Exhibit 8 -- Users Manual
SpectraPoint Wireless LLC
Customer Premises Equipment Roof Unit 2.0
FCC ID: NNSRTU2000-00
Model Number : RTU2000-28-3
Information Provided in this Exhibit:
Operating Instructions for the SpectraPoint CPE Roof Unit Transceiver (Stand-Alone
Configuration)
The Customer Premises Equipment Roof Unit transceiver, under operational conditions is under
control of the element controller and network management software which automatically
determines the operating frequencies and power levels and monitors the performance of the
system.
The User Manuals delivered with the system describes the installation of the entire system but
does not include stand-alone operation of the individual components of the system. Therefore,
this document describes the equipment setup and operation employed for stand-alone operation
of the CPE Roof Unit transceiver, as applicable to compliance testing.
For stand-alone testing such as functional checkout or compliance testing, this user’s manual
provides the instructions so that the Roof Unit transceiver may be operated at maximum rated
output power with automatic power control disabled. In addition, the Roof Unit may be
commanded to various operating frequencies within the allocated band of operation and
modulated with actual or simulated IF input signals.
Exhibit 8
FCC ID: NNSRTU2000-00
4/05/00 Page 1 of 4
Instructions for Stand-Alone Operation
of the CPE Roof Unit Transceiver Version 2.0
1.0 Scope
This document provides the instructions for operation of a single CPE Roof Top Unit
transceiver for test purposes (i.e., without the control of the SpectraPoint System).
2.0 Introduction
The CPE Roof Unit transceivers, when operating under control of the SpectraPoint
System, receives QPSK (quadrature phase shift keying) modulated RF signals
(downstream telephony, digitized video or digital data) from one or more SpectraPoint
Node Transmitters (LMDS Base Station). The CPE Roof Unit likewise transmits a QPSK
modulated RF signal (upstream) from the CPE Network Interface Unit (NIU) to the
SpectraPoint Node Receivers (LMDS Base Station).
For test purposes, the QPSK modulated input signal to the Roof Unit transmitter, at the
appropriate center frequency, modulation, bandwidth and level must be provided by test
hardware and software which is defined in this document.
3.0 Interconnection of Support Equipment
The interconnection of the CPE Roof unit with the test fixture and support equipment is
shown in figure 4-1. Operational parameters for setup of the support hardware and
software is provided in Table 4-1.
Using this support test equipment, the CPE Roof Unit will produce a single QPSK phase
modulated output at user-selected bandwidths (as in the SpectraPoint System).
4.0 Description of the Test and Support Equipment
The support equipment required to operate the CPE Roof Unit in a stand-alone mode is
shown in Figure 4-1 and consists of:
• DC power source for the Roof Unit electronics card
• Transmit enable signal
• DC Blocks for both the transmit and receive cables to protect the signal sources and
test equipment
• Source of the QPSK digitally-modulated signal (Rohde & Schwarz AMIQ Arbitrary
Waveform Generator and SMIQ Vector Signal Generator)
• Personal Computer with WinSim software to generate the QPSK I and Q Signals at
the AMIQ
4/05/00 Page 2 of 4
Exhibit 8
FCC ID: NNSRTU2000-00
Personal
AMIQ
SMIQ
75 Ω Cable
75 Ω Cable
HP 8564E
120 VAC 60 Hz
Computer
(WinSim Software)
(IEEE-488 Interface)
Arbitrary Waveform
Generator
Vector Signal Generator
Spectrum Analyzer
CPE Roof Unit
Test Fixture
I/F Input to Transmit Portion
and
Transmit Enable
CPE
Roof Unit
Power Input
Figure 4-1 CPE Roof Unit Test and Support Equipment
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I/F Output from Receive Portion
and
DC Power
Exhibit 8
FCC ID: NNSRTU2000-00
4.1 Generation of QPSK Test Signals
Test signals for the CPE Roof Unit, simulating I/F input from the SpectraPoint Network
Interface Unit (NIU), are generated in the AMIQ and transferred by operator command to
the SMIQ.
The WinSim software program is launched by double-clicking on the WinSim icon or by
selection from the Windows Program Start menu. The modulation parameters may be
manually entered through the PC keyboard or recalled from predefined parameters
stored on disk.
The NIU is capable of generating QPSK-modulated signals ranging from approximately
1.5 MHz bandwidth to 10.0 MHz bandwidth depending on a variety of operating rates
and error correction schemes required for reliable operation of a SpectraPoint LMDS
installation. The CPE Roof Unit test and support equipment has the capability to
simulate these complex signals and provide the DC power and enable command to
operate the unit for test and analysis.
4.2 QPSK Test Signals
Two QPSK signals are stored as data files on disk, one having a low data rate
representing the narrowest bandwidth signal that will be produced by the NIU in
operation, and one having a high data rate representing the widest bandwidth signal that
will be produced by the NIU in operation. Refer to Table 4-1 for these parameters.
Table 4.1 Parameters for Rohde & Schwarz AMIQ Modulation Setup
AMIQ Window
Data Source PRBS PRBS 9
Modulation Coding None
Modulation Type QPSK
Modulation Sequence Length 10,000
Modulation Filter Function Root Cosine
Modulation Window Function Rect
Modulation Symbol Rate 1.257 MSps for min BW
Modulation Oversampling 16 for min BW
Main Sampling Rate 20.112 MHz for min BW
Main Samples 160,000 for min BW
Parameter Setting
7.332 MSps for max BW
12 for max BW
87.984 MHz for max BW
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120,000 for max BW
Exhibit 8
FCC ID: NNSRTU2000-00
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