ADTRAN TRACER 2xT1, Руководство пользователя

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TRACER 2xT1 User’s Manual
61280003L2-1B
Section 1 TRACER Description
1 Preliminary
INTRODUCTION
The TRACER provides dual T1 transport by way of a spread spectrum microwave link for distances up
to 30 miles or more depending on path engineering. System performance is determined, in part, by the
engineering of the microwave link. Each end of a TRACER link is composed of two units -- the
baseband processor (BBP) and the radio frequency converter (RFC). Two DS1/DSX-1 (T1) interfaces
are provided on the rear of the BBP, which can be mounted in a 19-inch rack. The DS1/DSX-1 interface
provides connections up to 6000 feet from T1 equipment. A single coaxial cable connects the BBP to the
RFC and another connects the RFC to the antenna.
ISM BAND SPREAD SPECTRUM
The Federal Communications Commission (FCC) has established several portions of the radio frequency
(RF) spectrum for use in Industrial, Scientific, and Medical (ISM) applications. Part 15.247 of the FCC
rules describes the requirements of systems that operate in these bands. The three bands set aside,
902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz, are designated for use by spread spectrum
transmitters, either frequency hopping or direct sequence. The TRACER operates in the 2400 to 2483.5
MHz or 5725-5850 MHz band using direct sequence spread spectrum (DSSS) transmission.
NEBS
Network Equipment Building Standards (NEBS) defines a rigid and extensive set of performance,
quality, environmental and safety requirements developed by Telcordia, the R&D and standards
organization owned by the seven regional Bell operating companies (RBOCs). NEBS compliance is
often required by telecommunications service providers such as BOCs (Bell Operating Companies) and
Interexchange Carriers (IEC) for equipment installed in their switching offices. NEBS defines everything
from fire spread and extinguish ability test to Zone-4 earthquake tests, thermal shock, cyclic temperature,
mechanical shock, and electro-static discharge. TRACER is NEBS Level 3 compliant (see
Table 1-1
for a list of testing requirements.)
Table 1-1. NEBS Testing Requirement
Description
R4-6/72 Equip. should withstand exposure to “Table 4-4 Short T”
R4-7/73 Equip should withstand exposure to “Table 4-5 Short T”
R4-3 - R4-5/69-70 Exposure to tests in Tables 4-2, 4-3
R4-41- R4-43/107-109 Packaged and Unpackaged shock criteria
R4-58/124 Transportation vibration criteria
R4-44 - R4-46/110-112 Equipment and Frame Level testing of Section 5.4.1
R4-48/114 Functional requirements testing of Section 5.4.1
O4-49/115 Constructed to meet testing of Section 5.4.1
R4-51/117 Base mounting to floor without auxiliary support
R4-53/119 Specs for concrete anchors
O4-60/126 Equipment should withstand testing “Table 4-10”
R4-61/127 Equipment should withstand testing “Table 4-10” and o.s.air
O2-4/4 Perform under tests of IEC 801-2, Clause 5
O3-2/9 EMI Emissions (Open Doors)
CR3-11/18 Radiated Performance Criteria
R3-10/17 Radiated Immunity Criteria
CR5-2/43 Signaling - test to Table 5-1 (>20 ft)
CR5-4/45 C-Message -Signaling-test to test condition (>20 ft)
CR5-9/50 Signaling - test to Table 5-3 (>20 ft)
CR5-11/52 C-Message weighted metallic noise test (>20 ft)
Document
GR-63
Operational Thermal
(Short Term Conditions)
Storage Environments and Transportation
and Handling
Earthquake (Zone 4 Level)
Airborne Contaminants (Outdoor Levels)
GR-1089 ESD (Installation and Repair)
EMI Emissions (Open Doors)
EMI Immunity (Open Doors)
Steady State Power Induction
Conditional Requirements
S
ECTION
1
TRACER D
ESCRIPTION