O,oNN£, NJ;LSoN l £~ Co F.

CL p~s JJ.,oSJ-1

United States Army Security Agency Training Center and School

fort Dnens, Massachusetts

EQUIPMENT HANDOUT

NOT FOR COMERCIAL DIS'IRlBUTION Document provided by Nelson Dionne Scan by Jeff Adams eenginccr@erols.com

The purpose of this trorkbook is to provide a concise outline and reference book concerning this course. Tho information contained in this publication follows the instruction presented during the course and provides a convenient reference to the topics being discussed. As sufficient space has been provided through this workbook for notes, the student is encouraged to have it available in class. If properly maintained, this workbook will serve both as an excellent review for the final examination and as a good permanent reference.

This 'WOrkbook is not classified and may be used in the studentVs quarters. However, it should be handled in a restricted manner and used only in conjunction with USASA activities. It should not be disseminated for public use or disclosed to unauthorized persons.

i

SE£TIOtJ S fJ P

1. Sleeping in class: The~e will be absolutelY NO sleeping in class. If

anyone cannot stay awake while in class he will stand arid go to the ~ear

of the room and ~emain there untU he is no longer drouay. If anyone is

found sleeping, he will be awakened and proper steps will be taken to

insure that he remains aWake.

2. Questions: When asking or answering questions 1 the student will stand,

give_ his rank and name and state his question or answer. He will remain

standing until acknowledged by the instructor.

3. Seating: All students. with the exception of the class leader will be

seated by roster order bsginning with the second seat in the first row

on the instructors right. The class leader will be seated in the first

seat.

4. Noise in class: We cannot tolerate any unauthorized noise in class. If

anyone has any co~ents to make he should raise his hand and the instructor

will allow him to address the entire class.

5. Equipment handouts: Each student will print his name, rank, serial number,

class number and company on the front of his handout. Each student will

make certain that he has the handout with him whenever he is scheduled for

an equipment class. There is SFace provided in this book for taking notes.

Each student will make certain that these notes are current at all times.

ii

INDEX

SECTION SOP ii

INTRODUCTIOJI TO RADIO ~IPMENT 02

ANTENNAS 04

MULTIC OUPIERS CJ7

BLOOK DIAGRAM OF THE R-390/URR 09

RADIO RECEIVER R-390/URR 10

RADIO RECEIVER R-390A/URR 14

ASSOO !A TED REr:EIVERS AND EQUIPMEill' 15

AN/URR-29 18

AN/URR-29X 19

TYPES OF KE!'ING 20

cv..;305/U 21

RD-60/U 22

DIVERSITY FUNDAMEm'ALS 24

MAGNETIC TAPE REt: ClWER 26

PREVENTATIVE MAINTENA:OOE .30

l

IN'l'HODUCTION TO RADIO EQUIPNENT

1. OBJECTIVES: To give the student an introduction to intercept equipnent,

outline of course, section SOP and definitions of common terms.

2·. IMPCRTA~E: It is impossible for anyone associated with the field of radio

communications to accomplish his job efficiently without an understanding

of the equipnent used within radio communications. This lesson gives a

general description of the basic types of eq~pment used in the intercept

field, thereby preparing the student for the more intense training which

will follow.

3 • CGMON TERMS AND DEFINITIONS:

Resonant antenna: An antenna cut to a given wavelength so that it will . 1../b't (

respond best to the corresponding frequency. ----- . · ::. _.... v.-A e. A-N 1 FRe1~.lN Mb..S cJ... v '

Nonresonant antenna: An antenna cut to no certain .frequency so that it

will respond to signals in a broad frequency range.

Unidirectional antenna: An antenna that will receive or transmit signals I .

:;-~;;- ne"'t~\oiR IN Ltnt.<. best in one direction •. i)Sl; 1,; S '' ;::. ::. .

Terminating resistor: A load resistor connected to the end of an antenna ' ,roo ol4:""-in order to increase directivity. locidfekl pt cppc.~li-< etoli/J cP. Tt?IJ.NS, Lme-.

Transmission line (feed line): Any conductor used. to carry RF energy

from one place to another.

Zero beat: The null between two frequencies beating together resulting

in complete cancellation of frequency and signal.

Selectivity: The ability of a radio receiver to isolate a signal.

Sensitivity: The ability of a radio receiver to amplify weak signals.

2

4.

INTRODUCTION TO RADIO EQUIPMENT

ABBREVIATIONS:

AF

AGC

BFO

cw FSK

HFO

IF

IPS

1-CW

MGC

OOK

000

QRM

QRN

RF IJ. N TP{IIIV s

0 ,\\N I - Od~f2cl IDI\ >L - IJJ/ - --

81---- 11 UNI ···-

3

Audio Frequency

Autone. tic -Gain Control

Beat. Frequency Oscillator

Continuous Wave

Frequency Shift Keying

High Frequency Oscillator

Intermediate Frequency

Inches Per Second

Modulated Continuous Wave

Manual Gain Control

On-OFF Keying

Oscillator

1-!an 'fl\ade Interference

Natural Interference

Radio Frequency

ANTENNAS

1. Fixed Antennas:

a. The vertical tower is used to send and receive vertically polarized signals with high gain because of its height. It is difficult to erect, non-directional, and hard to camouflage.

b. The beverage antenna is a unidirectional antenna used to receive very low frequency ground waves. It is of extreme length·(sometimes several miles) and often resembles a telephone line o NoT Te~Qiii•AIAl'tlll o...ScMH.i Vt:r<TtCfJIIY PoL' Rll.tlb J. \L.Pve qMT, osuv'lllj LOIU Pa~~

c. The sloping vee. antenna derives its name from its appearance. It does not have as high a signal-to-noise ratio over as wide a frequency range as the rhombic antenna o This antenna is used in mobile and aemifixed unite and in some field stations.

Full I.VjQv~ - t)lt't-f'el IDit!ll.L - l.ty..&IO<N - Te~ f'A<N lfrei!J

i-/o(U; ~oNT 91 '/ poL, RtJ..ttJ

d. The rhombic antenna is ideal tor permanent installa tiona. It is efficient and highly directional over a very broad frequency range. The rhombic is a unidirectional antenna. Each of the rhombic antennas must be spaced at least 600 feet apart, vflllt~ usl~lr.

..G.pAce. 'OIUeac.flt S y ~TO.A-\

ql\ ~/

({

4

ANTENNAS

2. Portable Ante~:

a. The whiE or vertical antenna can be from a few feet to over 100 feet high. It retains popularity because it is easily erected and still provides acceptable reception of signals over a wide frequency range. Usually used for mobile and semifixed operation. )f' wo4vC!. vlf'Hicl)l p,1,,1..t).e,

b. The doublet and double doublet antennas provide satisfactory results for horizontally polarized waves with maximum response in respect to directional properties, broadside to the antenna. The double doublet receives satisfactorily over a broader frequency range than the doublet; however, a doublet cut to a specific frequency is more efficient than the double doublet.

D~l

c. The long wire antenna is usually erected in emergencies when no other antenna is availAble. The longer, in wavelengths, the more sharply bi-directional the antenna becomes.

L/ & ~ -. l :-r~ "r- ~1\ltl'tlf/1114 I Ill PI 0, IN I f-=R.ee?veNcy ttJ r.\C.? - c......ellle;

5

Cu tJ UR.R..

Cu lfiFfJR{(.

6

MULTICOUPLERS

CU-168/FRR

FRONT

BACK

GENERAL DESCRIPTION~ The Antenna Coupler CU-168/FRR is a piece of equipment that provides means for·operating up to five receivers from a single receiving antenna.

BASIC CHARACTERISTICS~ _.-1. Power Require~nt!: /j !~ -/;).$' .M ,_ ~ rU 0 2. Frequency Range: ___ _..o.t;;cl~..;:::3~~..u.._...c._::.;.;v;:.._-______________ _ 3. Nwnber of Outputs;

a. To Recei vera : __ ..~,/_..:;,.0~-----.-----------b. To TANDEM antenna coupler:_~'i~-----------·----

7

l>lULTICOUPLEnS

CU-.52/URR

GENERAL DESCRIPTION: The ant erma coupler CU-.52/URR is a broadband coupling device designed to permit operation, from a single antenna and with a minimum of interaction, of 1 to 10 radio receivers having unbalanced antenna input circuits or 1 to 5 radio receivers having balanced antenna input circuits.

~ASIC CHARACTERISTICS: /"

1. Power Requirements'.!:.:___./~L,~...1( _---.,...,.,d .... · _J_7J ______________ _ 2. Frequency· Range : __ _.~;[o4;';...-----J:.~oed~A\.;.uo::G..::S::....-------------....._-3 o Number of Outputs: -

a. Balanced: __ ~~------------------------------------------b. Unbalanced: __________ ~----------------------------------

8

BLOOK DIAGRAM OF THE R-390/URR

rJ/'l

SupeR- J-IJ~ocyNe -r/te~( j (3 eMtNb 1JoP!Jn< o (-' tfo.rit""ie C!2et(. , L.tUf f-{{'eqvfh!('y

CJJN.cJtN~ ., .. 'T1 LtVlvtruu vs v.-t/~ ~ !tlf~.<.-- IJNIJ Lou.,en_ FRe~uefi/C'r

\

9

0

0

0

UNf METER +10 0

~ .. ,~. ~

·RECEIVERS R-390/URR

. ..... , ... , " ...... aADtO aiCIIVU·I-

It...,_• ••• toorc ro u ao;

AOC .... ~ ... AUDIO fiESf'ClNSE BREAK W

BAHOWIOTH KC

IIHAftP(fl50. WIO£ Of® 8f0 I'ITCifi' fi.WCTION

{Jjf -;:============~ffi'l @ ~T. {f) r <i) lli) $1ANO BY CAL - TRIIII + 2 2 I Off - - &Wt:LCH I 0 I

.,. • "o @!i! O~l!ll!Jl o .. - ~ Of~ @ ICILOCYCLE ClfAHOI: ® MEGACYCLE CHANGE

(f) CAUT~

ftEAO INSTRUCTIONS PACKED DIAL LOCK ZIRO AO.I. WITH EQUIPMENT BEfORE USING

LOCAL GAIN llfOAIN

f'HDNES I ' I lo :i%f. I lJff. @ ·~ • I

0 0

QENERAL DESCRIPTION: The Radio Receiver R-390/URR (COLLINS) is a conunercial superheterodyne receiver. It has a built-in calibration oscillator which is accurate to within 3/10 of one kilocycle.

BASIC CHARACTERISTICS:

J.. Power Requirementsa..~-~J,..;./S:~/""~;:.).. ... 2~0~1/;,....___,L/.:....:?~-~6£~· ,;_C=..t..;:,f:; __ -LA_,_C::..:..-_ 7

2. Warm-up Period: __ Lf..~~-~An~t~Nur~''~!~e~s~.------------------------------------....

3 Frequenc R nge • ~..~- tJ., - .:"/1\o - "/),'·Oo II n • Y a ·~·~v=-~>~l~cf~ms~~·----~~u~~---~~~d~,~,v~~~~~-----------

4. Crystal Oscillator:~'D "'ea. §atCPO;t7oAif euwf Ma V\c

10

0

0

0

RECEIVERS

R-390/URR

Control Nomenclature.

1. t:miTER Control:..Jfi~eaOol.:u"-~c.,.e .... s_.1.11~ ..... R. .... N...._ _______________ _

AGC Switch: ,4vlq(IU([jc, C?4trt9aN7R(JL (.sloru~lbebi(}M- FJ4s7)

BREAK IN Switch: 1/.seo wffit li>t?llls.M•Ilt>R

FUNCTION Switch: -.£o loa TvQe o £ a Oa,a rfTtont r• I

(a) OFF: ]Ji UJ\I!J> oPE l{eCI ev eo

(b) STANDBY: WARmup [MoT oum I( MJ.A1 ) (NonMoiLy N{r..J_!?::...e.:.LJ __

(c) AGC: C ONJaoL.s. fqZ c oi\JTGpL

(d) MGC: Mtwvs/ CaPHAI CqNlOoL ( AlaR 019 II" lt/q T "~ etf) J r ' (e) CAL: l1c}•elrs Qays1el OB.(. _ _

(f) SQUElCH: $,Jews; oectevc~ heTLvtfll/ Bec<lll[,q,} of- ILOIC~ ({(Qt1/S./1A.I:!.'S./Oi-1lS

' s. ANTENNA TRIM Control: Iilb{f? aeuevl'!f 'T t' ljot'iflltfl( A r-()~ lkOX f2 t (I\( (2v T 1

6. MIDACYCLE CHANGE Control: /11!/,ks <eeJ~CT,oll ftt fl:uyyiJ

7. KIItlJYCLE CHANGE Control: S ele/i' s V\ a. f.3pot0 Eo~ ~Ot/cc(u Pee~ F'

8. RF GAIN Control:~:jU;jo~lu""'MJQ.l<~C""''a(..J.A.~o~.C""'t l?~dl_..,£~qr?~~R"""F-~;:,...._;;L.JI me~~'---------9. DIAL LOOK Control:_L_oc;;;.;;.;.U.s....._.I..:.~N .... Il.._.tc .. p..,To""'a~rJ-.t'""&l_,.s..._ __________ _

10.

11.

12.

zmo ADJUST Control: Olset./G(J(zes L&OtrfiDB OtW Cvseo ocU;I Our?JNb t(JitP(2,iiJfaw)

LOOAL GAIN Control: Vo}ur16e Q,N[tRol Goa 4 {. ,c;,T@e ,I

BFO OFF/ON Switch: 0 pe - Vocce ___.O~N.:.-----.c-..ot?:.e::o..·-----------

l3. BFO PITCH Control: Vt+RICS piTc.-H o£ -9 1C? ~\tel 14. BANDWIDTH KC Switch: .[l$ (1/} To k 1 ' M 1 nltfi -l CQ f<N1

15. AUDIO RESPONSE Switch: Se/ecl s Oew(,Ue o ~ t ,l Tell tltr

16. UNE GAIN Control: C:.Of/TRols \laloet To fldeSStJi?f C~u;fl'.

' LINE MT?l'ER Switch: ( ol\tlRols seNStu/tt of Ltw-e Le11el M.Ptel? · NOT l}sPtT ~ VQf\.IS • 1'\1 ltM-l M'd e~ ¥ &y 0'" 1-/

17.

11

RECEIVERS

Control Nomenclature. (Cont)

18. PHONE JACK:__,_F~o"""R.....,I...Jft ..... eAu:.l2.;..:;£e::..~..J------· ---------­* 19. CARRIER lEVEL Meter~ Vts.!lJ1l O!e~u&eMeV !AI r)ec!bl~r of It? f St<znual

20. LINE lEVEL Meter: " IAJO«tfDatJ tu(}l!; '!;; o{ IMIUMe J; exce.s.soay ~ ~upF

1. LIMITER 2. AGC 3. BREAK IN 4. FUNCTION 5. ANT .TRIM 6. MEDACYCIE CHANGE 7. KILOOYCIE CHANGE 8. RF GAIN 9. DIAL LOOK

JOB SEI'-UP SHEET R-390/URR

STARTING POSITIONS

OFF 1¢. MED 11. OFF 12~ AGC 13.

0 .1.4. none 15. none 16. 10 17.

counterclockwise lB.

REJEI\Tm CALIBRATION

ZEROADJ LOOAL GAIN BFO BFO PITCH AUDIO RESPONSE LINE GAIN LINE METER BANDWIDTH KC

·PHONES

1 ~ Rotate MEGACYClE CHANGE control to proper band.

caunterclockwise

5 ON 0 MED 0 OFF a plugged in

2. Turn KILCCYCLE CHANGE control to check point nearest desired .frequency • .3. Place FUNCTION switch in CAL position. . 4. ~·lace BANDWIDTH I<C switch in .1 position~ J 5 • ;I'urn ZERO ADJ to maximum clockWise position. 6. Zero-beat tone with KILOOYCLE CHANGE control. 7. Place FUNCTION switch. in AGC. 8. Release ZERO ADJ control, turn counterclockwise. 9. Place BANDWIDTH I<C in 8 position.

12

RECEIVER TUNING

1. Tune to approximate frequency of signal. 2. Search for signal with KILCXYCIE CHANGE control, 3. Zero-beat signal with KILCXYCLE CHANGE control. 4. Adjust pitch of signal with BFO PITCH control. 5. Adjust ANT TRIM control for· maximum deflection on CARRIER lEVEL meter. 6. Adjust RF and LCXAL GAIN con+.rols for proper volume. 7. Place AGC in SLOW position for hand sent Morse code.

INTERFERENCE - QRM

1. Rotate BANDWIDTH KC switch to a narrower position. 2. Place AUDIO RESPONSE in SHARP position. 3. RE'Bdjust BFO PITCH control for maximum volume. 4. Eradjust RF and LCCAL GAIN controls.

INTERFERENCE - QRN

1. Decrease RF GAIN control. 2. Rotate LIMITER control clockwise until interference is reduced. 3. Experirnent with BAND\fiDTH KC switch (widen or narrow bandwidth).

SHUT DCWN

1. Temporary: a. Put volume controls to minimum ( 0) position. b. Place all other controls and switches in starting positions.

2. Permanent: Place FUNCTION switch to OFF position.

13

CAUTION REP.O INSTRUCTIONS PACKED

W!TH EOUIPMENT BEfOf:E USifjQ

PHONES

DIAL LOCK

LOCAL GAIN

I f . -· •

10

l1l~CEIVIiHS

Il-.3 90A/UHR

ZERO ADJ

Rf GAIH

~ • • I t

10

~EOACVCU CHANGE

'·-·---------------·----------------' :_:n:ru.L DESCRIP!'IONt The Radio Receiver R-390A/UR~ is the same as the R-390/URR

with the following exceptions. The ANTENNA TRIM has been moved to top center of the receiver. The l-iED position has been omitted from the AUDIO RESPONSE, and the SQUElCH has been omitted from the FUNCTION switch. This receiver differs from the R:-~90/URR mainly in the IF filter section. The R-390/URR ha.A an electrically·opernted crystal filter whereas· the R-390A/URR has a mechanical filter and no pro.vision to eliminate it from the IF circuits. Therefore this receiver cannot be used where the phase of a signal is ·a determining factor in the results obtained. Exa1nple: D/F.

BASIC CHARACTERISTICS:

1. Power Req_uirements:

2. Warm-up Period:

3. Freauency Range:

14

AS~30.~ I/\.'1'1!:0 I tECEIVJiJtS · & · l!:QUIPlll!lff H-3i3')/UHH

LINE OAIK fRED RANGE LIMITER CARRIER UVEL 0

·4/f. o,------"""=-~·®~[tnJ~,...---... 00

00

,,. 8ANOWI~(H

KC

~· AUDIO IIEBPON&It

lllOIUM

CAUTION

-~-IIEAD INITRUCTIONI PACII&O

WIT" t:QUIPMlNl I&POIII UIINCI

I' HONEa

@ 0

~~@]@] ICILO~YCL.II

0

fREQ CHANGe:

0

liP' BANDWIDTH

ICC

®

DIAL LOCIC

@

BR!AICIN

OP'~

GENERAL DESCRIPTION: The Hadio Receiver H.-389/l:JHR is a double conversion superheterodyne receiver. The types of signals received are A-1 ( CW), A-2 (MCW), A-.3 {voice),. and F-1 (FSK). The frequency range is f'rom 15 .to· 1,500 kc (2 ·ranges). This l't:lceiver does not have a calibration system built into the set. The reading has to be taken from the counter-type dial. The calibration er-ror wiil not be more than 300 cp:is in the 15 to 500 ~range, and not more than 600 cps in the 500 ~ to .:J., 500 kc range. The receiver is tuned manually or by motor tuning, with automatic band switching.

BASIC CHARACTrmiSTICS:

1. Power Reguirements:

2. Warm-up Period: / s /I'll AI

.3 • Frequency Range: / S ~- S () 4 1/( <'

..,0~()1) - /{ 01 v( c..

15

00

00

LIN£ IIEY£11

LINE U:VEL Of'f®IO

LINE GAIN

~~~. IJ.J.i}e 0 10

......, ............ . lj&JtO Ill ((IVU ll•l'IIU ... ......... .. ..

kniC TO U UC ·

AUDIO IIESPOHSE IIIIEAII 1H

0

BANOK~~TH ~ -.~~~~$IO£ rr , .... 1 'r 1 .... J ® fWQION

0 w ~ (t)[ ®, IITAHDB@CAL •T=+ (£) Q & 2 ' 1· riff swt:LCH 1 0 1

,_,n ~ • o (WW Ol!llillilj o • ~ 2?&

SELECTOII7

Of~f ON ([f) ILOCICU: CKAHGE MEG.ICYCU: CHAN0t:

0 (£)I II II

AUTO TUNE ZEIIO AD.I. (i)

I'HOHEII

@

BASIC CHARACTERISTICS&

1. Potver RequirementlU I I/~ & ct_ tJ

2. Warm-up Period: I S ~ tl\1

,..... 3 • Frequency Range: ,· 0 ~ 3d t4tC..S

4. The purpose of the R-391/URH. is to copy stations transmitting automatic Morse and radio teleprinter signals which have pre­set operating frequencies.

5. Crystal Oscillator:

16

0

TUIIU•IO •

§

ASSOCIATED;RICEIVERS & EQUIPMENT n-220/Ulm

@) @~@ e>@ E 0

@) @)

@) @) @) OIC:. T"lll

@) @) @)

IIIHAL OOVI U I Ullf RADIO R[CI:IVI:II R•IZOIURR r.,.,,.,.. I .. ., ...

uc ltl.fll flit

C~UTION l(fORE OPI.flATtON REVIEW INITftUCTION BOOK PACKI!D 0 ....__..;::.W:..:.;ITK::...;(:;;:Q;:;;;UII'.;;;;MI:;;.,"T.:...-__.

ft. f. GAIN IQU(LCH

SI!U:CTIVITY AUDIO II!SPOHI! NOtlf Llllllll I. It OICILLATOR OHRATtON

GENERAL DESCRIPTION: The Radio Receiver R-220/tmH. is a superheterodyne re­ceiver. It is desigl\ed for the reception and monitoring of AH, FH, and CW signals. It may be rack mounted using power -supply PP-660/URR or operated mobile with a 26 volt dynamotor. It has a built-in calibration system used only by the maintenance man. The frequency range of 20 to 230 me is covered in seven bands.

BASIC CHARACTffiiSTICS:

1. Power Requirements:

2. Warm-up Period:

3 • Frequency Range: J 0 - '8 ~ 'l> fVl <D 5::. •

4. Found generally in low level teams of the USASA.

5. l1any military nets, such as air-to-ground and tank-to-tank nets are presently within the frequency range of this receiver.

17

ASSOOIATED RECEIVERS & EX.lUIPJ.1ENT op~Rr-.7'-t.s t21(o.M AN/URR-29

p p b& rt:Y ((_ (( - I Is~- ,;;13 J /J.oCofiM}/11 I ()y go T" u..on c-<. pou-evc G..u(Jply (tA/fllD-.M.ljo.t!J_

l,t,t1l.t QrJ~o beuM~s R,.[pt(L/u~v<. ~~ f1o.6lr:> V...oJ?t{

18

ASSOOIATED ~ElVERS & EQUIPMENT AN/URR-29X

v S,(J t/J I 1\/

TYPES OF KEYING AND EQUIPMENT UTILIZED

r

/O(} t/f. /0 bb(, -!> ~,jj

20

r

'l'YPEJ OF Iili"'YING AND EQUIPHFJ.J'l' U'I'IUZED CV-.305/U

OUTPUT CURRENT

TUNING

REVERSE ~ NORMAL @ IS) IS) IS)

CHANNEL 2 SHIFT RANGE

~\\" 2 :s 4 POWER

,, ,~, -· ON

~

IS)

TUNING INDICATOR

0 (f)

'/ / ' f,{//

!'~ (f) 0

CRT MONITOR

CHANNEL I ~ CHANNEL 2

NOISE ~ ~

REJECTOR MAKE FREO.

~ ..... 1;1'""'

SIGNAL BALANCE

~

GENJffiAL DESCRIPTION& The Frequency Shift Converter CV-305/U is used to permit frequency shift signals to be copied either b7 a-teletypewriter or by the Code Recorder ·:RD-60/U, whichever would be applicable. Frequency shift transmission is used to overcome interference.. The input signals to the CV-305/U are obtained from one or two radio receivers •.

BASIC CHARACTERISTICSt

:1.. Pow·er Requirements : ..... /...\ooi(J...,(&.---J-l U..J...li£...._~--"'V~~$~{)_-..I.O(t,~O~e-rfl~-~:.------1

2. \'larm-up Period :_........,(I..J.IM~!...,.Il£'-. ..._-------------------

3 • ReceptiOn: Q 0 r -Q £. V\ ~ Indicators: ____ ~NLe~·~re~>~·sua~G~I--·~o¥0-~e~&~p~~~~~~n~t~6~~C~4~,A~,~~, o~o~/J~-----------------

1

f,' ~(UQ • .(littf--1 Rf).f\l6-t -lOtJ-(pooiJ cyeles

I ()._

d- (~

I~() - LlD tJ c.ps ~ o o l'd- o 1) ~r f"

~c rJ-.oo~ ;..·[or) I?.(JS

1Q #.(oo- L{ oo o QfS

r 4ooo - bboO c.p'5 .21

A C

ASSOCIATED RECElVERS & EQUIPMENT UTILIZED RD-60/U

SPEED CONTROL

FEET PE.R NINUTE

. . . ou @.cr~ IN © . . .

PULLER AMPLIF:ER FIL TEA SIGNA~ LEVt:L PE~ REVERH NO~ITOR PE~ POW.ER

GENERAL DESCRIPTION: The Code Recorder RD-60/U is an ink tape recorder used to record high speed CW signals.

BASIC Cr~RACTERISTICS:

1. Recording Speed=---------------·-------------

2.

3.

4.

s. o.

7.

Tape Length: /diJO FT Tape Width: , ?If 1/!Cb Character Size: V'D f2Wb l f Power Requirements: LL.( -d.J.D IL j'"f) -6~ ~fc(p_~- .//._r;_ _ warm-up Period: ~ secoaa ~ Pens:

( ;J) F we Line: _--~..1-.::-/ f;-:~;..;~:..:.,_-:-.s;.=-Fp...;:;e_,_e_.iO,.___~----------------­( b) Ned 1 um Line : -..;oN;..:D~O:.-~.M:.::.;oiJ'-1 =-'£..~8f~e .... '?~--:Lq__,_,,O.~...d~()~.!=c,:t:-tJ.t.::'"-!o.--------(c) liro~d Line: __ ~f~o~fi~~R~e~-wiR~J~N~~~~M~·~;£~·~od~----~----------------

22

NarES

(} t.._l'()ll(~ol> I4-p~ ~eco VU)e{(_

S-l00° l#pM

/lc /tN-! f=Reta - f orJ.Jete Sl.(..t( c._~ ..:S peetiJ f21lfl.l6e ~()...{/ c~ - IJSQI/J w .syuo O()Nfted J'fAr,b

0 p efM r { - s..lf-4-tl o 6 i

f- dter<- ~ o u e VCCIJ.Ae (\ R )/L

.s t~u~l. L~v~l e~f\tll?tl " Ae'TrviAI-es pf~N

23

ASSOCD\'l'ED llliCEIVT!:HS & mUIPHENT UTILIZED DIVERSITY FUNDAMEN'l'ALS

Gf~ERAL DESCRIPTION~ "Diversity" is a term applied to radio receiving systems designed to overcome "fading" in radio conununications. The term "fading" commonly refers to variations in received signal strength whereby the sound produced decreases, i.e. 1 "fades out" periodica.lly to such a.low level or becomes so distorted that is is hardly usable. The volume may remain at this low level for a time, o:r it may immediately become loud again, repeating the variation every few seconds. This periodic fading in signal strength is generally a localized condition. It may be found that while the signal has faded out in one location, it might at the same time be strong in a nearby location. Thus, fading may not occur simultaneously at two locations even though they are fairly close together. This characteristics of fading has given rise to what is lmown as "space diversity reception" whereby two or three antennas widely spaced are used to feed individual receivers, so that at least one of them will always be producing a usable output regardless of the individual strengths. To gain the full advantages of diversity reception, the individual receiver outputs must be connected to circuits which automatically select the output of that receiver producing the best signal at the particular instant, the outputs of the other two receivers being automatically eliminated.

TYPES OF DIVERSITY REDEPTION: r.

1. Frequency Diversity: f) /?rfVW.. I rt I) t P u.' c ,tt._ .. __ ..... f!;--:D..~..ft:......~:/11~' ~~"-.... t_.O"""'P,.('l>"'v.,..e...,n~,~.~.rc+:t .... >-__ _

2. Space Diversity: ___________ _

DI'IlERSITY RECEPTION SYST:El-15~ s.[){)( .p

1~ ~1 Diversity:

a. Antennas: J:. 6J /J ~>~e /ef?MtM/lt eo {2)1~ fV..btc~ b. Receivers: d Q ,;qf) (! .ea._uve(R~'I

c • Frequency Shift Converter: C \} j {) S ~ o Q 'j) to 0 /l. PR u.fl P V(

ASSOCIATED RECElVERS & ~UIPMENT UTn.IZED DIVERSITY FUNDAMENTAlS

25

,, . ,,.,,. ........... ' .... .. -~~·~· _:·- _·:·-:~~~.;

·-··,-•'"' I

J.!AGNETIC TA PE REGOI:DER AN/TNH-5

'l-l:ml

26

MAGNETIC TAPE REX:: ORDER AN/TNH-5

GENERAL DESCRIPI'ION t The AN/TNH-5 is a versa tile magnetic tape recorder capable of recording and reproducing at three standard tape speeds using two standard size reels. It can be operated from its ~ase, or installed in either a rack or console.

BASIC CHARACTERISTICS t

l. Power Requirelllents . ..:.:_:.../"""j'""{---'-/c~6?;..;:S'-.---~S~-O::;....a-+(2;..;:5';...._ _________ _ I

2. Warm-up Period :--.;J;;;;:;·;....;o;....;;:s-.·~------------------­.._,., ). 71 . , -..,;./ '( if IJ t/h

3. Tape Travel aild Recording T:ime: __________ ~--------

4. Tape and Reels: 2 11

= IdOl 1 1nJ?~ /0 ~ "cJflt 1 T ye r .., 5. Recording arxi Reproducing:--!.,;/VJ;wi~K.,:,.e-Jt.JcDo;,.., -+Ou&u.f.J..., IC..h ....lc~o:JI,.IV?;.t:;v'~---------

1

1. ON--OFF Switch: ______________________ _

2. STOP Switch: .;;..T,;~sTApe

3. PLAY Switch:

4. REWIND Switch:

5. WIND Sw~h: (p -·-...._

6. Tape Speed: &e.feJ:;

7· S&fety Switch:

a. Tape Gate:

9. PLAYBACK LEVEL Control: \/ 0 j N.N\;<2,

10. EQUALIZATION Switch: CAfGis;::-ptMr>f {b l11--p~ &fJifVJ Co u/rol Vo ··-u­I

11. OUTPUT Jack: ________________________________________ ___

12. INPUT Jack : _ _.;..<?_~_N...;..I\.;.;.1 .;...err-:-..:..1 _;....1'11:...1_ ~'(_o_i1-...+-fJ:...:.fl._.l._'...:k..;.__c..;..o .:...::>''-=rfJ ___ ---------

13. INPUT SELECTOR Switch: 1lA Ate U IN 0 t1 1> (J 1\lc r l a 1 AI A ()I I

14. RECORD LEVEL Control: h oLI,tlAI' roAflau/ lri( Rerof?fltAto I

15. EARPHONES Jack~--------------------------

16. MEI'ER SELEC'IOR Switch:_1.:../p..~s.:....· -----------------

27

17.

18.

19.

PCMER ON Light:

MONITOR Jack:

W METER:

MAGNETIC TAPE RECORDER AN/TNH-5 (cont)

20. RECORD Button: -S.\.e-r[/ l( e r o {? V-) c" tr1

21 .. RECORD INDICATOR:

22. OUTPUT' ''B" J.ack:--------------------

2.3 • Line Termination: @ #.l IJ .. J,u 0 s JN Ce aT~ ~v2 7h tnt G oo J .u 1 6 fj2 ::j 9f¥.1:J p). "f4 (J V4NTYJVt>~

.3 ..s. (J k 1---: I()

/O"cJ... 7"a.,er~

-f,.s~o

I $ "'<(

Reel 7'1 Slull _j ;; ~ o /IJtJ 7J Jo I hO /5/ /{ -~o

7 1 r:Ji- I s

/0'' R.ee/

I l t -r:JvO

6d- 1.10 .jV -(j I

28

RECEIVERS AND RECORDER-REPRODUCER JOB SHEET R-390/URR & AN/TNH-5

STARTING POSITIONS

1. ON-OFF 2. Tape Gate 3. Tape Speed 4. PLAYBACK LEVEL 5. EQUALIZATION 6. OUTPUT Jack 7. INPUT SELECTOR

ON closed 7~ 0 7l none 600 unbal

8 .. 9.

10., 11. 12., J3o

INPUT Jack RECORD LEVEL MEI'ER SEmTOR LDIE TERMINATION MONITOR Jack EARPHONES Jack

RECEIVER TUNING

1. Calibrate receiver. 2. Locate signal. 3. Zero-beat signal. 4. (a) For C.W reception (recording) adjust BFO PITCH o

(b) For ~oice reception (recording) place BFO switch to OFFo 5. Adjust the following for best reception.

(a) ANT TRD! for maximum volume.

d AGC (FAST) for voice signals.

cormect cable 0 REI: OIW LEVEL ON none none

!bl RF GAIN and LOCAL GAIN for comfortable volumeo c BANDWIDTH for clearest signalo

e) AUDIO RESPONSE (SHARP) for extremely bad interference on cw signals.

PRELIMINARY RECORDING PROCEDURE

1. Unplug headsets .from receiver. 2. Plug headsets in to EP~PHONES jack on recorder. 3. Plug other end of INPUT jack cormecting cable into PHONES jack of

receiver or the audio output jack from rear of receiver. 4. Adjust RECORD LEVEL of recorder until meter indicates 100 or 0 vu.

REI: am ING

1. Depress PlAY and RE!:ORD switches .. 2. Adjust REI:ORD LEVEL to 100 on sound peaks. 3. Monitor sigm.l with headsets plugged in the EARPHONES jack on recorder. 4. To check operation of recorder» place MEI'ER SELECTOR switch in the

following positions.

!a) BIAS - meter should read between -1 and +1 vu. b) ERASE - meter should read between -2 and +2 vu. c) PLAYBACK LEVEL - Adjust PLAYBACK LEVEL volume control for comfortable

listening level. (d) RECORD LEVEL - normal position for recording and monitoring.

5. To stop recording depress STOP switch.

29

PREVENriVE MAI~wrENANCE AND ITS APPLICATION

GEN:mA.Lf Preventive maintenance is the everyday care ot equipment to -insure ita continuous satisfactory operation.

PR_lh'C !PLES OF THE MAINTENANCE SYSTEM.

1. Maintenance shoUld be accomplished at the lowest echelon consistent with the nature of the repairs.

2. The determining f'acto:ra of repairs are: authorized spare p.rts, tools, time and equipment.

:3 .. F&ch echelon will perform the maintenance. of the lower echelon not having the necessary spare parts, tools, time or equipment.

4. Repairs will be accomplished e.s soon as RQssible and the equipnent returned to the user.

IDHELONSt

1. First Echelon:..~O""-J,;,f?..;::e...,fi.:..ft:.c..'""' ... l C?'"'"~'t-----------------2. Second Echelon: /huT NlA,M TeMttlVCe.

3. Third Echelon:_ea,s.T /Jj auJ-eA' A«ce.

4. Fourth Echelon: F!~F!Q Pte/a ~lao a ( llamv t4t?ii&) , ,. 5. Fifth Echelon: _,jQ"""-=g...,p,~.~.o.~-~.1 _________________ _

CA TJ!DCRIES f

1. Orgainmational:_,_;.-t.J,~--------------------

2. ·Field:~~~----------------------------~----------------

3. Depot:~-------------------------------------------------

BASIC MAINTENANCE OPERATIONS I

1. F E 10 L. ~~-------------

2. I 1\l.S.P!f~T

3. T IG~Tel\f

4. C LfPN

s. A D..>usT

6. L U b~tr&Aie