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MIL-T-21490 (AS)
Tsble III. Power Hsndling Capability
Cable Input Power Rating Test
Type Continuous Power Peak Power Frequency
(See 1.2) [See Not~ 1) (In GH2)
I 4s0 watts 12.0 Kw 8.0
h’~E 1: Ratings established for non-heat-sinked connector pairs exposed
to +360”F/70,000 ft. altitude environment..
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3.8.1.8 High Potential Withstanding Voltage - The high potential withstanding
I voltage rating for TEM Transmission Lines shall be as specified in table IV. If two
different interface types are required on the TSM Transmission Line, the high
potential withstanding voltage rating of the TEM Transmission Line shal1 be that of
the interface type with the lower rating. When tested as specified in 4.7.24
Procedure 1, there shal1 be no evidence of voltage breakdown.
I Table IV. High Potential Withstsnding Voltage
Ratings For TSM Transmission Lines
Interface T~e Rating At Rating At
(See 3.7) Sea Level 70,000 Feet
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1 3,000V (Rt45) 1,800V @lS)
2 s ,Ooov [RMS) 3 ,Ooov (RMs)
3 2,SOOV (RM5) 1,Soov @MS)
3.8.1.9 Explosive Atmosphere - Ithentested as specified in 4.7.21, the TEM
Transmission Line shall operate satisfactorily in an explosive atmosphere
environment.
3.8.1.10 Phase Characteristics - When requirsd, phase characteristics shall be
specified in the detail specification drawings. Required test methods shall also be
specified in the ‘detailspecification drawings and shal1 be in accordance with the
requirements of 4.6 (see 6 .2).
3.8.2 Mechanical Performance -
3.8.2.1 General Requirements - When subjected to the mechanical .perfonnance
tests specified herein, the TEM Transmission Line shall meet the required
performance parameters specified herein and in the detai1 specification drawings.
In the event of conflict between this document and the detail specification drawings,
the latter shall govern (see 6.2).
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MIL-T-81490 (As)
3.8.2.1.1 The parameters listed for the ms~anical performance tests shal1 be j
adjusted in accordance with the procedures specified in 4.1.1 for use as inspection
criteria.
3.8.2.2 Vapor Leskage - Nhen tested as specified in 4.7.6, the TEM
-s
Transmission Line shal1 have a leakage rate of less than 1x1O cubic centimeters
per second per foot of length.
3.8.2.3 Vibration - When testsd as specified in 4.7.12, the TEM Transmission
Line shalI meet the requirements of 3.8.1.2, 3.8.1.3, snd 3.8.2.2.
3.8.2.4 Impact Shock - When tested as specified in 4.7.14, the TEII
Transmission Line shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.8.2.5 Flexure - Nhen tested as specified in 4.7.1S, Types I and 11 TFJ4
Transmission L~all meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3,8,2.6 = . men tested as specified in 4.7.16, the TEM Transmission Line
shall resetthe rsqulrements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.8.2.7 Tensile Load - When tested ss specified in 4.7.17, the TEM
Transmission Line shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.8.2.8 Concentrated Losd - When tested as specified in .s.7.
18, the TEM
Transmission Lhe shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.8.2.9 Abrasion - men tested as ski~cifiedin 4.7.:::,:ic ....
Line shall mee~quircments of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
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3.9 Service Conditions -
3.9.1 Environmental Test Conditions - Unless otherwise specified in the detail
specification drawings, the environmental test conditicms for TEM Transmission Lines
shzll be as spscified herein and are applicable to all types and classes of products
unless othenrise noted [see 6.2).
3.9.1.1 Temperature - The operating temperature test.conditions shall be frOm
-54” to +200nC (-65” to +392”Fshrenheit). When tested as specified in 4.7.9, the
TSM Transmission Line shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.9.1.2 Altitude - The operating altitude test conditions shal1 be from O to
70,000 feet (30.0 to 1.32 inches of msrcury). when tested as specified in 4.7.10,
the ‘llMTransmission Line shal1 meet the rsquirsments of 3.8.1.8.
3.9.1.3 Thermal Shock - Nhen testd as spscified in 4.7.11, the TfM
Transmission Line shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.9.1.4 Chemical Resistance - Nhen tested ss specified in 4.7.20, the TEM
Transmission Line shall resetthe requirements of 3.8.1.2, 3.8.1.3, and 3.8.2.2.
3.9.1.5 timidity - Nhen tested as specified in 4.7.22, the TEM Transmission
Line shall meet the requirements of 3.8.1.2, 3.8.1.3, 3.8.1.8, and 3.8.2.2.
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MIL-T-81490 (AS)
3.9.1.6 Salt-Fog - Nhen tested as specified in 4.7.23. the TF.MTransmission
Line shall meet the requirements of 3.8.1.2, 3.8.1.3, and 3.8.1.8.
3.10 Reliability -
3.10.1 Reliability Assuraace Tests - men specified by the procuring activity,
the manufacturer shall establish a reliability progrsm in accordance with the
requirements of MIL-STO-7S1. The procuring activity shal1 specify the “Ninimum
\ Acceptable U7BF (01)” or the “Specified MTBF (O.)” (see 6.2).
I 3.10.1.1 lhe design goal for expected operating life of a TEN Transmission
Line is s years minimum.
I ‘ 3.11 ktarking-
3.11.1 Marking Nomenclature - In addition to any special markings specified in
the detail specification drawing (see 6.2), the TSN Transmission Line and
replaceable interface components sbal1 be marked as follows:
Y Serial Number
(See 3.11.1.3)
~-T- Identifying Number (See 3.11.1.2)
Manufacturer’s Code (See 3.11.1.1)
3.11.1.1 Manufacturer~s Code - The applicable manufacturer’s code as
established in Cataloging Nandhooks N4-1 and H4-2, !?
Federal Supply Cede for
I Nanufacturers” shall be used. me manufacturer is defined as the individual, firm,
COIUPJIY,Or cOwOratiOn engaged in tbe fabri=tiOn Of finished T~ Trans~ ssiOn
Lines or replaceable interface components.
3.11.1.2 Identifying Number - The identifying number shall be assigned by the
procuring activity and shall be specified in “the,
detail specification drawings (see
6.2).
3.11.1.3 Serial Number - The serial number shall be generated by the
manufacturer. It shall consist of the following:
Xxxx - Ywxx
TI L hit ~mer
Mnntb/Year of Manufacture
[If not specified, these numbers shall “startupon
0001 for ea;h procurement) [See 6.2)
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MIL-T-81490 (AS)
3.11.2 Methcd of Application - Unless otherwise specified in the detail
specification drawings, the required marking shall be applied to the product by a
method selected by the manufacturer. The method selected shal1 conform to the
fOllOwing:
3.11.2.1 Lettering types shall be “Futuri” or “Gothic” capita!s and the
numerals shal1 be Arabic. Type size shall be sufficient as to be clearly legible.
3.11.2.2 The marking shall be of a permanent type and shall be capable of
withstanding the service conditions specified herein without degradation to itself
or the required performances for the TEM Transmission Line.
3.11.2.3 Whenever practicable, the markings shal1 be located so that it is
visible when the TEM Transmission Line is installed. When the location of the
marking is specified in the detai1 specification drawing, the marking shall so be
located.
3.11.3 Color-Coding - Unless utherwise specified in the detail specification
drawing, the outer covering of the TEM Transmission Line shal1 be color-coded solid
violet in accordance with EIA RS-319, preferred limits, throughout its entire length
CoJor-coding shall be a permanent type and shall be capable of withstanding the
service conditions specified herein without degradation of required performances for
the TEM Transmission Line.
3.12 _ -,The TEL{Transmission Line shall be processed in such a
canner as to be um otm Ln quality and shall be free of defects that will affect
performance, reliability or appearance.
3.12.1 Interfaces and associated metal parts shall be free of sharp edges,
burrs, damaged interface surfaces, and contaminants.
3.12.2 The outer covering of the assembly shall be free of cuts, dents, nicks,
frayed or burned spots that might affect the appearance or performance of the TEM
Transmission Line.
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,. MIL~T-81490 (AS)
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4. Q!JALITVASSURANCE PROVIS10NS
4,1 Responsibility for Inspection - Unless otherwise ‘specifiedin the contrac:
or purchase order, the manufacturer is responsible for the performance of al1
inspection requirements as specified herein. Except as otherwise specified in the
contract or order, the manufacturer may use his own or any other facilities suitab!e
for the performance of the inspection requirements specified herein, unless
disapproved by the Government. The Government reserves the right to perform any of
the inspections set forth in the specifications where such inspections are deemed
necessary to assure supplies and services conform to prescribed requirements.
, 4.1.1 Establishment of Inspection Acceptance Criteria - Prior to Qualification
apPrOVal, the manufacturer shall establlsh his inspection acceptance criteria for
use in the performance of al1 inspection requirements specified in this document by
the following procedure:
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4.1.1.1 The manufacturer shal1 prepare inspection plans that meet the
requirements of 4.3 (Qualification Inspection), 4.4 (First Article Inspection), 4.5
(Quality Conformance Inspection), and 4.7 ~est Methods). The plans shall i“cl”de
the test equipment to be used for each test and shal1 1ist the equipmentsI brand
names, model numbers, and serial numbers.
4.1.1,2 The manufacturer shall make an analysis of his test equipment,
Calibration system errors, and measurement methods, From this analysis, he shall
calculate the maximum residual error (“band of uncertainty!!)of his ineasurementand
test system (see 6.4.13).
4.1.1,3 The manufacturer shali submit the inspection plans (see 4.1.1.1) and
the analysis (see 4.1.1.2) to the Agent Facility (see 6.s] for review and
establishment of inspection acceptance criteria.
4.1.1:4 The Agent Facility wil1 review the manufacturers inspection plans and
wi11 establish inspection acceptance criteria, based on the fuynished analysis, that
will be used by the manufacturer in the perfcmmsnce of al1 inspection requirements
set forth in this document (see 6,4,14).
4,1.2 Test Equipment Calibration System - The manufacturer shal1 establish and
maintain a calibration system to control the accuracy of his measuring and test
equipment in accordance with the requirements Of MIL-C-4S662.
4.2 Classification of Inspections - The inspection requirements specified
herein are classified as follows:
(1) Qualification Inspection (see 4.3) .
‘(2) First Article Inspection (see 4,4).
(3) Quality Conformance Inspection (see 4.S) .
(4) Special Tests (see 4 .6).
[5) Test Methods (see 4,7).
4.3 Qualification Inspection - Qualification inspection shal1 consist of the
examinations and tests performed in the sequence set forth in table V on the
qualification test samples specified in 4.3.1. The Agent Facility wil1 issue to the
manufacturer a contract, purchase order, or letter of @uthoTization that will also
contain the following information:
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