UNCLASSIFIED

AD 402 26 0(

DEFENSE DOCUMENTATION CENTERFO B

SCIENTIFIC AND TECHNICAL INFORMATION

CAMERON STATION, ALEXANDRIA, VIRGINIA

UNCLASSIFI[ED

NOTICE: When government or other drawings, speci-fications or other data are used for any purposeother than in connection with a definitely relatedgovernment procurement operation, the U. S.Government thereby incurs no responsibility, nor anyobligation whatsoever; and the fact that the Govern-ment may have formulated, furnished, or in any waysupplied the said drawings, specifications, or otherdata is not to be regarded by implication or other-wise as in any manner licensing the holder or anyother person or corporation, or conveyung any rigbtsor permission to manufacture, use or sell anypatented invention that my in any way be relatedthereto.

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-• March 25, 1963

(QUARTERLY REPORIT,J 1AZ-.V~ '2- -

Prepared On

4)CONTRACT NO. NOber 81262 4//

I Prepared Fo:r

BUREAU OF SHIPSDepartment of the NavyWashington'25, D. Co

III �91-.oi

Prepared By

APPLIED RESEARCH INC.

76 South Bayles Avenue

Port Washington, N. Y.I

LI_

1.0 ABSTRACT

1.10 This report covers work done on the development of an RP Spectrum

Analyzer in the range from 100 MC to 1000 MC for the three month

period from November 1, 1962 to January 31, 1963. It deals with

the following subjectas

1.11 Purpose for the development.

1.12 Names of technical personnel engaged in the development

I program, together with a summary of the man hours work

performed by each.

1.13 A description of the work done during the period from

I November 1, 1962 to January 31, 1963.

1.14 A project performance and schedule chart is included.

1.15 Program for the next three month interval.

IIIII

1 _ _ _ _-

2.0 PURPOSE FOR THE DEVELOPMENT

2.10 The RP Spectrum Analyzer shall be developed for the visual display

of amplitude and frequency of RP signals in the frequency range of

100 MC to 1000 MC.

2.20 The frequency range of 100 MC to 1000 MC shall be displayed in four

swept bands on a 5" oscilloscope screen.

2.30 The spectroscope shall have sweep coverage up to 300 MC electron-

I ioally with high resolution, with no spurious responses and no

internally generated interference.

2.40 It shall be useful as a search receiver, spectrum analyzer, noise

j interference analyzer or as monitoring equipment.

1

I

iI

! -2..ii__ ___ ___ _ _ _ _

I3.0 TECEHNICAL PERSONNEL ENGAGED IN T32 PROGRAM AnD XA HOURS

3.10 The following is a lit of technical personnel engaged in the

I development of the RF Spectrum Analyser together vith the total

1mnumber of hours spent by each during the period from November 1, 1962

to January 31, 1963.

Name Total Hours Per Na

Brafman, R. 119o75

IBrown, H. 76.00

i DeProspo, M. 16.00

Garbauskse, A. 30,25

i Heller, . 144o75

Pollachek, L. 13*75

SStrasser, L. 44.00

VMiemas, T. 126.75

Tuloan, A. 58.25

Dennis, W. 48.50

Walker, A. 72.25

Meyer, J. 56.00

Iorrison, Z. 108.00

Thaplatre, R. 40.00

I Vergara, J. 67.00

Brovetto, Wo 71.25

Nerborg, N. 100.00

Kertess, Z. 16o00

Villilamst A. 26.75

Kenomd, A. 165.00

KeMAedy, P.

yOuaz. 1,1.42.00

, . _W l II I • , ........-

- Lb4O DUSCRIPTION OF WORK

4.10 During the period of this report the power IF anplifier/linear

1 detector, Unit 1ASAS, was fabricated, aligned and tested. A

j schematic diagram of this unit is shown in Dwg. No. D600802,

Figure 1. For con-enience, a block diagram of the RF Spectrum

I Analyser is given in Dwg. No. R700449, Figure 2. Unit lATA8 was

found to have the following characteristics:

Center Frequencyt 775 MC

Peak to Valley Ratio: 0.1 DB at 775 MC ±2-75 MC

Bandwidth 3 DBt 1108 MC

Gain: 26.5 DB

Input VSWR: <1.5%1 (at 50 ohms)

I 4,11 The lin-log preamplifier, Unit lATAl7, Dwg° No. c600853,

SFigure 3, fabricated in late August of 1962 was aligned and

checked during this period. It consists of two stages of

I amplification with a shaping diode across the output of each

stage. In the linear mode of operation, the diodes are back-

I biased and present a )igh impedance at the output of each

Sstage. In the log mode of operation, the diodes are forward

biased. In system operation, the biasing voltage is a DC

feedback voltage derived from a feedback amplifier stage in

the ln-log IF amplifier, Unit lATAT, and introduced via J3.

SSee Figure 1. Gain, bandwidth, and peak to Talley of the

paseband of Unit lA7Al7 were measured for different levels of

SDC voltage introduced at J3o The results are presented in

Table I below.

_ _ _ _ _ _ __ _ _ _ _ _

II TABLE I

Characteristics of Lin-LoR IF Preamulifier. Unit 1A7A17

SDO Bias Bandwidth Peak to Valley RatioVoltage 3 D ,, B Fom Ua

-20 volts 13 MC 0 77175 MC 778.25 MC +22 DB

-10 volts 19.5 MC 0.5 769.25 MC 780.25 MC +19 DB

0 volts 23 MC 1.O 769 MC 781 MC +15 DB

1+0.2 volts 22 MC 1.0 767 MC 783 MC +9 DB

+0.23 volts 23.1 NC 1.0 168 MC 783 MC +6 DB

1+0.38 volts 23 MC 3 768 MC 783 MC -3 DB

14.12 Two +200 volt power supplies used in the RP heads were returned

to the vendor for repair in August of 1962. The reason is

that one supply became excessively noisy after one hour of

I operation. The other supply kept blowing fuses. One of the

two supplies sent back was lost on Its way to the vendor.

I Its whereabouts could not be established. Therefore, an ARI

regulated +200 volt DC power supply was tested during this

period. This supply was considered as a possible replace-

I ment for the one lost. The unit when first tested exhibited

a 40 millivolt to 50 millivolt bounce at its output. It was

I found that an oscillation of 800 KC was present at its out-

put. A o01 pfd capacitor was connected from collector to ground

I of the regulating transistor in this power supply which re-

j moved the oscillation. The unit was then tested at no load to

full load at a line frequency of 60 CPS and at 400 CPS. The

measured results are presented in Table II below.

I -5-

TABLE II

Measured Reaulation and Ripple of +200 VDC S§=1lY

Line RIVVnle (Mv) Regalation (XV)reouenZ Volts ik , NIL to FL

60 cpe 105 008 1o3 30

60 cpa 115 1.0 1.0 20

60 cpa 125 1.4 1.4 20

400 apa 105 1.0 1.0 30

400 cps 115 1.0 1.0 30

4O ape 125 1.0 1.0 30

4.13 The 4200 volt DC supply of Paragraph 4.12 was temperature

tested. The DC voltage was set to +200 volts under 100 MA

load at room temperature (+21oC) after sufficient warm-up.

The temperature was raised to 62 0 C and allowed to stabilize.

The output voltage decreased to +199 volts. The ARI supply

exhibits similar stability characteristics to the purchased

supplies. The ARI supply has greater reliability and avail-

ability.

4.14 During this period the +33 volt, +30 volt DC supply, Unit

1A8P84, was received from the vendor and was tested at room

temperature. It proved to be within spec. The 30 volt out-

put was accidentally shorted. The 0.5 amp fuse in that section

blew and was replaced. In subsequent testing of the unit, it

was found that ripple from the 33 volt output increased rapidly

as the line voltage was reduced below 118 volts at 60 CPS and

with both the +33 volt and +30 volt DC outputs under full load.

The unit had evidently been damaged by the shorting. The unit

Swas returned to the vendor for oorreotion.

-_6_-

4.15 During this period the vendor sent back to Applied Research

the +30 volt/+33 volt DC supply, Unit lA8PS2, after having

1 corrected the unit to meet specifications. The vendor also

i temperature tested the unit. The unit was then tested at

Applied Research at 60 CPBS under no load, full load, and low

I line, high line conditions. The 30 volt output was within

specification with respect to ripple and regulation. TheI

+33 volt output did not meet every specification but was con-

sidered adequate for trial in the system.

4.16 The -20 volt, -23 volt supply, Unit 1A8PS3, was received from

the vendor. It was checked at room temperature from no load

to full load and at low line and high line. The unit was

I found to be within spec. The unit was returned to the vendor,

since he had failed to test it under varying temperature con-

ditions. During this period, the vendor returned the -20 volt/

-23 volt DC power supply, Unit 1AP$3, after having temperature

tested this unit. The unit was tested at Applied Research

I under no load to full load conditions and under low and high

line at 60 CPS and found to be within spec.

4,17 The 6.3 volt DC power supply, Unit 1kP84, was returned by the

vendor during this period after the vendor had given the unit

a temperature test. The unit was tested under the sane condi-

I tions as in Paragraph 4.16 and was found to be within spec.

4.18 The +28 volt DC supply, Unit 1ASPS5, was returned from the

vendor after having been temperature cycled during this period.

It was tested under the same conditions as in Paragraph 4.16

and found to be within spse.

-7-

I

S4.20 During this period two low pass filters, Units 1ATA15 and 1A7AI6,

reworked in manufacturing were returned to the lab. The components

I of each filter were better shielded from each other to prevent feed-

I through. The filters were tested. The measured characteristios of

low pasa filter, Unit 1A7A16, are as follows:

i a) 0.2 DB attenuation at 400 MC

b) 3 DB attenuation at 430 MC

I c) 4 DB attenuation at 610 MC

i d) 60 DB attenuation at 635 MC

e) 90 DB attenuation at 775 MC

i f) VSWR Input <•1.5 up to 402.5 MC

g) VSWR Output: <_1o5 up to 402.5 MC

I The measured oharacteristics of low pass filter, Unit 1A7A15, are

as follows,

a) 0,1 DB attenuation at 400 MC

I b) 3.0 DB attenuation at 435 MC

o) 40.0 DB attenuation at 588 MC

I d) 60 DB attenuation at 705 MC

e) 90 DB attenuation at 775 MC

f) Input VSWR, :_1o5:1 up to 402.5 MC

g ) Output VSWR* <1.5&1 up to 402.5 MC

4.21 The 25 KC crystal filter centered at 30 MC, Unit lATAll, was

I tested during this period. The unit was found to be substan-

tially within spec. It has the following measured oharacteries

tics:

Center Frequencyt 30 MC

Bandwidth 3 DBI 24.4 xC

I -8-

F

Bandvidth 6 DD 27.2 KC

Bandwidth 60 DBs 49 KC

Shape Factor (&J2ODBt 1.821lBW3DB

I Insertion Lose at 30 MCs 3.25 DB

Spurious Responses& >60 DB

)4o22 The 30 MC 5 KC wide crystal filter, Unit 1A7A12. received

Ifrom the vendor in July was returned to him for correction

of excessive spurious responses outside the pass band. Dur-

I ing the period of the report, the filter was returned to

Applied Research. It was tested and found to be within spec..

I Its measured characteristics are as followst

SCenter Frequency: 30 MC

Bandwidth 3 DBt 4.8 KC

I Bandwidth 6 DB* 5.2 KC

Bandwidth 30 DB: 9.2 KC

I Bandwidth 60 DB: 13.4 KC

I Spurious Responsess None Discer'nible

Shape Factor (BW60DB)i 2.57i1BW6D3

4.23 A preliminary subsystem bench test was made on the section

I involved in the 775 MC to 30 MC to 775 MC conversion during

this period. This included the biooupler, Unit 1L7A9; the

I 775 MC to 30 MC converter, Unit 1A7A1O; the 30 MC crystal

filter, Unit lA7All; the 30 to 775 IC converter, Unit 1ATAlA;

I the 402.5 MC looal oscillator, Unit 1A7A15, and the two low

pass filters, Units 1A7A15 and 1A7A16. Se the block dia-

gran, Figure 1. A swept signal centered at 775 MC was applied

tii - 9

I

I at J3 of Unit 1A7A9 and the output of Unit lA7A4. ysa observed.

A loss of -18 DB was found from input to output instead of

the design objective of -15 DB. The 775 KC to 30 NC oonver-

ter, Unit IA7A10, exhibited a conversion loss of -4 DE

instead of the expected 0 DB while the 30 MC to 775 MC oon-

i verter, Unit 1A7A14, exhibited a conversion gain of +1 DB

instead of the expected 0 DB. An attempt will be made to

i�modify the 30 MC conversion units to achieve a lower over-

all loss while still retaining the basic design concepts and

nodule sizes.

i 4.30 A project performance and schedule chart is given in Dwg. No. BSF-138,

Sheets 1 and 2, Figures 4 and 5.

IIII

II

I

S10-

5,0 PROGRAM FOR THE NEXT THREE MONTH INTERVAL

5o10 During the next interval, it is expeoted that the following tasks

will be oompleted,

5oll The console will be completely assembled and wired.

5.12 Final system testing will be completed.

5.13 The Speotrum Analyzer will be shipped.IIIIIIIIIIII

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I REVISIONS

- N -S

ISSUE DESCRIPTION DATE BY

aPRIL MAY JUNE JULY AUG SEPT OCT tK)OV DEC

1962

MSION$ IN INCHES, UNLESS DRAWN

"E S/EIFID64 TOLERANCTSR ANALYZE APPLIED RESEARCH INC.

. WILLIAMC PROJE.CT PERFORMANCE EORT WASHNGTONCHECKED P NEW YORK

APPROVED AhD SCHEDULE CHART D W G *• ZE SF-138APPROVED Iie_ B

SCALE UNIT WT. B ISSUE

I o• Z F•

JAN FEB Ml c ::H: C ,PRIL

I.-NGINEERI7NG DE'VELOPMINT _

2,MEC--tHAfIIC'- L. DE- I N

3. FA B RI AT:ON

1 .FINAL TE ST

196,3

WORK COMPLETZ.D

W0RJWOK TO BE CCMPLETED

ALL DIMENSIONS IN INCHES, UNLESSOTHERWISE SPECIFIED TOLERANCES: 3.FRACTIONS ± 1/64 ANGLES " 1/2

DECIMALS XX ± .010 XXX ±.005 O

MATERIAL:C

APFINISH:

JOB NO, NEXT ASSEMBLY Al

APPLICATION

OGILVIE PRESS, INC.. BROOKLYN 17, N. Y. ULTRAVEL NO. 490M

REVISIONS

ISSUE DESCRIPTION DATE BY

lA :C H4 AP•IL

-DRAWN

196

;ONS IN INCHES, UNLESS DRAWNSPECIFIED TOLERANCES! L I..-.3 APPLIED RESEARCH INC."116 ANGLES ±X 1.OO DRAWN my p JPPECRTUM ANALYZER

± .01 X xx ± .0 5 1 M ,P O R T W A S H IN G T O NCHECKED E PEFCRMANCE NEW YORK

APPRovED AND SCHEDULE CHARTAPPROVED B

SCALE UNIT WT. BISSU-

F / ,% - _ I o r