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#I L. STD-llUAnoltcs I
10 September
9ULl:AnY SIAKMEO
lE S1 XTISOOS FOR UCCtI I CAL comwcvnl
10 ALL IIOL09.KS OF UIL.S7043UA:
1. TMt FOLLOMIIC -TWO 1S 10 M AOOtO:
urn Eeraoo OAri
1980
Sooe - SHIELO1#O EfFCCTllCmESS OrMLIICOS:UCT CO~lECTMS 10 September 1980
-EM PAM OAtl 6U9CUSCLK0 PSAE OAIE
s 10 Sep~r 19806 t 1 Sc$tcam SST?10 SeD~r IQWl 6 1 sevt-ber 1911
lCTAI1 TSIIS @OIICC PAGE MD Isssar KFOIIC TM lAsLf 0? Cosrcms.
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III IL. SIU-1J14A
14MLf 1. Cross .ef. r.nc. eq. a.* lent test 9vt..us.
III L. STO.1344W,lnoa
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1003100610U51UU61U071UU81U091010101110121013101s10162001XJoz2003aow2UU5
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Ffll. slo.l 344A.
10 September
METHOD 3008SHI[LOIM6 CFFCCTIr[Nf SS Of MIL1l CONIAC1 COnlt[CIORS
i. PfJaPosl .
1980
1.1 m. lht$ ●ethod ■easures the sn191d$n9 affect tveness of ■.lticonlaclconnectors !0 tba 1-10 WI1 frmau*ncy ran9e uti Iitimq 80a* -sttrred techniques.
1.2 pollcation. tYlt S ●*tbOd tnVO!**S ●9aS”Vla9 tll* 1eak49t ,t the COllIIeCtOV Pi?+atmrfaca of ● ●ultlcc.nt~ct connactor plac.a tn 4 Sh$eldea ●.c )os. re, as sno.n 0.figure Al. the connector .oa. r test if eavOs*O to ● lectr0ma9nettc ftelds which are”●bae stattsttcall~ ra.aon oy 4 rotating reflectl. e surface (=oar. s:irrerl. TheI.sksgc of the connector $s ●.D.*ssM as snl*t Oing ●ffectiveness ●t.sureti *. oectwls(do). TM Sft181difi9 ●ffectiwene%s of the connector in !YeciDels is Oef, neo 4s:
()s.,. .10106 ~’1.0 sctf ef ●aasurennts are rawtr. u: (1 I A reference ●aasurannt ana (2) a Shdeld●aasurrweat. Both ●sas. re=ents snal I De o*rf Ormed w1lII the test item in the Cha=beralla it ca* sa9* fr8qu*ncy utto ia 100 kfll. III* ref.v.nc. 8e*s. r*8c. t can be oerformeaomcs he sbcti f r*q.8nc J JIM cbn M u1$ 1 \a*o for s.ms*w*nt connector tests P.ovlneame ●8asur*unt systas is I(naar.
2. Otflmllloms.
64J;;!. WR.aaras ,$ .’*IS.The tntrrllattenal system of units, as aaoptea by the Untted st*tc\
lots SYSCR9 of units 10msi9na Led ‘S1- for SjstemIaternaLIOnal* d’Unites) was Oaf*nea ●na 91WIT ofttclal status ac cne lltn GeneralConference on Malehts ●a ffcasures t. Paris at e t960 =mer$wz. ffl L- STO-C63 91VCS ~#ascrloc$oa of CM* system of ualts used In this stanaara.
2.2 Tmrms. TII* ●aria.g of te.ms cent. t..u I. tnts test ●m 9* .ccora.8ce .itnMIL-STO= [9 ●oall$en to those t.rm, th. tol Io. !ng terms ●r. +1%0 def Inca:
2.2.1 Sh$eld- Conautt. Say Conauctor or conductors ●nc Iosea oy a SO140conducting sheath. Tna conductor or co. wclors ●ay tnemsel. es Ser. e as b sheath forott!er conductors .
2.2.2 Shleldad 9nC10Su?e. 4 tIOusing, SCr9en, or 0tb8, ObJWt 10al $5 ln18n0a0 COsuo$taocial II rduce tn. erttct 01 alectric or ●ag.*ttc-f$eles upon devices orCtrculcs O* em- side of ;Sta shkla. Caamc. t*s lnctu4* ca~es. cabtnets. ● trtrames, ●tc.
2.2.2 Ja$elalna ●lfectivenes~. For 8 gtfca Incident fttla, tne rat$o (usually●lvassee $. dmctrwls) of tr18 Da.er r8c. $.md BJ ● IO*O prO1eck*d by an elCCtrO-●aqnetlc Sbtald S9 that pe.or .htca .o. ld m. P* CO I..O of cna Ioaa tfi me ansenca oftha Shl.ld.
2.2.4 1*SK *tam. A qemeral term US*O to relar mitt!., a snieldeti Canle analorcOn O*ctOr.
AU6c UTcmdo
dDd69imfwzfopcltz
fm61fz
c* Ot!ut*rlSqrIa, al Iz90 dlmans$on, In ●ace.%, for dmlqn of ●Oan.stlrverDistance of connector from Chaaorr m.al ! ●qual 10 one wave lenqtn at tnclowest t.tt fr*9u*ncyo*clbalsPo.er ●ea%.rw la dI refe,enceo to one ● l I Ilw. t;Elactromaqnat IcFrequent, In qfgahcrtz
Freqencj in qlgahartl of lo.esl Operdtinq freq. encf for .ntcnwa,-st Irred Ctluner i$ O*% IgnrdFreQu. ncy ●oa, latlonGt*, hertz
I12THULI 3008
1
Downloaded from http://www.everyspec.com
*I L- ST D-l ICIA
LIL
●an;M~tncur‘in ffEr
TCU:
.
Wgan,rtzIfoue-stirred ohmsinout Power La the wa.J*-st*rre6 chbmer .hes PCUT IS LIei. g .e. s.reoIno. t DO.4r to tme ●aoe-sctrred ch. moer .neu PREF IS being .e. suredAverdge LMI. er over on. ●ooe-ll!rrer ..t. LBo. rec. t.aa o) L.e connector““o,, L,$t
3. rcsr EwJl Ptfix7.
3.1 Sc.er*l test .auipm.. t, Tll, fol IO. *”9 equ, p”at ,IMl I be “$sd for th!sc■9bsurc=ents. CII.rac&urts Llcs are desc,lwu t. 3. 1.1 tnro. gn 3 .1.5 for Lne ItemsCD*1 a... *.rcic. 1*. ,.q. t.e.. nts.
i.v.t i.peu. nce of 50 on. s10 10 L4Mz.
a
METHOO 3008
z
Downloaded from http://www.everyspec.com
...”
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I1
Ml L- STD-l 3~4k
● .-. 10 Septeznber 19803.1.5 aecel.er. This ●quipment ●ust Mve the Sensltlviw tO •etlur~ the SSJ1l
slgnal$ from r he connector lconduit ●ssembly. for ● wade-stirred Chamber w$th a !Ouer
usable fr~qwt~y af L 611Z, eke recet.er ●USC nave ● sens$tlvlty of -90 dnm to measureShieldtng ●ffecc$veness values of 90 CILI from 1-10 6Hz. For use of the ‘Continuous
s..pla Averaging- tecnntque, descrioea 1. parayrd Ph 3.2.2.2. 1[ 1% tiesiraolt tnat ‘her#calver have ● varlable output time constant capability for slgn*l a.erag!ng. A\OCU-+. t.ub1Y2w, or ●w$vakn%, has 111* specif~ee \e. sl\i. ity a~~ the *Arla@\e
output ti,e ●lla constant Capaolittj.
3.2 Soeclal test equ$mant.
3.2.1 IWde-stlrreo Chamber. TIIi$ snail De ● shielded ●etal ●nclosure that has a● lntnua shielding ●ffectiveness above 1 6HZ of 60 a8 ●s ●e~$u?ed by III L-STO-285.Mod, fic. tfoos to the chamber tnclude installation of an tnuut ●ntenna, reference●ntenn~, ●na ■ode-s ttrrer. Requirements for tne shte)aee enclosure are contained tnAPbend IX A. a10n9 ulth a descr>otion of tne require< I oaif icat ions for conwertlng ttto a ■ooe-stlrrea cn.moer.
3 .2.1.1 J~.. An input antenna shall be prOvided b“y a 10n9 wire (>51 axtoe lowest test requency) installed along the 5ides of the mode-s ttrred chamber. AnImpedance ■atcbtng taper can b. utiltzma .t botn ends of this long wire ante... ;0●ffectively increase me Oynamic range of .thc ●easurement $Y$te=. These tapers arenot neccsstry ha.a. er, for proper ■oae-st, rred chamner ODe,. tIOn. Constru;; ;~n ofthe ●nteona clong mlth its ●ssociated tapers IS aescribed in Appendix B.installation of the ●ntenm. in the ●ode-stirred chamber shall be 4s eescrlaea #nAppenaiz A.
3.2.1.2 i3*fer*nce ●ntenna. A reference anteand, ioentfcal to the input antenna.sltall be !nsta) led in tne ●ode-s ttrred chamoer. In%talldtlo. and conitruccion of the●ntenna is aescrined in Apoenaices A and 0.
3.2.1.3 Mde-sttrrer. A ●ode-stirrer $IMll D* $nstBl led in the ●C.oe-st$rreachamber. This device say oe Constructed from sheet aluminum by using simgle handtools +1 eescrtwd in ApBendtm C, Wttf! (nstdllatton of tne wee-stirrer aescri Dea $nhDpen61x .+.-.
3.2.2 Data collection system. This $ystca. NI14CII Includes the recetmr, ●ust be. CSPWIIS of cIbttinin B an ●verage of the signals from the reference ●ntenna *nO Lh*
coattector]canautt assemoly for one rotation of the ●de-stirrer. k trn-channeliyatm will ●l low moth ●easuruents to be taken Staultaneously. Measurements tn the●ode-stirred chamber are ■ede by sampl Ing the signdls from the refe~ence antenna anacoanectc.rltonduit ass-bly as the Bone-stirrer is ●oved tnrougn 360 in rOtdti On.The signal ●veraging can be accomplished with the use of one of the ?ollo#ing datacollection systems: (1) Otscrete Sample Averagi Og Systt8, and (2) Continuous Sa8PleAveraging Systea.
3.2.2.1 Olscreta samvle ●1eraqtn9 system. TIIis syste.. shown on f$gure 1, samplestne stgnals. at i discrete nwmer (e. g.. 2UU) of ■ode-stirrer Positions. Each a.taValue. ts then stores fn ● ■emery device ●na ●n average calculated ●fter tne●easurement has been completed. This system ●ust ●lso control the stepper ●otor usesfor rot. tion of the ●ode-stirrer.
3.2.2.2 Cont$auous samPle ●veraain9 system. This %ys Le... Shwn on figure 2.cont$iwously rotates tne rode. st{rrer *C a ❑mzerdte specs .ttn cm sigtwl a.eragea inreal time by ● device that ha5 a time con$tant .nlch is ●t least thrae (3) times10m9er than the time for om? ■ode+tirrer rotation. The receiver ●nd averagingdevice .ay o.? the same ●quipmw,t or Separbte. This averbgi.g sjstem offers thesavant.ge of reduced test time and a Simpier aata Col Iect ion Systea.
3.2.3 Mode-stirrer motor. For the ‘Ulscrete Sample Averaging- system. a steeperSOtor .*CII saff iciest torque sfi.1 1 be used for rot?ittm of me ●ae-stirrer. AVarimle speed, continuously rotating motor snal 1 De sea for the ‘Cent ,nuous SampleAweraging” system.
3.3 eteasure8ent frequencies. Measurements snail be t~ktfl ●t ten [10) lrequenclesin the rar19e from 1-10 61tz. lne frequency intervals shal I oe such thdt nombwrement frequency ●a) l{e .ithtn 80 percent of the next highest or 125 percent oftne “eat lo.est measurement frewency.
● .
METHOD 3008
3
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MlL-STO-l 3uA
10 September ]9RI)
OA TAST;&~EOIOTCR
COLLECTIWSYSTEM
I
I
‘ Moo.?- SYIRREO!jlGNM.
.SOURCEJ
CHAM8ER
METHOO 3008
4I
I
Downloaded from http://www.everyspec.com
I
❑IL-STO.l J@A
10 September 1980
PRECEIVER
REFCREUCANTENNA
.4+
~Cu T MODE-STIRRER
–m
INPUT ANTENNA/ I —.
35J*-E I
‘o METHOD 30085
Downloaded from http://www.everyspec.com
M1L-510.1> 44A
I
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I I,!i
II
I
‘i
Ii
10 seDtWfIber19893.4 PrepAr4tt0n Ana install att.an of cor, nectc. rlsntelaeo CO. U.8L .ss..sb)y.
3.4.1 Preg4r. ctLIn. Th. connector .“oer lest $n*ll De co.nec tea to tne snfela. dCons.tt ●.a, mav. tea on * chamber wall .s $~o. n 0. fig. re 3. The cc?. nttlor shall 0.10c4tc6 a Olstance. D, of one wave lang~h .atf Lne ..11 at tne Io.est test I,equencj.Tne I.”gtn of lb, ce””ecto, (co”d.tt .**c.oly $!),11 Be ,.0 .0. ] .a, e)ene Ln, ,, t“.IOWGSC test frea. encr. Aaaptors ●*J be u%ea to f tt tne conq. tt to tne con.ectarUmoer test. All resukting joifit} sna\I me per IDrIer. lIJ %ealea to oat.,. ●a.tm.a%hteldin~. llw pickup ire iosaue the c.”n. cL.ar shall be a 5.0 .0.5 Cs. ti.eterIemqta of tits c.nt*r co. auctor of the Cs.d.lt oDt. i.eo By rem.aviog me w;.. sh$. ld.The plc.. p .tre srmll be C.oslttan.a in the ce. Lcr of the Connectcm Ana hela in placeD# 0$91ectrtc retainers or tn* di*lec; vic i.serz of tne con. cc to..
3.4.2 install.tion. The connector tconauic Jsie.oiy SII. !I De sec.reis rastt.td toWI* c~uber .aI I .lMI the Cweult p.lsinq lI!r Ough tn. ..1 i A.a terminated in lJpe-NConnectors 4$ sho.n on figure 3. [4FC sPIo.lu De taken co en%. r. tnit the sftielaiaglntsg.ltr of the cnuoer ii ■.iat. t.ea at Cnc Poi. cs of .tt. c.ment of the coca.lt co[n* Cnam., .* I 1.
4.2 rfefer*nce reeks.. esents. w,rO.. the rollo. tng reference ●casuremen L:
a. Connect -the .q. if.q”c for E: A:S?:” G me ..erafw J tgn* # CO cne r. fsr. nce4nt*na*.
b. l.rmln. t. both end{ or thr CO... CIO. IC.QI. assemly o. SO-o IIm Iobas.c. hwl Y sufficient tnwt vo-e. to tat cnamo. r to ooser. e tne SIWI*I on tn.
.-e ferenca anten.. .a. 00La*? tn* *v*rage si9.. \ 17REFI on ch* reference .“ten.. for ■ooe. st, rrer
rotat ton.;. nword Iaia .vera9e wale 4s .,11 as tne cnatio., !np.1 oo.er (P,. REFI.
Repeat ●t aacn Ireq.encx.
4.3 Shield ●eas. remen; s. At tr,e s**e f,ea.. ncf {.,tmin 100 9ffz) 4t .ntcn cne?,fcr.”et ..,, u.cme”t .*’ pcrfor. e”. O,rf”rln tn. follo. ,”9 S,, le(,l Meaiurcs. crlt:
a.
0.c.
a.
● .f.
a.b C61c. lAteu snielat. g effect t.en.ss. For ●,C” 1,,, fv,q”e.cy, C,tc”l’le LneSnieldi. g effectiveness IS. E.) 07form” ),:
tn< cc.. ner, t.r from me dm. e 4.14 .nd tne fo I 10.,.9
S.E. . 10 Icqlo [=)/(=)]● ’
t4ETHOD30086
L
Downloaded from http://www.everyspec.com
MI L-STO-l IUA
10 September 1980
nwnf 3. Preparat<o. ●nd installation of co..ectorfmnd.lt *IS*I. V,———— . . . . . . .- .
METHOD 3008
7
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RI L- ST U.134#A
10 September 1980
5. Docu*nrh TloN. Oata sheets smll contatn:
6. Suluus v . Th* follo. ing Oetltli $?, *II w SDeclfimo in tne indiviauats*willcati Om:
a. Fr.quemc$. s to be test.d ,f ocner tn.n ttmse listea in 1,:D. Sblcldin9 eff.cciveness of we connector p.ur.
METHOD 3008
8
1
I
Downloaded from http://www.everyspec.com
e #! L. ST O.13@4&
10 September 1980APPCIIOllA
,01
Of SIGn LIf WUE. S1l IWD lfST CHAnB[K
10. 6*n*ral—.
10.1 Tf!e ●oae-stfrred techolque .Cllize% a test chamDer .nicn exposes a test itemto statistically random iac ident ilelds. 8,, iC, tl,. [Ill% tCSt 9ttf104 ●#Dl OJS ●inle10*6 te$t chamvev cOnftgur*a to assure the ●.ci L4tt0n of statistically rdnao.f,slas. The test cha=oef IS asxntiall, a 10. 10s$, snteldea enclosure ..sch .AsDeen ●oat ftea by tne $.s C.lla Clu. of a. fno. t anten. a. reter. nce WC*..*. *.6 *●ooe. st irrer. Oesigos for thesm Items ●re Dro. lded In APDenOtces 0 an’s C,respect ive,. 6ufdelines for 4nt*9ra1fn9 tnese $tems Into tbe chamber 4re prov, aea1“ CIlls ●wcna t..
20. D. Sian ,. Q”lr*Dent%.
20.1 Tne ● 1*1*.11 chamber e+men%ion SIMII be at lea~t three free space .avele. gt. %at tnm lowest frequency at wh$cfi tests ●re to O* wrformca. In *.aalti O*, tne ● i., m.=atsta.ce oet.een the test Item ●na Ins cndmoer ..lli snail be at Ieist one .dvele. gtnat cne Io.est frequency at wnlch te*tf are to oe per formea.
30. O*t*i 19a orOc*aure%.
IU.1 ChamOer enclosure. lhls shall oe a snietd.d ■etal enclosuve .rmse minim.msnleld{ag *f feCtl. eness dDo. e 1 GIIZ {s 60 a8 as ■e.s. rea Dy Ifl L- ST O-285. Toe Cnamoer$Rall Oe Con%tructea of lo. -\oss .,te, ,,ls. Lossj ●ater ial% s.cn as floor Coverings.tan ties, ltgnt .lring, etc. , snOuld De elimtnateo or ● int=t aed to the ~a.,m.* e=tentpossiole.
30.2 access aoor. An acc. ss aoov or panel sn.11 .* D1.cea I“ a.e ..11 of tneCll,mo. c . In!% ooar than bc lar99 a.ou911 to .110. entry ef tn. lest Item ..0 shalloro.lde S. fflc tent tccess for .0r11n9 .tln Lh, 1.s1 ttem. Tne 60 au snBela1n9tat. rtty of tnc cnaaber small O* ●aintatnea.,,,,! .,,, t“,’. ,.., vequ,r,”llt,.
If aaa4tt0n*l soars .re req. tr. a, tnef
30.3 Input antenna. an taput ●ntenna SM*I) O* P* O.IWJ D, a 10.9 .sre (> 51 ‘itthe Io.*s; test treq. enc, ] lnstallau .Iofiq the tides of tne cnaaoer. IWeaanceSatcning tapers ●*Y be utillzed at both ●nas. L*rO. t of the input 4.te.. a snail aeas sno. n on fi9. re h-l. III tnts ftgur., tn* trio. t IS orovtdea .34 A tyoe-fl b.l. neaaconnector [!AF po. er lnout J Iocatw! ADvroAimatel Y Jt the center of one e.a of Cnecnamner. i.stae che cnamorr. the centev cana.ck. r IS c.anmectea tu . t.c.e. .btcnentenos ai*90. *11 Y towara [n* .c. oer rignt corner of Lhts same all of cne cn. moer.at tnis Poina. tne taper 18 con..c tea co I 10.9 .t. e tnen ge.llf oenas are. nu tnecorer ●na g80.uetric*\lj osc}l tat** t. a p,. ne 0ar41)el to tne siue ●l! of tneCnamber. At the far ens. the long ire 9entl J benas ..0..0 the corner ..a 3$Connect. a Lo * secona taper t*rmtn. Lea t. a 50-.ahm 10.0. SLd.tiUft t.<.ihtors of ;::J10. 10ss, s.c. as styrofoam, shall II. used to support L.e long .*CC 4.0 tapers.Ots%.nce of tne 10.9 .tre from the cn.moer ..11 sn.11 D. .s eetevf?t”eo t. Apoendl.Lt. T.e aistance small me ■aintstneu .41cn$n a \O Dercent toler..ce .t all l.<.l,O. sc.cept wnere tne trtnsmtssio. Itne oeno~ *ro. mO . corner. &t Co? fle,, , the )!”e Sn, ll0.? V*. C to Pro. tae d smooth curve are. no l.e cu . . . . .s sno.. on ftq. rc h-2 so as to●cn, e.~ d **0,.s of curvature, H, e9ual to the EJDIC. I o,st.. ce neL. e.,h the 10.9 .Ire*rite. na alla tile Ch,. Oer ..1 1.
30.4 Reference ●ntenna. d reference ante... of the s.me length *9 tne tnc...tentenna shill oe lnstalle O imsiae lne cn. m.er. lhe atst. nce of ctiis an~enna from IceCna.oer ..11s is We sm. .s for te input Ante..a. A t.gqest. a I.youc ,% illustrated?n f19.. e A-1. The aestgn and faorlcatlon of tnts dntennd. .lo#g .Itn Its as. ocl. L.d,m#eo.. ce matchimg tipers shill bc tdentic.1 to Inc iac. t ●te . . . .
30.5 nooe-sttrrer. A .Oae. %tirrer, .s lnotc.led . . ftg. re A-1. fm.11 De lnst Jlle9l.sise tne cnamwr. the ode-stirrer ●ay O* c~nstruc tea .tth SB*DI* n.nd tools .soesc., oea in Awenai. C. 10 ore. vioe .otdc no.. lne ce. ter of the moae-sttrrcr ,5cOn. *cwa to Lne center of * no.cunu. ctt. q roa nose OB*U. L.. IS 1.ss Lha” \ce. ttmeter. A .ael. l tune shall De ol.cea In tne r.n. muer ..11 for 1.< ..0 !. ..11
I
METHOD 30089
Downloaded from http://www.everyspec.com
i
lfl L.s Iu 1144R
10 September 19~n
UI* Cnammr . The lUOe StiJll hive ~ 94.,... B. SIL!C di. mete. of 1.0 ce. ts.eter and .length greater tnan 8 crnttmeters. The ●etal 1.0. ,ftall me elect rlcatly Dondeu
$tO~;ereO 0. .tl OeOl around its ●ntire per ILIIIerr
to tne cnamrwr ..11 ●t the exBtTnis 00IU shall Preser. e the 6U au snl. IJ.U inceg. ,ty of the ch..wr. The
.wr. sttrr*r, may be vlac*O Jt any co.. en, ent Ioca Lion .ttntn the test cn.=ner 10qtt. tzt a.atlaole space for ;estlnq large test items. The Qistance% of thew09-stirrer to. tne test ic*a, ar the .* 11! of tee n5 cn4.ner a,e .0s critical ●s longas CWI? is no *nwrf*renc9 .ll II rocat lo” of the ●0d8-st4rrer.
30.6 lnw&llatlo. of test item. The tQSt 1[.9 Shill Oe Pt*C80 in III, Cl14=Oer 60that lM f- rtes; d1st4nc9 aet.een ●ny POtn L on tme test :tem and 4.9 w cb.mb. r ..11is at lust 1A for thn lo.est t.st tre~uency. Stwofoas *fI*ll he .ss0 to s.pc. urt Lne
.c{9mt of tflvta>t It,=.
59411*S1 test cn*mb.* alm.ms tom . ]. . 90 c.titt”t.,~ . O.g .eter,
Mtnlmu. op. rating frequency . IWO MHz
METHOD 300810
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I -.
1.
I
I (
I 1
0I ,-1
I
lUL.SIU-tlMA
10 September 19W
-dc1 c- vm.
FIQmf A-l. we stirred test Ch.awr.
METHOD NW?
11‘o
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I
-.
1111-S1!4-IJ44A
10 September 1980
\\ H
\
LON6 WISEAu TE41#A
H
_ MS CMAiAEIER WALL
o
flGURf A.z. Trmxi!slm 1itw bend ●round ~r_
WTwm 7nn8
12 e
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I,1
\
I
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1:
Ml L- STD-l344A
10 September i980
METHOD 3008
II
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iI
I
81L.s TU.134 AA
10 September 1980APPCISO[l s
0fS16@ PROCEDURES tOII LOf16 UIUf AMlfBn45AfLo iWt9hXCt ltAIClfl RL TAPIRS
lU. tineral
10.1 10 mtn$mtn tnput power r*qulr9*ents 4na ●aximize iest sensitivity, imveaance●atc01n9 tapers compr$sed of . section of taoered trtmsais$ion ●ay be utilizes atbosh cmas of tne input .IId rrfere.ce antenna .$ Inaic. tea on figure B-l. cor cnt.aDDl lcdtion. t#perin9 is accomplnsbea oj varyin9 the spacin9 bet.ee. tne I 10 AuGconstr. ctlon .Ire .na the ..11 01 the ■oae. sctrrsa ch*mDer. The purpose of tnetapers Is to enable the user to ●ake ●ore ●fflc tent use of the power a.~ilac.le fromLhe saurca. lne Procea.re% cOtW*i.ea $. this sect ton are for 10.9 mire antenn. s ●ndtapers dmsl nma for 1ast411ati0n in cna-oer% hose lowest oocr.sing treauencies are
8Ioull Wz, 5 u ❑ffl. alla 200 Rlfz. If a chammr is aest9ne0 for some htqher f.ea.encg.tbe aestgn orocea. res for tn. nest Iow. st rreq.cnc~ sal 1 ae .ttlizsa: l.c. , ●WJ800 14flz chamber SIIIJ.18 use trm antenna and tdver de%i9ns prowiaea for 50u Iftlz.
30.1 Cba=ner Cfesioned for 1 6flz. M $Siown on ft9ure 8-1. the 10Lo I length. L,,of the 10a9 .1,* aat. nna .Ita tapars +ttacfied to botn enas sR411 De *t IeJst 1$,0c.mci.. c.rs Kcora>m9 to tanle 8.1.
30.1.1 Lone wI,* Warismjsston II.*. the Inngth, La.2L~, of CM long UIretransmtssten 1(s. sS.11 b. berJg*r. if a* f.assarJ, to **tlsfr the ● tnimum overai !I,”9CII r.q”trcn”t ,, “.1; ,, to p,rm$t .,, * of I.stallaclo” 1“ test Cn,.mer 48oascrte.a !n Aopendis A. As shewa on figure 1.2, the eastanc*, t+, of the center oftn. Isrq .$,. fro. tit.cb.*e*r .411s .9. ( I 0. 1.5 C.ntiwtsc%. Al . corner, tne .1?8shall b. @ant ‘s aescrloaa 1* hpwnal. A. S94cin9 imall be ●cnlevma DJ the ute of10” 10’, at, l,ctrlc ,p,c, r$ S“CFI ●, ,,,rara,..
30.1.2 ImPraanc* ●atchtl”. In, l,”gtn. Lr. of ●aca imomdaaca ■4tchtn9 tap.rsmall D# ti. O cemttaet*rs as masursa fro= me c8nt*r d? tn9 type-U connector to thelong .Ir. tramsmtssio. 1 I.e .s she.. on f iguve B-2, AS ●.Y be ICWI in !IIIS fi9. re,ta. cur. acure of the tamr rasulc% In the ●ctual len9th. I T. of tno ire from ●ntcnthe tap*r Is co.structe.z to ba sliqhtll 10n9er than LT. For UIIS frequency. ~
1-10.8 c9nttmac9rs 4s ●easured from the ●no cO. taln1n9 tne connector. Oetalls o thecoaaaccor installation A,. she.n 0. f 19. re O-J. 140 Ie 8-1 *u.9ac izes tee 4no*eO$nnstons ●na Pro? iacs todtttonal eat. fo, construction tne ta~,, ttself asacscrl Dea !“ tnr fol Io. l”g eroceo”res,
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RI L. SrU.lj.4S
10 Septefnber 1980
TASLC 8-1Oeta for constructing ,.peLI..Ge .*zcn, *~ taper
1 GIIz Cllmber
L, , 150 cent tme Lers
H . 7.S centimeters
LT - 30 c-timeter>
J1 . 30.8 centimeters
3u.2.1 LO.9 v$re tra.s.lssion l,me. l.e alsc.nce. m, of the center 01 tne longire fro. the chamber ..11s snail oe 15 cent ta. tcrs.
Li
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METHOD 3008
16
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io
nll S711.1 144A
10 September 19~fi1A8LC &-tl
04t* for constructt. g tmp.sadnce mdtcn!n* taper
500 mmz Cllam(ler.
LJ D 300 cent t-eters
H . 15 ce. tt.eters
LT . 60 cent l=eters
Ir . 61. Y cent i=aters
LEsl0.0
1!::18.024.030.036.0:: .;
54:060.0
n (,] [q
0.050.13U.l?U.220.32u.a90.781.172.655.81
11. B7
10.3.1 Long wire transmission lime. The atst. ”ce..I 1-e fro. [SC Ch,.m?, .,11, *“*,
It. of the center of the longDe 37.5 centimeters.
3u. J.2 l=o*da.ce ■atchtoq taoer. Tne len9tlI, LT. of etch tr. nsmisslon It.et.per shall be 50 centimeters ●na the correspond,. g 1 T ,s tss.1 cenli*eters.T4D1e B-111 sumJrlzcs tne *Oo. e Ot”nsion$ ●nd proviees .Oaltional adt. forConstructing the t.per itselt ●s O.scriaea ,. the Oroc. d.res of par. grapn 10.1.2.
0.015.030.0.45. U60.075.0Yo .U
10s.01/0.0135.0151J. U
La , 75o centimeters
M . 31.5 Ceoc, .ete,,
L? . 150 centimeters
f r . 155.7 c*ncl=et*r%
METHOD 3008
17
0.05U.130.17U.250.36u.581.U21.984.41
11.>>]l. ]1
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I
—.
MIL- SID.134 aA
10 September 1980
: -MOOE..IRRCHAMBER WALL
I
1I
1’1t 1
e LT ~L-2LTI
I+L+
I I
I
‘1F16WE B-1. ~iul cr. ml=is iion lhe .Ith mow.
METHOD 300811
●.
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1.
IWL.STO-IJ441
10 September 1980
alo AwcCONOUCTOR CWDUCTOR
I CENTER LINE,
~ ‘“””
------.. . . -----
;
/
,“c’i’: ‘ “ ‘“”
hld
TYPI?-UUKHCAO
1 ,4
CONNECTOR . --.L- J~x ~
I MOCE-STIRRED
~LT~C14UIBER WALL
_ lAPCREO ; LOW WIRESECTION \ TRAMSM:SSlON LINE -
I
flcusc 0.2, I- ncr -tchlnq uuer.
,0-+
METHOD 3008
19
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HIL-SVJ-1344A
10 September 1980
NTING SCRE’W5(4TYP)
S CHAMBER WALL
BOTTOM
w*IO AVIG
CENTER CONOUC TOR CONDUCTOR
E~TEWSIONlS REQ’01
US CHAMBER WALL
MOUNTING SCREWS (4 TYPI,. ,I TYPE-N COUNEC70RFR -y
CENTER CONDUCTOR
SIDE
I
FWEE B-3. I ~nce mitxhi W taer: Section A.
I < METHOO 3008
20
‘
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●1-
1 I
MI L-SIO-I 344A
10 September 1980
* ,0 AWG
●.o ●
● .0 ., . Comucmm
CC%TER LIMC
4.0 -M
?..0 -
0.00,0 10.o 2.0
x -i30 60
X 01 S7M8CC PROM CCMTCR CCUDUCTOR (em)
11/2 $: AL I?)
METHOD 3008
21
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