMS (Element Management System)—The EMS is used via

a terminal connected to the front panel console port. It may be

used to configure and query every manageable radio parameter

on a given network using the out-of-band service channel. The

EMS may be used on the local radio (login command) or on the

remote radio (rlogin command).

Front Panel Controls

Figure 12 shows the LEDR radio’s front panel controls and indicators.

The front panel includes LEDs, an LCD display screen and a menu nav-

igation keypad.

Figure 12. Front Panel Interface

MENU NAVIGATION BUTTONS

ALARM STATUS LEDS

STATUS LEDS LCD DISPLAY

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 19

LEDs The front panel LEDs indicate the following conditions when lit:

POWER—Main Power is applied to radio.

ACTIVE—This is the Primary unit in a redundant configuration.

ALARM—A general alarm condition is present

RX ALARM—The modem is not locked to a receive signal

TX ALARM—There is a problem with the transmitter

I/O ALARM—There is a payload data interface error

LCD Display/Keypad The LCD display provides a 2 line by 16 character readout of radio

status and parameter settings. It is used with the menu navigation

keypad on the right side of the front panel to control the radio’s opera-

tion and access diagnostic information.

Use of the keypad (Figure 13) is simple, and allows many basic oper-

ating tasks to be performed without connecting an external terminal or

using additional software.

Invisible place holder

Figure 13. Menu Navigation Keypad

The keypad buttons can be used for two functions; Navigation, and

Editing. The functions of the keys are automatically selected according

to the screen that is being viewed by the user.

•Navigation Mode—This is the default mode. The left and right

keys ( ) navigate through the available top level screens (see

menu tree, Figure 14). The key allows entry into a screen,

exposing another level of menus or entering edit mode for a radio

parameter. The key always exits the current screen, causing

the program to “pop out” one level.

•Edit Mode—In editable screens, pressing the key puts the

screen in Edit mode. The technique for applying new data depends

on the particular edit mode used by that screen. LEDR screens have

four edit sub-modes; List, Character edit, Text Entry, and Horizon-

tal Bar.

ENTER

20 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

In List mode, the left and right keys scroll through a list of

choices. Pressing when the desired choice is selected

attempts to apply the changes. Pressing drops out of the

edit mode without saving changes.

The Character Edit mode consists a cursor move mode and a

character scroll mode. Upon entering the Character Edit mode,

the left and right keys move the cursor in the corresponding

direction. When the cursor is below the character to change,

pressing again puts the screen in character scroll mode in

which the left and right keys scroll through the available charac-

ters. Pressing saves the new character and reverts to cursor

move mode. To save all changes made in cursor move mode,

place the cursor under the special “Enter” character and press

. Pressing in character scroll mode reverts to cursor

move mode. Pressing in cursor move mode cancels char-

acter edit mode without saving any changes.

The Text Entry mode is a slight modification to the Character

Edit mode above. Upon entering Text Entry mode the cursor is

in the leftmost position and the keys scroll through the

available characters. Pressing saves the current character

and moves the cursor to the next position to the right. When the

text is correctly entered, moving the cursor to the special “Enter”

character and pressing attempts to save the new text.

Pressing in cursor move mode cancels Text Entry mode

without saving any changes.

The Horizontal Bar mode is used in some menu screens. It

allows adjustment of the LCD display for the best contrast using

the keys (see Front Panel menu, page 33). The right key

corresponds to upward viewing angle; the left key corresponds

to downward viewing angle. Pressing saves the adjusted

value as the default setting.

It works in a similar manner for the Orderwire menu (see page

33) to adjust the Volume and VOX threshold.

Front Panel Menu Tree

The LEDR radio contains several top level menus (see Table 8). These

serve as entry points to a variety of sub menus that can be used to view

or adjust operating parameters and diagnose the radio link.

ENTER

Table 8. Top Level Menu Screens

1) Login/Logout 9) Modem

2) Network 10) Console

3) General 11) Diagnostics

4) RF Configuration 12) Orderwire

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 21

Figure 14 on the following page shows a pictorial view of the front panel

menu tree. Detailed explanations of the screens are given in Section 3.3,

Front Panel LCD Menu Descriptions (beginning on page 24).

5) IO Configuration 13) Front Panel

6) Line Configuration 14) Redundant

7) Performance 15) Remote Status

8) G.821

Table 8. Top Level Menu Screens (Continued)

22 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Invisible place holder

Figure 14. Front Panel LCD Menu Navigation

UUss

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ddmm

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6600

ddBB

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AAvv

vvaa

aaii

iill

llaa

aabb

bbll

llee

EErr

rrrr

rroo

oorr

rree

eedd

ssee

eecc

UUnn

nncc

ccoo

oorr

rrrr

rree

eecc

cctt

ttaa

aabb

bbll

llee

bbll

lloo

oocc

cckk

kkss

CCoo

oorr

rrrr

rree

eecc

cctt

ttee

eedd

bbyy

yytt

ttee

eess

BBaa

aauu

uudd

RRaa

aatt

ttee

9966

6600

0000

PPaa

aarr

rrii

iitt

ttyy

NNoo

oonn

nnee

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LLoo

oocc

cckk

LLOO

OOCC

CCKK

KKEE

EEDD

LLoo

oooo

oopp

ppbb

bbaa

aacc

cckk

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RRMM

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((

((NN

NNOO

OONN

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))

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lltt

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sstt

SStt

ttaa

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nndd

OODD

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llee

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rrtt

4400

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BBaa

aacc

cckk

kkll

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gghh

hhtt

EENN

NNAA

AABB

BBLL

LLEE

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VVii

iiee

eeww

wwii

iinn

nngg

AAnn

nngg

ggll

llee

~~~~

KKee

eeyy

yypp

ppaa

aadd

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eeee

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NNAA

AABB

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LLEE

EEDD

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eepp

ppee

eeaa

aatt

RRaa

aatt

ttee

1155

5500

mmss

Details Page 24

Details Page 25

Details Page 30

Details Page 31

Details Page 32

Details Page 33

LLEE

EEDD

DDRR

LLii

iinn

nnkk

DDee

eeff

ffaa

aauu

uull

lltt

SScc

ccrr

rree

eeee

eenn

LLEE

EEDD

DDRR

LLii

iinn

nnkk

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oogg

ggii

iinn

LLEE

EEDD

DDRR

LLii

iinn

nnkk

NNee

eett

ttww

wwoo

oorr

rrkk

LLEE

EEDD

DDRR

LLii

iinn

nnkk

GGee

eenn

nnee

eerr

rraa

aall

LLEE

EEDD

DDRR

LLii

iinn

nnkk

RRFF

CCoo

oonn

nnff

ffii

iigg

LLEE

EEDD

DDRR

LLii

iinn

nnkk

PPee

eerr

rrff

ffoo

oorr

rrmm

mmaa

aann

nncc

ccee

LLEE

EEDD

DDRR

LLii

iinn

nnkk

GG..

..88

8822

2211

LLEE

EEDD

DDRR

LLii

iinn

nnkk

CCoo

oonn

nnss

ssoo

ooll

llee

LLEE

EEDD

DDRR

LLii

iinn

nnkk

MMoo

oodd

ddee

eemm

LLEE

EEDD

DDRR

LLii

iinn

nnkk

DDii

iiaa

aagg

ggnn

nnoo

ooss

sstt

ttii

iicc

ccss

LLEE

EEDD

DDRR

LLii

iinn

nnkk

OOrr

rrdd

ddee

eerr

rrww

wwii

iirr

rree

LLEE

EEDD

DDRR

LLii

iinn

nnkk

FFrr

rroo

oonn

nntt

PPaa

aann

nnee

eell

ENTER Step 2

Step 3

Display Only

Display Only Display Only

Display Only

Menu Selections Menu Selections

Menu Selections

Number Enter Number Enter Number Enter

Text Enter

Menu Selection

Number Enter Number Enter

Display Only

Display OnlySet/Display

Number Enter

Display Only

Menu Selection

Menu Selection Menu Selection

Menu Selection

Step 1

RRxx

FFrr

rree

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qquu

uuee

eenn

nncc

ccyy

xxxx

xx..

..xx

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MMHH

HHzz

TTxx

xxKK

KKee

eeyy

EEnn

nnaa

aabb

bbll

llee

UUNN

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--KK

KKEE

EEYY

YYEE

EEDD

Display Only Display Only

VVoo

ooll

lluu

uumm

mmee

~~~~

VVoo

ooxx

TThh

hhrr

rree

eess

sshh

hhoo

ooll

lldd

~~~~

Level Setting Level Setting

Angle Setting

GG..

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8822

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ttaa

aatt

ttuu

uuss

EERR

RRRR

RROO

OORR

FFRR

RREE

EEEE

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aavv

vvaa

aaii

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llaa

aabb

bbll

llee

ssee

eecc

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rree

eeqq

qq..

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ffff

ffss

ssee

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--11

1177

7700

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lltt

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PPoo

oorr

rrtt

0000

00..

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0000

00..

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0000

00..

..00

0000

Number Enter

Details Page 24

LLEE

EEDD

DDRR

LLii

iinn

nnkk

LLoo

oogg

ggoo

oouu

uutt

Number Enter

Display Only

(Note: Logout screens available only when logged in.)

SSii

iibb

bbll

llii

iinn

nngg

SStt

ttaa

aatt

ttuu

uuss

OOKK

AAcc

cctt

ttii

iivv

vvee

NNOO

Details Page 34

LLEE

EEDD

DDRR

LLii

iinn

nnkk

RRee

eedd

dduu

uunn

nndd

ddaa

aann

nntt

Display Only Display Only

Display Only

RRee

eemm

mmoo

oott

ttee

UUnn

nnii

iitt

ttII

IIDD

<<nn

nnoo

oonn

nnee

ee>>

>> Numeric Entry

Details Page 27

LLEE

EEDD

DDRR

LLii

iinn

nnkk

IIOO

CCoo

oonn

nnff

ffii

iigg

Details Page 28

LLEE

EEDD

DDRR

LLii

iinn

nnkk

LLii

iinn

nnee

CCoo

oonn

nnff

ffii

iigg

Details Page 35

LLEE

EEDD

DDRR

LLii

iinn

nnkk

RRee

eemm

mmoo

oott

ttee

SStt

ttaa

aatt

ttuu

uuss

Details Page 26

CCll

lloo

oocc

cckk

MMoo

oodd

ddee

IINN

NNTT

TTEE

EERR

RRNN

NNAA

AALL

Menu Selection (see note)

IInn

nntt

ttee

eerr

rrff

ffaa

aacc

ccee

EE11

Menu Selection

FFDD

DDLL

EEnn

nnaa

aabb

bbll

llee

DDII

IISS

SSAA

AABB

BBLL

LLEE

EEDD

Menu Selection

CCAA

AASS

EEnn

nnaa

aabb

bbll

llee

DDII

IISS

SSAA

AABB

BBLL

LLEE

EEDD

Menu Selection

CChh

hhoo

oooo

ooss

ssee

LLii

iinn

nnee

LLII

IINN

NNEE

EE11

Menu Selection

FFrr

rraa

aamm

mmee

SStt

ttrr

rruu

uucc

cctt

FFAA

AASS

OONN

NNLL

LLYY

Menu Selection

AAII

IISS

GGee

eenn

nnee

eerr

rraa

aatt

ttee

OOFF

FFFF

AAII

IISS

FFoo

oorr

rrww

wwaa

aarr

rrdd

ddii

iinn

nngg

OOFF

FFFF

Menu SelectionMenu Selection

Note: This menu tree shows the selections available on radios equipped with an FT1 Option Board.

Standard “S” Series radios will have fewer selections.

MMoo

oodd

ddee

HHOO

OOTT

MMyy

SStt

ttaa

aatt

ttuu

uuss

OOKK

Menu Selection

LLEE

EEDD

DDRR

LLii

iinn

nnkk

LLoo

oogg

gggg

ggee

eedd

oouu

uutt

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 23

Invisible place holder

HHaa

aarr

rrdd

ddww

wwaa

aarr

rree

RRee

eevv

vv..

xxxx

SSee

eevv

vvee

eerr

rree

eell

llyy

EErr

rrrr

rree

eedd

ssee

eecc

DDee

eeff

ffaa

aauu

uull

lltt

SScc

ccrr

rree

eeee

eenn

RRSS

SSSS

SSII

Display Only

Menu Selection

Display Only

Display Only—This description indicates the LCD menu item is for

informational purposes only.

Menu Selection—This description indicates there are selections

available and the choices may be scrolled through using the

buttons. Press the button again to save menu selection

choice.

Text or Number Enter— This description indicates the entry is

alphanumeric. The buttons are first used to position the

cursor over the text to be changed. Then, the button is

pressed to enter the edit mode. Use the buttons to scroll

through all available characters. Press the button again to

save the displayed character in displayed location.

ENTER

RREE

EESS

SSEE

EETT

GG..

..88

8822

2211

11??

NNOO

Menu Selection

MMoo

oodd

dd//

//DD

DDaa

aatt

ttaa

rraa

aatt

ttee

3322

22--

--QQ

QQAA

AAMM

7766

6688

kkbb

bbpp

ppss

BBii

iitt

EErr

rrrr

rroo

oorr

RRaa

aatt

ttee

1100

00--

--66

LLii

iinn

nnee

mmaa

aapp

11aa

22bb

33cc

44dd

Menu Selection

LLii

iinn

nnee

CCoo

oodd

ddee

AAMM

MMII

Menu Selection

RRee

eeff

ffrr

rraa

aamm

mmee

ccoo

oonn

nnss

ss..

FFAA

AASS

Menu Selection

PPuu

uull

llss

ssee

SShh

hhaa

aapp

ppee

gg..

..77

7777

7755

Menu Selection

CCaa

aabb

bbll

llee

LLee

eenn

nngg

ggtt

tthh

11--

--11

1133

3333

fftt

Menu Selection

(Note: Redundant screens visible

only on protected/redundant

stations)

HHii

iitt

ttll

llee

eess

ssss

OONN

DDee

eeff

ffaa

aauu

uull

lltt

RRaa

aadd

ddii

iioo

YYee

eess

SSii

iibb

bbll

llii

iinn

nngg

IIPP

0000

00..

..00

0000

00..

..00

0000

00..

..00

0000

SSww

wwii

iitt

ttcc

cchh

XXcc

ccvv

vvrr

SSww

wwii

iitt

ttcc

cchh

hh??

Numeric Entry Menu Selection Menu Selection Menu Selection

(Note: Redundant screens

visible only on protected/

redundant stations)

(Note: Earlier versions of the software may display the Clock Mode as

NORMAL

instead of

INTERNAL

24 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

3.3 Front Panel LCD Menu Descriptions

Default Parameters

This menu allows you to view the default screen that appears on the

LCD display. If desired, the default screen may be changed (see

“

Default Screen

” on page 34).

The login menus allow you to log in to the radio’s operating system and

gain access to configuration and diagnostics functions permitted for

your assigned access level.

The username menu is where you specify the user name assigned by the

user access administrator.

The password screen is where you specify the password associated with

your user name to gain access to the login account. A maximum of eight

characters are allowed.

Network

This menu allows changes to the radio’s IP address. The IP address is

used for SNMP connectivity. The IP address also allows new radio soft-

ware to be downloaded over-the-air.

This menu allows the subnet mask to be viewed and changed. The

subnet mask specifies which bits of the host IP address can be re-used

for increased network addressing efficiency.

Example: Consider an IP address in a Class C network, such as

150.215.017.009. The Class C network means that the right-most group

of numbers (009) identifies a particular host on this network. The other

three groups of numbers (150.215.017) represent the network address.

LLEE

EEDD

DDRR

LLii

iinn

nnkk

DDee

eeff

ffaa

aauu

uull

lltt

SScc

ccrr

rree

eeee

eenn

UUss

ssee

eerr

rrnn

nnaa

aamm

mmee

AAdd

ddmm

mmii

iinn

For the console

command-line equivalent,

see “login” on page 48

PPaa

aass

ssss

ssww

wwoo

oorr

rrdd

****

For the console

command-line equivalent,

see “passwd” on page 51

IIPP

AAdd

dddd

ddrr

rree

eess

ssss

0000

00..

..00

0000

00..

..00

0000

00..

..00

0000

For the console

command-line equivalent,

see “ip” on page 46

NNee

eett

ttmm

mmaa

aass

sskk

0000

00..

..00

0000

00..

..00

0000

00..

..00

0000

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 25

Subnetting allows the further division of the host part of the address

(right-most group of numbers) into two or more subnets. A subnet mask

of 255.255.255.127 allows half of the host portion of the IP address to

be reused to define sub-networks.

This menu allows the Gateway IP address to be viewed or set. The

Gateway IP address is the address of the radio that connects the radio

network to an IP network.

This menu allows selection of the Default IP port for networking con-

nections to the LEDR radio. The

Ethernet

selection is used for cable con-

nection to a Local Area Network (LAN) or repeater via the radio’s rear

panel

ETHERNET NMS

connector.

The

AIR

selection is commonly used for over-the air (RF) networking

between radios, but may also be used with a back-to-back cable connec-

tion between two radios via the radio’s rear panel

ETHERNET NMS

con-

nector. This type of communication uses the SNAP protocol and

requires the use of an ethernet crossover cable.

General

This menu allows the Unit ID of the radio to be displayed or changed.

The Unit ID allows an individual radio to be signaled for Orderwire use.

This menu displays the radio model number. The radio type cannot be

changed by the user.

For the console

command-line equivalent,

see “ip” on page 46

GGaa

aatt

ttee

eeww

wwaa

aayy

0000

00..

..00

0000

00..

..00

0000

00..

..00

0000

For the console

command-line equivalent,

see “ip” on page 46

DDee

eeff

ffaa

aauu

uull

lltt

IIPP

PPoo

oorr

rrtt

EEtt

tthh

hhee

eerr

rrnn

nnee

eett

For the console

command-line equivalent,

see “ip” on page 46

UUnn

nnii

iitt

IIDD

0000

For the console

command-line equivalent,

see “unitid” on page 58

MMoo

oodd

ddee

eell

NNuu

uumm

mmbb

bbee

eerr

LLEE

EEDD

DDRR

1144

4400

0000

00SS

SS For the console

command-line equivalent,

see “model” on page 51

26 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

This menu displays the radio serial number and matches the serial

number on the chassis sticker. The radio serial number cannot be

changed by the user.

This menu displays the firmware revision level of the internal radio soft-

ware.

This menu displays the hardware revision level of the main PC board in

the radio.

RF Configuration

This menu is used to set or view the transmit (TX) frequency of the

radio.

This menu is used to set or view the receive (RX) frequency of the radio.

This menu is used to enable (key) or disable (dekey) the transmitter or

to verify that the radio is keyed and the transmitter is active. The radio

is normally keyed and transmitting whenever power is applied.

This menu displays the bandwidth setting of the radio. The bandwidth is

set at the factory and cannot be changed by the user. Refer to Table 17

on page 61 for allowable combinations of bandwidth, data rates, and

modulation types.

SSee

eerr

rrii

iiaa

aall

NNuu

uumm

mmbb

bbee

eerr

xxxx

For the console

command-line equivalent,

see “sernum” on page 55

FFii

iirr

rrmm

mmww

wwaa

aarr

rree

RRee

eevv

vv..

xxxx

xx For the console

command-line equivalent,

see “ver” on page 59

HHaa

aarr

rrdd

ddww

wwaa

aarr

rree

RRee

eevv

vv..

xxxx

xx For the console

command-line equivalent,

see “ver” on page 59

TTxx

FFrr

rree

eeqq

qquu

uuee

eenn

nncc

ccyy

For the console

command-line equivalent,

see “freq” on page 44

RRxx

FFrr

rree

eeqq

qquu

uuee

eenn

nncc

ccyy

For the console

command-line equivalent,

see “freq” on page 44

TTxx

KKee

eeyy

EEnn

nnaa

aabb

bbll

llee

For the console

command-line equivalent,

see “txkey” on page 58

BBaa

aann

nndd

ddww

wwii

iidd

ddtt

tthh

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 27

This menu displays the modulation type and the aggregate link data rate.

The available modulation types are 16 QAM, 32 QAM, and 64 QAM.

The data rate can be changed, but is dependent on the modulation type.

See “Bandwidths, Data Rates and Modulation Types” on page 61.

IO Configuration

This screen is used to set or display the data clocking method. For syn-

chronization purposes, several different clocking schemes can be used.

See “Transmit Clock Selection” on page 62.

NOTE:

Earlier versions of the software may display the Clock Mode

NORMAL

instead of

INTERNAL

This screen is used to set or display the payload data interface. The

available selections are E1 and T1, depending on hardware configura-

tion of the LEDR radio.

This screen is used to set or display the Facility Data Link (FDL) status

for T1 operation. Valid selections are Enabled and Disabled.

This screen is used to set or displays the Channel Associated Signaling

(CAS) status. The available selections are Enabled and Disabled.

This screen is used to set or display the current span mapping configu-

ration. The entry consists of from 1 to 4 alpha-numeric characters spec-

ifying line interface to span mapping. Valid numbers are 1–4. Valid span

characters are a–d.

MMoo

oodd

dd//

//DD

DDaa

aatt

ttaa

rraa

aatt

ttee

3322

22--

--QQ

QQAA

AAMM

7766

6688

kkbb

bbpp

ppss

For the console

command-line equivalent,

see “modem” on page 51

CCll

lloo

oocc

cckk

MMoo

oodd

ddee

IINN

NNTT

TTEE

EERR

RRNN

NNAA

AALL

For the console

command-line equivalent,

see “clkmode” on page 42

IInn

nntt

ttee

eerr

rrff

ffaa

aacc

ccee

EE11

For the console

command-line equivalent,

see “interface” on page 46

FFDD

DDLL

EEnn

nnaa

aabb

bbll

llee

DDII

IISS

SSAA

AABB

BBLL

LLEE

EEDD

For the console

command-line equivalent,

see “modem” on page 51

CCAA

AASS

EEnn

nnaa

aabb

bbll

llee

DDII

IISS

SSAA

AABB

BBLL

LLEE

EEDD

For the console

command-line equivalent,

see “modem” on page 51

LLii

iinn

nnee

mmaa

aapp

11aa

22bb

33cc

44dd

28 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Example: Entering 1a 2b 3c 4d causes the following:

maps line 1 to span a

maps line 2 to span b

maps line 3 to span c

maps line 4 to span d

Line Configuration

This screen is used to choose or display the line (1-4) that is selected.

This selection will be active for all of the screens that follow in the Line

Configuration menu and will be displayed in the upper right hand corner

of each screen.

This screen is used to set or display the span(s) frame structure. The

allowable selections are shown in Table 9.

This screen is used to set or display the Alarm Indication Signal (AIS)

status. It may be set to ON or OFF. When generation is enabled, fault

conditions within the link or at the line interface will cause the appro-

priate AIS signaling to occur.

For the console

command-line equivalent,

see “linemap” on page 47

CChh

hhoo

oooo

ooss

ssee

LLii

iinn

nnee

LLII

IINN

NNEE

EE11

For the console

command-line equivalent,

see “linename” on page 48

FFrr

rraa

aamm

mmee

SStt

ttrr

rruu

uucc

cctt

FFAA

AASS

OONN

NNLL

LLYY

Table 9. Frame Structure—Allowable Selections

T1 Operation E1 Operation

0–FT only (Default) 0–FAS Only (Default)

1–ESF 1–FAS + BSLIP

2–ESF + PRM 2–FAS + CRC

3–SF 3–FAS + CRC + BSLIP

4–SF + JYEL 4–FAS + CAS

5–ESF + CRC 5–FAS + CAS + BSLIP

6–ESF + CRC + PRM 6–FAS + CRC + CAS

7–FAS +CRC + CAS +BSLIP

For the console

command-line equivalent,

see “fstruct” on page 44

AAII

IISS

GGee

eenn

nnee

eerr

rraa

aatt

ttee

OOFF

FFFF

For the console

command-line equivalent,

see “ais” on page 40

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 29

This screen is used to set or display the Alarm Indication Signal (AIS)

forwarding status. It may be set to ON or OFF. When forwarding is

enabled, AIS/RAI signaling at the line interfaces will be detected and

passed to the other end of the radio link.

This screen is used to set or display the linecode used by the radio. The

available selections are AMI or HDB3.

This screen is used to set or display the reframe criteria of the LEDR

radio. The setting is based on the number of errors encountered. The

available selections for T1 and E1 operation are listed in Table 10

below.

This command is used to select or display the pulse template according

to the data interface cable being used. Table 11 below shows the avail-

able selections for T1 and E1 operation.

AAII

IISS

FFoo

oorr

rrww

wwaa

aarr

rrdd

ddii

iinn

nngg

OOFF

FFFF

For the console

command-line equivalent,

see “ais” on page 40

LLii

iinn

nnee

CCoo

oodd

ddee

AAMM

MMII

For the console

command-line equivalent,

see “linecode” on page 47

RRee

eeff

ffrr

rraa

aamm

mmee

ccoo

oonn

nnss

ss..

FFAA

AASS

Table 10. Reframe Criteria Selections

T1 Operation E1 Operation

2 out of 4 Fbit errors (Default) 3 consecutive FAS errors (Default)

2 out of 5 Fbit errors 915 CRC errors

2 out of 6 Fbit errors

For the console

command-line equivalent,

see “reframe” on page 53

PPuu

uull

llss

ssee

SShh

hhaa

aapp

ppee

gg..

..77

7777

7755

Table 11. Line Selections vs. Cable Type

T1 Operation—100

Ω

Twisted Pair Cable E1 Operation

ITU-T G.703, 120

Ω

Cable

0–1 to 133 feet (Default) g.775 (Default)

1–133 to 266 feet i.431

2–266 to 399 feet

3–399 to 533 feet

4–533 to 655 feet

30 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

This command is used to set or display the cable length being used for

the data interface. The available selections are:

1 to 133 feet (Default)

133 to 266 feet

266 to 399 feet

399 to 533 feet

533 to 655 feet

Performance

The performance menu items provide diagnostics information regarding

the radio. The following diagnostic parameters are available on a con-

tinuous, updating basis:

•

RSSI—

Received Signal Strength Indicator

•

SNR—

Signal/Noise Ratio (not valid if there is an RX Alarm)

•

POUT—

Power Output

•

PA Temperature—

Power amplifier temperature

The RSSI display indicates the strength of the radio signal being

received at the radio receiver. The measurement is in dBm. Therefore,

an RSSI of –80 dBm is stronger than a –100 dBm signal.

The SNR display indicates the relationship of the amount of intelligence

versus noise on the radio signal. The higher the SNR, the better the

quality of the radio signal.

For the console

command-line equivalent,

see “line” on page 47

CCaa

aabb

bbll

llee

LLee

eenn

nngg

ggtt

tthh

11--

--11

1133

3333

fftt

For the console

command-line equivalent,

see “line” on page 47

RRSS

SSSS

SSII

--66

6600

ddBB

BBmm

For the console

command-line equivalent,

see “rssi” on page 54

SSNN

NNRR

++22

2277

ddBB

For the console

command-line equivalent,

see “snr” on page 55

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 31

The Power Output display indicates the transmitter power output in

dBm. (+30 dBm is equal to 1.0 watt; +20 dBm is 100 mW.)

The PA Temperature display indicates the internal temperature

(degrees Celsius) at the hottest point on the transceiver’s printed circuit

board (near the power amplifier section of the radio).

G.821

This menu contains radio link performance information. The G.821

standard defines descriptive words associated with bit-error rate perfor-

mance. Refer to the ITU-T G.821 recommendations for definitions and

standards.

This display shows summary information regarding the bit-error-rate

(BER) status of the radio.

This screen shows the available seconds of the radio link. The G.821

standard defines Available Seconds as the period of time following a

period of 10 consecutive seconds, each of which has a BER of less than

1x10

-3

This screen shows the unavailable seconds of the radio link. The G.821

standard defines Unavailable Seconds as the period of time following a

period of 10 consecutive seconds, each of which has a BER of higher

than 1x10

-3

This screen shows the errored seconds of the radio link. The G.821 stan-

dard defines Errored Seconds as a one second period in which one or

more bits are in error.

This screen shows the severely errored seconds of the radio link. The

G.821 standard defines Severely Errored Seconds as a one second

period that has a BER higher than 1x10

-3

This screen allows the user to reset the G.821 performance monitoring

screens.

PPoo

ooww

wwee

eerr

OOuu

uutt

++33

3300

ddBB

BBmm

For the console

command-line equivalent,

see “rfout” on page 54

PPAA

TTee

eemm

mmpp

ppee

eerr

rraa

aatt

ttuu

uurr

rree

++33

3377

°°

°°CC

For the console

command-line equivalent,

see “temp” on page 56

LLEE

EEDD

DDRR

LLii

iinn

nnkk

GG..

..88

8822

2211

GG..

..88

8822

2211

SStt

ttaa

aatt

ttuu

uuss

EErr

rrrr

rroo

oorr

FFrr

rree

eeee

AAvv

vvaa

aaii

iill

llaa

aabb

bbll

llee

ssee

eecc

UUnn

nnaa

aavv

vvaa

aaii

iill

llaa

aabb

bbll

llee

ssee

eecc

EErr

rrrr

rroo

oorr

rree

eedd

SSee

eevv

vvee

eerr

rree

eell

llyy

EErr

rrrr

rree

eedd

RRee

eess

ssee

eett

GG..

..88

8822

2211

11??

NNOO

32 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Modem

This menu indicates whether the receiver demodulator has detected a

signal, acquired the carrier, and data rate, as well as achieved a Forward

Error Correction (FEC) lock.

This screen shows the frequency offset of the LEDR radio as measured

in Hertz.

This menu shows how many frames have been corrected by the radio’s

FEC capability.

This menu shows how many bytes could

not

be corrected by the radio’s

FEC capability.

This menu shows the current bit error rate (BER) of the LEDR radio.

Console

This menu allows you to set or view the current data rate setting for the

console port serial interface. Refer to Figure 23 on page 85 for pinout

information of the console port. See “Console Port” on page 35 for addi-

tional information.

This menu allows you to set or view the current parity setting for the

console port serial interface. Refer to Figure 23 on page 85 for pinout

information for the console port. Refer to Console Port on page 35 for

additional information. Typically, this will be set to NONE.

RRxx

LLoo

oocc

cckk

LLOO

OOCC

CCKK

KKEE

EEDD

FFrr

rree

eeqq

qq..

OOff

ffff

ffss

ssee

eett

--11

1177

7700

HHzz

CCoo

oorr

rrrr

rree

eecc

cctt

ttee

eedd

bbyy

yytt

ttee

eess

UUnn

nncc

ccoo

oorr

rrrr

rree

eecc

cctt

ttaa

aabb

bbll

llee

bbll

lloo

oocc

cckk

kkss

BBii

iitt

EErr

rrrr

rroo

oorr

RRaa

aatt

ttee

1100

00--

--66

BBaa

aauu

uudd

RRaa

aatt

ttee

9966

6600

0000

For the console

command-line equivalent,

see “con” on page 41

PPaa

aarr

rrii

iitt

ttyy

NNoo

oonn

nnee

For the console

command-line equivalent,

see “con” on page 41

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 33

Diagnostics

This menu is used to start the loopback mode for testing purposes.

Remote loopback port selection is relative to the local port. The radio

link will translate any line mapping to select the correct physical remote

port to loop back, based on the selected local port.

When conducting RF loopback testing, see page 49 (loopback console

command) for additional information.

This menu is used to start built in radio tests to check radio function.

Orderwire

This menu allows you to “ring” the Orderwire at a specified radio site.

Refer to Using the Orderwire on page 60 for instructions on using the

Orderwire.

This screen is used to set or display the Orderwire volume. Use the

keys to adjust the screen. Pressing saves the adjusted value

as the default setting.

This screen is used to set or display the Orderwire vox threshold (acti-

vation level). Use the keys to adjust the screen. Pressing

saves the adjusted value as the default setting.

Front Panel

This screen provides control of the front panel LCD illumination. The

LCD illumination may need to be enabled to view the LCD depending

on ambient lighting conditions.

LLoo

oooo

oopp

ppbb

bbaa

aacc

cckk

NNOO

OORR

RRMM

MMAA

AALL

((

((NN

NNOO

OONN

NNEE

EE))

))

For the console

command-line equivalent,

see “loopback” on page 49

BBuu

uuii

iill

lltt

iinn

TTee

eess

sstt

SStt

ttaa

aarr

rrtt

tt??

?? For the console

command-line equivalent,

see “test” on page 56

SSee

eenn

nndd

OODD

DDWW

AAll

llee

eerr

rrtt

For the console

command-line equivalent,

see “alert” on page 40

VVoo

ooll

lluu

uumm

mmee

~~~~

ENTER

For the console

command-line equivalent,

see “volume” on page 59

VVoo

ooxx

TThh

hhrr

rree

eess

sshh

hhoo

ooll

lldd

~~~~

ENTER

For the console

command-line equivalent,

see “vox” on page 59

BBaa

aacc

cckk

kkll

llii

iigg

gghh

hhtt

EENN

NNAA

AABB

BBLL

LLEE

EEDD

34 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

This screen allows you to adjust the viewing angle (top to bottom) of the

LCD screen. The angle may need to be adjusted depending the mounting

position and ambient lighting conditions of the radio. Use the

keys to adjust the screen. Pressing saves the adjusted value as the

default setting.

This screen allows the radio beeper to be disabled or enabled. The

beeper provides a short “chirp” whenever a keypad button is pressed.

This screen allows you to set the time delay that occurs before a button

will start repeating its function when held down.

This screen allows you to set the default screen that appears when the

radio is first turned on, or is left idle for more than 10 minutes. The RSSI

screen is commonly chosen, but any screen may be selected as a default.

Redundant

This screen is used to display the status of the radio currently being used.

“OK” is displayed when no problems are detected.

This screen is used to display the status of the “other” radio in a pro-

tected configuration (the one not currently being used). “OK” is dis-

played when no problems are detected.

This screen is used to set or display whether the currently selected radio

is the active unit.

This screen is used to set or display the radio’s redundancy mode. The

available selections are: redundant hot standby (1+1 Hot), redundant

warm standby (1+1 Warm) or stand-alone configuration.

This screen is used to set or display the sibling radio’s Internet Protocol

(IP) address. (See note below.)

VVii

iiee

eeww

wwii

iinn

nngg

AAnn

nngg

ggll

llee

~~~~

ENTER

KKee

eeyy

yypp

ppaa

aadd

BBee

eeee

eepp

EENN

NNAA

AABB

BBLL

LLEE

EEDD

KKee

eeyy

RRee

eepp

ppee

eeaa

aatt

WWaa

aaii

iitt

1155

5500

mmss

DDee

eeff

ffaa

aauu

uull

lltt

SScc

ccrr

rree

eeee

eenn

RRSS

SSSS

SSII

MMyy

SStt

ttaa

aatt

ttuu

uuss

OOKK

SSii

iibb

bbll

llii

iinn

nngg

SStt

ttaa

aatt

ttuu

uuss

OOKK

AAcc

cctt

ttii

iivv

vvee

NNOO

MMoo

oodd

ddee

HHOO

OOTT

SSii

iibb

bbll

llii

iinn

nngg

IIPP

0000

00..

..00

0000

00..

..00

0000

00..

..00

0000

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 35

NOTE: The associated radio IP address should be programmed to the

IP address of the other radio connected to the protected

switching chassis. The associated radio IP address is used by

the redundant radio to share information between the units.

This address is necessary for warm-standby switching but not

for hot-standby. However, the redundant radio will perform

better if their associated radio IP address is programmed

correctly. The associated radio IP address does not affect IP

routing and forwarding, SNMP, or Telnet.

This screen sets or displays whether the radio is set to perform error-free

switchover in the event of an alarm condition.

This screen displays whether or not the radio is the default radio in a pro-

tected configuration. The default radio is determined by which one is

connected to the top connector of the Protected Switch Chassis rear

panel. (See Figure 11 on page 15.)

This screen is used to force a switchover to the non-active transceiver.

(The newly selected unit becomes the active transceiver).

Remote Status

This screen is used to set or display the unit identification for the remote

radio.

3.4 Console Port

The Console Port on the front panel provides full access to configuration

and diagnostics information.

The console port is an EIA-232 type connection that provides ASCII

text communications to a connected terminal. Refer to Pinout Informa-

tion on page 84 for connector wiring details.

Although the console interface is compatible with a VT-100-type ter-

minal, ANSI terminal emulation displays the menus with the best

results.

HHii

iitt

ttll

llee

eess

ssss

OONN

DDee

eeff

ffaa

aauu

uull

lltt

RRaa

aadd

ddii

iioo

YYee

eess

SSww

wwii

iitt

ttcc

cchh

XXcc

ccvv

vvrr

SSww

wwii

iitt

ttcc

cchh

hh??

RRee

eemm

mmoo

oott

ttee

UUnn

nnii

iitt

ttII

IIDD

<<nn

nnoo

oonn

nnee

ee>>

36 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

NOTE: It is important to use a terminal or terminal-emulator that

supports 80 characters per line and 25 lines per screen. The

menus will be distorted if terminals with different line charac-

teristics are used.

The command line can be used to configure and query the radio param-

eters and setup information. The available commands can be listed on

the display by typing help at the ADAP> prompt, then .

Using the Console Port

1. Connect a terminal to the front panel DB-9 connector labeled .

2. Open an ANSI terminal application on the terminal. (If using a win-

dows operating system, a HyperTerminal window can be used.)

3. Press a few times. When communications are established

with the radio, an ADAP> text prompt appears on the terminal screen.

4. Type login <your username> (or rlogin <your username> for remote

access) and press Enter. At the password> prompt, type your pass-

word (eight characters maximum).

Once you are successfully logged in, the commands shown in Table 12

are available at the command line prompt (ADAP>).

NOTE: The console commands listed in this manual show the selec-

tions available on radios equipped with an FT1 Option Board.

Standard “S” Series radios will have fewer selections.

ENTER

Table 12. Console Port Commands

Command Description Reference

?Displays the available console commands.

May also be entered after any other

command to obtain context sensitive help.

(Note: help may be entered in place of ?).

page 39

ais Echoes/enables/disables Alarm Indication

Signal (AIS) generation and Remote Alarm

Indication (RAI) detection, AIS and RAI

Signal (RAIS) forwarding on given span(s).

page 40

alarm Provides control of alarm outputs and

displays state of alarm inputs. page 40

alert Sends an alert sound to the specified radio page 40

ber Display pre-FEC and post-FEC bit error rate page 41

bert Provides a means to test the link between the

radio and the customer equipment. (Not

implemented at press time.)

boot Displays or reboots the board with either

software image page 41

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 37

buzzer Briefly sounds the radio’s piezo buzzer to test

its operation. page 41

coffset Displays modem carrier frequency offset in

Hz. page 41

con Set/display console parameters page 41

conﬁgUsed to get or send a radio configuration file. page 41

date Set/display current date page 41

dtren Set/display DTR enable page 42

clkmode Set/display transmit clocking mode page 42

ethernet Displays Ethernet address page 43

events Event log commands page 43

evmap Set/display alarm port and alarm LED

settings page 43

fan Displays fan status page 43

fec Display corrected and uncorrected FEC

errors page 43

freq Set/display operating frequencies page 44

fset Display absolute frequency limits page 44

fstruct Set/display current span(s) frame structure page 44

g821 Show/Reset G.821 information page 44

group Set/display network group page 44

help Displays the available console commands.

May also be entered after any other

command to obtain context sensitive help.

(Note: ? may be entered in place of help).

page 39

icopy Firmware image copy page 45

idlepat Set/display timeslot idle pattern page 45

info Set/display radio/owner information page 45

interface Echoes or sets the payload data interface page 46

interleave Set/display interleave depth page 46

ip Set/display the radio’s IP numbers page 46

iverify Firmware image verify page 46

lcd Tests radio’s front panel LCD display. page 46

led Tests radio’s front panel LEDs. page 46

line Set/display pulse shape settings page 47

linecode Set/display the linecode used by span(s) page 47

linerr Show/enable/clear line errors page 47

linemap Set/display current linemapping configuration page 47

linename Echoes or sets names for line interfaces page 48

log View, sort, clear, send event log information page 48

Table 12. Console Port Commands (Continued)

Command Description Reference

38 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

logout Console user exit page 49

loopback Set/display loopback modes page 49

menu Runs Menu Wizard page 51

model Display radio model number page 51

modem Set/display radio modulation type and data

rate page 51

network Display network numbers page 51

passwd Sets new user password (8 characters max.) page 51

pll Displays Phase Locked Loop status page 52

pmmode Enables/disables modem modulator power

measurement mode (on/off). page 52

rdnt Redundant command (Valid only on

Protected models) page 52

reframe Set/display the reframe criteria page 53

reprogram Reprograms radio software page 54

rfocal Set/display RF power output calibration

sequence. page 54

rfout Displays transmit power page 54

rlogin Log in to remote radio page 54

route Add/delete/modify IP routing table entries page 54

rssi Displays received signal strength page 54

rssical Set/display RSSI calibration sequence. page 54

rxlock Displays current modem lock status page 55

sabytes Echo/set sa bytes in E1 multi-frame page 55

sernum Displays radio serial number page 55

snmpcomm Set/display SNMP community names page 55

snr Displays signal to noise ratio page 55

status Displays performance and configuration data page 55

svch Set/display service channel configuration page 56

telnetd Displays or kills (terminates) telnet session(s) page 56

temp Displays PA temperature page 56

test Runs self-test of radio page 56

threshold Set/display performance degradation

threshold(s) page 57

time Set/display system time page 57

timeslot Selects which timeslots to transmit for a

span(s). Default action is to enable. page 57

trapﬁlter Set/display which events cause SNMP traps. page 58

trapmgr Set/display the trap manager IP address page 58

Table 12. Console Port Commands (Continued)

Command Description Reference

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 39

Command Descriptions

The following commands are available through the console port. The

conventions used for these commands are similar to UNIX com-

mand-line structure. These commands all require the Enter or Return

key be pressed after the command.

The following conventions are used to help describe the usage of the

commands.

Square brackets [ ] contain subcommands that may or may not be

needed as part of the desired command. If there is more than one

possible subcommand a vertical line | separates the commands

within the square brackets. A subcommand is an optional exten-

sion of the command and changes the basic command.

Angle brackets <> contain arguments. The arguments are values

needed to carry out the command such as a frequency value or

option.

? or help Usage: help

This command returns a list of currently available commands. In addi-

tion, entering help as a subcommand before or after a command returns

usage information regarding the command. A ? (question mark) can be

also be used to invoke help.

Command example:

rssi help

Returns:

Usage: command [subcommand] <argument>

trend Displays continuously updated readings of:

RSSI, radio temperature, RF output,

signal-to-noise ratio, and FEC errors (correc

ted and uncorrected).

page 58

txkey Key or unkey radio page 58

unitid Displays the unit identification page 58

uptime Displays how long the radio has been

operating page 58

user Administration tool for adding, modifying or

deleting user accounts page 58

ver Displays software version page 59

volume Set/display handset volume page 59

vox Set/display vox threshold page 59

who Displays the radio users list page 59

Table 12. Console Port Commands (Continued)

Command Description Reference

ENTER

40 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

ais Usage: ais [linelist] [-g <on|off>] [-f <on|off>]

This command enables or disables alarm signal generation and for-

warding on specified lines. When generation is enabled, fault conditions

within the link or at the line interface will cause the appropriate

AIS/RAI signaling to occur. When forwarding is enabled, AIS/RAI sig-

naling at the line interfaces will be detected and passed to the other end

of the link.

Command example:

ais -f on -g on

Returns:

AIS on RAI on

alarm Usage: alarm [1-4|all <open|close|read>]

[input [1-4|all]]

This command is used to control the alarm outputs and to display the

state of the alarm inputs.

Command example #1:

alarm all

Returns:

alarm: Starting test (all alarms)

alarm: Test complete (all alarms)

Command example #2:

alarm 2 close

Returns:

alarm: alarm 2 closed

Command example #3:

alarm input 3

Returns:

alarm: alarm input 3 = open

alert Usage: alert <3 digit unit ID>|all

This command is used to sound the alert buzzer on another radio station.

This function allows you to signal a radio and alert someone that the

handset for the Orderwire should be picked up.

ENTER

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 41

The three-digit number following the command indicates the unit ID of

the radio that will be signaled. See “Using the Orderwire” on page 60.

for more information.

ber Usage: ber

This command displays pre-FEC and post-FEC Bit Error Rate (BER).

Returns: ber 10-6

boot Usage: boot [<1-2>]

This command is used to view or change the radio’s active software

image. If boot is entered alone, the currently active image is displayed.

A selection of 1 or 2 after the command (e.g., boot 2) indicates which

software image to boot. (A message appears to confirm that you wish to

reboot the software.) Upon reboot, the radio software and all radio func-

tions are restarted in a manner similar to turning the radio power off and

then on again. The radio is taken out of service until it reinitializes.

A choice of software images allows booting an alternate version of radio

software. The ability to have two radio resident software images allows

radio software reprogramming over-the-air and the ability to restore

operation to the original software if required.

buzzer Usage: buzzer

This command briefly sounds the radio’s piezo buzzer for testing.

Example response:

buzzer: Starting test

buzzer: Test complete

coffset Usage: coffset

This command displays the Modem Carrier Frequency Offset.

con Usage: con (baud [300|1200|2400|4800|9600|19200|38400|115200]) (parity

[none|even|odd])

This command sets or displays the console serial port operating param-

eters. The console data rate is set or displayed using the baud subcom-

mand. The parity is set or displayed using the parity subcommand.

config Usage: conﬁg [get|send] [ﬁlename] [hostIP] [useCals

This command is used to get or send a radio configuration file.

42 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

clkmode Usage 1 (EIA-530 operation): clkmode [<internal|exttx|looped|extdce>]

Usage 2 (E1/T1 operation): clkmode [<internal|remote|1-4|linename>]

This command is used to set or display the master clock source for the

radio system. Several different clocking schemes can be used. See

“Transmit Clock Selection” on page 62 for clocking arrangements.

NOTE: Earlier versions of the software may display the Clock Mode

as NORMAL instead of INTERNAL.

Usage 1 Subcommands:

internal—Internal oscillator source (default).

exttx—Clock from external equipment.

looped—Recovered RF (RX) clock.

extdce—Some other source.

Usage 2 Subcommands:

internal—Internal oscillator source (default).

remote—Over-the-air, RX data derived.

1-4—Recovered RF (RX) clock.

linename—Loop timing from specified line interface.

In E1/T1 operation only, the clkmode command allows the various pos-

sible clock sources to be prioritized for fallback. As timing sources

become available, the highest-priority source will be chosen by the

system. If attaching to the network or equipment that provides timing, a

universal form of the command would be clkmode 1234 internal.

If attaching to equipment that will provide looped-back timing, a uni-

versal form of the command would be clkmode remote internal. If both

ends of the link provide looped-back timing, the internal clock source

should be selected by entering clkmode internal. Note that at least one end

of the link should have either network or internal timing selected.

date Usage: date [MM/DD/YYYY]

Subcommands: date format [<1-3>] (1-US, 2-European, 3-generic)

This command sets or displays the date and time of the radio’s internal

real-time clock. The real time clock operates from an internal lithium

battery so it is running even if the radio has no DC power connected. The

date format may also be set or displayed from this screen for one of three

formats: U.S., European, or generic.

The real time clock is fully compliant with year 2000 standards.

Example response: date: 07-JUN-1999 08:11:30

date format: dd-MON-yyyy (3)

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 43

dtren Usage: dtren [<on|off>]

The dtren command sets or displays the status of the DTR (handshaking)

enable.

Example response: dtren: on

ethernet Usage: ethernet

This command displays the fixed hardware address of the radio’s

Ethernet port. This number is assigned at the factory and cannot be

changed.

events Usage: events [subcommand] [<arguments>]

Subcommands: pending

ﬁlter [event#] [count]

init

desc [<event#>]

This command allows viewing the pending events (pending), setting the

number of occurrences per log entry (filter), initializing events pro-

cessing (init) and display of event descriptions (desc). To turn off log-

ging for a particular event, the filter count value should be set to zero.

Example response: events {events}: -DEMOD_ACQUISITION (Event #27)

events: Event#0 Filter count=1

events {init}: The event log has been re-initialized

events {desc}: Event#40 Description-

IO2_DIG_REM_LPBACK

evmap Usage: evmap [subcommand] [event #] [arguments]

Subcommands: led [ioalarm|txalarm|rxalarm|alarm|active] [...]

aout [1|2|3|4] [...]

dump

This command sets or displays which radio system events cause alarm

indications on the front panel LEDs or the rear panel ALARM I/O con-

nector. The subcommands specify which output will be asserted upon

occurrence of an event #. Multiple outputs can be specified with spaces

between them.

See Figure 12 for reference of the Front Panel LEDs. Refer to Alarm on

page 86 for the pinouts of the Alarm I/O connector.

Example response: evmap: Event #0 LED alarm

evmap: Event #0 Alarm Output NONE

fan Usage: [fan]

This command is used to read the status of the radio’s cooling fan.

Example response: fan1: Working

fan2: Working

fec Usage: [fec <clr>]

44 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

This command displays corrected and uncorrected FEC errors.

Example response: fec: 1812992 Correctable Bytes

fec: 6912 Uncorrectable Blocks

freq Usage: freq [<tx/rx>] [<freq>] [<freq>]

This command sets or displays the transmit and receive frequency.

Example response: freq {TxFreq}: 942175000 Hz

freq {RxFreq}: 944175000 Hz

fset Usage: fset [<min freq>] [<max freq>]

This command sets the absolute frequency limits of the LEDR radio.

Example response: fset {MinFreq}: 900000000

fset {MaxFreq}: 960000000

fstruct Usage: fstruct [linelist] [mode <0-7>]

This command is used to set or display the span(s) frame structure. The

[linelist] variable represents a list of line interfaces. This entry can be

either a single line number or linename (see linename command), a

comma separated list of line numbers or linenames, a range of line num-

bers (i.e., 1-4), or if linelist is not given all lines. Table 13 shows a list

of valid line numbers.

g821 Usage: demod|io1|io2|io3|io4|all[clr]

This command is used to show or reset the radio’s G.821 information.

Example Response: Demodulator: ERROR FREE

Savail: 1036

Sunavail: 0

ES: 0

SES: 0

group Usage: [<group>]

Table 13. T1/E1 Line Numbers

Mode for T1 Mode for E1

0–FT only (default) 0–FAS only (default)

1–ESF 1–FAS + BSLIP

2–ESF + PRM 2–FAS + CRC

3–SF 3–FAS + CRC + BSLIP

4–SF + JYEL 4–FAS + CAS

5–ESF + CRC 5–FAS + CAS + BSLIP

6–ESF + CRC +PRM 6–FAS + CRC + CAS

7–FAS + CRC + CAS + BSLIP

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 45

This command sets or displays the network group that the radio is oper-

ating in.

Example response: group: 1

help or ? Usage: help

This command can be used alone or with a specific command. Entering

help before or after a command will display the usage and possible sub-

commands of the command. The character ? may also be used to obtain

help.

icopy Usage: icopy [<app|dsp|fpga|scripts>]

This command is used to copy the active software image to the inactive

software image.

There are two independent radio operating software files residing in the

radio. The radio uses one of the files as the active software which is run-

ning. The other software file is inactive and is not running. The ability

to have two radio software images allows radio software reprogram-

ming to be done over-the-air and provides the ability to restore operation

to the original software if required.

To run the software image see “boot” on page 41.

idlepat Usage: idlepat [<linelist>] [slots <slotlist>] <pattern>

This command is used to set or display the timeslot(s) idle pattern.

variable definitions:

linelist: Represents a list of line interfaces. It can consist of a single line

number or linename, a comma separated list of line numbers or line-

names, a range of line numbers (i.e., 1–4), or if linelist is not given all

lines. See Table 13 on page 44 for a list of line numbers.

slotlist: A list of timeslots consisting of a single slot number, comma sep-

arated list of slot numbers, or a range of slot numbers (i.e., 2-8).

pattern: A 2 hex digit value (default value is 17).

info Usage: info [<owner|contact|name|location>] [<string>]

This command is used to program information into radio memory that

is particular to the radio site or installation. The information is intended

for identification and memorandum needs.

Four separate text fields are provided. The owner’s name string is lim-

ited to 10 characters. The contact, location, and name text fields are lim-

ited to 254 characters. Any standard, printable ASCII characters are

allowed.

46 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

To display the owner’s name text field enter info owner. To display the

contact information enter info contact. To display the name information

enter info name. To display the location information enter info location.To

display all the parameters enter info.

To change the info text, enter text after info owner or other info field

name.

interface Usage: interface: [e1|t1]

This command is used to set or display the payload data interface. The

user may select between EIA-530 and T1, or EIA-530 and E1.

Example response:

interface: {Line}: e1

interleave Usage: interleave [depth]

This command is used to set or display the interleave depth.

Example response:

interleave: 1

ip This command sets or displays the Internet Protocol (IP) data for the

LEDR radio. The subcommands allow you to set the IP address, IP net-

mask, IP gateway, or IP port.

Usage: ip [subcommand] [<argument>]

Subcommands: address [x.x.x.x]

netmask [x.x.x.x]

gateway [x.x.x.x]

IP port [ETH|AIR]

See “Network” on page 24 for additional information.

Example response: IP Address: 10.2.142.143

IP Netmask: 255.255.0.0

IP Gateway: 0.0.0.0

IP Port: ETH

iverify Usage: iverify [1–2] [<app|dsp|fpga|scripts>]

This command is used to determine the data integrity of the two soft-

ware image files that reside in the radio. (See also icopy, above.)

Example response:

iverify: Image has been veriﬁed

lcd Usage: lcd [<on|off|restore>]

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 47

This command starts a two-part test of the radio’s front panel LCD.

When lcd is first entered, the display should appear with all blocks.

When the Return key is pressed, the screen should change to completely

blank.

This command is used to test the front panel LEDs. If no argument is

given, all front panel LEDs (except POWER) should flash in sequence.

Press Control-C to end the test.

Command example:

led alarm on

Returns:

led: Alarm LED ON

line Usage: line [linelist] [cable <0-4> [spec]

This command is used to set or display the pulse template according to

the cable characteristics shown in Table 14 below.

linecode Usage: linecode [linelist] [HDB3|AMI]

This command sets or displays the radio’s linecode (B8ZS or AMI in T1

mode, HDB3 or AMI in E1 mode).

The [linelist] variable represents a list of line interfaces. It can consist of

a single line number or linename, a comma separated list of line num-

bers or linenames, a range of line numbers (i.e., 1–4), or if linelist is not

given all lines. See Table 13 on page 44 for a list of line numbers.

Example response:

linecode: HDB3

linerr Usage: linerr [linelist] [on|off]

Table 14. Line Selections vs. Cable Type

T1 Operation—100 Ω

Twisted Pair Cable E1 Operation

ITU-T G.703, 120 Ω Cable

0–1 to 133 feet (Default) g.775 (Default)

1–133 to 266 feet i.431

2–266 to 399 feet

3–399 to 533 feet

4–533 to 655 feet

48 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

This command is used to display, enable, or disable line errors. The

[linelist] variable represents a list of line interfaces. It can consist of a

single line number or linename, a comma separated list of line numbers

or linenames, a range of line numbers (i.e., 1–4), or if linelist is not given

all lines. See Table 13 on page 44 for a list of line numbers.

linemap Usage: linemap [maplist

This command is used to set or display the current span mapping con-

figuration. The maplist variable consists of from 1 to 4 alpha-numeric

characters specifying line interface to span mapping. Valid numbers are

1–4. Valid span characters are a–d.

Example: Entering linemap 1d 2b 3a 4c causes the following:

maps line 1 to span d

maps line 2 to span b

maps line 3 to span a

maps line 4 to span c

linename Usage: linename <linelist> <namelist>

This command is used to set or display the names for line interfaces.The

[linelist] variable represents a list of line interfaces. It can consist of a

single line number or linename, a comma separated list of line numbers

or linenames, a range of line numbers (i.e., 1–4), or if linelist is not given

all lines. See Table 13 on page 44 for a list of line numbers.

The namelist variable consists of a list of names. It can consist of a

single name or a comma/whitespace separated list of names. Names can

be up to 16 characters long.

log Usage: log [subcommand] [<argument>]

Subcommands: view [critical|major|minor|inform]]

ﬁlter [event #] [count]]

clear

send [ﬁlename] [hostIP]

This command is used to display and manage the event log file as fol-

lows:

The view subcommand displays the list of events with the associated

time and date as well as other system parameters.

The filter subcommand is used to sort events.

The clear subcommand resets the event log and purges all events from

memory.

The send subcommand uploads the send event log information to an IP

address using TFTP protocol.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 49

This command allows access to configuration and diagnostics informa-

tion as allowed by the radio system administrator.

Example:

ADAP> login .

Returns:

Username>

Type:

john (or appropriate user name)

Returns:

Password>

Type: (password)

NOTE: Passwords must not exceed eight characters.

See user command on page 58 for more information on user access

levels.

logout Usage: logout

This command is used to log out as a user of the radio configuration and

diagnostics functions.

Usage 2: loopback [inb|outb] [linelist] [on|off] [-u <code>] [-d <code>]

The loopback command is used to set or display the loopback mode that

can be used for diagnostic purposes. Entering loopback without any

parameters displays the current loopback mode.

Usage 1 subcommands:

The none subcommand disables all loopback operation. This is the mode

for normal point-to-point operation.

The rf subcommand enables an RF loopback mode. This mode allows

testing of the local transceiver’s transmit and receive chain.

RF loopback testing is a valuable diagnostic tool, but it should not be

considered an exhaustive test of the transceiver. In some cases, interac-

tion between the transmit and receive phase-locked loops (PLLs) can

occur, causing erroneous results during testing. Changing the trans-

ceiver’s RF output setting may resolve these problems.

ENTER

50 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

In addition, on all LEDR radios except the LEDR 1400 Series, the

transmit and receive frequencies must be within the same band for RF

loopback to function.

The local subcommand enables a local digital loopback mode. With this

test, incoming bits are sent back out the radio’s DATA connector before

the modem module. This can be used to verify proper interconnection

between the radio and the connected equipment. None of the radio’s RF

circuitry is involved in this test. (This description is true for EIA-530

operation only.)

For T1/E1 operation, the local subcommand enables a local digital MUX

loopback in the transceiver’s T1/E1 option card before going out to the

main board.

The remote subcommand instructs the radio at the other end of the link

to “echo” all of the data it receives. This is an effective way of testing

the entire communications system, including the transmission path over

the air. (In the event of a communications failure with the remote radio,

the message “Remote Error” is displayed, and no loopback mode is

selected. (This description is true for EIA-530 operation only.)

For T1/E1 operation, the remote subcommand mimics the ior subcom-

mand described below.

The iol subcommand refers to the local line loopback.

The linelist variable represents a list of local line interfaces. It can consist

of a single line number or linename, a comma separated list of line num-

bers or linenames, a range of line numbers (i.e., 1–4), or if linelist is not

given all lines. See Table 13 on page 44 for a list of line numbers.

The ior subcommand refers to the remote line loopback. Remote loop-

back port selection is relative to the local port. The radio link will trans-

late any line mapping to select the correct physical remote port to loop

back, based on the selected local port.

The timeout variable may be set between 0 minutes (never time out) and

60 minutes.

Usage 2 subcommands:

The inb subcommand refers to the inband loopback configuration.

The outb subcommand refers to the outband ESF (Extended Super

Frame) loopback configuration.

The linelist subcommand is identical to that described for Usage 1.

The on|off subcommands allow turning the loopback feature on or off.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 51

The -u <code> subcommand allows setting of the inband|outband loop-

back upcode.

The -d <code> subcommand allows setting of the inband|outband loop-

back downcode.

The inband code consists of 1-7 bits, binary format.

Example: 00001

The outband code consists of 6 bits within the 16 bit ESF data link code-

word.

Example: 000111

within 16 bit codeword: 0<000111>0 11111111

menu This command starts the LEDR radio’s menu wizard.

model Usage: model

This command displays the radio model number. This information is

programmed at the factory and cannot be changed.

modem Usage: modem [matrix id] [bandwidth] [+fdl] [+cas]

This command sets or displays the radio modem and data rate. Table 15

shows the available number-letter combinations that can be entered for

a radio with a 200 kHz bandwidth. Note that the E1/T1 selections are

only valid on radios equipped with an FT1 Option Board.

Command Example: To set 16-QAM/384 kbps, enter modem B4 200

network Usage: network

This command displays the radios that can be reached via the service

channel for Orderwire and Element Management System (EMS) diag-

nostics.

Table 15. Modem Command Arguments1

Modulation

Type 64

kbps 128

kbps 256

kbps 384

kbps 512

kbps 768

kbps

QPSK A1 A2 ————

16 QAM B1 B2 B3 B4 B5 —

32 QAM —————C6

1. The available selections depend on the radio’s factory

programmed bandwidth. See Table 17 on page 61 for

the allowable combinations of bandwidth, data rates

and modulation types.

52 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

passwd Usage: passwd

This command is used to program a new password for the user currently

logged in. A maximum of 8 characters is allowed.

pll Displays several key frequency control parameters, including the Min-

imum Frequency Step, the Reference Frequency, Oscillator Output Cur-

rent, TX Frequency, RX Frequency, and TX/RX PLL status.

Example response:

pll:

Min Freq Step = 25000 Hz, Reference = 400000 Hz, ICPO = 1600 uA

Tx Freq = 438075000 Hz, Rx Freq = 428075000

Tx PLL Status: Locked

Rx PLL Status: Locked

pmmode Usage: pmmode <On|Off>

This command is used to set or display the Modem Modulator Power

Measurement Mode.

Example Response:

pmmode: off

rdnt Usage: rdnt [subcommand] [arguments]

Subcommands: active

default

hitless

status

swxcvr

temp

mode

The rdnt command is used to manage protected operation of the LEDR

radio and display operating status through the use of the following sub-

commands:

The active subcommand shows whether the currently selected trans-

mitter is active or inactive.

The default subcommand displays whether the radio is the default radio

in a protected configuration.

The hitless subcommand sets or displays the hitless (error-free)

switching status. It can be enabled or disabled using the hitless on|off

command.

The ip subcommand is used to set or display the associated (sibling)

radio’s IP address.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 53

NOTE: The associated radio IP address should be programmed to the

IP address of the other radio connected to the protected

switching chassis. The associated radio IP address is used by

the redundant radio to share information between the units.

This address is necessary for warm-standby switching but not

for hot-standby. However, the redundant radio will perform

better if their associated radio IP address is programmed

correctly. The associated radio IP address does not affect IP

routing and forwarding, SNMP, or Telnet.

The status subcommand shows the state of both radios. Two status lines

are displayed; This Radio and Other Radio.

The swxcvr subcommand forces a switchover to the non-active trans-

ceiver. (The newly selected unit becomes the active transceiver.)

The temp command is used to set or display the over-temperature limit

(where switchover to the other radio occurs).

The mode command is used to set or display one of three redundant oper-

ation modes (0= Standalone, 1= 1+1 Hot Standby, 2= 1+1 Warm

Standby).

Example Response for rdnt command:

rdnt {status}: This Radio = OK

rdnt {status}: Other Radio = OK

rdnt {active}: inactive

rdnt {mode}: 1+1 Hot Standby

rdnt {ip}: 10.2.142.143

rdnt {hitless}:on

rdnt {default}: yes

rdnt {temp}: 80

reframe Usage: reframe [linelist] [2of4 | 2of5 | 2of6 | CFAS | CRC]

This command is used to set or display the reframe criteria. The [linelist]

variable represents a list of line interfaces. It can consist of a single line

number or linename, a comma separated list of line numbers or line-

names, a range of line numbers (i.e., 1–4), or if linelist is not given all

lines. See Table 13 on page 44 for a list of line numbers.

For Fractional T1:

2of4 – 2 out of 4 Fbit errors (default)

2of5 – 2 out of 5 Fbit errors

2of6 – 2 out of 6 Fbit errors

For Fractional E1:

CFAS – Consecutive FAS errors (default)

CRC – 915 CRC (rx framer only)

54 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

reprogram Usage: reprogram [subcommand] [<argument>]

Subcommands: serial [type] [length] [<offset>]

network [ﬁlename] [hostIP]

status

This write command reprograms the radio application software using

Trivial File Transfer Protocol (TFTP). A TFTP server must be running

on the network and properly configured to serve the necessary file(s).

rfocal Usage: rfocal <freq region#> <cal-point#>

This command starts the RFOUT Calibration Sequence. Example entry:

rfocal 0 0.

Example response:

Region 0

Index 0, Rfout = 18 dbm, Gain = 17

Index 1, Rfout = 20 dbm, Gain = 28

Index 2, Rfout = 22 dbm, Gain = 47

Index 3, Rfout = 25 dbm, Gain = 79

Index 4, Rfout = 27 dbm, Gain = 110

Index 5, Rfout = 30 dbm, Gain = 170

Index 6, Rfout = 32 dbm, Gain = 210

rfout Usage: rfout

This command displays the transmitter RF power output in dBm. See

“Watts dBm Volts conversion” on page 92.

rlogin Usage: [<toUnitID>[<UserName>]

The rlogin command is used to login to the remote radio via the console.

route The route command is used to add, delete or modify the IP routing table

entries.

Example resp: Destination Next Hop Net Mask Interface

0.0.0.0 0.0.0.0 0.0.0.0 ETH

10.0.0.0 10.2.142.143 255.255.0.0 ETH

10.2.0.0 10.2.142.143 255.255.0.0 ETH

10.2.142.144 10.2.142.143 255.255.255.255 AIR

127.0.0.1 10.2.142.143 255.255.255.255 LPBK

rssi Usage: rssi

This command displays the received signal strength indication in dBm.

rssical Usage: rssical <freq region#> <cal-point#>

This command starts the RSSI Calibration Sequence. Example entry:

rssical 0 0.

Example response:

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 55

Region 0

Index 0, RSSI = –110 dbm, Gain = –104

Index 1, RSSI = –90 dbm, Gain = –40

Index 2, RSSI = –75 dbm, Gain = +1

Index 3, RSSI = –60 dbm, Gain = +28

Index 4, RSSI = –45 dbm, Gain = +61

Index 5, RSSI = –30 dbm, Gain = +97

rxlock Usage: rxlock

This command displays the current modem lock status.

Example response: rxlock: Modem is locked

sabytes Usage: sabytes [linelist] [bytes <bytelist]

This command is used to set or display SA bytes in E1 multiframing.

The [linelist] variable represents a list of line interfaces. It can consist of

a single line number or linename, a comma separated list of line num-

bers or linenames, a range of line numbers (i.e., 1–4), or if linelist is not

given all lines. See Table 13 on page 44 for a list of line numbers.

The bytelist variable consists 5 hex bytes (i.e., 3c) representing SA[4-8].

To keep a bytes present value when modifying higher bytes (i.e., modi-

fying SA[7] only) use a * character in the respective byte position.

Example: sabytes 1 bytes *,*,*,3c changes only SA[7] for line 1 to 3c.

sernum Usage: sernum

This command displays the serial number of the radio. The number dis-

played with this command matches the serial number printed on the

serial number sticker on the radio chassis.

snmpcomm Usage: [<read|write|trap>][<string>]

This command is used to set or display SNMP community names.

Example response: snmpcomm {read}: public

snmpcomm {write}: private

snmpcomm {trap}: public

snr Usage: snr

This command displays the signal-to-noise ratio (SNR) of the received

signal in dB. The SNR is an indication of the quality of the received

signal. The higher this number, the higher the quality of the received

signal. SNR readings are not valid when there is an RX Alarm.

status Usage: status

This command is used to display the performance and configuration

data.

Example response:

56 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

status {Tx Freq}: 438075000

status {Rx Freq}: 428075000

status {Bandwidth}: 100 kHz

status {Data Rate}: 256 kbps

status {Clock Mode}: internal, remote, Line1, Line2, Line3, Line4

status {RSSI}: –100 dBm

status {SNR}: 0 dB

status {Rx Lock}: Unlocked

status {Tx RF Out}: 18.0 dBm

status {Temp}: 37 Degrees C

svch Usage: svch [subcommand] [<argument>]

Subcommands: baud [300|1200|2400|4800|9600|19200|38400]

csize [5–8]

parity [none|even|odd]

stop [0–2]

This command sets or displays the service channel settings.

telnetd [kill <session>]

This command is used to display or kill (terminate) the telnet session(s).

Ex. resp: Session Username Rem. Addr. Connected

tns0 ENGR 10.2.129.22 07/01/1999

@ 13:57:17

temp This command displays the radio’s power amplifier (PA) temperature.

Example response: temp: 35 Degrees C (PA Temperature)

test Usage: test [<0–n>|<testname>]

This command starts a self-test function of the radio. There are several

separate tests that can be run individually by specifying the test number

after the command.

The internal self tests are listed in Table 16.

Table 16. Internal self tests

Description Test

Number Test

Name

Flash memory test 0 flash

DRAM memory test 1 dram

Configuration test 2 config

Battery test 3 batt

Atod test 4 atod

Transmitter phase locked loop test 5 txpll

Receiver phase locked loop test 6 rxpll

Real Time Clock test 7 rtc

FPGA logic test 8 fpga

DSP test 9 dsp

CODEC test 10 codec

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 57

threshold Usage: [<threshold>] [<level>]

This command sets or displays the performance degradation

threshold(s) of the LEDR radio.

Example response: threshold {MinRssi}: 0

threshold {MinSNR}: 0

threshold {MaxTemp}: 70

threshold {Max15ErrSec}: 900

threshold {Max15SevereErrSec}: 900

threshold {Max24ErrSec}: 86400

threshold {Max24SevereErrSec: 86400

time Usage: time [HH:MM[:SS]

This command displays or sets the time of the radio’s internal real-time

clock. The radio’s real time clock operates from an internal lithium bat-

tery so it is running even if the radio has no DC power connected.

The real time clock is fully compliant with year 2000 standards.

timeslot Usage 1: timeslot [-d] [slotlist]

Usage 2: timeslot -c

This command has two uses; In usage 1, the timeslots can be set or dis-

played. In usage 2, all pending timeslots are committed.

Modifications to the timeslot list are kept pending until all available

slots have been assigned. The user can choose to commit slots when the

last available slot is added to the pending list or by using the -c option.

(See Usage 2.)

The default action is to enable given timeslots. If no arguments are

entered, the currently active timeslots and pending timeslots are dis-

played.

The slotlist variable is a list of timeslots and can be a single slot number,

comma separated list of slot numbers, or a range of slot numbers (i.e.,

2-8). Timeslots can be entered in any order and are automatically con-

figured. Extra slots will be ignored. Unassigned timeslots in the pending

list are signified by MA (must assign).

Options:

–d Disable timeslot(s)

–c Commit pending timeslots

NOTE: T1 timeslots are 1–24. E1 timeslots are 0–31.

58 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

trapfilter Usage: trapﬁlter [<critical|major|minor|inform>]

This command sets or displays which events cause SNMP traps.

trapmgr [<1-5>] [<IP address>]

This command sets or displays the trap manager IP addresses.

Example response: trapmgr: 1 = 10.2.129.22

trapmgr: 2 = 0.0.0.0

trapmgr: 3 = 0.0.0.0

trapmgr: 4 = 0.0.0.0

trapmgr: 5 = 10.2.129.1

trend Usage: trend

This command is used to display continuously updated readings of:

RSSI, radio temperature, RF output, signal-to-noise ratio, and FEC

errors (correc ted and uncorrected). The display can be stopped by

pressing Control-C on the terminal.

txkey Usage: txkey [on|off]

This command sets or displays the transmitter status. ON indicates the

radio is keyed and transmitting. OFF indicates the transmitter is not

keyed and is not transmitting.

unitid Usage: unitid [<ID>]

This command sets or displays the radio’s unit identification number.

This number is used for Orderwire signaling and the EMS (Element

Management System).

uptime Usage: uptime

This command displays how long the radio has been powered-on.

user Usage: user [subcommand] [<argument>]

Subcommands: add <user> <pass> <perm>

del <user>

perm <user> <perm>

pass

This command provides administrator access for setting new user

accounts and permission levels.

The password (pass) and user names are case sensitive and may not

exceed eight characters. The characters \\ may be used as a “blank” pass-

word.

User permission (perm) may be set to: read (r), write (w), network (n) or

administrator (a). The privileges granted by each level are as follows:

• Read (r) is the lowest level of user access and allows radio informa-

tion to be viewed only. Changes to radio settings are not allowed.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 59

• Write (w) allows most, but not all radio settings to be changed.

• Network (n) allows everything permitted by lower levels, and also

allows changes to the radio’s IP conﬁguration.

• Administrator (a) allows everything permitted in lower levels, and

also allows changes to be made to user accounts (add, delete, mod-

ify). It is normally used by a System Administrator or other person

responsible for the radio system.

Example entry: user add John <password> w

The above example shows the command string for adding a new user

(John), with “write” permission.

Example response: user: Command Complete

NOTE: If you are logging in for the first time since the radio was

shipped from the factory, refer to page 16 for important login

information.

ver Usage: ver [frw|hdw|ext]

This command displays radio version information for firmware (frw),

hardware (hdw) and Extended Version Information (ext).

Example response: ver: ADAP Part #06-3451A01

ver: 1.0.0

volume <volume>

This command sets or displays the orderwire handset volume.

Example response: volume: 100

vox <vox threshold>

The vox command sets or displays the orderwire vox (voice-operated

transmit) threshold.

Example response: vox: 5

who Usage: who

This command displays users currently logged in to the radio operating

system.

3.5 SNMP Network Management

Simple Network Management Protocol (SNMP) offers a comprehensive

solution to network management. It allows full configuration, perfor-

mance monitoring, fault diagnosis and security administration of an

entire LEDR radio network.

60 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

The LEDR radio uses approximately 140 specific SNMP manageable

objects in a IETF standard MIB II as well as a custom MIB. Off the shelf

SNMP managers such as SNMPc and HP OpenView may be used to

access the LEDR radio’s SNMP MIB to manage the network. Using

industry-standard SNMP managers allows seamless integration of the

LEDR network or existing systems.

Detailed information for using SNMP is provided in the SNMP Hand-

book (P/N 05-3532A01) available from Adaptive Broadband/MDS.

3.6 Using the Orderwire

A handset may be plugged into the front panel of the LEDR radio to

allow voice communications between radio sites (see Figure 15). This

can be especially useful during setup and service of the radio equipment.

The Orderwire function operates similar to a party line. All radios on the

network can hear what is said by any individual speaking into a handset.

The alert function however, can be directed toward a specific radio.

Normal payload data is not affected by Orderwire use. The Orderwire

uses voice-compression technology that introduces a slight, but notice-

able, delay in Orderwire audio.

The Orderwire supports the use of DTMF-type (tone) signaling.

An optional handset (P/N 12-1307A01) is required to use the Orderwire.

1. Plug the handset into the front panel jack labeled . (Figure 22

on page 84 provides pinout details for this connector.)

2. Press or until Orderwire appears on the LCD display.

3. To call a speciﬁc radio station, enter the Unit ID number for the sta-

tion to be called. (At this point, an alert signal will be sent to a spe-

ciﬁc station to “ring” the desired unit.)

4. Press the PTT on handset and speak to the other station(s). Release

the handset PTT to listen. VOX (voice-activated transmit) operation

is also supported.

5. Alternatively, a DTMF-style handset can be used to “dial” the

required radio station.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 61

Invisible place holder

Figure 15. Orderwire Connection

3.7 Bandwidths, Data Rates and Modulation Types

The available bandwidth is permanently configured at the factory and

cannot be changed by the user. However, the modulation type and data

rate can be changed provided the bandwidth is sufficient to support the

modulation type and data rate. Table 17 shows the combinations of

radio bandwidth, data rates and modulation types that are available at

the time of publication.

Use of the modem command (page 51) automatically determines if the

combination of data rate, bandwidth and modulation type is allowable.

Table 17. Bandwidth vs. Modem Selection

Radio

Bandwidth Modem

Selection Data Rate(s) Modulation

25 kHz B1 64 kbps 16-QAM

50 kHz A1 64 kbps QPSK

50 kHz B2 128 kbps 16-QAM

100 kHz A2 128 kbps QPSK

100 kHz B3 256 kbps 16-QAM

200 kHz A3 256 QPSK

200 kHz B4, B5 384, 512 kbps 16-QAM

200 kHz C6 768 kbps 32-QAM

62 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

3.8 Transmit Clock Selection

The transmit clock selection must be addressed for every radio in every

installation. The single most important consideration is that there be

only one master clock in the radio network. The master clock can origi-

nate from the radio or from the Customer Premise Equipment (CPE).

The radio is capable of several different clocking modes. Refer to

Figure 16, Figure 17 and Figure 18 for typical system clocking

methods.

Refer to the Clock Mode screen description on page 27 for setting the

radio transmit clocking from the front panel. Refer to the clkmode

description on page 42 for setting the radio transmit clocking mode from

the console port.

NOTE: When customer premises equipment (CPE) is operated in

looped clock mode, it is recommended that the radio not be set

to line clock mode. To do so may cause the transmitting radio’s

PLL to be pulled out-of-lock, especially when operating at 4E1

data rates.

Invisible place holder

Figure 16. E1/T1 and Fractional Clocking Arrangements

(Between computing equipment unless both devices at the ends of the

link are driven by a common clock source)

Over-the-Air RF Path

Network Line 1, 2, 3, 4 Remote Looped Clock

CPE

Customer Premises

Equipment (CPE) LEDR Radio

Clock Source

CPE

Network* Line 1, 2, 3, 4 Line 1, 2, 3, 4 Network

Looped Clock Internal Clock Remote Looped Clock

Internal Clock Line 1, 2, 3, 4 Remote Looped Clock

Customer Premises

Equipment (CPE)

SITE A SITE B

* This mode suitable for most voice applications. It is not recommended for data transmission between computing equipment.

LEDR Radio

Clock Source

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 63

Invisible place holder

Figure 17. EIA-530 Clocking Arrangements

Invisible place holder

Figure 18. Typical Repeater Clocking Arrangement

(no multiplexer at repeater site)

Over-the-Air RF Path

CPE

Customer Premises

Equipment (CPE) LEDR Radio

Clock Source

CPE

Internal Clock External Clock Looped Clock External Clock

External Clock Internal Clock Looped Clock External Clock

Customer Premises

Equipment (CPE)

SITE A SITE B

LEDR Radio

Clock Source

CPE

REPEATER NULL-MODEM

DATA INTERCONNECT CABLE

ETHERNET CROSS-CABLE

REPEATER SITE

CPE

SITE A

SITE B

SITE C

LEDR Radio

Clock Source: Remote

LEDR Radio Clock

Source: Line 1, 2, 3, 4

LEDR Radio

Clock Source: Remote

Network or

Internal Clock

Looped Clock

Mode

Scenario 1:

LEDR Radio Clock

Source: Internal

Scenario 2:

Scenario 1:

Scenario 2:

Looped Clock

Mode

LEDR Radio Clock

Source: Line 1, 2, 3, 4

64 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

3.9 Protected (1+1) LEDR Radio

The LEDR radio may also be supplied in a Protected (redundant) con-

figuration (Figure 19). The protected version is designed to perform

automatic switchover to a second radio in the event of a failure in the

primary unit.

Protected operation is important for many mission critical or revenue

producing links. By configuring two identical LEDR radios in parallel

and including a third switch box containing the RF switching circuits

and the customer interfaces, it is possible to protect against failure in any

of the LEDR radio sub-systems, either through malfunction or external

environmental effects such as multipath fading or nearby lightning

strikes.

A Protected station consists of two standard LEDR radios and a Pro-

tected Switch Chassis (center unit in Figure 19). Ordinarily, the three

chassis are mounted together in a “stacked” arrangement as shown.

Invisible place holder

Figure 19. LEDR Radio Protected Version

Protected Operation

During normal operation, one radio path is selected and the RF and

interface switches are set to service that path. (An LED indicator on the

front panel of the Protected Switch Chassis shows the active unit.) A

switch on the transmitter circuitry allows one transmitter to be con-

nected to the antenna port. On the receive path, a coupler allows both

radio receivers to detect the receive signal.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 65

Transmitter Failure Any failure on the "active" transmitter path will raise a fault condition

causing the transmit switch to change and the "standby" transmitter to

become the "active" unit. Fault conditions can be programmed from the

Network Management System (NMS) software, and can be parameters

such as:

• Low transmitter power

• High transmitter temperature

• Synthesizers out of lock

• Problem with the option board or framers

• CPU failure wherein the CPU watchdog causes a reset

• Fan fault

The newly "active" transmit path will remain in use until a manual

changeover returns the configuration to the original transmitter path.

This allows the link to remain fully operational until the user has

replaced the faulty transmitter circuitry.

Receiver Failure Both receivers are fed via an RF splitter from the antenna port. Both

receive paths are buffered and monitored for receive signal integrity via

uncorrectable bit errors. If the "active" receive circuitry fails, uncorrect-

able bit errors will be detected. The modem receive switch will first

determine that the "standby" receive path is operational (no uncorrect-

able bit errors) and will switch accordingly.

The protected LEDR radio is available with a number of configuration

options, each designed to optimize particular system solutions:

•1+1 operation - warm or hot standby: In a warm standby link,

the standby transmitter is powered down. In a hot standby link,

the standby transmitter is powered up and transmitted in a

dummy load. The warm standby option offers the advantages of

significantly reduced power consumption, since only one trans-

mitter path is powered. However, upon transmitter failure, the

switchover takes longer due to the transmitter having to be pow-

ered. Thus the hot standby offers the advantages of faster

switchover time and increased overall system availability.

•1+0 operation: In some applications the user wants the flexibil-

ity to offer protected (1+1) operation in the future, but operates

a critical link that cannot be decommissioned for the upgrade.

The 1+0 configuration provides a single LEDR radio wired

through the switch box. This configuration can be upgraded to

a full 1+1 protected radio by adding the second radio, without

taking the 1+0 radio out of commission and losing critical data.

•Symmetrical or asymmetrical receiver splitters: The default

protected radio is configured with a 3 dB splitter on the receive

path, meaning that each radio’s receiver signal level is equal,

but typically 4dB worse than an unprotected radio (3dB due to

66 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

splitter, plus 1dB cabling and additional connectors). As an

option, an asymmetrical splitter (1dB / 10dB) is offered. Using

this option, the active path is 2 dB stronger than with a symmet-

rical splitter (1dB compared to 3dB splitter loss), allowing for a

better fade margin and increased system availability during nor-

mal operation.

However, upon receiver change over, the receive signal strength

will be significantly reduced due to the 10dB of splitter loss

rather than the equal splitter’s 3dB loss, making the link more

prone to fades in this temporary changed over state. Providing

the failed standby receiver is replaced within a short period of

time, many users find that the asymmetric splitter’s increased

normal performance offsets any derating in the temporary

switched state.

Space Diversity Operation

Space diversity operation is an effective mechanism of increasing a

radio link’s resilience to transmission impairments such as multipath

fading or frequency selective fading. In difficult transmission environ-

ments such as over highly reflective and moving water paths, or in arid

environments where atmospheric ducting occurs, space diversity is the

most effective way of maintaining a continuous radio link.

In a space diversity link, two radio receivers are operated in parallel,

from two separate antennas mounted several wavelengths apart verti-

cally on the antenna tower. The separation of antennas is such that when

one antenna experiences fading due to multi-path interference, the other

antenna, being several wavelengths away, will not experience the same

fade. Thus, one receive path may experience uncorrectable errors, while

the other path will be error free. Similar to the protected operation, the

receive modem switch will determine which buffered data path is oper-

ating with the highest integrity, and select that path without inducing

any additional bit errors into the link.

Space diversity is especially effective in changeable multi-path environ-

ments such as over tidal water paths. Since water is highly reflective,

there will be continual "constructive" and "destructive" interference at

each single antenna over the course of the day as the water rises and falls

and the reflected water path interferes with the line-of-sight path. By

correct vertical positioning of the antennas, these effects can be negated,

allowing one antenna to see a good signal while the other is experi-

encing fading, and the modem switching accordingly to allow the link

to operate error- free.

The space diversity LEDR radio is available only in a hot standby con-

figuration, with a symmetrical 3dB coupler on the receive paths.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 67

User Interface & Control

Protected operation is configured using the Redundant screen (page 34)

on either radio front panel, or with the rdnt command from a console ter-

minal (see page 52).

3.10 Fractional T1 Interface Card (Optional

Equipment)

The fractional T1 interface (FT1) option (P/N 03-3846A01) provides

additional connectivity within a LEDR network. The installation of an

FT1 option board inside the radio allows the standard EIA-530 customer

data interface to be bypassed and connection directly to a G.703 T1

interface.

With the FT1 option, users are able to place a LEDR link from a network

service access point to a remote site, where an installation supports mul-

tiple communications devices. Direct interface to customer equipment

such as channel banks is possible without the use of expensive protocol

converters.

See “Field Installation of FT1 Option Board Non-protected:

03-3846A01 Protected: 03-3539A01” on page 78 for instructions on

adding this option to a LEDR radio.

Fractional T1 Performance

The FT1 option allows the LEDR radio to be connected directly with a

G.703 T1 interface. The line rate of the interface operates at the T1 rate

of 1.544 Mbps. Twelve user selectable DS-0 timeslots are transmitted

over the air in the maximum FCC / IC allowed 200 kHz occupied band-

width in the 960 MHz FCC / IC frequency band. The T1 interface is

G.703 at 100 Ω line impedance. Physical connection is via an RJ48C

jack on the rear panel.

Configurable

Parameters The following performance specifications of the T1 fractional interface

are adjustable by the user. All of these parameters are manageable

locally, or over the air via SNMP network management. (Refer to the

SNMP Handbook, P/N 05-3532A01 for more information.)

Timeslots and Framing—Twelve DS-0 timeslots are permitted, with

selection arbitrary. The selection of timeslots may be different at each

end of the link, provided their number is equal. The timeslots may not

be reordered.

Alarm signals RAI and AIS are generated as appropriate. The user may

optionally have these signals forwarded over the RF link.

The frame format is selectable among: FT only, ESF without CRC

checking and generation, SF (D4), SF with JYEL indication, ESF with

CRC checking and generation.

68 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

The re-framing criteria may be adjusted to the following settings: 2 out

of 4 Fbit errors, 2 out of 5 Fbit errors, 2 out of 6 Fbit errors.

Line Codes—Standard T1 line codes are supported: B8ZS, AMI, and

per-channel B7ZS.

Diagnostics The T1 line at each end of the link may be tested using a variety of bit

patterns. In normal operation, statistics are stored for any errors occur-

ring at the line interface, such as framing errors, bipolar violations, and

CRC errors.

Data may be looped back at the local port, through the T1 option only,

and at the remote unit. Further, the unit will respond to in-band (SF) and

data link (ESF) loopback codes at the local port.

When in ESF framing mode, the option can automatically generate per-

formance report messages.

The following alarms may be monitored & logged. They may also be

associated with a user-selectable indication (alarm contact or front panel

LED): Remote Loopback, Lost Frame, Lost Signal, Lost Analog Signal,

AIS, RAI (RYEL), MultiFrame RAI, Severely Errored Frame, Frame

Re-Align, MultiFrame AIS, Far End Block Error, Line Code Error, CRC

Errors and Frame Bit Error.

Clocking—The clock source is configurable for network, loopback, and

internal timing, with secondary selections available should the primary

source become faulty.

4.0 RADIO EVENT CODES

Table 18 lists the event codes that may be encountered during operation

of the radio. These codes may be read from a console terminal using the

events pending command. (See page 43 for a full description of the events

command.)

NOTE: The event codes listed here are available on radios equipped

with an FT1 Option Board. Standard “S” Series radios will

display fewer codes.

Table 18. Event Codes

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

0 EXT_ALARM_IN1 External Alarm Input #1 ALARM CRITICAL

1 EXT_ALARM_IN2 External Alarm Input #2 ALARM CRITICAL

2 EXT_ALARM_IN3 External Alarm Input #3 ALARM CRITICAL

3 EXT_ALARM_IN4 External Alarm Input #4 ALARM CRITICAL

4 MODULATOR_EV Communication failure

with modulator ALARM CRITICAL

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 69

5 DEMODULATOR_EV Communication failure

with demodulator ALARM CRITICAL

6 MOD_SELFTEST Modulator selftest failed NONE CRITICAL

7 DEMOD_SELFTEST Demodulator selftest

failed NONE INFORM

8 PERM_REGN_CHECKSUM Permanent region

checksum failed NONE INFORM

9 APP1_REGN_CHECKSUM Application #1 checksum

failed NONE INFORM

10 APP2_REGN_CHECKSUM Application #2 checksum

failed NONE INFORM

11 BOOT_REGN_CHECKSUM Boot loader checksum

failed NONE INFORM

12 CONF1_REGN_CHECKSUM Configuration Data region

#1 checksum failed NONE INFORM

13 CONF2_REGN_CHECKSUM Configuration Data region

#2 checksum failed NONE INFORM

14 RTC_TEST Real-time clock error NONE INFORM

15 BBRAM_TEST NV-RAM test failed NONE INFORM

16 BATTERY_LOW NV-RAM battery is low ALARM MAJOR

17 TX_SYNTH_LOCK Transmit Synthesizer

out-of-lock TXALARM CRITICAL

18 RX_SYNTH_LOCK Receive Synthesizer

out-of-lock RXALARM CRITICAL

19 DIG_POWER_REF Digital Power Reference

is out of specified range ALARM CRITICAL

20 TEMPERATURE Temperature sensor

reads over 80 degrees

Celsius

ALARM CRITICAL

21 TX_POWER_LOOP Transmit Power Loop is

out-of-lock TXALARM MAJOR

22 DEMOD_SNR_LOW Demodulator

Signal-to-Noise ratio is

unacceptably low

NONE MINOR

23 DEMOD_AGC_RSSI Demodulator Automatic

Gain Controlled RSSI too

low

NONE MINOR

24 DEMOD_FEC_RECOVER FEC circuitry has detected

and corrected one or more

errors

NONE MINOR

25 DEMOD_FEC_UNRECOVER FEC circuitry has detected

one or more uncorrectable

errors

NONE MINOR

26 DEMOD_MULTIPATH Excessive multipath

distortion detected NONE MINOR

27 DEMOD_ACQUISITION Demodulator lost sync.

lock on received signal RXALARM CRITICAL

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

70 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

28 TX_TO_REMOTE_RX Problem with link between

the local transmitter &

remote Rx

ALARM CRITICAL

29 REDUNDANT_ALARM Problem with redundant

unit ALARM CRITICAL

30 WDOG_TIME_OUT Processor watchdog has

expired and reset the

processor

ALARM CRITICAL

31 RX_OFF Radio is not receiving due

to a weak signal or

equipment failure

RXALARM CRITICAL

32 SOFTWARE_TX_OFF Software command has

unkeyed the radio TXALARM CRITICAL

33 RTC_NOT_SET The real time clock is not

programmed NONE MINOR

34 IO1_DIG_LOC_lOOPBACK The radio’s 530 or TELCO

I/O port is in Digital local

loopback mode

NONE INFORM

35 IO2_DIG_LOC_lOOPBACK The radio’s 2nd TELCO

I/O port is in Digital local

loopback mode

NONE INFORM

36 IO3_DIG_LOC_lOOPBACK The radio’s 3rd TELCO

I/O port is in Digital local

loopback mode

NONE INFORM

37 IO4_DIG_LOC_lOOPBACK The radio’s 4th TELCO

I/O port is in Digital local

loopback mode

NONE INFORM

38 RF_LOCAL_LOOPBACK The radio is in Local RF

loopback test mode NONE INFORM

39 IO1_DIG_REM_LOOPBACK The radio’s 530 or TELCO

I/O port is in Digital

Remote loopback mode

NONE INFORM

40 IO2_DIG_REM_LOOPBACK The radio’s 2nd TELCO

I/O port is in Digital

Remote loopback mode

NONE INFORM

41 IO3_DIG_REM_LOOPBACK The radio’s 3rd TELCO

I/O port is in Digital

Remote loopback mode

NONE INFORM

42 IO4_DIG_REM_LOOPBACK The radio’s 4th TELCO

I/O port is in Digital

Remote loopback mode

NONE INFORM

43 RAW_SERVICE_CHANNEL The Raw Service Channel

data frame is exhibiting

error

ALARM MAJOR

44 ATOD_REFERENCE A fault is detected with the

Analog to Digital converter ALARM CRITICAL

45 NEW_CONFIG_REV A new revision of

configuration data

structure has been

detected

NONE INFORM

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 71

46 FPGA_LOAD FPGA is not loaded

correctly NONE INFORM

47 DATE_TIME_CHANGE The date or time is been

modified NONE INFORM

48 HARDWARE_TX_OFF The transmitter key

hardware is in an unkeyed

state

TXALARM CRITICAL

49 INACTIVE_ON Current transceiver is in

standby mode when in

protected radio chassis

ALARM MAJOR

50 NO_OPTION_UNIT No Option Card is

detected NONE INFORM

51 VOCODER_INIT_ERR The voice processor

initialization failed ALARM MAJOR

52 VOCODER_ERROR The voice processor is

reporting a problem ALARM MAJOR

53 POWER_ON_RESET This indicates PowerOn

Reset Cycle NONE INFORM

54 EXT_HARD_RESET This indicates last

Power-Up Cycle was due

to External Hard Reset

NONE INFORM

55 EXT_SOFT_RESET This indicates last

Power-Up Cycle was due

to External Soft Reset

NONE INFORM

56 INACT_CONFIG_SYNC Protected 1+1 mode

Active to Inactive

Configuration data sync.

error

ALARM CRITICAL

57 NEW FIRMWARE LOADED New firmware has been

downloaded from flash

memory.

NONE INFORM

58 CONFIG_CHANGED The transceiver

configuration has been

modified

NONE INFORM

59 SELFTEST_COMPLETE A self test has completed

execution NONE INFORM

60 PERFORM_DEGRADED A performance

degradation threshold has

been exceeded

ALARM INFORM

61 DUPLICATE_UNIT_ID Another unit with the

same unit ID has been

detected

ALARM INFORM

62 LINK_UNAVAILABLE The G821 status indicates

that the link is unavailable NONE INFORM

63 EVENT_LOG_CLEARED The event log has been

cleared NONE INFORM

64 FAN1_TROUBLE There is a problem with

the fan ALARM INFORM

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

72 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

65 Reserved for future use ———

66 USER_REBOOT The user has rebooted the

radio NONE INFORM

67 MODEM_LOCAL_LOOPBACK Modulator data path is

locally looped back to

Demodulator.

NONE INFORM

68 MODEM_REMOTE_LOOPBA

CK Demodulator data path is

looped back to modulator

for remote radio loopback

application

NONE INFORM

69 OPT_MUX_LOOBACK Option card multiplexed

data path from Line(s) is

looped back.

NONE INFORM

70 IO1_REM_LOOPBACK_SERV Radio is server for remote

radio loopback mode with

its payload data at Line IO

#1 looped back to the

commanding local radio.

NONE INFORM

71 IO2_REM_LOOPBACK_SERV Radio is server for remote

radio loopback mode with

its payload data at Line IO

#2 looped back to the

commanding local radio.

NONE INFORM

72 IO3_REM_LOOPBACK_SERV Radio is server for remote

radio loopback mode with

its payload data at Line IO

#3 looped back to the

commanding local radio.

NONE INFORM

73 IO4_REM_LOOPBACK_SERV Radio is server for remote

radio loopback mode with

its payload data at Line IO

#4 looped back to the

commanding local radio.

NONE INFORM

74 IO1_RECVR_LOF Line IO #1 receiver

Loss-of-framing alarm. I/O ALARM CRITICAL

75 IO1_RECVR_LOS Line IO #1 receiver

Loss-of-signal alarm. I/O ALARM CRITICAL

76 IO1_RECVR_ALOS Line IO #1 receiver

Loss-of-analog-signal

alarm.

I/O ALARM CRITICAL

77 IO1_RECVR_AIS Line IO #1 receiver

detected AIS alarm. I/O ALARM CRITICAL

78 IO1_RECVR_RAI Line IO #1 receiver

detected RAI (yellow)

alarm.

I/O ALARM CRITICAL

79 IO1_RECVR_MRAI Line IO #1 receiver

detected multi-framed RAI

(yellow) alarm.

I/O ALARM CRITICAL

80 IO1_RECVR_SEF Line IO #1 receiver

detected Severely Errored

Frames.

I/O ALARM CRITICAL

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 73

81 IO1_RECVR_COFA Line IO #1 receiver

detected

Change-of-Frame-

Alignment alarm.

I/O ALARM CRITICAL

82 IO1_RECVR_MAIS Line IO #1 receiver

detected multi-framed AIS

alarm.

I/O ALARM CRITICAL

83 IO1_RECVR_FEBE Line IO #1 receiver

detected E1

Far-End-Block-Errors

alarm.

I/O ALARM INFORM

84 IO1_RECVR_LCV Line IO #1 receiver

detected Line-Code-

Violation alarm.

I/O ALARM INFORM

85 IO1_RECVR_CRC Line IO #1 receiver

detected CRC alarm. I/O ALARM INFORM

86 IO1_RECVR_FBIT Line IO #1 receiver

detected Frame Bit Error. I/O ALARM INFORM

87 IO2_RECVR_LOF Line IO #2 receiver

Loss-of-framing alarm. I/O ALARM CRITICAL

88 IO2_RECVR_LOS Line IO #2 receiver

Loss-of-signal alarm. I/O ALARM CRITICAL

89 IO2_RECVR_ALOS Line IO #2 receiver

Loss-of-analog-signal

alarm.

I/O ALARM CRITICAL

90 I02_RECVR_AIS Line IO #2 receiver

detected AIS alarm. I/O ALARM CRITICAL

91 IO2_RECVR_RAI Line IO #2 receiver

detected RAI (yellow)

alarm.

I/O ALARM CRITICAL

92 IO2_RECVR_MRAI Line IO #2 receiver

detected multi-framed RAI

(yellow) alarm.

I/O ALARM CRITICAL

93 IO2_RECVR_SEF Line IO #2 receiver

detected Severely Errored

Frames.

I/O ALARM CRITICAL

94 IO2RECVR_COFA Line IO #2 receiver

detected

Change-of-Frame-

Alignment alarm.

I/O ALARM CRITICAL

95 IO2_RECVR_MAIS Line IO #2 receiver

detected multi-framed AIS

alarm.

I/O ALARM CRITICAL

96 IO2_RECVR_FEBE Line IO #2 receiver

detected E1

Far-End-Block-Errors

alarm.

I/O ALARM INFORM

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

74 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

97 IO2_RECVR_LCV Line IO #2 receiver

detected

Line-Code-Violation

alarm.

I/O ALARM INFORM

98 IO2_RECVR_CRC Line IO #2 receiver

detected CRC alarm. I/O ALARM INFORM

99 IO2_RECVR_FBIT Line IO #2 receiver

detected Frame Bit Error. I/O ALARM CRITICAL

100 IO3_RECVR_LOF Line IO #3 receiver

Loss-of-framing alarm. I/O ALARM CRITICAL

101 IO3_RECVR_LOS Line IO #3 receiver

Loss-of-signal alarm. I/O ALARM CRITICAL

102 IO3_RECVR_ALOS Line IO #3 receiver

Loss-of-analog-signal

alarm.

I/O ALARM CRITICAL

103 IO3_RECVR_AIS Line IO #3 receiver

detected AIS alarm. I/O ALARM CRITICAL

104 IO3_RECVR_RAI Line IO #3 receiver

detected RAI (yellow)

alarm.

I/O ALARM CRITICAL

105 IO3_RECVR_MRAI Line IO #3 receiver

detected multi-framed RAI

(yellow) alarm.

I/O ALARM CRITICAL

106 IO3_RECVR_SEF Line IO #3 receiver

detected Severely Errored

Frames.

I/O ALARM CRITICAL

107 IO3_RECVR_COFA Line IO #3 receiver

detected

Change-of-Frame-

Alignment alarm.

I/O ALARM CRITICAL

108 IO3_RECVR_MAIS Line IO #3 receiver

detected multi-framed AIS

alarm.

I/O ALARM CRITICAL

109 IO3_RECVR_FEBE Line IO #3 receiver

detected E1

Far-End-Block-Errors

alarm.

I/O ALARM INFORM

110 IO3_RECVR_LCV Line IO #3 receiver

detected Line-Code-

Violation alarm.

I/O ALARM INFORM

111 IO3_RECVR_CRC Line IO #3 receiver

detected CRC alarm. I/O ALARM INFORM

112 IO3_RECVR_FBIT Line IO #3 receiver

detected Frame Bit Error. I/O ALARM INFORM

113 IO4_RECVR_LOF Line IO #4 receiver

Loss-of-framing alarm. I/O ALARM CRITICAL

114 IO4_RE CVR_LOS Line IO #4 receiver

Loss-of-signal alarm. I/O ALARM CRITICAL

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 75

115 IO4_RECVR_ALOS Line IO #4 receiver

Loss-of-analog-signal

alarm.

I/O ALARM CRITICAL

116 IO4_RECVR_AIS Line IO #4 receiver

detected AIS alarm. I/O ALARM CRITICAL

117 IO4_RECVR_RAI Line IO #4 receiver

detected RAI (yellow)

alarm.

I/O ALARM CRITICAL

118 IO4_RECVR_MRAI Line IO #4 receiver

detected multi-framed RAI

(yellow) alarm.

I/O ALARM CRITICAL

119 IO4_RECVR_SEF Line IO #4 receiver

detected Severely Errored

Frames.

I/O ALARM CRITICAL

120 IO4_RECVR_COFA Line IO #4 receiver

detected

Change-of-Frame-

Alignment alarm.

I/O ALARM CRITICAL

121 IO4_RECVR_MAIS Line IO #4 receiver

detected multi-framed AIS

alarm.

I/O ALARM CRITICAL

122 IO4_RECVR_FEBE Line IO #4 receiver

detected E1

Far-End-Block-Errors

alarm.

I/O ALARM INFORM

123 IO4_RECVR_LCV Line IO #4 receiver

detected

Line-Code-Violation

alarm.

I/O ALARM INFORM

124 IO4_RECVR_CRC Line IO #4 receiver

detected CRC alarm. I/O ALARM INFORM

125 IO4_RECVR_FBIT Line IO #4 receiver

detected Frame Bit Error. I/O ALARM INFORM

126 DIG_REM_LOOPBACK For EIA-530, local radio is

in remote loopback mode NONE INFORM

127 SERV_REM_LOOPBACK For EIA-530, local radio

(as remote server) is

serving remote loopback

mode.

NONE INFORM

128 BAD_CLKMODE Line framers detected bad

clock mode configuration. NONE INFORM

Table 18. Event Codes (Continued)

ID EVENT NAME DESCRIPTION DEFAULT

LED SNMP

TRAP

LEVEL

76 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

5.0 FIELD REPROGRAMMING

The LEDR radio’s firmware can be upgraded with new software

releases that may be issued from time to time by Adaptive Broad-

band/MDS. Reprogramming can be done serially through the front

panel console port or over a network connection via TFTP. The

TFTP method provides a way of downloading to the radio without being

physically at the radio’s location.

To support firmware upgrades while the radio is in use, the LEDR radio

contains two complete copies of its firmware. Once the download is

complete, the radio can be rebooted using the new code. However, if an

error occurs during the download, the radio can easily recover because

it always has a complete copy of firmware available.

The steps below explain how to program new firmware into the radio

using both the console port and TFTP methods.

5.1 Reprogramming via the Console Port

Set Up

Connect a PC to the radio’s front panel console port using a 9-pin

RS-232 cable. (See Figure 23 on page 85 for cable wiring details.)

Download Procedure

1. Start the FlashUtil Windows application available from Adaptive

Broadband/MDS. From the View|Options menu, select the

appropriate com port and baud rate.

2. Ensure that autobaud is enabled (see lower right corner of the

FlashUtil window). From the View menu, select console. This will

bring up a console window to the LEDR radio. At the ADAP>

prompt, enter a login name and password and then close the console.

3. Using the File|Open dialog, select the directory where the new ﬁrm-

ware is located. In the ﬁle window, highlight the correct (.mpk) ﬁle

and then press the green start arrow.

Verification and Reboot

To verify the new code, open the console again by pressing Alt + L.

Enter boot to determine which image is currently active. This command

will respond as follows:

boot: Image 1 is Active or: boot: Image 2 is Active

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 77

The new firmware is downloaded into the inactive image. Therefore, if

the radio responded Image 1 is Active, enter iverify 2, otherwise, enter

iverify 1. The radio will respond indicating whether or not the image has

been verified. If the image does not verify, try downloading the code

again. If the download fails after repeated attempts, the hardware may

be damaged. For a replacement board please contact the factory using

the information given at the back of this manual.

NOTE: The following paragraph describes rebooting the radio. This

action will disrupt the communications link.

Once the image has been verified, the radio must be rebooted using the

new firmware. This is done by entering the command boot 1 or boot 2,

where the 1 or 2 corresponds with the image number used with the iverify

command above.

Once the radio has rebooted and displays the ADAP> prompt again, the

firmware can be downloaded or copied into the other image. Often,

copying the firmware from one image to the other can be faster than per-

forming a second download. To copy the firmware over to the other

image, simply enter icopy. The radio will prompt you for confirmation

(y/n) and then begin copying.

5.2 Reprogramming via a Network Connection

Set Up

Connect the LEDR radio’s ETHERNET NMS connector to a PC via a net-

work connection This can be done in one of three ways: 1) by con-

necting both the radio and the PC to a network hub, 2) by connecting

them directly through an ethernet cross-over cable, or 3) by connecting

them to a common LAN.

If the radio is near the PC, an RS-232 cable can be connected between

them in order to run the console commands. However, if the radio is

some distance away, such as at a remote site, telnet or rlogin can be used

to execute the necessary commands.

Download Procedure

1. Log in to the radio using the login command. Use the ip command to

ensure that the radio has a valid IP address.

2. "Ping" the radio from the PC to ensure that the PC and the radio

have valid routes to pass information between them.

3. Start a TFTP server application on the PC. At the radio’s ADAP>

prompt, start the download by entering reprogram network [filename]

[PC’s IP Address]. The download can be monitored from the radio by

78 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

entering reprogram status. When the download is complete the radio

will emit two short beeps and the response from reprogram status will

indicate that the download has ﬁnished.

SNMP Option The TFTP download process can also be initiated using an SNMP man-

ager. The Firmware|FwProgTable object provides a means for specifying

the TFTP server IP address and the filename for the firmware.

Verification and Reboot

When the download is complete, verify the code and reboot the radio as

described under Verification and Reboot in Paragraph 5.1 above.

6.0 FIELD REPLACEABLE UNITS

The Field Replaceable Units and their part numbers are listed below.

Field servicing or replacement of PC boards and assemblies should be

performed by qualified service personnel.

When ordering parts from the factory, always give the complete model

number of the radio. Refer to the inside rear cover of this guide for con-

tact information.

• Transceiver Main PCB, 400S (P/N 03-3820Axx)

• Transceiver Main PCB, 900S (P/N 03-3810Axx)

• Transceiver Main PCB, 1400S (P/N 03-3830Axx)

• “FT1” Option Board—Non-protected (P/N 03-3846A01)

• “FT1” Option Board—Protected (P/N 03-3539A01)

• Battery for Transceiver’s Backed-up SRAM (P/N 27-3109A01)

• Transceiver Front Panel Assembly (P/N 03-3815A01)

• Transceiver/Protected Sw. Chassis, Base (P/N 03-3810A01)

• Transceiver/Protected Sw. Chassis, Cover (P/N 03-3801A02)

• Duplexer (if equipped)—frequency dependent, contact factory

• Protected Switch Interface Board (P/N 03-3831Axx)

• Protected Switch Ethernet Hub Assy. (P/N 08-3809A01)

• Protected Switch Front Panel Assembly (P/N 03-3855A01)

6.1 Field Installation of FT1 Option Board

Non-protected: 03-3846A01

Protected: 03-3539A01

An “S” Series LEDR radio can be fitted with a Fractional T1 (FT1)

interface board (Figure 20). The addition of an FT1 board enables the

radio to operate with a G.703 interface at speeds up to 768 kbps.

To add the FT1 option board to an existing LEDR II radio, follow these

steps:

1. Remove the top cover of the radio (4 phillips screws).

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 79

2. Locate the installation area for the FT1 option board (see Figure 21).

Remove the three phillips screws on the main PC board which corre-

spond to the mounting holes on the FT1 option board.

3. Install the threaded standoff spacers (furnished with the option

board) onto the main PC board in the holes formerly occupied by the

screws. (Note: Washers must not be used between the standoff spac-

ers and either of the PC boards.)

4. Locate connectors J912 and J913 (see Figure 21). These connectors

mate with the plugs on the bottom of the FT1 option board.

5. Carefully set the option board into place, making sure to align the

mounting holes with the threaded standoffs on the main PCB. (The

FT1 rear panel connector should align with the rectangular cutout at

the radio’s rear panel, and the rear edge of the option board should

be parallel to the main PC board.)

6. Look under the right edge of the FT1 board to ensure that J912 is

aligned with the mating connector on the option board. With the

board properly aligned, push down ﬁrmly in the area directly above

J913 and then over J912 at the edge. A distinct “snapping” action

will be felt as the connectors engage.

7. Install the phillips mounting screws with lockwashers on the top of

the FT1 board.

For protected versions only: Install the plastic clip, if supplied, at the

right rear corner of the FT1 option board. It slips over the edge of

the main PC board and the option board. Gently tighten the hex

screw to secure the clamp.)

8. Re-install the radio’s top cover. This completes the FT1 board instal-

lation.

80 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Invisible place holder

Figure 20. FT1 Option Board—Component Side

(03-3846A01 shown, 03-3539A01 similar)

User Interface

Ports Mates with J912 on

Radio PC Board

Mates with J913 on

Radio PC Board

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 81

Invisible place holder

Figure 21. View of Radio PC Board

Showing Installation Details for FT1 Option Board

J912J913

REAR PANEL OF LEDR RADIO

Installation Area

for FT1 Option Board

PC Board Clamp

(Some Versions)

82 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

7.0 TECHNICAL REFERENCE

7.1 Specifications

General

Frequency Ranges: 330–512 MHz (LEDR 400S)

800 to 960 MHz (LEDR 900S)

1350–1535 MHz (LEDR 1400S)

Frequency Selection: Programmable within each frequency range

RF Occupied Bandwidth: Standard “S” Series radios: 25, 50, 100 and 200

kHz

User Data Rates: Standard “S” Series radios: 64, 128, 256, 384, 512,

768 kbps

With FT1 Option Board: n x 64 kbps

(Where n= 1,2,4,6,12)

Permitted Data Throughput: Standard “S” Series radios:

Channel Size Data Rate

25 kHz 64 kbps

50 kHz 64 kbps to 128 kbps

100 kHz 64 kbps to 256 kbps

200 kHz 64 kbps to 768 kbps

Modulation Type: 32 QAM, 16 QAM, QPSK

Forward Error Correction (FEC): Reed Solomon

Acquisition Time (typical): From power up, 10 seconds

Voltage Range: 24 Vdc or 48 Vdc (±20%)

Power Consumption: Less than 60 watts (non-protected configuration)

Less than 135 watts (protected configuration)

Temperature Range: -5° to 50° C

Humidity: ≤90% non-condensing @ 40° C

Size: 1RU, 19 Inch rack mount compatible

45 mm (1.75 in) high, 1RU

426 mm (16.75 in) wide (excluding rack brackets)

305 mm (12 in) deep

Transmitter

Transmit Power: +30 dBm (1 watt) at antenna port

Output Control Range: 0 dB to -10 dB

Frequency Stability: 1.5 ppm

Spurious Outputs: <-60 dBc (LEDR 400S)

<-60 dBm (LEDR 1400S)

<-60 dBc (LEDR 900S)

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 83

Receiver

Sensitivity (for 10-6 BER): Standard “S” Series radios:

Bandwidth Data Rate Sensitivity

25 kHz 64 kbps -101 dBm

50 kHz 128 kbps -98 dBm

100 kHz 256 kbps -95 dBm

200 kHz 768 kbps -92 dBm

Residual BER:: <1 x 10-10

Dynamic Range: >65 dB

Protected Switch Chassis

Transmitter Coupling Losses

(Typical): 2 dB

Receive Coupling Losses

(Typical): 4 dB (Symmetrical Splitter)

2 dB/10 dB (Asymmetrical Splitter)

Interfaces

Data: EIA-530

With FT1 Option: G.703

Orderwire: 600Ω balanced, DTMF capable

Data Service Channel: RS-232, 9600 bps

Ethernet: 10 Base-T

Console Port: RS-232, 9600 bps to 38.4 kbps

Alarms: 4 programmable outputs, 4 inputs

Antenna: 50Ω Impedance

Network Management

Element Management: Via built-in menu or command line interface

Optional SNMP Management: Using MIB II and custom enterprise MIB

Diagnostic Functions

Local LED Indicators

(front panel): Power, Active, General Alarm, Rx Alarm, Tx Alarm,

I/O Alarm

LCD Display Measurements: RSSI, RF Power, Signal-to-Noise ratio, BER

Loopback: Local and Remote

Agency Approvals (LEDR 400S)

Transmission: FCC Part 90

Environmental: ETS 300 019, Class 3.2

Industry Canada: RS-119

Safety: UL, CSA

EMC: ETS 300 385, FCC Part 15

84 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

:Agency Approvals (LEDR 900S)

Transmission: FCC Part 101

Environmental: ETS 300 019, Class 3.2

Industry Canada: 932 to 944 MHz in Canada

Safety: UL, CSA

EMC: ETS 300 385, FCC Part 15

Agency Approvals (LEDR 1400S)

Transmission: ETS 300 630, MPT 1717

Environmental: ETS 300 019, Class 3.2

EMC: ETS 300 385

Safety: CE Mark

Options (Consult factory for details)

Space Diversity, Hot-standby Protected, Warm-standby Protected, Bandwidth Upgrade

Kits

Accessories

110/240 Vac 50/60 Hz Power Supply, Orderwire Handset

NOTE: The factory reserves the right to make changes to this specification without ad-

vance notice or obligation to any person.

7.2 Pinout Information

Orderwire Invisible place holder

Figure 22. Orderwire Connector

1 2 3 4 5 6

RJ-45

Pin Signal Direction

1 + 12 Vdc Output

2 Ground —

3 Ear –Output

4 Ear + Output

5 Mouth Input

6 Ground —

RJ-11

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 85

Console

Invisible place holder

Figure 23. Console Port DB-9 Female Pinout

Ethernet

Invisible place holder

Figure 24. Ethernet Connector

EIA-530-A Data

Invisible place holder

Figure 25. EIA 530 DB-25 Connector and Similar Data Pinout

234

5NC

RXD (DATA OUT)

TXD (DATA IN)

GROUND

DCE

1 2 3 4 5 6 7 8

RJ-45

10Base-T

Invisible place holder

Pin Signal Direction

1 Ethernet Transmit High Output

2 Ethernet Transmit Low Output

3 Ethernet Receive High Input

4 No Connection —

5 No Connection —

6 Ethernet Receive Low Input

7 No Connection —

8 No Connection —

Clear to Send (B)

Transmit Signal Element Timing (B)

Ext. Transmit Signal Element Timing (B)

Received Line Signal Detector (B)

Receiver Signal Element Timing (B)

Received Line Signal Detector (A)

Signal Ground

DCE Ready (A)

Clear to Send (A)

Request to Send (A)

Received Data (A)

Transmitted Data (A)

Shield

Return

DCE

Common

DCE

DTE

DCE

DTE

Common

Test Mode

Ext. Transmit Signal Element Timing (A)

Common

Remote Loopback

Request to Send (B)

Local Loopback

Receiver Signal Element Timing (A)

Receiver Data (B)

Transmit Signal Element Timing (A)

Transmitted Data (B)

DCE

DTE

Return

DTE

Return

DTE

DCE

Return

DCE

Return

Source Signal

Designation Pin

No. Pin

No. Signal

Designation Source

EIA-530 Interface

86 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

G.703 Data Connectors (4 on rear panel)

Invisible place holder

Figure 26. G.703 Data Connector Pinout

Service Channel Invisible place holder

Figure 27. Service Channel Connector DB-9 Male Pinout

Alarm Invisible place holder

Figure 28. Alarm Connector DB-9 Female Pinout

Pin Signal Direction

1 Differential digital

output signal, ring Output

2 Differential digital

output signal, tip Output

3 No Connection —

4 Differential digital

output signal, ring Input

5 Differential digital

output signal, tip Input

6 No Connection —

7 No Connection —

8 No Connection —

1 2 3 4 5 6 7 8

RJ-45

234

5DCD (IN)

RXD (DATA IN)

TXD (DATA OUT)

DTR (OUT)

DSR (IN)

RTS (OUT)

CTS (IN)

GROUND

DTE

234

5ALARM IN 1

ALARM IN 2

ALARM IN 3

ALARM IN 4

ALARM OUT 1

ALARM OUT 2

ALARM OUT 3

ALARM OUT 4

GROUND

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 87

7.3 RF Propagation Planning

Establishing a reliable point-to-point radio link requires system plan-

ning and design. It is helpful to 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 condi-

tions 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 may be acceptable, but the performance of a blocked path

is always less predictable than a clear path.

Fresnel Zone Clearance

As the distance spanned by a link gets longer, it is necessary to have

more than just a grazing path between 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 29). 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 interference due to reflective and refractive

signal paths. The reflected or refracted signal may arrive at the receiver

out of phase with the desired signal and cause a cancelling effect.

Invisible place holder

Figure 29. Fresnel Zone Obstructions

FRESNEL ZONE

STATION A STATION B

NOT

OBSTRUCTING

OBSTRUCTION

Distance D2

Distance D1

LINE-OF-SIGHT (LOS)

88 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Experience has shown that 60 percent of the first Fresnel zone must be

clear of obstructions (0.6 x F) to allow a clear, unobstructed microwave

path.

Remember, the first Fresnel zone calculation is only one parameter

determining path quality.

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 actu-

ally is. Experience has shown that if we consider the earth’s radius to be

4/3rds of its actual size, we get good agreement between theory and

measured propagation results.

Figure 30 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.

Invisible place holder

Figure 30. Antenna Height vs. Theoretical Radio Horizon

Fade Margins

Variations in the temperature and humidity of the atmosphere with ele-

vation cause the signals to bend more or less, resulting in fading at the

receiver. The longer the path is, the more likely that deep fades will

occur; hence, the greater the fade margin required.

Different parts of the world have differing propagation which can be cat-

egorized 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.

(0)

0(2) (4) (6) (8) (10) (12) (14) (16) (18) (20) (22) (24) (26) (28) (30) (32) (34)

(0)

(50)

(100)

(150)

(200)

(250)

(36)

Radio Horizon Over Level Terrain in Kilometers (Miles)

Normal Conditions

Antenna

Height in

Meters

(Feet)

585552484542393532 292623191610 1363

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 89

Based upon the desired level of link availability, path length, and terrain

type, it is possible to calculate the recommended fade margin.

The following standard formulas are provided for assistance in deter-

mining system installation parameters.

Free Space Path Loss

Where:

αfs = free space loss in dB

d = path distance in kilometers

ƒ = frequency in GHz

Parabolic Antenna Gain

Where:

G = antenna gain in dBi

D = dish diameter in meters

ƒ = frequency in GHz

This formula assumes a typical 50 percent antenna illumination efﬁ-

ciency and is representative of a full parabolic antenna.

Fresnel Zone Boundary

Where:

Fn = Fresnel zone boundary in meters

d1 = distance from one end of the path to the Fresnel zone

boundary in kilometers)

d2 = 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

Parabolic Antenna Beamwidth

αfs 92.4 20 10 flog 20 10dlog++=

G20() 10 7.4Df()log=

Fnnd1d2

⋅()fD()⁄

17.3

φ21.3 fD()⁄=

90 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

Where:

φ = beamwidth in degrees (between –3 dB points)

ƒ = frequency in GHz

D = dish diameter in meters

This formula is representative of a full parabolic antenna.

Theoretical Signal Strength

Where:

RSSI = signal strength at the receiver in dBm

EIRP = RF Power Output in dBm + Gta –Ltﬂ

αfs = free-space path loss in dB

Gra = receive antenna gain in dBi

Lrﬂ = receive feedline loss in dB

Ltﬂ = transmit feedline loss in dB

Gta = transmit antenna gain in dBi

Probability of System Fading

Where:

FProb = probability of fading more than F

a = 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

7.4 Bench Testing of Radios

In some cases, it may be necessary to test the operation of the equipment

in a bench setting. Figure 31 shows a simple arrangement for bench

testing using RF attenuators between the two units under test.

RSSI EIRP α–fs Gra Lrfl

–+=

FProb a b 6.0 10 7– fd

310 F–()10⁄

××××××=

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 91

For weak signal tests (weaker than –80 dBm), additional physical sepa-

ration between radio #1 and radio #2 may be required to prevent unin-

tentional coupling between the radios.

On protected radio configurations, a weak received signal will cause the

transceivers to switch.

Invisible place holder

Figure 31. Back-to-Back Link Test

ANT

Connector ANT

Connector

POWER ATTENUATOR

• 30 dB

• 1W Rating

POWER ATTENUATOR

• 30 dB

• 1W Rating

SWITCHED OR VARIABLE

ATTENUATOR

• 0–110 dB (1 dB Steps)

JFW 50DR-001 or Equivalent

• Required only for receiver sensitivity test.

LOW LOSS COAXIAL LINES

DIGITAL

EQUIPMENT

OR BER

TESTER

RADIO

DATA PORT

TOTAL ATTENUATION

Fixed: 80 dB Minimum for Basic Checks

Adjustable: For Sensitivity Tests (100–140 dB Required)

DIGITAL

EQUIPMENT

OR BER

TESTER

DATA PORT

RADIO

92 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

7.5 Watts dBm Volts conversion

Table 19 is provided as a convenience for determining the equivalent

voltage or wattage of an RF power expressed in dBm.

Invisible place holder

Table 19. 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 05-3627A01, Rev. A LEDR “S” Series I/O Guide 93

GLOSSARY

AMI—Alternate Mark Inversion. A bipolar

format where consecutive marks (ones) have

the polarity inverted. Spaces (ones) are repre-

sented by zero volts. This technique prevents

long sequences of positive or negative volt-

ages.

Analog—Signals with a continuously varying

amplitude, such as the human voice.

BERT—Bit-error rate test. The results of a

BERT are normally expressed as a ratio (power

of 10) of the number of bits received in error

compared to the total number received.

BER—Bit-error rate. See also BERT.

Bit—Binary digit. The smallest unit of digital

data, often represented by a one or a zero. Eight

bits usually comprise a byte.

bps—Bits-per-second. A measure of the infor-

mation transfer rate of digital data across a

communication channel.

Byte—A digital “word” usually made up of

eight bits.

dBi—Decibels of gain relative to an isotropic

radiator. (A hypothetical antenna which radi-

ates equally in all directions.) Used to express

antenna gain.

dBm—Decibels relative to one milliwatt. An

absolute unit used to measure signal power, as

in transmitter power output, or received signal

strength.

DTR—Data Terminal Ready. A control signal

sent from the radio indicating that it is ready to

transmit data.

CPE—Customer premise (provided) equip-

ment.

DCE— Data (circuit terminating) Communi-

cations Equipment. In data communications

terminology, this is the “modem” side of a

computer-to-modem connection. The trans-

ceiver is a DCE device which is designed to

connect to a DTE device.

Decibel (dB)—A measure of the ratio between

two signal levels. Frequently used to express

the gain or loss of a system.

DSP—Digital Signal Processing. A processing

technique that uses software algorithms to

filter, shape, or otherwise modify the character-

istics of a given signal. In the LEDR radio, DSP

is used primarily in modulation and demodula-

tion functions.

E1—An international telephony standard that

operates at 2.048 megabits-per-second (Mbps).

This transmission speed is commonly used

throughout the world except for North America

(which uses T1 1.544 Mbps). Framed E1 con-

sists of 30 digitized telephone channels and two

64 Kbps control channels.

EIRP—Effective Isotropic Radiated Power.

Commonly used to express the power radiated

from a gain antenna. It is equal to the power

transmitted (minus feedline loss) plus the

antenna gain.

ESF—Extended Super Frame.

Fade Margin—The maximum tolerable reduc-

tion in received signal strength which still pro-

vides an acceptable signal quality. This

compensates for reduced signal strength due to

multipath, slight antenna movement or

changing atmospheric losses. Expressed in

decibels.

94 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

FEC—Forward Error Correction. Extra data is

added to the transmitted signal to allow for

detection and correction of some transmission

errors.

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.

Fresnel Zone—A point of maximum width or

girth of the transmitted radio signal. Obstruc-

tions in this region (the “first Fresnel zone”)

can have a detrimental effect on reception

quality. As a general rule, 60 percent of the first

Fresnel zone should be free of obstructions in a

well designed system. (Additional consider-

ations are also required when planning a micro-

wave path.

G.703—The ITU standard defining the charac-

teristics of digital interfaces (pulse shape,

voltage levels, etc.). This applies to high-speed,

three-level data being sent over coaxial or

twisted pair lines.

G.821—The ITU standard by which data trans-

mission quality is measured. The analysis con-

siders available vs. unavailable time.

Half-Power Beamwidth—The customary

way of measuring the width of a directional

antenna’s radiation pattern. This beamwidth is

measured in degrees between the half-power

points (the point at which the power is reduced

3 dB with respect to the main beam).

HDB3—High density bipolar order of 3. A line

interface standard for E1 transmission that

employs coding to eliminate data streams with

four or more consecutive zeros.

IP—Internet Protocol.

ITU—International Telecommunications

Union.

kbps—Kilobits-per-second.

Linecode—Refers to the data coding format

used by the radio for the line interface. (It does

not pertain to the radio’s modulation coding.)

The available linecode selections are HDB3

and AMI.

Mbps—Megabits-per-second.

MIB—Management Information Base. The

MIB stores SNMP messages that are directed to

the management console. This can include

Server events, statistical data and system que-

ries.

Multipath Fading—Signals arriving at the

receiver out of phase which have a tendency to

cancel each other. It is caused by reflections of

the transmitted wave and results in distortion at

the receiver or weak received signal strength.

Multiplexer—A signal processing unit that

combines multiple streams of data into one for

transmission across a single data channel.

NMS—Network Management System. A soft-

ware application used to configure, diagnose

and monitor a communication network. The

LEDR radio’s SNMP program is an example of

an NMS.

Protected Radio—A radio configuration

where there are redundant modules that auto-

matically become active in the event of a

failure.

QAM—Quadrature Amplitude Modulation.

Uses phase shifts and amplitude changes to

send high-speed data in a comparatively

narrow RF channel. See also QPSK.

QPSK—Quadrature Phase Shift Keying. Uses

four levels of phase shift to send high-speed

data with a higher system gain than QAM mod-

ulation. See also QAM.

RSSI—Received signal strength indication.

Expressed in dBm.

MDS 05-3627A01, Rev. A LEDR “S” Series I/O Guide 95

SNMP—Simple Network Management Pro-

tocol. A common network management system

(NMS) protocol used to monitor and control a

communications network

SNR—Signal-to-noise ratio. Expressed in

decibels (dB).

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).

T1—A telephony standard that operates at

1.544 megabits-per-second (Mbps). This trans-

mission speed is commonly used in North

America.

TFTP—Trivial File Transfer Protocol. A stan-

dard network protocol used to send and receive

files between two devices.

96 LEDR “S” Series I/O Guide MDS 05-3627A01, Rev. A

IN CASE OF DIFFICULTY...

Adaptive Broadband Corporation/MDS products are designed for long life and trouble-free oper-

ation. However, this equipment, as with all electronic equipment, may have an occasional compo-

nent failure. The following information will assist you in the event that servicing becomes

necessary.

FACTORY TECHNICAL ASSISTANCE

Technical assistance for Adaptive Broadband/MDS products is available from our Customer

Support Team during business hours (8:00 A.M.–5:30 P.M. Eastern Time). When calling, please

give the complete model number of the radio, along with a description of the trouble symptom(s)

that you are experiencing. In many cases, problems can be resolved over the telephone, without

the need for returning the unit to the factory.

Please use the following telephone numbers for product assistance:

716-242-9600 (Phone)

716-242-9620 (FAX)

FACTORY REPAIRS

Component level repair of radio equipment is not recommended in the field. Many components

are installed using surface mount technology, which requires specialized training and equipment

for proper servicing. For this reason, the equipment should be returned to the factory for any PC

board repairs. The factory is best equipped to diagnose, repair and align your radio to its proper

operating specifications.

If return of the equipment is necessary, you will be issued a Returned Material Authorization

(RMA) number. The RMA number will help expedite the repair so that the equipment can be

repaired and returned to you as quickly as possible. Please be sure to include the RMA number

on the outside of the shipping box, and on any correspondence relating to the repair. No equipment

will be accepted for repair without an RMA number.

A statement should accompany the radio describing, in detail, the trouble symptom(s), and a

description of any associated equipment normally connected to the radio. It is also important to

include the name and telephone number of a person in your organization who can be contacted if

additional information is required.

The radio must be properly packed for return to the factory. The original shipping container and

packaging materials should be used whenever possible. All factory returns should be addressed to:

When repairs have been completed, the equipment will be returned to you by the same shipping

method used to send it to the factory. Please specify if you wish to make different shipping

arrangements.

Adaptive Broadband Corp.

MDS Products Group

Customer Service Department

(RMA No. XXXX)

175 Science Parkway

Rochester, NY 14620 USA

MDS Products Group

175 Science Parkway, Rochester, New York 14620

General Business: +1 (716) 242-9600

FAX: +1 (716) 242-9620

GE MDS LEDR400S LEDR Microwave Radio User Manual 3627A LEDR S body

GE MDS LLC LEDR Microwave Radio 3627A LEDR S body

Contents

Exhibit 22 LEDR 400S Users Manual

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