BSTJ 50: 7. September 1971: TH-3 Medium-Haul Application: Frequency-Diplexed Auxiliary Channel. (Knapp, J.W.; Seastrand, K.L.)

13.1 MB·English

oni 2 ane Des

TH-3 Medium-Haul Appli
ed Auxiliary Channel

Ry J. W. KNAPP al KL, SEASTRAND

Manvauirsesve Pebiey , W1)

Frequeney-Dip!

40% panes doers a mnare of ecosoeatn ang ui ley VE
Geos fo m seracn ron spe in edition tothe replaced
pals hs enti of th ete se ayo ao exior nna
(1 TP sopeatecn han sng the payed signed te bowbund
aig itinerary

Pain’-tnsuin wlewweave radia svetens zeqsire surveler and
snaintasanen to ineur hieh-nuslily prformeaes and reliability. Tris
J neoorphei by Tnsing motes Se rac of the radio etcione to nn
onderew’ve forty aul s mureailance and couse! syster. we wol os
Seaee rrioue speci parner vials The elertrion aval nsntite
Soil owe rivet ijoirallyeazeee zo und trom thera teins
BUEILs yoiee-ineniswy sicrlls Phter possib.e aye of Crane

reine those sigcle ars te surty Ul ave vice Leecuoney Jase E203,
fn a roparate micnewaee ola, er deally on the paylocd micros
teave ean.

Ten Ti ae been widely wo inh pa, bul have Use azajor
Aisedvantages, Of Fe Taal Thee In-scon vedio stations may follow
fig tests re user & wide Yascty of temamen svelte.

Secondly. they ave slativaly earls, expecin.y it eoneretion ef new
lings jy reysinal ta juovide sense et a remote cae station. The
fonomien of ecet is yseulate ipo=ant whew one rks abou: low
vig tone mere the ear of The eqiprea reyalze la

peviona shes fareoae ie spend ever Timi tne 0 Te yFore
"The nse nl sepavece mierewave cbganel fauigry cel) ba
xine poouleney in reven sear ney roves trangia
2288 wn wong, AYSTESE TcAESTEAL SOUL, SLUNENOOH 171

ver a snuck more Bishly vooizuled medium than dors comneston
fivmgh misellaneons land nes und cokscouonrls ie meh acoRe
feliahie and of tory gone pestozunnes quality. To ality to
Ue emia wipe, ths ape of aus ebucnel eure ee
ssite rofly nnn ill, sae weriving squipmicat ut cut ado
lation, eonseqnen yi ie ele Fainy eae

‘ee third alernalice of tiny Ue papleed nierowuse zedio ehuandd
a camy the aurveillasce stil oon ‘ol siguale ie sebahlo, bat good
‘uelizy tnaveaneon, sna ithe rt nee in cst. Tag ae sien,
faio as fe teapemission vehicle net oily por vernonia advane
ages but elso simpli rantesacee sinew ne searat rai ure
cles tai aeeivers ane roger, ‘hie poner eanae tel wich the
Mlovelgment acd pesformaee of wu auyifary Ante 0 thia “spe
fhe inmuereyeipionee egaliary heel fue ome yeh Che meine
Tas applion on of TH sack

1 Copmsty

"The meal eaio ayes rm yo or chwe YE wanes
sion nena aecvine cuits ta azeolia ae wovesery ainteaance
tne cone iertiens, The sarveLaace soil bnco0" ete requicee
tno othe VP civts, he radie ander vive (order wite) another
AP eicent, ra, if mptiped wits em expaces radio unler oui
thizd.

Te asaiion to the servis ete, anather eategeny af sine: 36
torrets neeful, Ezequoniy tu spate alain ate Toeated nace
sivall platen esnsere whack re aban! Tem Dye ilies horn
All slang centers souls be oonted. [0 ‘itor mesh af rom
treed tire anit eau be Snexpersive'y rao
on valle staina to azar slong te soe, tele ercemie
svizgs could be had, ‘The Leceuep-diplexed wieliory chanel pro
‘eee is far'y top Someysight VE eizeute) without inearing
the cost sl ules sevlly eeanndlatng tee overall raplone! sina
fn eqaiopicg thie lation with maeler gtoup wltpioe equipment.
‘The ouly su plex rapa Phat neeesary t aecomanedste the
Tonty-ighs ereaits

2 Perbwance
"Those qarstons 2 aystous leh, sine peformsner, al reli
sew ele erleted; eligit stories in ome sonia ye ella
areuney crasin p80

née unin ir anothes. The octyl ene Saeshoul aly
Similar any reqee's lo oe shor=ham ezomave endo estes
fuck ge TL and PM mienmrase vaio 12% therefore og eal lo eon
ser esfrmatnce objertives sioilar to those aot fer such system
"Tie corresporle vo 6 nisin Leogt® 62 250 rllos and 8 nie
ebjective of 5 dd. Tae TH-8 aetna pul system per.
Soraance ines based oi ¢ system Inge e2 1000 malls” While
Tsk maybe Kite ta 250 ile, terres nse o cary order-
wie und harm sgualeanay be required to traverse che fll 1000-mle

mages ‘Teefore, on a system meting the bueklul poise ebjectiv
the woes cate alte pevfornuce nt the server ezeuiza wosld be
{Rene "Phi pesfermnce is more Us adequate forthe order-rire
fuid surveillance and wont ete,

as Relititity
Anothe: inessore uf unilcry ehanse! porformares isis relict.
Sine the misrowave radio itll exes the avuliary chattel, ac

ftege of the hesie radia system ill affect nct only te pasloed, but
the ears change se we! The nfed tor good ausiiery chen
inliaiity exits sree she iackaol sirelte see camping eamacecal
Sdnouie wel the seviee slzeute are need batt ior mainconsnce and
Slam ertin, Tse “knewey ené~to-ens antage abjestive fort 280-
hulle worn eyeam i OUP peceer, A Ul-pereent et-toend
twink abjetivetherlone ie segsonable fora 250-milebaake-
Haul eek, ‘This would alse bo aecestabie fer the ordes-wize nd
alas exes

Another eidevatin, bower, whish dees act apply to Filial
neighat installatiors, but sua in The neu fate, the nrossiy
St the saxiiary chanel to eunry wotral lane for he payload peo
festion evitehing rien, Tilal aaiaaa-baal epplientions ere pro-
feted un a one-foe-one ais atl da nol reir culo tores tne heat
nd svtehing, Eutuse applietinn of awe type 9! fora prateeton
Eritehing would however require le ausiiaty channel te ean this
‘ype of signal Ou syste of tis ‘yy whiabibty abjetivescypially
vaste 20-peruri-o” the tatel tacin eystem entage tue $o joint

Dulas of the auniliags chanel, Byobabiate stidce indicate thie
Nhjesive sen be tebievad te asliany vane onege ie not renter
Shen O02 percent foe 20 alle two-way. This grcte of reliably oan
ine echiewsd en the auliacy ehanme! ii ie esrved Saal ecusly

ver os RE ehanne’s a le bel erie seers etamatea
2000, un wre. SYAREAE-mReRDTEAL JCUINAL, SUPREME 171

‘Aamning such 1 ene-r-ute oroleeln svtehing azungement, he
facie margin of the saiary algal rust be at act 36 cB

24 Pesived Ineracton

‘he hove systen. objectives all concer arcu che axiliary cha?
performance fei, The oles of wr cuiliary chaznel ex. tho noise
Performance of she payload sul mel aise. 5e conrvencd. The
Ipreence of Uke auiaey chancel rae: aot enuse excessive distortion
fo sie paylond sipal, Size the stinsy channel sigoals avi the
bros pslenlsgnals see join earied over w commen feclity
intermodulation lfsi sau wail do exist "To realize tho. benebte
forded by using © feequamey-iplenet mosiliary channel, 10%
inereuse tthe paylaed eee due to the presente of he sinny
channel we judged ta bo sn aceaptable traceot. Thus for ea. 1800-
‘channel, 1090-nie alin aytem ene ith ally hid waar
channel slong the entre rl, the nei fa @ payloud creat eoald
Increase fens the nominal bivalve 0786.5 alioned® to 86. dno
(will be wen however, the peNormarce ultimately realized degrades
‘ike wuss offend paplooe! chaesel by less than OF dB,

wert! sacl Ieeigute, sus 2x AM, PM oF PM, git Be
enplayes to nnsllave te ailiasy shuns! toate en-0 “be ey
Twat sacio chontel. The use of ar FM or PM rooduluian process
sakes iz possible te nut ur noice perormanes cemanded by tho
Trekhaal crete, Sines che bebo sigeal iv clo FM ow
fvtn the radio eaanal, the Va suslingy wane] signals rt Bt be
Shifted to an onus portion of the heschacnd spectrum aed then
‘mixed or dlploxed wit i

3.1 Auatlary Channel Spectun

"The choi of Une sift or dlnlesing tequeney is dependent on sammy
factors, the most inynstant of wish Ge the bascband Erequaney
scien aesupied yr the 18W-riteuic payload sigusl. For TH-3
tediuarhaul ayeteme the huscharst apeetrum of the peyload und
elated signals slow in Fig 1. The sigeal from mestergroup nat
plex eyulpmene yee ed $e conjunetion wih the tia aye
Crougiee ha! spactrur O. to 8324 MH, Ty some mediom-bul
lapioasionse°TII-8 eh es video ce aes serum is accused
Ssratially tn do, alow se wasiliar chanel too uscd web any
sarmmrany omnes 22a

Vig. {ATI mest ula Bae arent witha ware
of theee apolieetions, w dintexing tonutmey above she paylasl ie
eyo, Avtrsing feisty ovate thar 10 BL eso desir

[slhougls ‘THER Tos wade besrheadsandedth owt vo xbows 12
MIB Tis, 1 slows tat portions af sue pees betwee 10 aed 12
Mille re ueenpiel o> wand foreneher pagpnses, The 1% 1 ynwleclion
Fsitoh the tie sudio syoent wna I7-sMa nie alah ct 12 Nz

fol e p's 6 11.8R AIlLz oo roatol ewiek.ue logie Tx aia, che
Spectra at WAT #0150 RIB nar: be cvuaed eee, pais
far ae in this ryion gnde> vee oomiracons ef vaio nel
fayieneice, Bored ex. these cite iw atl IU vod foe em abealshs

twisiznan bandwith of 200 1ITe + Te gnviea ard back eres,
the sperm belwort 107 wl THAW MHz mse be used, Although
the evailable anid t's -ypinw ie ahon= 1 Me, the ues

pettins floss tt the, "The bazaath yi Ue in tal ig
Aioul he hos dle Sd LF se Seep A iterwulcntion pou’
Tine ve second-anter nuilinarilis beh to» Innnr oe ele) ot
"a pasa

he Beal Traqueay choise éspenss on the medulcu- toe miyses
ted te ies the sional, I Sn cae, ft0-Rep Meaktion sree
Jeruse! lo Tessie lie ind VU events ta Fig eM ee
"Tiesto. soy cf med tion wlan conc wal BRE, wappecel
coivor worileans to sae che ST isu ty lerdal re
fouerey tongs Tor ceconplch the sew) step in? anaulaien i

Eby Ne Hoo 280 KUe SSB ntlepes eoectrans ta tie TM
eon, u doable sla) supwenvad czerer® poorest war sclecec
‘The csisien ure DSD-AM we in Ten! Ia the sity 20 aehieve
the dipling secees woth? the wwe satin with a rari
eis snd easily eeliacd Pits. Tie his wvallation seer
‘be ign alg enuriea He gum (sume eeheee, sae ed
cowl frsensney sot
2202 uw vant ersomae TRIES. seated, GAMETER TL

It in aneosucy 1o elel ty ena cca.er foqueney of the DSB-ARE
smado.cor wil syne ove Te vliminstr wore fateierouce “nu the
orma’ ts0o-riceait payrond (0564 AAD! Alls}, the eillereuse
Teurces He TLAG-RIIT seateking lle! aud the subecrie shoul be
ae tht O51 MH, also tar slow spp” ealim weg rukipiexed
Falls signal in Ce spore below £84 KM the sare (4B
‘rose: sboul (ll x U's para bal beta #32 -ELLe eats, Pony
p minimize iatrtereaee 10 & vita algal, se prude slut be an
‘vid tiple of thy Tolling rate Cc, 18794.2 Lisi + Considering all
ae festore = subearice rect ey nf 11ARIR0R BLL evolve.

ign 2 chore the DSH AM evetrum gecerotes by the eae
‘vodilatioa pects sat, Tie ie sigval whichis ltutalsdiphexe
ttn te eo enn

2 Soe Pefavatanee Pairs
“This sescion ccvelops the seluccabire bubweer the auenes
sleviation ol the ondio easter dup to the tlitsy mie sgnel axa

‘he amiliery eagnie, ruse psfarno nt, hi pres Te Is for
fleting tie easiary ebongel deve, Taving derumiond Os cel,
Fite ooneideeatinns anh aa nee cuute actions of the apleng

nmi ord the sists of the ats liacy elma! er Hap Trion
‘pep te evan

2, Pein faguceot

"The sii Doedomeaner of che auilney eae! Rt
Je dimly orate! ta the ang peer sans. Ce Out af the
Sodividegl VB siete, hie rlatsiy

Wy = Wb ss] aT, w
sabre Sethe seas noise i lint Fee sak af sho YF chanel ae
Ahewsural ish Chanenage mein wl eevee Iu vem Leneeie=

Sow level hei, Ay be eae em fen oF the sige

ig Ai ohana Be DEA
suntan enn a0

My = B= eS oo
‘ho signa’ § i se 18 power is eagla mesg ene ving the
vonage, suey lie-t ay msvsural tho ootpnt of the VIE eva
Folate tn men seasnesion ceed, The ohe-aelr ofthe sigraseariec
Up ube ainile-y shame i presi nowy sions reels Ia
[S; being equ to IF GB. ‘The nels perfurunives en i Te
cepeese

Way = [i = 8 = X45, deen, ov
Wow fie winny eFannel # came! obur 4 tniebas al system,
lle eke pertwnianne atjeerve te a8 dBeud, The eyastlo-noles
retio wi. then

WS — Noe 2 Tus = 30a,

ince « sylvain vats is eine ecnldered, the eeforente «0
sacra seers loved ray e dizegurdes.‘Theraery ip lnrms of
Sigoionuiae vstio, dinery at tbe dewwdalated YP vail,

(= ¥hup 2 38 aN, o
‘The wuss evel is Hiplrses once ze nude ests ew douse
SVba ABL proeiss; shoteewe, The yuslaelee en signetc-rolse
aig i ally 8% greater thea tee leublesdowpreltertion

Senco no's satin” Trevefan se pes exes size le-noice abjoe-
fer nba pits thecal ofthe DSL gern tim primes i the 1M

spe
© Vise 2 EB. os

‘The insane sins’ “vel tle will give this egralsto-nose ria

com ecsleminet once the aagultacs of the nate aa> been veal
Yes Phe acliasy savenc. egal gs Vane a die nel “anor
‘eastisiow ye lsh tankplesing al diese, oar a the a
Wher cxctice ony His amdhcry tage, izle gr Tee sein ea
oseceson peth which caries vl Tie isin choad signa’

inl tie Tsheitout peyrone gue The aides! cpae eee
teow ssgive fa ta tralinty clare eigaal nd Sascefoe ie was
Sree tp heey tars ww sues eila 2b nina, Conesqaenty

fie whee portonamages W2 Uhe ously eyanne ened primarily

Tigres apt moe sation ty Se TE

sn 8 wees
2204 ee nro sosrene sac

doy vice ‘auntie By the “ai eystan at 1 Mule ‘the faloning
Alvelopment of ay exptesdon for Uae “oni elliany cheace
Alevastiea se sity tela dw efor a he teh dented

to the diaklag of che walling ein, The steualary
rien rosbvilasiena o§ tao ipleing equipmen: wi] bo eacsdorad
sepacacly

‘The viel af cho vaeo apetem being ronsicened includes one FM
lec pete acd len lig ewan ‘terres pears thapsl. och
the FMT tervals end she sain tanertereeson pine ase alge
eu. pulse sou tells, Hach of the a several hase

[5s as vadon odapentovt of sgetaoavin ythe agate. Pie oan
bo dee to shot nase, tron end ace, ae Lae py be the noize poner
featribead by this isha ivan the PME tana any be the
feeresgening contin af exlaIn

Ti fetsrmoduition oes yneoct frome within tha {S0eaitwit
fmytoedsipuat hick fe Fe naory anal spect, Teal
fb apport eet omeimbutur 29 the iMe rae Moor of Ce ausifany
Chamel, Tok py lie sto aoioo paw" contrite Ie this snesharsem
Troe PMT iemirals <x oy bo the eorspurving ocmusibstions
sina

52 Tntormobation aeoduets srunested Ly fhe presence of the
saci elarnet sie! Ue Ine og lou? an ivtngoting 3th the
Ta00-ceeu. sia) which fat inthe wnatin nowt poeta. Tia
is eonventional oul the insertion it, Ta go aa py ae
rise power eat vatn hy Uh ee wi fe te FRE Toe ane
rain 9p, epee,

“The bandiccb ane, total power of fie misihory chee signal
sielntiy lite st mae dew Ua eualrouions Fun alin he
Thine acegory (my and ul exe c2 seeonGary aor, Thorefoe
daly contisteious fos the frat tee yea of ie wil he earecrved
‘Tee sesoeured gem cepertes cer atthe pap will Siow Thin 0 be
seal apjroxinetion

Biuer the ake contebutioss beng coneviswl wre gpnenitad r=
Ipowivnily, fie tosenrable co assume taey ide te exth uber 6a 8
power Inv: Wurlter, He ower px, contributed by inci ranio
ope in. silty eye, will cerauulste ua 2 peor bass sce xo
cerelsien eves bese Ips. The iss aonceiitian pa Fee,
ray ehibit some orrenon elton bps, Basel or ie Parla the
rota. nxiliare hari: nee pe
unin cuss 2295

traen, ©
‘where ie the numer of rade Tops, i 4 causation eeeieent with
fs sua feom 10) (peme= alias) bo 20 ella aiier}

Tn cero appresite “Fl sige Mes nen Ue tars in aqeation
(8) exe suet rene tht iy afer perfarmence of the susibery
enum ie aust eoplele'y crprafent os the nage performance ot
the beeseredio system, ‘The noite shown wll ret fem she eol-
fective mamber u! haps betwee Toe Ieowshting terminal in the
Switebingserton and the station being meceured. Tf one isnot in tbe
enter of a etching vein Ue puuzber will difer depending en the
fieeton of trunnion

‘The shsolice mugnitie ofeach af the vase poets in equstion (8)
ie dependent upon wore sis ane manure in Ue eter. Tn an FM
rio system & eontenen way’ to eperse noice Tevls fer comparison

Pyros

[arpnee is to ase she ecient une frineney deviation of the radio
frtir pnodnced fy cath noise emtbulor. Since pewes ie propor
tioual tthe equase ofthe Tnejaeey ration, equation (81 map
eval

Ho fbahe Reet m

hese # nthe rm frecueny dation coremprnding top. Simisty
Ts aigue: power i proprtional low Teayercey deviation, #2. Taeseore
ont wnin mucha ch otal of te NT teeiver

he signal-tosaie
fan be sspresed

= Nv ane = 19 Log BF ®

‘wher Je ami fy are the ms frequeney deviations pnadueed by us
Date of signal nnd nose the ssa edmel LEMEe DSB-AM
spoctrum, Subelitling i into uation (3) ye:

©

hazaal per seit rms
ecaed te meet fhe ADBrned

peaion £0) is the dese eeu.
sderttion of te rollo career

‘jeetve ney bo dover ing sation: anor she camespondins
ue of fe 2 doermive
“To obin te dn eseeay to caloulst fy a serie of rise mesure

ments were mile The ase oa a edue lot at 11 MUle gt the FM
Feeciver ut ys eheseured sith ar thot wt INQ aie
2200 vu nota puSOMAE TRMANTEAL UHL, SREXEMBER 671

lol signal appli. ‘The eoatsibutions forthe FE veminal were found
tobe

Fu = U6 Hs (for 9 UF bl eantoved at 11 MDL)

f= oro Fe

Te meurennite ss non che ile noise eactibuted by rain
hop fi) to be APS Ha, Ser thee oazsurements wore zo oe
radio sje caving 1 UT Maher alle uolae then the o2jeesives «
torreeponcingly lows" vila fv nse ete, 8,

2a 28 a

‘To dutormine , and the ku of addition (@, the nose mrararemente:
cvererepont ith tae umber of hoy varihle. xn pote radio
Solem onliguritione were considered, The IDMLA TF bandas fleer
iS normally used at epeh reper, Wor ths wae

peers

bow,

For certain posibe nul ‘uterlewnoeonrations « namrower IP bade
pase (2000.4) my be roquted. Por eysteme using ths filler

Wa Fa

Since hem a #9 KOLA Ase fs he norma ete, the cernespndng
vues jor Jy atl il Be used tis anoles Thoretice tl the
following value insertea in equation (7

= 1236 Te
= Ra Re
= 70H
= HOR

cea)

10,
Jo ~ R885 ein aL band of 11 MOH, aad
Jp = OF Ala per S-AFEe dba ab LL He

Fur cuntgine upon tae dition lof the ep G8 Ble le
ie inant pelt aed pn oF Hes A the Sete
Pel ap tl tate ngs 38 Fh omic AD