EMS Wireless DataNex Data-20 User's Reference Manual

Type Acceptance Test Report

Broad Band PCS Transceiver

FCC ID: DNY0A5DATA1900

FCC Rule Part: 24E

ACS Report Number: 03-0096-24TA

Manufacturer: EMS Wireless

Model: DataNex

Installation and Operators Guide

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: [phone]

EMS Wireless

DataNex™

Data-20 Digital Radio

User Reference Manual

2850 Colonnades Court NW
Norcross, GA 30071
Phone: [phone]
Fax: [phone]

Table of Contents ii

Document Number: Rev: A

Last Saved

NXE1 Manual Dwg # ; Revision Levels:

Section Drawing No: REV Revised /

Reason

Released

Data-20 A SN NEW

DataNex EMS Wireless, DATA-20 Digital Radio

iii Table of Contents

WARNINGS, CAUTIONS, AND GENERAL NOTES

This product conforms to FCC Part 15. Changes or modifications not expressly

approved by the party responsible for compliance could void the user's authority to
operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.”

In accordance with FCC regulations regarding human exposure to radiofrequency
energy, this device shall be installed such that a minimum separation distance of 20cm
is maintained between it and general population.

The antennas used for this transmitter must not be co-located or operating in conjunction
with any other antenna or transmitter.

This Class B digital apparatus meets all requirements of the Canadian
Interference Causing Equipment Regulations. Operation is subject to the

following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.

Cet appareillage numérique de la classe B répond à toutes les exigences de
l'interférence canadienne causant des règlements d'équipement. L'opération

est sujette aux deux conditions suivantes: (1) ce dispositif peut ne pas causer
l'interférence nocive, et (2) ce dispositif doit accepter n'importe quelle interférence
reçue, y compris l'interférence qui peut causer l'opération peu désirée.

DataNex EMS Wireless, DATA-20 Digital Radio

Table of Contents iv

Table of Contents

1 SYSTEM DESCRIPTION .......................................................................................................................1-1

1.1

Introduction ..................................................................................................................................................... 1-1

1.2 System Features............................................................................................................................................... 1-1

1.3 Typical Configurations.................................................................................................................................... 1-2

1.3.1 Data Rate and Interface ............................................................................................................................. 1-2

1.3.2 Standalone Operation ................................................................................................................................ 1-2

1.3.3 Hot Standby (Protected) Operation............................................................................................................ 1-3

1.4 Regulatory Notices........................................................................................................................................... 1-3

1.5 System Description (QAM)............................................................................................................................. 1-4

1.5.1 Introduction ............................................................................................................................................... 1-4

1.5.2 QAM Modulator/IF Upconverter............................................................................................................... 1-5

1.5.3 RF Upconverter ......................................................................................................................................... 1-6

1.5.4 Power Amplifier (PA) ............................................................................................................................... 1-7

1.5.5 RF Downconverter .................................................................................................................................... 1-7

1.5.6 QAM Demodulator/IF Downconverter ..................................................................................................... 1-8

2 INSTALLATION .....................................................................................................................................2-1

2.1 Unpacking ........................................................................................................................................................ 2-1

2.2 Notices............................................................................................................................................................... 2-1

2.3 Rack Mount...................................................................................................................................................... 2-2

2.4 Duplexer: Internal/External ........................................................................................................................... 2-2

2.5 Rear Panel Connections & Indicators ........................................................................................................... 2-3

2.6 Power Requirements ....................................................................................................................................... 2-5

2.6.1 Power Supply Card Slot Details ................................................................................................................2-5

2.6.2 AC Line Voltage........................................................................................................................................ 2-5

2.6.3 DC Input Option ........................................................................................................................................ 2-6

2.6.4 Fusing ........................................................................................................................................................ 2-6

2.7 Power-Up Setting............................................................................................................................................. 2-6

2.8 Data Interface .................................................................................................................................................. 2-8

2.8.1 4xE1/T1 MUX Channel Configurations.................................................................................................... 2-8

2.9 Hot Standby (Protected) Configuration ........................................................................................................ 2-9

2.9.1 Hot/Cold Standby Modes ........................................................................................................................ 2-10

2.9.2 Hot Standby Control using the TP64...................................................................................................... 2-11

2.9.3 Hot Standby Control with Single Unit..................................................................................................... 2-14

2.10 Site Installation .............................................................................................................................................. 2-15

2.11 Antenna/Feed System.................................................................................................................................... 2-16

2.11.1 Antenna Installation................................................................................................................................. 2-16

3 FRONT PANEL OPERATION ...............................................................................................................3-1

3.1 Introduction ..................................................................................................................................................... 3-1

3.2 Front Panel Operation .................................................................................................................................... 3-1

3.2.1 LCD Display.............................................................................................................................................. 3-2

3.2.2 Cursor and Screen Control Buttons ........................................................................................................... 3-2

3.2.3 LED Status Indicators................................................................................................................................ 3-3

DataNex EMS Wireless, DATA-20 Digital Radio

v Table of Contents

3.2.4 Screen Menu Tree Structure...................................................................................................................... 3-3

3.3 Main Menu....................................................................................................................................................... 3-4

3.3.1 Launch Screens.......................................................................................................................................... 3-5

3.4 Screen Menu Summaries ................................................................................................................................3-9

3.4.1 Meter ......................................................................................................................................................... 3-9

3.4.2 System: Card View.................................................................................................................................... 3-9

3.4.3 System: Power Supply............................................................................................................................. 3-10

3.4.4 System: Info............................................................................................................................................. 3-10

3.4.5 System: Basic Card Setup........................................................................................................................ 3-11

3.4.6 System: Factory Calibration .................................................................................................................... 3-12

3.4.7 System: Unit-Wide Parameters................................................................................................................ 3-13

3.4.8 System: Date/Time .................................................................................................................................. 3-14

3.4.9 System: Transfer...................................................................................................................................... 3-14

3.4.10 External I/O ............................................................................................................................................. 3-15

3.4.11 Alarms ..................................................................................................................................................... 3-16

3.4.12 Faults ....................................................................................................................................................... 3-17

3.4.13 G821 Parameters...................................................................................................................................... 3-17

3.4.14 QAM Modem Status................................................................................................................................ 3-18

3.4.15 QAM Radio TX Status ............................................................................................................................ 3-21

3.4.16 QAM Radio RX Status............................................................................................................................ 3-22

3.4.17 QAM Radio TX Control.......................................................................................................................... 3-22

3.4.18 QAM Radio RX Control.......................................................................................................................... 3-23

3.4.19 QAM Modem Configure ......................................................................................................................... 3-24

3.4.20 QAM Radio TX Configure...................................................................................................................... 3-30

3.4.21 QAM Radio RX Configure...................................................................................................................... 3-31

3.5 NMS/CPU PC Configuration Software ....................................................................................................... 3-31

3.6 Up/Down Converter: Frequency Adjust...................................................................................................... 3-31

3.6.1 TX Frequency Adjust .............................................................................................................................. 3-31

3.6.2 AFC Level—RX...................................................................................................................................... 3-32

4 DATA INTERFACE CABLES ................................................................................................................4-1

5 APPENDIX .............................................................................................................................................5-1

5.1

Abbreviations & Acronyms ............................................................................................................................ 5-1

5.2 Conversion Chart ............................................................................................................................................ 5-3

DataNex EMS Wireless, DATA-20 Digital Radio

1 System Description

1.1 Introduction

The DATA-20 is a spectrum-scalable point-to-point digital radio that can deliver 8Mbps of data.
Advanced modulation and digital processing techniques allow one radio to deliver user-defined
rates from 512 kbps to 8Mbps

The product is an all-digital, open-architecture, modular system (see Figure 1-1 below). The
versatility and power of the product comes from a complete range of “plug and play” personality
modules.

Figure 1-1. DATA-20 Modular Open Architecture

The high spectral efficiency of the DATA-20 is achieved by user-selectable QPSK, or 16 QAM.
Powerful Reed-Solomon error correction, coupled with a 20-tap adaptive equalizer, provides
unsurpassed signal robustness in hostile RF environments.

1.2 System Features



Selectable Rates: 512 kbps to 8.448 Mbps



Selectable Spectral Efficiency of 1.6 or 3.2 bps/Hz

QPSK & QAM Modulation





Powerful Reed-Solomon Error Correction with up to 12 level interleaver



Built-in Adaptive Equalizer



Internal Duplexer or external for hot standby system



Independent Synthesized Tx & Rx units

System Description 1-2

 Auto / Manual Power Control of up to 20 dB



Built-in Auto Pin Diode Attenuator for powerful signals



Accurate Digital Filtering for adjacent channel rejection



386 Processor-based controller



Extensive LCD screen status monitoring



Built-in BER Meter



Built-in NMS



Monitoring & Time Stamping



Monitor up to 4 external Analog & Digital I/O



Readout of RSL in dBm



Completely modular

1.3 Typical Configurations

1.3.1 Data Rate and Interface

Table 1-1 provides basic data channel capabilities for the DATA-20. See Section 2 (Installation)
for more detailed information.

Table 1-1.DATA-20 Data Channel Configurations

Data Rate MUX Hardware Channels Interface(s)

1.5 Mbps-8 Mbps 2 or 4 x E1/T1 2 or 4 G.703, E1/T1

512 kbps-2 Mbps QAM Modem 1 Fractional E1/T1

512 kbps-2 Mbps QAM Modem 1 V35, RS449

1.3.2 Standalone Operation

The DATA-20 may be used as a standalone digital radio with an interface in the modem or with a
Multiplexer with 2 or 4 E1/T1 interfaces. The Multiplexer has an overhead channel which can be
utilized by the customer

DataNex EMS Wireless, DATA-20 Digital Radio

1-3 System Description

A

A

1.3.3 Hot Standby (Protected) Operation

The product in a hot standby configuration as depicted in Fig.1-2, using two DATA-20 radios and
a TP64 transfer panel.

Data-20 RADIO A

RX

RX RF

SPLITTER

RX

Data-20 RADIO B

TP64 TRANSFER

PANEL

DATA

DATA

TRANSFER

DATA

CNTL

DATA

SWITCH/

LOGIC

CNTL

Figure 1-2. DATA-20 Hot Standby – Two Discrete Radios with Transfer Panel

1.4 Regulatory Notices

TX

TX RF

RELAY

TX

NTENN

DUPLEXER

FCC Part 15 Notice

This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the interference at his expense.
Any external data or audio connection to this equipment must use shielded cables.

DataNex EMS Wireless, DATA-20 Digital Radio

System Description 1-4

1.5 System Description (QAM)

1.5.1 Introduction

The product is a full-duplex digital radio. The following sections describe the TX system, RX
system, followed by sub-system components. Please reference the accompanying block
diagrams for clarification.

We will follow the typical end-to-end progression of a radio system starting with the TX baseband
inputs, to the QAM modulator, followed by the upconversion process and the power amplifier.
We then proceed to the RX preamplifier input, the downconversion process, followed by the QAM
demodulator and baseband outputs.

Antenna

Duplexer

Uni ver sal
Input AC

(DC Optional)

Serial PC Interface

Status/Command/Control I/O

Transfer Panel I/O

RX

TX

+15 VDC

PA Control/

Current

Sense

Power

Supply

RF Linear

PA

+5/+15 VDC

130 Watt

System
Monitor

(A/D)

400 MHz-

1.5 GHz

Back

RF Module

Down Converter

Up Converter

NMS

System CPU

Remot e I/O

Front Panel Inter face

Data, Address, I

Front

Panel

4 x 20 LCD Display

Status LEDs

BarGraph

70 MHz

2

C, SPI Bus

Front Panel

Ribbon Cable

QAM Modem Module

IF Card

Down Converter

Up Converter

12.8 MHz

QAM Modem

Intelligent

MUX

4 Port

Demodulator

Modul ato r

Data/Voice

Interface

Channel 1

Channel 2

Channel 3

Channel 4

Trun k

Figure 1-3. DATA-20 System Block Diagram

.

All modules (excluding the Front Panel and Power Amplifier) are interconnected via the
backplane that traverses the entire width of the unit. The backplane contains the various
communication buses as well as the PA (Power Amplifier) control and redundant transfer
circuitry. The power supply levels and status are monitored on the backplane and the NMS/CPU
card processes the data.

DataNex EMS Wireless, DATA-20 Digital Radio

1-5 System Description

Figure 1-4. Location of theDATA-20Backplane and Power Amplifier

The NMS/CPU card incorporates microprocessor and FPGA logic to configure and monitor the
overall operation of the system via front panel controls, LCD screen menus, status LEDs and the
bar graph display. Module settings are loaded into the installed cards and power-up default
settings are stored in non-volatile memory. LCD screen menu software is uploaded into memory,
providing field upgrade capability. A Windows-based PC interface is available for connection at
the rear panel DATA port.

1.5.2 QAM Modulator/IF Upconverter

TRUNK

I/O

TXD

RXD

IF REF

CLK OUT

IF OUT

LED

STATUS

LEVEL

TRANSLATOR

RS232

TRANSLATOR

IF IN

AGC

INTERLEAVE

RAM

QAM

ENCODER

QAM

DECODER

INTERLEAVE

RAM

NCO

IF

SYNTH

FPGA

FPGA

EEPROM

uC

EEPROM

RATE CONVERTER

PLL FIFO

DIGITAL

POT

STATUS

SPI

DEBUG

OCXO

12.8 MHz

IF

MICRO

CONTROLLER

LEGEND

NO

CONNECTION

uC BUS

REF CLK

DATA & CLK

BUS

I2C IN

BUS

DATA & CLK

OUT

BUS

IN

BUS

REF CLK

OUT

The QAM (Quadrature Amplitude Modulation) Modulator is the transmit portion of the QAM
Modem card. The QAM Modem also houses the IF Up/Down Converter. The QAM Modulator
utilizes the upconverter portion of the IF daughter card.

The QAM Modulator accepts the aggregate data stream via the backplane (see Figure 1-5
above). The module performs modulation at a carrier frequency of 6.4 MHz, adding FEC
(Forward Error Correction) bits while interleaving the blocks of data. The result is a very
spectrally efficient, yet robust linear modulation scheme. This process requires an ultra-stable

DataNex EMS Wireless, DATA-20 Digital Radio

Figure 1-5. QAM Modem Block Diagram

System Description 1-6

master clock provided by an OCXO (oven controlled crystal oscillator) that is accurate to within

0.1 ppm.

IF Input

6.4 MHz

-20 dBm

BPF

6.4 MHz

Synth Level

76.4 MHz PLL

BPF

70 MHz

Loop

Filter

Synth

Lock

VCO

Exciter

Level

IF Output

70 MHz

-10 dBm

Clk

Ref

Data

Enbl

PLL

Figure 1-6. IF Upconverter Block Diagram

The resultant carrier is translated up to 70 MHz by the IF Upconverter (see Figure 1-6). This is
accomplished by a standard mixing of the carrier with a phase-locked LO. A 70 MHz SAW filter
provides an exceptional, spectrally-clean output signal.

1.5.3 RF Upconverter

70 MHz IF

Input

BPF

70 MHz

Diplexer

Synth Level

BPF

RF Output

BPF

Loop

Data

Clk

Enbl

Ref

PLL

Filter

Synth Lock

DataNex EMS Wireless, DATA-20 Digital Radio

TX ALC

VCO

Synth Level

PLL

Synth Lock

Synth Data
Synth Clk

Synth Enbl

uP

IPA Level

RFA Fwd Pwr Level
RFA Rev Pwr Level

Temp Sense
NMS

12.8 MHz Ref Osc

1-7 System Description

Figure 1-7. RF Upconverter Block Diagram

The IF output carrier of the IF Upconverter daughter card is fed to the transmit portion of the RF
Module via an external (rear panel) semi-rigid SMA cable. This module performs the necessary
upconversion to the RF carrier (see Figure 1-7). There is an on-board CPU for independent
control of the critical RF parameters of the system.

Since this is a linear RF processing chain, an automatic leveling control loop (ALC) is
implemented here to maintain maximum available power output (and therefore maximum system
gain). The ALC monitors the PA forward power (FWD) output sample, and controls the
upconverter gain per an algorithm programmed in the CPU. The ALC also controls the power-up
RF conditions of the transmitter output.

1.5.4 Power Amplifier (PA)

The Power Amplifier (PA) is a separate module that is mounted to a heat sink and is fan-cooled
for reliable operation. The PA is a design for maximum linearity in an amplitude modulation­based system.

1.5.5 RF Downconverter

RF Input

BPF Diplexer

Atten

Data

Clk

Enbl

Ref

PLL

RF AGC

Loop

Filter

Synth

Lock

Preamp

ALC

Loop Amp

VCO

PLL

70 MHz

ALC Control

Synth Level

Synth Lock

Synth Data

Synth Clk

Synth Enbl

IF Amp

ALC

Det

IF Output

BPF

70 MHz

uP

70 MHz

to QAM
Demod

NMS

12.8 MHz Ref Osc

Figure 1-8. RF Downconverter Block Diagram

The receiver handles the traditional RF to IF conversion from the carrier to 70 MHz (see Figure 1-

8). Considerations are given to image rejection, intermodulation performance, dynamic range,
agility, and survivability. A separate AGC loop was assigned to the RF front end to prevent
intermodulation and saturation problems associated with reception of high level undesirable

DataNex EMS Wireless, DATA-20 Digital Radio

System Description 1-8

interfering RF signals resulting from RF bandwidth that is much wider than the IF bandwidth. The
linear QAM scheme is fairly intolerant of amplifier overload.

1.5.6 QAM Demodulator/IF Downconverter

IF Input

70 MHz

BPF

70 MHz

BPF

6.4 MHz

IF Output

6.4 MHz

-10dBm

Clk

Data

Enbl

Ref

PLL

Loop

Filter

Synth

Lock

76.4 MHz PLL

Synth Level

AGC Control

VCO

Figure 1-9. IF Downconverter Block Diagram

The QAM (Quadrature Amplitude Modulation) Demodulator is the receive portion of the QAM
Modem card. The QAM Modem also houses the IF Up/Down Converter. The QAM Demod
utilizes the downconverter portion of the IF daughter card.

The IF Downconverter receives the 70 MHz carrier from the receiver portion of the RF Module via
an external semi-rigid cable and directly converts the carrier to 6.4 MHz by mixing with a low­noise phase-locked LO (see Figure 1-9). System selectivity is achieved through the use of a 70
MHz SAW filter.

The QAM Demod receives and demodulates the 6.4 MHz carrier (see Figure 1-7). The
demodulation process includes the FEC implementation and de-interleaving that matches the
QAM modulator in the transmitter, and the critical “data assisted recovery” of the clock. This
process requires an ultra-stable master clock provided by an OCXO (oven controlled crystal
oscillator).

The output is an aggregate data stream that is distributed to the trunk port for if the data
input/output is out of the Modem, or to the backplane for connection to the multiplexer connected
on the backplane.

DataNex EMS Wireless, DATA-20 Digital Radio

2 Installation

2.1 Unpacking

The following is a list of all included items.

Description Quantity

Digital Radio (3RU chassis) 1

Rack Ears (with hardware) 4

Extender Card (Universal QAM) — optional 1

Power Cord (IEC 3 conductor for AC, 2-wire for DC) 2

Manual ( or Soft copy on a CD) 1

Test Data Sheet (customer documentation) 1

Be sure to retain the original boxes and packing material in case of return shipping. Inspect all
items for damage and/or loose parts. Contact the shipping company immediately if anything
appears damaged. If any of the listed parts are missing, call the distributor or the factory
immediately to resolve the problem.

2.2 Notices

CAUTION

DO NOT OPERATE UNITS WITHOUT AN ANTENNA, ATTENUATOR, OR LOAD CONNECTED
TO THE ANTENNA PORT. DAMAGE MAY OCCUR TO THE TRANSMITTER DUE TO
EXCESSIVE REFLECTED RF ENERGY.

ALWAYS ATTENUATE THE SIGNAL INTO THE RECEIVER ANTENNA PORT TO LESS THAN
3000 MICROVOLTS. THIS WILL PREVENT OVERLOAD AND POSSIBLE DAMAGE TO THE
RECEIVER MODULE

WARNING

Installation 2-2

HIGH VOLTAGE IS PRESENT INSIDE THE POWER SUPPLY MODULE WHEN THE UNIT IS
PLUGGED IN. REMOVAL OF THE POWER SUPPLY CAGE WILL EXPOSE THIS POTENTIAL
TO SERVICE PERSONNEL. TO PREVENT ELECTRICAL SHOCK, UNPLUG THE POWER
CABLE BEFORE SERVICING. UNIT SHOULD BE SERVICED BY QUALIFIED PERSONNEL
ONLY.

PRE-INSTALLATION NOTES

Always pre-test the system on the bench in its intended configuration prior to installation at a
remote site. Avoid cable interconnection length in excess of 1 meter in strong RF environments.
We highly recommend installation of lightning protectors to prevent line surges from damaging
expensive components.

2.3 Rack Mount

The product is normally rack-mounted in a standard 19” cabinet. Leave space clear above (or
below) the unit for proper air ventilation of the card cage. The rack ears are typically mounted as
shown in Figure 2-1. Other mounting methods are possible by changing the orientation of the
rack ears.

Figure 2-1.DATA-20 Typical Rack Mount Bracket Installation

2.4 Duplexer: Internal/External

Various duplexers, both internal and external, can be utilized. For current duplexers utilized with
the radios, please see the Appendix.

DataNex EMS Wireless, DATA-20 Digital Radio

2-3 Installation

2.5 Rear Panel Connections & Indicators

Please refer to the Figure 2-2 for a pictorial of a typical product rear panel (internal duplexer).
Following is a descriptive text of the connections and LED indicators.

Figure 2-2.DATA-20 Rear Panel Connections

Power Supply:

Inputs: AC: Universal Input, 100-240V, 50/60 Hz; IEC 3

DC: 24v/48v (Isolated Input); 2 pin socket (custom)

Status LED: +12V: Green LED indicates +12 volt supply OK

+5V: Green LED indicates +5 volt supply OK

NMS Card

I/O Port: RS232 PC access; 9 pin D-sub (female)

Reset Switch: Activates hard system reset

Status LED: Green LED Indicates CPU OK

conductor

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-4

QAM Modem

I/O Ports: TRUNK: Data I/O 15pin D-sub (female) HD

RF
Connectors:

70 MHz
OUT:

70 MHz

IN:

Status LED: MOD: GREEN indicates Modulator Lock

DEMOD: GREEN indicates Demod Lock

Up/Down Converter Module

RF

TO PA: SMA (female), Upconverter output to be applied

Connectors:

70 MHz

IN:

RF IN: SMA (female), Receiver input.

70 MHz

OUT:

SMA (female); Modulator output

SMA (female); Demod input

to linear Power Amplifier module (internal to
radio).

SMA (female), Modulated IF input from QAM
Modulator.

SMA (female); Downconverter output to
Modulator input

Status LED: TX

GREEN indicates TX AFC LOCK

LOCK:

Flashing RED indicates LOSS OF TX LOCK

RX

LOCK:

GREEN indicates RX AFC LOCK and strong RX
signal

YELLOW indicates RX AFC LOCK and nominal
RX signal

RED (continuous) indicates RX AFC LOCK and
weak RX signal

RED (flashing) indicates LOSS OF RX LOCK

DataNex EMS Wireless, DATA-20 Digital Radio

2-5 Installation

RF I/O Panel

RF
Connectors:

PA IN: SMA (female), RF cabling to internal PA

RX OUT: SMA (female), RF cabling from internal

SEMI-RIGID CABLE

Ensure that the cables are secure and tightly attached.

Check for any damage (kinks or breaks in the copper sheath).

ANTENNA: Type N (female), RF cabling from internal PA

module.

module.

duplexer.

2.6 Power Requirements

2.6.1 Power Supply Card Slot Details

The leftmost slot in the DATA-20 card cage (as viewed from the rear of the unit) is designated as
the “PRIMARY A” power supply. The main bus voltages (+5 and +/-12) are summed in the
backplane and provide the supply the plug-in modules.

NOTE: The front panel LCD screen displays the system supply voltages and the

nomenclature follows the physical location of the power supply modules.

2.6.2 AC Line Voltage

The DATA-20 uses a high reliability, universal input switching power supply capable of operating
within an input range of:

100 - 240 VAC; 50/60 Hz

The power supply module is removable from the unit and a perforated cage protects service
personnel from high voltage. The power supply is fan cooled due to high power consumption by
the PA.

CAUTION

High voltage is present when the unit is plugged in. To prevent electrical shock, unplug the power
cable before servicing. Power supply module should be serviced by qualified personnel only.

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-6

2.6.3 DC Input Option

An optional DC input power supply is available for the DATA-20; using high reliability, DC-DC
converter(s) capable of operation within the following input ranges (dependent upon nominal input
rating):

Nominal DC Input Operating Input Range

24 Volt: 20 – 28 VDC

48 Volt: 32 – 64 VDC

The DC input is isolated from chassis ground and can be operated in a positive or negative
ground configuration. The power supply module is removable from the unit and no high voltages
are accessible.

2.6.4 Fusing

For AC modules, the main input fuse is located on the switching power supply mounted to the
carrier PC board and the protective cage may be removed for access to the fuse.

For DC modules, all fusing is located on the carrier PC board.

Always replace any fuse with same type and rating. Other fuses are present on the board, and
are designed for output fail-safe protection of the system. All output fuse values are printed on
the backside of the PC board to aid in replacement.

NOTE: If a fuse does blow in operation, investigate the possible cause of the failure prior to

replacing the fuse, as there is adequate built-in protection margin.

2.7 Power-Up Setting

As shipped, the DATA-20 will radiate into the antenna upon power-up, THIS ASSUMES THAT
THE ANTENNA LOAD IS GOOD (LOW VSWR). If the VSWR of the load causes a high reverse
power indication at the PA, the red VSWR LED will light and the transmitter will cease radiating.
This is called the “AUTO” setting in the QAM RADIO CONTROL screen (see below).

The LCD screen (“QAM RADIO TX CONTROL”) selects the power-up state and controls the
radiate function of the TX unit.

Go to the MAIN MENU:

DataNex EMS Wireless, DATA-20 Digital Radio

2-7 Installation

Data-20 Main Menu

METER
QAM RADIO
SYSTEM

ALARMS/FAULTS

Scroll

Scroll to QAM Radio, press ENTER.

Select Launch Screen for CONTROL TX, press ENTER:

QAM Radio Launch

CONTROL
TXA

QAM Radio TX Control

Verify the AUTO setting.

AUTO: Transmitter will protect its PA by “folding back” the ALC under bad

ON: Transmitter will remain in radiate at full power under all antenna

OFF: Transmitter in standby mode.

TX Radiate

AUTO

load VSWR condition (default setting)

port conditions (not recommended).

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-8

2.8 Data Interface

2.8.1 4xE1/T1 MUX Channel Configurations

Trunk I/O Async Data Channel

Channel 3/4 (E1/T1)Channel 1/2 (E1/T1)

Aux Channel 1 Aux Channel 2

EMS

Figure 2-3. 4XE1/T1 MUX Panel

The 4xE1/T1 MUX is a high speed card (up to 8 MBPS) that has a total of 7 ports. Table 2-1
summarizes the capabilities.

DataNex EMS Wireless, DATA-20 Digital Radio

2-9 Installation

Table 2-1.DATA-20 4xE1/T1 MUX Data Channel Configurations

Chnl Data

Rate

4xE1

(BPS)

1 2.048 K 1.544 K 2.048 K 1.544 K 2.048 K 1.544 K G.703,

2 2.048 K 1.544 K 2.048 K 1.544 K --- --- G.703,

3 2.048 K 1.544 K --- --- --- --- G.703,

4 2.048 K 1.544 K --- --- --- --- G.703,

* Aux1 128 K 96 K 64 K 48 K 32 K 24 K V.35,

* Aux2 128 K 96 K 64 K 48 K 32 K 24 K V.35,

ASYNC

Data

9600 7200 4800 3600 2400 1800 RS232

Data
Rate

4xT1

(BPS)

Data
Rate

2xE1

(BPS)

Data
Rate
2xT1

(BPS)

Data
Rate

1xE1

(BPS)

Data
Rate
1xT1

(BPS)

Inter­face

DSX-1

DSX-1

DSX-1

DSX-1

RS449

RS449

* AUX Channels 1-2 can be combined to form 2xCh.1 or 2xCh.2 (i.e., in 4xE1 mode, AUX could
be a single channel of 256 KBPS)

2.9 Hot Standby (Protected) Configuration

The DATA-20 may be installed in a hot standby (protected) configuration. This consists of
twoDATA-20 chassis with a TP64 transfer panel (Figure 2-5)

Transfer Panel Connection

The usual hot standby configuration uses an external duplexer. This minimizes RF losses and
provides independent TX and RX module switching. A duplexer should already be mounted on
the TP64 chassis. Alternatively, rack mounted duplexers (typical for tighter channel spacings)
may be provided. The connections are the same, although the physical location is different.

A power divider (used to split the signal equally to two receivers) is required in this mode. The
input to the power divider connects directly to the duplexer with an N-N (male) adapter.

See Figure 2-4 for installation details.

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-10

A

NTENNA

DATA-20 Radio A

DATA

DATA

TP64 Rear Panel

Data-20 Radio B

RJ45

RJ45

DATA

Figure 2-4.DATA-20 Hot Standby – with Transfer Panel

TP64 Top View

2.9.1 Hot/Cold Standby Modes

Hot Standby ( *preferred)

Hot standby leaves both transmitters in the RADIATE ON condition, and the transfer logic
controls the RF relay to select the active transmitter, thereby decreasing switchover time. This is
the preferred operating mode.

Cold Standby

Cold standby can be used in situations where lower power consumption is a priority. In this
mode, the transfer logic will control the RADIATE function of each transmitter, turning the RF

DataNex EMS Wireless, DATA-20 Digital Radio

2-11 Installation

output ON (in tandem with the RF relay) as required for switching. This will increase switching
time and a corresponding increase in data loss during the switchover.

2.9.2 Hot Standby Control using the TP64

2.9.2.1 TP64 Front Panel Controls and Indicators

Note: See the following section for a detailed description of the Master/Slave logic implemented

in the TP64.

DataNex

Figure 2-5. TP64 Front Panel

LED Indicators

Green: The indicated module is active, and that the module is performing within

its specified limits.

Yellow: The indicated module is in standby mode, ready and able for back-up

transfer.

Red: There is a fault with the corresponding module. It is not ready for

backup, and the TP64 will not transfer to that module.

TRANSFER Switches

The RADIO A and RADIO B transfer switches cause the selected radio to become active, and the
Master. See Section 3.4 (following) for further details.

2.9.2.2 Master/Slave Operation & LED Status

The TP64 operates in a Master/Slave logic mode. In the power up condition, the Master is
RADIO A. This means that RADIO A is the default active unit. The following logic applies to hot
or cold standby, external or internal duplexer configurations.

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-12

Table 2-3. TP64 Transmitter Master/Slave Logic

Selected

Master

A OK OK GRN YEL A A
A OK FAIL GRN RED A A
A FAIL OK RED GRN B B

Logic

A-Master

B-Master

A FAIL FAIL RED RED N/A A
B OK OK YEL GRN B B
B OK FAIL GRN RED A A
B FAIL OK RED GRN B B

Logic

B FAIL FAIL RED RED N/A B

Selected

Master

A OK OK GRN YEL A A
A OK FAIL GRN RED A A
A FAIL OK RED GRN B B

Logic

A-Master

B-Master

A FAIL FAIL RED RED N/A None
B OK OK YEL GRN B B
B OK FAIL GRN RED A A
B FAIL OK RED GRN B B

Logic

B FAIL FAIL RED RED N/A None

TXA

Status

TXB

Status

TXA
LED

TXB
LED

Active TX TX Relay

Table 2-4. TP64 Receiver Master/Slave Logic

RXA

Status

RXB

Status

RXA

LED

RXB
LED

Active RX RX Data &

Position

Clk

A-Master Logic (default power-up):

If RADIO A is “good”, the TP64 will remain in RADIO A position, regardless of RADIO B’s status.

If RADIO A fails, the TP64 will switch to RADIO B (assuming that RADIO B is “good”)

If RADIO A then returns to a “good” condition, the TP64 will switch back to RADIO A (the default
Master)

Manual Switchover to B-Master Logic

The front panel switch on the TP64 can be used to manually force the system to a new Master.

By pressing the RADIO B button, RADIO B now becomes the Master, and the TP64 will
switchover to RADIO B (assuming that RADIO B is “good”).

The default A-Master Logic will then switch to B-Master Logic, as outlined in Tables 2-3 and 2-4.

DataNex EMS Wireless, DATA-20 Digital Radio

2-13 Installation

Note: Manual switching of the Master is often used to force the system over to the standby unit.

The user may want to put more “time” on the standby unit after an extended period of
service. In Hot Standby configurations, this will not buy the user anything in terms of
reliability. In Cold Standby, the “burn time“ is more significant, since the RF power
amplifier device operating life becomes a factor.

2.9.2.3 DATA-20 Software Settings

The full array of available settings for the Control and Configuration menus are located in Section
3—Operation of the Front Panel. Shown here are the applicable settings for redundant standby
systems.

Clock Settings

For proper operation, the clock settings (located in the QAM Radio/Config/Modem Menu) must be
set as follows:

QAM Interface

Intfc

Tx In Clock

Clk Phase

Rx Clock Out

Clk Phase

Trunk Out

Clk Source
Clk Phase

TRUNK

INVERTED

NORMAL

EXTERNAL
NORMAL

Control Settings

These settings configure the transmitter for hot (or cold) standby.

It is important that each DATA-20 radio in the redundant pair is configured identically for proper
operation.

In the SYSTEM TRANSFER menu:

DataNex EMS Wireless, DATA-20 Digital Radio

Transfer

Tx Transfer
Rx Transfer

______
______

Installation 2-14

Tx Transfer:

OFF: Turns Transmitter Transfer Mode OFF.

Rx Transfer:

OFF: Indicates the receivers are not switched.

In the QAM Radio TX Control menu:

QAM Radio Tx Control

TX Radiate

______

Tx Radiate:

ON: Configures the Transmitter to always RADIATE.

2.9.2.4 TP64 Settings

The TP64 software settings are contained in the internal firmware. Aside from the front panel
RADIO A/B Master Select (as described above), there are no user-configurable settings in the
TP64 unit.

2.9.3 Hot Standby Control with Single Unit

2.9.3.1 DATA-20 Software Settings

The full array of available settings for the Control and Configuration menus are located in Section
3—Operations. Shown here are the applicable settings for single systems.

Clock Settings

All controls and indications can be found on the DATA-20 front panel LCD display (located in the
QAM Radio/Config/ModA or ModB Menu).

Control Settings

These settings configure the transmitter for hot (or cold) standby.

DataNex EMS Wireless, DATA-20 Digital Radio

QAM Interface

Intfc

Clk Phase

RADIO(BKPLN)

Tx In Clock

NORMAL

2-15 Installation

It is important that each DATA-20 radio in the redundant pair is configured identically for proper
operation.

In the SYSTEM TRANSFER menu:

Transfer

Tx Transfer:

HOT: Configures the Transmitter for HOT STANDBY

operation.*(preferred)

COLD: Configures the Transmitter for COLD STANDBY operation.

Rx Transfer:

ON: Places the receivers in both active and transfer mode.

In the QAM Radio TX Control menu:

Tx Radiate:

AUTO: Software controls the RADIATE function.

Tx Transfer
Rx Transfer

QAM Radio Tx Control

TX Radiate

______
______

______

2.10 Site Installation

The installation of the DATA-20 involves several considerations. A proper installation is usually
preceded by a pre-installation site survey of the facilities. The purpose of this survey is to
familiarize the customer with the basic requirements needed for the installation to go smoothly.
The following are some considerations to be addressed (refer to Figure 2-8 for Site Installation
Details).

Before taking the product to the installation site verify that the interface connections are
compatible with the equipment to be connected. Also, locate the information provided by the path
analysis that should have been performed before ordering the equipment. At the installation site,
particular care should be taken in locating the product in an area where it is protected from the
weather and as close to the antenna as possible. Locate the power source and verify that it is
suitable for proper installation.

The installations should only be performed by qualified technical personnel
only.

DataNex EMS Wireless, DATA-20 Digital Radio

Installation 2-16

2.11 Antenna/Feed System

2.11.1 Antenna Installation

For compliance with FCC RF Exposure requirements the following has to be adhered to:-

1. All antenna installation and servicing is to be performed by qualified technical personnel
only. When servicing the antenna, or working at distances closer than those noted below,
ensure the transmitter has be disabled.

2. Typically, the antenna connected to the transmitter is a directional (high gain) antenna,
fixed-mounted on the side or top of a building, or on a tower. Depending upon the
application and the gain of the antenna, the total composite power could exceed 20 to
61watts EIRP. The antenna location should be such that only qualified technical
personnel can access it, and that under normal operating conditions the antenna
separation from the user is required to be located at the distance of 3.5meters or more.

EIRP at the antenna is calculated as follows:-

Transmit power – Cable loss + Antenna Gain = EIRP

Eg.

+31.1dBm – 6dB(for 100m LDF5-50A) +36dBi = 61.1Bmi

DataNex EMS Wireless, DATA-20 Digital Radio

3 Front Panel Operation

3.1 Introduction

This section describes the front panel operation of the DATA-20 digital radio/modem. This
includes:

• LCD display (including all screen menus)

• Cursor and screen control buttons

• LED status indicators

3.2 Front Panel Operation

A picture of the DATA-20 front panel is depicted in Figure 3-1 below.

Front Panel Operation 3-2

Figure 3-1.DATA-20 Front Panel

3.2.1 LCD Display

The Liquid Crystal Display (LCD) on the DATA-20 front panel is the primary user interface and
provides status, control, configuration, and calibration functionality. The menu navigation and
various screens are explained in detail later in this section.

Backlight:

An automatic backlight is built-in to the LCD for better clarity under low-light conditions. This
backlight is enabled on power-up and will automatically turn off if there is no button activity by the
user. The backlight will automatically turn on as soon as any button is pressed.

Contrast Adjustment:

Internal adjustment on board (in back of front panel button PCB).

3.2.2 Cursor and Screen Control Buttons

The buttons on theDATA-20 front panel are used for LCD screen interface and control functions:

ENT

ESC

<ENTER> Used to accept an entry (such as a value,

a condition, or a menu choice).

<ESC> Used to “back up” a level in the menu

structure without saving any current
changes.

<UP>,<DOWN> Used in most cases to move between the

menu items. If there is another menu in
the sequence when the bottom of a menu
is reached, the display will automatically
scroll to that menu.

DataNex EMS Wireless, DATA-20 Digital Radio

<LEFT>,<RIGHT> Used to select between conditions (such

as ON/OFF, ENABLED/DISABLED,
LOW/HIGH, etc.) as well as to increase or
decrease numerical values.

3-3 Front Panel Operation

3.2.3 LED Status Indicators

Table 3-1. LED Status Indicator Functions

LED Name Function

RX Receiver Green indicates that the receiver is enabled, the

synthesizer is phase-locked, and a signal is
being received.

RXD Receive Data Green indicates that valid data is being received.

BER Bit Error Rate Flashes red for each data error detected.

FLT Fault General fault light (red). Consult the STATUS

menus for out of tolerance conditions.

LBK Loopback Red indicates analog or digital loopback is

enabled.

TXD Transmit Data Green indicates the modem clock is phase-

locked and data is being sent.

TX Transmitter Green indicates the transmitter is radiating, and

the RF output (forward power) is above the
factory-set threshold.

3.2.4 Screen Menu Tree Structure

Figures 3-2a, b and c, located on pages 3-7, 3-8, 3-9 and 3-10, show the tree structure of the
screen menu system. The figures group the screens into functional sets. There may be minor
differences in the purchased unit, due to software enhancements and revisions. The current
software revision may be noted in the SYSTEM sub-menu (under INFO).

In general, <ENTER> will take you to the next screen from a menu choice, <UP> or <DOWN> will
scroll through screens within a menu choice, and <ESC> will take you back up one menu level.
Certain configuration screens have exceptions to this rule, and are noted later in this section.

CAUTION

DO NOT change any settings in the CONFIGURE or CALIBRATE screens. The
security lock-out features of the software may not be fully implemented, and
changing a setting will most likely render the system non-operational!

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-4

3.3 Main Menu

The main menu appears on system boot-up, and is the starting point for all screen navigation.
Unlike most other screens in the software, the main menu scrolls up or down, one line item at a
time.

Data-20 MAIN MENU

METER
QAM RADIO

SYSTEM

ALARMS/FAULTS

Scroll

DataNex EMS Wireless, DATA-20 Digital Radio

3-5 Front Panel Operation

3.3.1 Launch Screens

The LAUNCH screen allows the user to quickly get to a particular screen within a functional
grouping in the unit. The logic is slightly different than other screens. Figure 3-2 below contains
a “Launch Screen Navigation Guide” to assist the user in locating the desired Radio screen.

Data-20 MAIN MENU

METER
QAM RADIO

ENT

Cycle through STATUS, CONTROL,
CONFIGURE choices:

QAM Radio Launch

STATUS
MODEM

Move cursor to
next line

SYSTEM

ALARMS/FAULTS

QAM Radio Launch

CONTROL
MODEM

Scroll

QAM Radio Launch

CONFIGURE
MODEM

Cycle through MODEM,
TX, RX choices:

QAM Radio Launch

STATUS
MODEM

Figure 3-2. Launch Screen Navigation Guide

QAM Radio Launch

STATUS
TX

TX STATUS chosen,

ENT

press ENTER to view.

QAM Radio TX Status

FreqA

MHz

Page down/up with
down or up arrow.

More Screens

(see Menu Flow

Diagram)

Press ESCAPE to return to

ESC

previous levels.

QAM Radio Launch

STATUS

RX

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-6

This page is intentionally blank.

DataNex EMS Wireless, DATA-20 Digital Radio

3-7 Front Panel Operation

DataNex EMS Wireless,

DATA-20 Digital Radio

Power Supply

Primar

y

+5VD
+15VD

AC

5.00

V

15.00

V

AUDIO DEC

CARD ID

Chnl Cd

MU

X

MUX0
CHC1

Basic Card Setup

QAM Mode

m

RF Tx

QMA
TXA

CARD ID

Factory Cali brate

RADIO RX
QAM Mode

m

RADIO TXSyste

m

CARD ID

AUDIO ENC

RF R

X

RXA
ENC1
DEC1

AUDIO DEC

(see Factor

y

Calibration

submenu)

System Information

SECURITY
FIRMWARE

USE

R

Vx.xx

METE R

Meter
Bargraph DECDR 1
Backlight AUTO
Led DSP

A

System Date

Month
Year

Da

y

29

00

06

System Time

Minutes
Seconds

Hour 15

48

35

A

LARMS/FAUL

T

Alarm(s)

Total Alarms Since

Reset-1

ALARMS - A
FAULTS - A
ALARMS - B
FAULTS - B

Fault(s)

Alarm(s)

Rev Pwr > 0.25

W

15:20:24 6/29/00

Total Faults Since

Reset-1

Figure 3-2a

LCD SCREEN MENU

Figure 3-2a

LCD SCREEN MENU

M

ETER

QAM RADIO

Data-20 M AIN

SYSTEM

A

LARMS/FAULTS

Sc
roll

Fault(s)

Fwd Pwr < 0.5

W

15:18:43 6/29/00

SYSTEM

CARD VIE

W

POWER SUPPLY
INFO

Syste

m

FACTORY CAL

Sc

r

oll

BASIC CARD SETUP

UNIT-WIDE PA RAMS

Meter, System,

Transf er

Tx Transfer OFF
Rx Transfer OFF

Ext A/D Readin gs
#1- 0.56 #2- 0.00
#3- 0.00 #4- 0.00

Ext A/D Readin gs

#1 #2 #3 #4

O

FF OFF OFF OFF

Ext Relays

RELAY CONTRO LS
MAP FAULTS-R ELAYS

Ext D/A

O

utput RX SIG LVL

Control Relays
#1- OFF #2- ON
#3- OFF #4- ON

Faults

Map to Relays? O

N

Parameter Va lue
Unit No. 1
Main Title NXE1
Redundant O

N

IP MSB 207
IP 71
IP 217
IP LSB 191

SNMP MSB 255
SNMP 255
SNMP 255
SNMP LSB 0

GW MSB 207
G

W

71

G

W

217

GW LSB 191

DATE/TIME
TRANSFE

R

EXTERNAL I /O

**Note:

"A" module and "Primary" screens
are th e default.

"B" module and "Secondary"
calibrati ons are available only when
redundant systems are configured.

Cards Active B.Addr

DECDR 1 1

Cards Active B.Addr
QAMOD

A

1

RF TX

A

1

RF RX

A

1

Cards Active B.Addr
MUX 0 0
CH CD 1 0
ENCDR 1 1

CALC BER ALWAYS
RMT/LOC LOC

3-8 Front Panel Operation

DataNex EMS Wireless, DATA-20 Digital Radio

Factory Calibration

RADIO TX-A CAL
AFC LVL
LO LVL

QAM MODEM-B CAL

RADIO TX CAL

UNIT A
UNIT B

QAM MODEM CAL

UNIT A
UNIT B

FWD PWR-A Calibr

Cal Value

190 27

-9999.00

Pwr Adjust
Reading 1.00

10.00 A

1.72 A

RADIO TX-A CAL

FWD PWR
REV PWR

PA CUR

ALC

RADIO TX-B CAL
FWD PWR
REV PWR

PA CUR

ALC

RADIO TX-B CAL

AFC LVL
LO LVL

PA Current-A Calib

Cal Value

Reading

ALC-A Calibr

PA ALC AUTO

REV PWR-A Calibr

Cal Value

0.25 W

Reading

XCTR LVL-A Calibr

Cal Value

100 %
100 %

Reading

LO LVL-A Calibr

Cal Value

100 %

52.94 %

Reading

AFC LVL-A Calibr

Calibr Val

4.50

0.85

Reading

SYSTEM CAL

15V-RFA

+15VA

+5VD

BATT

O

CXO

AFC LVL

MOD LVL

SYNTH LVL

O

CXO-A Cal

Mode

194
SLAVE

Freq Adj

Synth Lvl-A Cal

Cal Value

100.0

96.00

Reading

Mod Lvl-A Cal

Cal Value

100.00

95.96

Reading

AFC Lvl-A CAL

Cal Value

4.50

3.67

Reading

O

CXO-B Cal

Mode

194
SLAVE

Freq Adj

Synth Lvl-B Cal

Cal Value

100.0

96.00

Reading

Mod Lvl-B Cal

Cal Value

100.00

95.96

Reading

AFC Lvl-B CAL

Cal Value

4.50

3.67

Reading

QAM MODEM-A CAL

Figure 4-2c

SL9003Q SCREEN MENU TREE

Figure 4-2c

SL9003Q SCREEN MENU TREE

O

CXO

AFC LVL

MOD LVL

SYNTH LVL

Note: "B" Module and "Secondary" calibrations are available only when
redundant systems are configured.

"A" module and "Primary" screens are the default.

M

ETER

QAM RADIO

Data-20 MAIN MENU

SYSTEM

A

LARMS/FAULTS

Scr
oll

Factory Calibrate
RADIO TX
RADIO RX
QAM MODEM

SYSTEM

RADIO RX-A CAL
RSL
AFC LVL
LO LVL

LO LVL-A CAL

Calibr Val

100

Reading

4.05

AFC LVL-A CAL

Calibr Val

4.50

Reading

4.05

RSL-A CAL

RADIO RX CAL

UNIT A
UNIT B

RADIO RX-B CAL
RSL
AFC LVL
LO LVL

Calibr Val

-50.00

Hi Reading

0.00

LO LVL-B CAL

Calibr Val

100

Reading

4.05

AFC LVL-B CAL

Calibr Val

4.50

Reading

4.05

XCTR LVL

-9999.00

2.40

0.00

FWD PWR-B Calibr

Cal Value

190 27

-9999.00

Pwr Adjust
Reading 1.00

10.00 A

1.72 A

PA Current-B Calib

Cal Value

Reading

ALC-B Calibr

PA ALC AUTO

REV PWR-B Calibr

Cal Value

0.25 W

Reading

XCTR LVL-B Calibr

Cal Value

100 %
100 %

Reading

LO LVL-B Calibr

Cal Value

100 %

52.94 %

Reading

AFC LVL-B Calibr

Calibr Val

4.50

0.85

Reading

-9999.00

2.40

0.00

XCTR LVL

cw

O

FF cw

O

FF

-70.00

Lo Reading

RSL-B CAL

Calibr Val

-50.00

Hi Reading

0.00

-70.00

Lo Reading

System Cal

EXTERNAL ANALOG

#1 #2 #3 #4

15V-RFA-Prim. Calib

Reading 15.00
Calibr Val 14.50

Battery-Prim. Calib

Reading 15.00
Calibr Val 14.50

+5VD Calib

Reading 15.00
Calibr Val-9999.00

+15VA Calib

Reading 15.00
Calibr Val 14.50

Extern A/D 1 Calib

Reading 15.00
Calibr Val 12.00

Extern A/D 2 Calib

Reading 15.00
Calibr Val 12.00

Extern A/D 3 Calib

Reading 15.00
Calibr Val 12.00

Extern A/D 4 Calib

Reading 15.00
Calibr Val 12.00

CARD VIEW
POWER SUPPLY
INFO

System

FACTORY CAL

Scr
oll

BASIC CARD SETUP

DATE/TIME
TRANSFER
EXTERNAL I/O

Figure 3-2d

LCD SCREEN MENU TREE

3-9 Front Panel Operation

3.4 Screen Menu Summaries

The following tables and text provide a screen view for that topic as well as the functions and
settings of that screen. The order follows the Screen Menu Tree (Figures 3-2a and 4-2d) with the
exception of the QAM Radio screens, which are grouped in the STATUS, CONTROL and
CONFIGURE categories.

3.4.1 Meter

Meter

DECDR 1 Bargraph

Led Dsp A

Function Settings Summary

Bargraph ENCDR1, 2, etc…

DECDR1, 2, etc…
NONE

Led Dsp A

B

Selects the desired audio source for display on the audio
level bargraph
Turns off the bargraph

The status of Radio A or Radio B is displayed on the
LEDs on the front panel.

3.4.2 System: Card View

Cards Active B.Addr

QAMOD A
RF TX A
RF RX A

Cards Active B.Addr
MUX 0
CH CD 1

ENCDR 1

Cards Active B.Addr

DECDR 1

1
1
1

0
0
1

1

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-10

Function Settings Summary

Cards Active RF RX A

DECDR 1
ENCDR 1
QAMOD A

RF TX A

MUX 0
CH CD 1

Note: The card view screen gives the user a list of all installed cards in the unit. The base
address (B. Addr) is listed for diagnostic purposes only.

QAM Receiver RF Module installed in QAM Radio “A”
slots (base address 0)
Audio Decoder #1 installed (base address 1)

Audio Encoder #1 installed (base address 2)
QAM Modem Module installed in QAM Radio “A” slots

(base address 3)
QAM Transmitter RF Module installed in QAM “A” slots

(base address 4)
Intelligent Multiplexer #0 installed (base address 5)

3.4.3 System: Power Supply

Power Supply Status
Primary

+5VD
+15VD

Function Settings Summary

Primary

AC
DC

+5 VD 0-9.99 V

5.20 V nominal

+15 VD 0-99.9 V

15.2 V nominal

Indicates type of supply in primary slot A:
Universal AC input
DC Option
Voltage level of the main +5 volt supply

Voltage level of the main +15 volt supply

AC

5.00 V

15.00 V

3.4.4 System: Info

System Information
Unit No.
Security

Firmware

Function Settings Summary

Unit No. 1,2,3,… Identification for NMS system
SECURITY

Lockout
User (default)
Factory

FIRMWARE V x.xx Revision of front panel screen menu software

DataNex EMS Wireless, DATA-20 Digital Radio

Indicates access level of security:
No control available
Limited control of parameters
Full configure and calibration

1
USER

V.2.04

3-11 Front Panel Operation

3.4.5 System: Basic Card Setup

Basic Card Setup

Card

QAM Modem
RF Tx

Id
QMA

TXA

Card

RF Rx
Audio Enc

Audio Dec

Card

Id

RXA
ENC1
DEC1

Id

MUX MUX0
Chnl Cd

CHC1

Function Settings Summary

QAM Modem QMA, QMB QAM Modem installed in QAM Radio slots A or B
RF Tx TXA, TXB QAM Transmitter installed in QAM Radio slots A or B
RF Rx RXA, RXB QAM Receiver installed in QAM Radio slots A or B
Audio Enc ENC1,2,… Audio Encoder installed and identified (affects meter

selection of bargraph)

Audio Dec DEC1,2,… Audio Decoder installed and identified (affects meter

selection of bargraph)
MUX MUX 0,1,… Mux Module installed and identified
Chnl Cd CHC 1,2,… Channel Card installed and identified

Note: These are factory settings of installed cards, used to control appropriate displays in the
CARD VIEW screens.

Note: Pressing enter at each ID type brings up another screen with the Card Function shown
and the question: In System? Is displayed. Depending upon the card type, this screen also
indicates the base address. These windows are shown below:

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-12

QAM Modem A

In system? YES

Radio TX A

In system? YES

Radio RX A

In system? YES

Encoder 1

In system? YES

Base addr 1

Decoder 1

In system? YES

Base addr 1

In system? YES

Mux 0

Chnl Base Addr 0
Hooked to Radio

Mux 0

Channel Types
1 NONE
2 NONE

NO

3 NONE
4 NONE

Channel Card 1

In system? YES

Base addr 0

Channel Card 1

Channel Types
1 NONE
2 NONE

3 NONE
4 NONE

3.4.6 System: Factory Calibration

Factory Calibrate

RADIO TX System

RADIO RX
QAM Modem

The Factory Calibration Screens are documented in Figure 3-2 (Screen Menu Tree). The user
may refer to this diagram when instructed to do so by customer service technicians.

DataNex EMS Wireless, DATA-20 Digital Radio

3-13 Front Panel Operation

3.4.7 System: Unit-Wide Parameters

Parameter

Value

Unit No. 1
Main Title

Redundant

NXE1
ON

IP MSB 207
IP 71
IP 237
IP LSB 115

SNM MSB 255
SNM 255
SNM 255
SNM LSB 0

GW MSB 207
GW 71
GW 237
GW LSB 254

Calc BER always

RMT/LOC LOC

Function Settings Summary

Unit No. 1,2,3,… Identification for NMS system
Main Title TRANSMITTER,

RECEIVER,

Determines main menu display and affects screen menu
selection of modules

TRANSCEIVER
T1
DTV Link
NXE1

Redundant ON

OFF

Hot Standby Dual Radio operation.
Single Radio operation.

IP Integer (0-255) Internet Protocol (IP) address of the device. These

values must be set for the device to possess network
capabilities.

SNM Integer Subnet Mask of the device. Only needs to be set if the

device is to use its network capabilities. Subnetting
allows network administrators additional flexibility in
defining relationships among network hosts.

GW Integer The default Gateway of the device. The Gateway

address is configured by the network administrator. This
address informs each device where to send data if the
target station does not reside on the same subnet as the
source.

Calc BER
always

RMT
LOC

(Remote) Use RMT only in SNMP mode.
(Local) Put in local.

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-14

3.4.8 System: Date/Time

System Date

Day 29
Month
Year

System Time

Hour 15
Minute
Second

06
98

35
48

Function Settings Summary

Day
Month
Year
Hour
Minute
Second

01-31
01-12
00-99
00-23
00-59
00-59

Sets the system date used for NMS and Fault/Alarm
logging
After selection, press ENTER to save

Sets the system time used for NMS and Fault/Alarm
logging
After selection, press ENTER to save

3.4.9 System: Transfer

Transfer

Tx Transfer
Rx Transfer

Function Settings Summary

TX Transfer OFF

HOT

Configures the internal logic for transfer panel (TP64) TX
control

COLD

RX Transfer OFF

ON

Configures the internal logic for transfer panel (TP64) RX
control

OFF

OFF

DataNex EMS Wireless, DATA-20 Digital Radio

3-15 Front Panel Operation

3.4.10 External I/O

Ext A/D Readings

#1­#3-

0.56

0.00

#2­#4-

0.00

0.00

Ext Status Readings

#1
OFF

OFF

#3#2#4

OFF

OFF

Control Relays

Ext Relays

#1­#3-

OFF
OFF

#2­#4-

ON
ON

RELAY CONTROLS
MAP FAULTS-RELAYS

Faults

Map to Relays?

Ext D/A

Output

RX SIG LVL

Function Settings Summary

Ext A/D

#1, #2, #3, #4 Voltage readings via the NMS I/O card
Readings
Ext Status

#1, #2, #3, #4 Logic Level readings via the NMS I/O card
Readings
Ext Relays #1, #2, #3, #4 Control of relays at the NMS I/O card
Map Faults­Relays

Ext D/A Output RX SIG LVL

ON

OFF

NOTHING

TX FWD PWR

Maps pre-determined fault conditions to trigger relays at
the NMS I/O card

External output follows Receive Signal Level.
External output follows nothing.
External output follows Transmit Forward Power.

ON

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-16

3.4.11 Alarms

Alarm(s)

Total Alarms Since

Reset-1

Alarm(s)

Rev Pwr > 0.25 W
15:20:24 6/29/98

Module Parameter Nominal Trip Value
QAM RF TX

PA Current 2.5 Amp > 3.0 Amp
LO Level 100% < 50%
Exciter Level 100% < 50%

QAM RF RX

LO Level 100% < 50%
QAM MODEM
Synth Level 100% < 50%
Modulator only Modem Level 100% < 50%

Reverse Power 0.05 Watt > 0.25 Watt

RSL -30 to –90 dBm

BER - >1.00E-04

Alarm definition: A specific parameter is out of tolerance, but is NOT crucial for proper
system operation. ALARMS are cautionary only, and indicates a degradation in a system
parameter.

Logging: All fault and alarm events are logged with the date and time.
Alarm screen reset: After viewing the screen, press ENTER to clear all logs entries. If the

alarm has been corrected, no new logs will be generated.

DataNex EMS Wireless, DATA-20 Digital Radio

3-17 Front Panel Operation

3.4.12 Faults

Fault(s)

Total Faults Since

Reset-1

Fault(s)

Fwd Pwr < 0.5 W
15:18:43 6/29/98

Module Parameter Nominal Trip Value
QAM RF TX

AFC Lock Lock Unlock
PA Temp 40 deg C >80 deg C

QAM RF RX
QAM MODEM

Mbaud Lock Unlock
Dbaud Lock Unlock
Dfec Lock Unlock

Fault definition: A specific parameter is out of tolerance and is crucial for proper system
operation.

Logging: All fault and alarm events are logged with the date and time.
Fault screen reset: After viewing the screen, press ENTER to clear all logs entries. If the

fault has been corrected, no new logs will be generated.

Forward Power 1.0 Watt < 0.5 Watt

AFC Lock Lock Unlock
AFC Lock Lock Unlock

3.4.13 G821 Parameters

SLOSS 0.000E +00

QAM Modem

ES 0.000E +00
SES 0.000E +00
UNAS 0.000E +00

Function Settings Summary

SLOSS 0.000E +00 Number of times the signal has been lost for more than

10 seconds
ES 0.000E +00 Errored seconds
SES 0.000E +00 Severely errored seconds
UNAS 0.000E +00 Unavailable seconds

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-18

3.4.14 QAM Modem Status

QAM Modem

QAM Modem
BER Post
#Bits

#Errors

-80 dBm

0.00E+00

0.0000E+00

0.0000E+00

Note:

QAM Modem

BER Pre

#Bits

#Errors

-80 dBm

0.00E+00

0.0000E+00

0.0000E+00

Received Signal Level

Function Settings Summary

BER Post 0.00E-00 Post-FEC (Forward Error Correction) Bit Error Rate since

last “ENTER” reset

BER Pre 0.00E-00 Pre-FEC (Forward Error Correction) Bit Error Rate since

last “ENTER” reset
# Bits 0.0000E+00 # of Bits counted since last “ENTER” reset
# Errors 0.0000E+00 # of Errors counted since last “ENTER” reset

DataNex EMS Wireless, DATA-20 Digital Radio

3-19 Front Panel Operation

QAM Modem Status (continued)

Qmdm MOD

Baud
IFMOD

Qmdm DEMOD

Baud
Fec

Qmdm

Synth LOCK

AFC

LOCK
4 %

LOCK
LOCK

3.7 V

Qmdm

IFOUT 95
Mode

Qmdm MOD
Baud

DRT
Enc

Qmdm MOD
Spctr

Fltr
Intrl

64Q

280.5
1535
DVB

NRML
18
3

%

k
k

%

Function Settings Summary

BAUD LOCK (default)

UNLOCK

IFMOD 0 – 100%

Indicates modulator PLL is locked to incoming data
clock

100% NOM

BAUD LOCK (default)

UNLOCK

FEC LOCK (default)

Indicates demodulator PLL is locked to incoming
data clock

Indicates FEC decoder is synchronized

UNLOCK

SYNTH LOCK (default)

Confirms 70 MHz IF synthesizer is phase locked

UNLOCK

AFC 0 – 9.9 VDC

70 MHz IF synthesizer AFC voltage

3.7 VDC (nominal)

IFOUT 0 – 100%

Modulator level

100% (nominal)
Mode 16-64Q Modulation mode:16QAM, 32QAM, 64QAM
BAUD 280.5 K Symbol rate
DRT 1535 K Data rate
ENC DVB Encoding mode
SPCTR NRML Spectrum Normal or Invert
FLTR 18 % Nyquist filter
INTRL 3 Interleave Depth

Continued on next page.

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-20

QAM Modem Status (continued)

Qmdm DEMOD

DRT
Enc

Qmdm DEMOD
Spctr

Fltr
Intrl

Qmdm
Test

280.5
1535
DVB

NRML
18
3

NORMAL

kBaud

k

Clk Src Recov
Clk Ph Norm

%

Clk Ph Norm

Data Src Norm

TX CLOCK

TX CLK OUT

RX OUT

Clk Src Recov
Clk Ph Norm

Qmdm Intfc

Intfc

TRNK

FVers 1.5
XVers 2.1

Qmdm

Function Settings Summary

BAUD

DRT0 1535 K
ENC DVB
SPCTR NRML
FLTR 18 %
INTRL 3

TEST
Interface
Clk Src (Tx

Clock)

Clk Ph (Tx

280.5 K

NORMAL
Trunk
Internal, EXT TXC,

EXT RXC,
Recovered

Inverted, Normal

Symbol rate
Data rate
Encoding mode
Spectrum Normal or Invert
Nyquist filter
Interleave Depth
Internal Test Pattern Generator
Active Interface
Clock source of the Transmitter.

Clock Phase of the Transmitter.

Clock)
Clk Ph (Tx

Inverted, Normal

Clock Phase of the Transmitter Clock Out.

Clock Out)
Data Src (Rx

Out)

Norm, RPT, Loop

Data Source of the Receiver Out. Normal means the
source is either BKPLN or TRNK; RPT sets the radio to

Repeater; Loop sets the radio to loopback mode.
Clk Src (Rx
Out)
Clk Ph (Rx

Internal, EXT TXC,
EXT RXC, Recov

Norm, Inverted

Clock Source of the Receiver Out.

Clock Phase of the Receiver Out.
Out)
Fvers
Xvers

Internal is the internal clock of the NXE1; EXT TXC is the External Transmit Clock; EXT RXC is
the External Receive Clock; Recovered is the recovered clock from the receiving RF.

DataNex EMS Wireless, DATA-20 Digital Radio

3-21 Front Panel Operation

3.4.15 QAM Radio TX Status

DTV Menus

QAM Radio TX Status

QAM Radio TX Status

Freq

TX
Xmtr
Fwd
Rev

Tx
PA Cur
Temp
Synth

Tx

AFC
LO

Xctr %

xxxx.xxx

FORC

1.00

0.00

2.50
45
LOCK

3.8
100

100

MHz

W

W

A
C

V

%

Freq

TX
Xmtr

Tx

Synth

Tx

AFC
LO

Xctr %100

xxxx.xxx

FORC

LOCK

3.8
100

MHz

V
%

Function Settings Summary

Freq A 2300.00MHz Displays the transmitter output carrier frequency
XMTR

TRAFFIC
FORCED (default)

FWD 0 – 9.99 Watt

1.00 Watt (nominal)

REV 0 – 9.99 Watt

0.07 Watt (nominal)

Status of transmitter:
ON in a hot standby mode
Forced ON
Output Power of TX. This menu item does not appear

when the unit is configured for DTV.
Reverse (or reflected) power at antenna port. This

menu item does not appear when the unit is
configured for DTV.

PA CUR 0.00– 9.99 Amp

2.40 Amp (nominal)

TEMP 0– 99.9 deg C

45.0 deg C (nominal)

SYNTH LOCK (default)

UNLOCK

AFC 0 – 9.9 VDC

3.8 VDC (nominal)

LO 0 – 99.9%

Power amplifier current consumption. This menu item
does not appear when the unit is configured for DTV.

Power amplifier temperature. This menu item does not
appear when the unit is configured for DTV.

Indicates phase lock of the 1

st

1

LO PLL AFC Voltage

st

1

LO relative power level

st

LO

100% (nominal)

XCTR 0 – 99.9%

Transmit module’s relative output power level

100% (nominal)

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-22

3.4.16 QAM Radio RX Status

QAM Radio RX Status

Freq

RX
Rcvr
RSL
Atten

RX
SYNTH LOCK

AFC
LO

xxxx.xx

FORC

-80
AUTO

4.4

100.0

MHz

dBm

V

%

Function Settings Summary

Freq A 2300.00 MHz Displays the receiver operating frequency
XMTR

TRAFFIC

FORCED (default)

Transfer status of receiver:
Is operating, ready for transfer

Is operating, will not transfer (forced ON)

RSL -30.0 to -90.0 dBm Received signal level (signal strength)

Nominal level dependent upon customer path/system
gain

ATTEN

AUTO (default)
ON
OFF

SYNTH LOCK (default)

UNLOCK

AFC 0 – 9.9 VDC

3.5 VDC (nominal)

LO 0 – 99.9%

Receiver PIN attenuator setting:
Controlled by internal software
Forced ON
Forced Off
Indicates phase lock of the 1

st

1

LO PLL AFC Voltage

st

1

LO relative power level

st

LO

100% (nominal)

3.4.17 QAM Radio TX Control

Function Settings Summary

TX-A Radiate AUTO (default)

ON
OFF

DataNex EMS Wireless, DATA-20 Digital Radio

QAM Radio TX Control

TX Radiate

AUTO

Transmitter radiating, but folds back output power on
high antenna VSWR (REV PWR)
Transmitter radiating
Transmitter not radiating

3-23 Front Panel Operation

3.4.18 QAM Radio RX Control

QAM Radio RX Control

RX Atten

Function Settings Summary

RX-A ATTEN AUTO (default)

ON
OFF

ON, and is activated on high signal level

ON always
OFF

AUTO

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-24

3.4.19 QAM Modem Configure

QAM Modem Configure

Power-On Default

Mode/Effic

Data Rt
Intrlv
Spctrm

Fltr

Encode
Test
Loopback CLR(OFF)

32Q/5

2048 k

3

INVRT

18

DVB

PRBS23

Function Settings Summary

Interface QPSK/2, 16Q/4, 32Q/5, 64Q/6,

Default is 64QAM

128Q/7, 256Q/8
DATA RATE N x 64 kbps, Valid range depends upon configuration.
INTERLEAVE 1

2

3 (default)

4

6

12

2,17

2,34

Interleave depth.
1 to 204

2,51

2,68

2,102

2,204
SPECTRUM INVERT (default)

FILTER 18

Nyquist roll-off factor
15 (default)
12

ENCODING DVB (default) Raw data format
TEST NORMAL (default)

Test pattern length
PRBS15, PRBS23

Loopback CLR (Off)

Loopback mode
RMT+LOC
RPTR

DataNex EMS Wireless, DATA-20 Digital Radio

3-25 Front Panel Operation

QAM Modem Configure (continued)

QAM Interface

Intfc

DTE Trnk

TX CLOCK
Clk Src Recov
Clk Ph Norm

TX Clk Out
Clk Ph Norm

RX Out
Data Src Norm
Clk Src Norm
Clk Ph Norm

Qmdm
FVERS 1.5
XVER 2.1

Function Settings Summarys

Interface Trunk

Radio (bkpln)
Clk Src (Tx
Clock)

Clk Ph (Tx

Internal, EXT TXC,

EXT RXC,

Recovered

Inverted, Normal

Uses Trunk for I/O.
Uses Backplane for I/O.
Clock source of the Transmitter.

Clock Phase of the Transmitter.

Clock)
Clk Ph (Tx

Inverted, Normal

Clock Phase of the Transmitter Clock Out.

Clock Out)
Data Src (Rx

Out)

Norm, RPT, Loop

Data Source of the Receiver Out. Normal means the
source is either BKPLN or TRNK; RPT sets the radio to

Repeater; Loop sets the radio to loopback mode.
Clk Src (Rx
Out)
Clk Ph (Rx Out)
Fvers
Xvers

Internal, EXT TXC,
EXT RXC, Recov

Norm, Inverted

Clock Source of the Receiver Out.

Clock Phase of the Receiver Out.

Internal is the internal clock of the DATA-20; EXT TXC is the External Transmit Clock; EXT
RXC is the External Receive Clock; Recovered is the recovered clock from the receiving RF.

NOTE: See the User Clock Options Conceptual Diagram in Figure 3-4 below for clarification.

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-26

3.4.19.1 Typical Configuration

A typical installation of DATA-20 Digital Radios involves configuring each DATA-20 as either Data
Communications Equipment (DCE) or as Data Terminal Equipment (DCE), as illustrated below:

Tx Clock

Rx Clock

Telecom Equipment

Configured

as DCE

Configured

as DTE

Configured

as DTE

Repeater

(DCE coupled with a DTE)

A DCE coupled together with a DTE enables the signal to be relayed to another DCE. This
configuration is called a Repeater. A network can consist of as many Repeaters as necessary.
The following sub-sections describe how to configure the DATA-20 a DCE or as a DTE.

3.4.19.2 DATA-20 as Data Communications Equipment (DCE)

By default, the DATA-20 is configured as Data Communications Equipment (DCE). In the mode,
the device recovers the transmitted clocks and effectively performs as a modem.

DataNex EMS Wireless, DATA-20 Digital Radio

Configured

as DCE

3-27 Front Panel Operation

Configured

as DCE

To configure the DATA-20 as a DCE, select the following clock settings in the System menu:

QAM Inerface

Intfc DCE Trunk

TX CLOCK
Clk Src Recov
Clk Ph Norm

TX CLK OUT

Clk Ph Norm

RX CLOCK
Clk Src Recov
Clk Ph Norm

3.4.19.3 DATA-20 as Data Terminal Equipment (DTE)

When configured as Data Terminal Equipment (DTE), the DATA-20 gets its clock from an
external source, such as a telecommunications device.

Tx Clock
Rx Clock

Telecom Equipment

Configured

as DTE

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-28

To configure the DATA-20 as a DTE, make the following clock selections in the System menu:

QAM Interface

Intfc DTE Trunk

TX CLOCK
Clk Src EXT TXC
Clk Ph Norm

TX CLK OUT

Clk Ph Norm

RX CLOCK
Clk Src EXT TXC
Clk Ph Norm

DataNex EMS Wireless, DATA-20 Digital Radio

3-29 Front Panel Operation

3.4.19.4 User Clock Options Conceptual Diagram

Figure 3-4. User Clock Options Conceptual Diagram

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-30

3.4.20 QAM Radio TX Configure

QAM Radio TX Config

Freq

MHzxxxx.xx

press

'EN TER'

QAM Radio TX Config
LO Side
LO Freq
LO Step

LOW

1020.0000

25.0

MHz

KHz

press
'ES C'

Save Setting ? No

press "Left

arrow" to say

YES

press

'EN TER'

Function Settings Summary

FREQ 2300.00 MHz Displays the frequency of the transmitter and allows the

user to make frequency changes.

LO Side LOW

HIGH

LOW: LO freq is less than carrier freq.

High: LO freq is greater than carrier freq.
LO Freq 2370 MHz
LO Step 25.0 KHz Programming frequency step size

DataNex EMS Wireless, DATA-20 Digital Radio

3-31 Front Panel Operation

3.4.21 QAM Radio RX Configure

QAM Radio RX Config

Freq

MHzxxxx.xx

press

'EN TER'

QAM Radio RX Config
LO Side
LO Freq
LO Step

LOW

1020.0000

25.0

MHz

KHz

press
'ES C'

Save Setting ? No

press "Left

arrow" to say

YES

press

'EN TER'

Function Settings Summary

FREQ 2300.00MHz Displays the frequency of the receiver and allows the

user to make frequency changes.

LO Side LOW

HIGH
LO Freq 2370.00 MHz
LO Step 25.0 KHz Programming frequency step size

LOW: LO freq is less than carrier freq.
High: LO freq is greater than carrier freq.

3.5 NMS/CPU PC Configuration Software

The NMS/CPU card is configured with a Windows-based PC software package. The hardware is
accessed through the serial port on the NMS card back panel. See the manual for EMS Wireless
DATA-20 Configuration Software for more information.

3.6 Up/Down Converter: Frequency Adjust

3.6.1 TX Frequency Adjust

It is possible to change the carrier frequency of the transmitter via the front panel.

Before changing frequency ensure that this is carried out in a controlled environment with test
equipment to ensure that you are transmitting the defined frequency:

DataNex EMS Wireless, DATA-20 Digital Radio

Front Panel Operation 3-32

1. Power-up the unit and navigate the LCD screens as follows:

QAM Radio Launch

CONFIGURE
TXA

QAM Radio TX Config

1. Using the cursors, change to the desired frequency. Press ENTER and the TX will
most likely lose AFC LOCK.

2. Navigate the LCD screens to monitor the AFC voltage as follows

1. Ensure that the voltage reads 0.5 to 9.5 +/- .25 VDC.

2. The TX should achieve AFC LOCK and the operation is successful.

3.6.2 AFC Level—RX

Freq

QAM Radio Launch

STATUS
TXA

TX
AFC

LO
Xctr %

4.5
50

50

MHzxxxx.xx

VDC

%

It is possible to change the operating frequency of the receiver via the front panel.

Before changing frequency ensure that this is carried out in a controlled environment with test
equipment to ensure that you are transmitting the defined frequency:

1. Power-up the unit and navigate the LCD screens as follows:

DataNex EMS Wireless, DATA-20 Digital Radio

QAM Radio Launch

CONFIGURE
RXA

QAM RADIO RX Config

Freq

MHzxxxx.xx

3-33 Front Panel Operation

1. Using the cursors, change to the desired frequency. Press ENTER and the RX will
most likely lose AFC LOCK.

2. Navigate the LCD screens to monitor the AFC voltage as follows

QAM Radio Launch

STATUS
RXA

RX
SYNTH LOCK

AFC
LO

100

4.5

VDC

%

3. Ensure that the voltage reads 0.5 to 9.5 +/- .25 VDC.

4. The RX should achieve AFC LOCK and the operation is successful.

DataNex EMS Wireless, DATA-20 Digital Radio

4 Data Interface Cables

INDICATES

MUX CHANNEL

TXD_I_A

TXD_I_B

RXD_O_A

RXD_O_B

TXC_I_A

TXC_I_B

TXC_O_A

TXC_O_B

RXC_O_A

RXC_O_B

SIG_GND

CONN SHELL GND

HD15M

6

7

13

14

4

5

2

3

10

11

1

TWISTED

PAIR

SHIELD

V.35 FEMALE

(DCE)

P

SEND DATA (A)

S

SEND DATA (B)

R

RECEIVE DATA (A)

T

RECEIVE DATA (B)

U

TERMINAL TIMING (A)

W

TERMINAL TIMING (B)

Y

SEND TIMING (A)

AA

SEND TIMING (B)

V

RECEIVE TIMING (A)

X

RECEIVE TIMING (B)

B

SIGNAL GROUND

C

REQUEST TO SEND

D

CLEAR TO SEND

E

DATA SET READY

H

DATA TERMINAL READY

F

RECEIVE LINE SIGNAL DETECTOR

A

CHASSIS GROUND

Figure 4-1. Mux Channel – V.35 (DCE)

Appendix 4-2

Figure 4-2. Trunk to Trunk Cable (Mux-Trunk Null)

DataNex EMS Wireless, DATA-20 Digital Radio

5 Appendix

5.1 Abbreviations & Acronyms

A/D, ADC Analog-to-Digital, Analog-to-Digital Converter

ADPCM Adaptive Differential Pulse Code Modulation

AES/EBU Audio Engineering Society/European Broadcast Union

AGC Auto Gain Control

ATM Automatic Teller Machine

BER Bit Error Rate

CMRR Common Mode Rejection Ratio

Codec Coder-Decoder

CPFSK Continuous-Phase Frequency Shift Keying

CSU Channel Service Unit

D/A, DAC Digital-to-Analog, Digital-to-Analog Converter

DB Decibel

DBc Decibel relative to carrier

DBm Decibel relative to 1 mW

DBu Decibel relative to .775 Vrms

DCE Data Circuit-Terminating Equipment

DSP Digital Signal Processing

DSTL Digital Studio-Transmitter Link

DTE Data Terminal Equipment

DVM Digital Voltmeter

EIRP Effective Isotropic Radiated Power

EMI Electromagnetic Interference

ESD Electrostatic Discharge/Electrostatic Damage

FEC Forward Error Correction

FET Field effect transistor

FMO Frequency Modulation Oscillator

FPGA Field Programmable Gate Array

Appendix 5-2

FSK Frequency Shift Keying

FT1 Fractional T1

IC Integrated circuit

IEC International Electrotechnical Commission

IF Intermediate frequency

IMD Intermodulation Distortion

ISDN Integrated-Services Digital Network

Kbps Kilobits per second

KHz Kilohertz

LED Light-emitting diode

LO, LO1 Local oscillator, first local oscillator

LSB Least significant bit

Mbps Megabits per second

Modem Modulator-demodulator

Ms Millisecond

MSB Most significant bit

MUX Multiplex, Multiplexer

µs

µV

Microsecond

Microvolts

NC Normally closed

NMS Network Management System

NO Normally open

PCB Printed circuit board

PCM Pulse Code Modulation

PGM Program

PLL Phase-Locked Loop

QAM Quadrature Amplitude Modulation

R Transmission Rate

RF Radio Frequency

RPTR Repeater

RSL Received Signal Level (in dBm)

RSSI Received Signal Strength Indicator/Indication

RX Receiver

SCA Subsidiary Communications Authorization

SCADA Security Control and Data Acquisition

SNR Signal-to-Noise Ratio

DataNex EMS Wireless, DATA-20 Digital Radio

5-3 Appendix

SRD Step Recovery Diode

STL Studio-Transmitter Link

TDM Time Division Multiplexing

THD Total harmonic distortion

TP Test Point

TTL Transistor-transistor logic

TX Transmitter

Vrms Volts root-mean-square

Vp Volts peak

Vp-p Volts peak-to-peak

VRMS Volts, root-mean-square

VSWR Voltage standing-wave ratio

ZIN Input Impedance

ZOUT Output Impedance

5.2 Conversion Chart

microvolts to dBm (impedance = 50 ohms)

microvolts dBm microvolts dBm

0.10 -127.0 180 -61.9

0.25 -119.0 200 -61.0

0.50 -113.0 250 -59.0

0.70 -110.1 300 -57.4

1.0 -107.0 350 -56.1

1.4 -104.1 400 -54.9

2.0 -101.0 450 -53.9

2.5 -99.0 500 -53.0

3.0 -97.4 600 -51.4

3.5 -96.1 700 -50.1

4.0 -94.9 800 -48.9

4.5 -93.9 900 -47.9

5.0 -93.0 1,000 -47.0

6.0 -91.4 1,200 -45.4

7.0 -90.1 1,400 -44.1

8.0 -88.9 1,600 -42.9

DataNex EMS Wireless, DATA-20 Digital Radio

Appendix 5-4

microvolts dBm microvolts dBm

9.0 -87.9 1,800 -41.9

10 -87.0 2,000 -41.0

11 -86.2 2,500 -39.0

12 -85.4 3,000 -37.4

14 -84.1 3,500 -36.1

16 -82.9 4,000 -34.9

18 -81.9 4,500 -33.9

20 -81.0 5,000 -33.0

25 -79.0 6,000 -31.4

30 -77.4 7,000 -30.1

35 -76.1 8,000 -28.9

40 -74.9 9,000 -27.9

45 -73.9 10,000 -27.0

50 -73.0 22.36 mV -20 (10 mW)

60 -71.4 70.7 mV -10(100 mW)

70 -70.1 223.6 mV 0 (1 mW)

80 -68.9 707.1 mV +10 (10mW)

90 -67.9 2.23 V +20(100 mW)

100 -67.0 7.07 V +30 (1 W)

120 -65.4 15.83 V +37 (5 W)

140 -64.1 22.36 V +40 (10 W)

160 -62.9

DataNex EMS Wireless, DATA-20 Digital Radio

5-5 Appendix

DataNex EMS Wireless, DATA-20 Digital Radio

Appendix 5-6

DataNex EMS Wireless, DATA-20 Digital Radio