Moseley NXE1-20 User manual

User Manual
NXE1-20
Digital Radio
Doc. 602-95555-01
January 10, 2002

Table of Contents ii
602-95555-01 Rev A NXE1-20 Digital Radio
NXE1 Manual Dwg # 602-95555-01; Revision Levels:
Section Drawing No: REV Revised/
Released Reason
NXE1-20 602-95555-01 ASN NEW

iii Table of Contents
602-95555-01 Rev A NXE1-20 Digital Radio
Table of Contents
1SYSTEM DESCRIPTION............................................................................1-1
1.1 INTRODUCTION ..........................................................................................................1-1
1.2 SYSTEM FEATURES.....................................................................................................1-1
1.3 TYPICAL CONFIGURATIONS..........................................................................................1-3
1.3.1 Data Rate and Interface....................................................................................1-3
1.3.2 Standalone Operation.......................................................................................1-3
1.3.3 Hot Standby (Protected) Operation....................................................................1-3
1.4 REGULATORY NOTICES ...............................................................................................1-5
1.5 SYSTEM DESCRIPTION (QAM)......................................................................................1-5
1.5.1 Introduction....................................................................................................1-5
1.5.2 QAM Modulator/IF Upconverter .......................................................................1-7
1.5.3 RF Upconverter...............................................................................................1-8
1.5.4 Power Amplifier (PA).......................................................................................1-9
1.5.5 RF Downconverter...........................................................................................1-9
1.5.6 QAM Demodulator/IF Downconverter..............................................................1-10
2INSTALLATION ..............................................................................................................................................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...................................................................2-2
2.6 POWER REQUIREMENTS...............................................................................................2-4
2.6.1 Power Supply Card Slot Details.........................................................................2-4
2.6.2 AC Line Voltage..............................................................................................2-5
2.6.3 DC Input Option..............................................................................................2-5
2.6.4 Fusing............................................................................................................2-5
2.7 POWER-UP SETTING....................................................................................................2-6
2.8 DATA INTERFACE .......................................................................................................2-7
2.8.1 4xE1/T1 MUX Channel Configurations ..............................................................2-7
2.9 HOT STANDBY (PROTECTED) CONFIGURATION...............................................................2-8
2.9.1 Hot/Cold Standby Modes..................................................................................2-9
2.9.2 Hot Standby Control using the Moseley TP64....................................................2-10
2.9.3 Hot Standby Control with Single Unit...............................................................2-13
2.10 SITE INSTALLATION..................................................................................................2-14
2.11 ANTENNA/FEED SYSTEM...........................................................................................2-14
2.11.1 Antenna Installation.......................................................................................2-14
3FRONT PANEL OPERATION.....................................................................................................................3-1
3.1 INTRODUCTION ..........................................................................................................3-1
3.2 FRONT PANEL OPERATION...........................................................................................3-1
3.2.1 LCD Display...................................................................................................3-1
3.2.2 Cursor and Screen Control Buttons....................................................................3-2
3.2.3 LED Status Indicators ......................................................................................3-3
3.2.4 Screen Menu Tree Structure ..............................................................................3-3
3.3 MAIN MENU ..............................................................................................................3-4
3.3.1 Launch Screens ...............................................................................................3-4
3.4 SCREEN MENU SUMMARIES.......................................................................................3-10

Table of Contents iv
602-95555-01 Rev A NXE1-20 Digital Radio
3.4.1 Meter ...........................................................................................................3-10
3.4.2 System: Card View.........................................................................................3-10
3.4.3 System: Power Supply ....................................................................................3-11
3.4.4 System: Info..................................................................................................3-11
3.4.5 System: Basic Card Setup ...............................................................................3-12
3.4.6 System: Factory Calibration............................................................................3-13
3.4.7 System: Unit-Wide Parameters ........................................................................3-14
3.4.8 System: Date/Time.........................................................................................3-15
3.4.9 System: Transfer............................................................................................3-15
3.4.10 External I/O..................................................................................................3-16
3.4.11 Alarms..........................................................................................................3-17
3.4.12 Faults...........................................................................................................3-18
3.4.13 G821 Parameters...........................................................................................3-18
3.4.14 QAM Modem Status.......................................................................................3-19
3.4.15 QAM Radio TX Status ....................................................................................3-22
3.4.16 QAM Radio RX Status....................................................................................3-23
3.4.17 QAM Radio TX Control..................................................................................3-23
3.4.18 QAM Radio RX Control..................................................................................3-24
3.4.19 QAM Modem Configure..................................................................................3-25
3.4.20 QAM Radio TX Configure...............................................................................3-31
3.4.21 QAM Radio RX Configure...............................................................................3-32
3.5 NMS/CPU PC CONFIGURATION SOFTWARE.................................................................3-32
3.6 UP/DOWN CONVERTER: FREQUENCY ADJUST ...............................................................3-32
3.6.1 TX Frequency Adjust......................................................................................3-32
3.6.2 AFC Level—RX.............................................................................................3-33
4DATA INTERFACE CABLES.......................4-1
5APPENDIX....................................................................................5-3
5.1 PATH EVALUATION INFORMATION................................................................................5-3
5.1.1 Introduction....................................................................................................5-3
5.1.2 Path Analysis..................................................................................................5-7
5.2 ABBREVIATIONS & ACRONYMS..................................................................................5-14
5.3 CONVERSION CHART.................................................................................................5-16

NXE1 Digital Radio 602-13068-01 Rev A
1System Description
1.1 Introduction
The NXE1-20 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. NXE1-20 Modular Open Architecture
The high spectral efficiency of the NXE1-20 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 & 16 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
§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

System Specifications & Description 1-2
602-95555-01 Rev A NXE1-20 Digital Radio
§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

1-3System Specifications & Description
NXE1-20 Digital Radio 602-95555-01 Rev A
1.3 Typical Configurations
1.3.1 Data Rate and Interface
Table 1-1 provides basic data channel capabilities for the NXE1-20. See Section 2 (Installation)
for more detailed information.
Table 1-1.NXE1-20 Data Channel Configurations
Data Rate MUX Hardware Channels Interface(s)
1.5 Mbps-8Mbps 2 or 4 x E1/T1 2 or 4 G.703, E1/T1
512 kbps-2Mbps QAM Modem 1Fractional E1/T1
512 kbps-2Mbps QAM Modem 1V35, RS449
1.3.2 Standalone Operation
The NXE1-20 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
1.3.3 Hot Standby (Protected) Operation
The product in a hot standby configuration as depicted in Fig.1-3, using two NXE1-20 radios and
a TP64 transfer panel.

System Specifications & Description 1-4
602-95555-01 Rev A NXE1-20 Digital Radio
TX RF
RELAY
DUPLEXER
DATA
SWITCH/
TRANSFER
LOGIC
TP64 TRANSFER
PANEL
NXE1 RADIO A
NXE1 RADIO B
DATA
TX
TX
RX RF
SPLITTER
RX
RX
ANTENNA
DATA
DATA
CNTL
CNTL
Figure 1-3. NXE1-20 Hot Standby –Two Discrete Radios with Transfer Panel

1-5System Specifications & Description
NXE1-20 Digital Radio 602-95555-01 Rev A
1.4 Regulatory Notices
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.
EC Declaration of Conformity
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.
RF Linear
PA
Back
Plane
Antenna
12.8 MHz
Data, Address, I 2C,SPIBus
Duplexer
Front Panel
Ribbon Cable
Universal
InputAC
(DCOptional)
System
Monitor
(A/D)
RF Module
DownConverter
Up Converter
IF Card
DownConverter
Up Converter
400MHz-
1.5GHzTX
RX
70MHz
QAM Modem
Demodulator
Modulator
Intelligent
MUX
+5/+15VDC
130Watt
Power
Supply
BarGraph
4 x 20 LCD Display
Status LEDs
Front
Panel
SystemCPU
NMS
RemoteI/O
FrontPanelInterface
SerialPCInterface
Status/Command/Control I/O
4 Port
Data/Voice
Interface
Channel 1
Channel 2
Channel 3
Channel 4
Trunk
Transfer Panel I/O
QAM Modem Module
+15 VDC
PAControl/
Current
Sense

System Specifications & Description 1-6
602-95555-01 Rev A NXE1-20 Digital Radio
Figure 1-12. NXE1-20 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. See Figure 1-13 below for locations of the Backplane and the Power Amplifier. The
power supply levels and status are monitored on the backplane and the NMS/CPU card
processes the data.
Figure 1-13. Location of theNXE1-20Backplane 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.
Backplane
Digital Radio