? FNALREPORT PART II ~ ANALYSIS OF ADVANCED DATA TRANSMISSION TECHNIQUES - SEPTEMBER 1962 TO FEDERAL AVIATION AGENCY CONTRACT NO. 'FAA/BRD-80 lopeouad bV NATIONAL TECHNICAL INFORMATION SERVICE Spebog"Kl Vs- 221,51 | I GIIENERAL DYNAMICS I ELECTRONICS-ROCHESTER vro
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? FNALREPORT
PART II
~ ANALYSIS OFADVANCED DATA TRANSMISSIONTECHNIQUES
-
SEPTEMBER 1962
TO FEDERAL AVIATION AGENCY
CONTRACT NO. 'FAA/BRD-80lopeouad bV
NATIONAL TECHNICALINFORMATION SERVICE
Spebog"Kl Vs- 221,51
| I
GIIENERAL DYNAMICS I ELECTRONICS-ROCHESTER vro
FINAL REPORT
PART II
ANALYSIS OF ADVANCED DATA TRANSMISSION TECHNIQUES
S GENERAL OYNAMICS I ELECTRONICS-ROCHESTER
Rochester, New Yfork
September 1962
toFEDERAL AVIATION AGENCY
Contract No. FAA/BRD-80
"This report has been prepared by General Dynamics/Ejectronics-
Rochester for the Systems Research and Development Service, FederalAviation Agency, under Contract No. FAA/BRD-80. The conte:its ofthis report reflect the views of the contractor, who is responsiblefor the facts and the accuracy of the data presented herein, and donot necessarily reflect the official views or policy of the FAA."
PREPARED BY(G. C. PorterProject Engineer
L. M. LukeSection Head
APPROVED BY: 0, , g___;LA___
T. G. flameManagerCommunications and Electronics
Advanced Development Engineering
S]i
TM3LE OF CONTENTS - PART II
Page No.
INTRODUCTION 1
Section
3.0 TEST -ACILITY
3.1 Introduction 3-1
3.2 Function 3-1
3-3 Signal 3-1
3.4 Layout 3-2
3 5 Diagrams 3-3
3.6 Power Requirements 3-3
3.7 Facility 3-3
3.7.1 Clock Pulse Generator 3-3
3.7.2 Transmit Character Pu'.[se Generator 3-5
3.7.3 Receive Character Pulse Generator 3-6
[- 3.7.4 Pattern Generator 3-6
3.7.5 Receiving Register and Comparators 3-7
1 3.7.6 Mechanical Counters 3-8
3.7.7 Divide-by-10 Decimal Decoder and Meter Indicator 3-9
3.8 Facility Logic and Counter Functions 3-10
3.9 Facility Operating Procedure 3-10
3.10 Keyer and Converter 3-il
3.10.1 Keyer 3-121.
3.10.2 Band Pass Filters 3-13
1. 3.10.3 900 Phase Shift Integrator 3-13
3.10.4 Limiter Amplifiers 3-14
!!..
I °
V secTti• (IT? CONTENTS PART II (Cont :d.)
SSection Page No.
3.10.5 Driver Amplifiers 3-11.
3.10.6 Power Amplifiers 3-14
3.10,7 Phase Detector 3-15
3.10.8 Low Pass Filter and Emitter F',1lower Driver 3-15
3.10.9 Decision Circuit 3-16
3.10.10 Mixer Amplifier 3-16
3.11 Noise Feedback Control 3-16
3.12 Keyer and Converter Operating Proc dure 3-18
4.0 CONVERTER- DF,,IGN
4.1 Introduct Ion 4-1
4.2 Converter Operation 4-1
4.3 Converter Zrcuit Design 4-2
4.3.1 Mixer Ar olifier 4-2
4.3.2 Bandress Filters 4 34.3.3 Limiters 43
4.3.4 Integzretor 4-4
4.3.5 Driver azd Power Amplifiers 4-5
4.3.6 Phase Dtc.c 4-5
4.3.7 Low Pass riiver 4-6
k.j.• Deeision CLrcuit 4-7
4.4 Noise Source 4-7
4.5 Initial Converter Set Up 4-9
4.5 Converter Waveforms 4-10
4.7 Conclusions 4-12
iii
3
TABLE OF CONTk1TS - PART II (Cont'd.)
-ction
9.0 SCHEMATICS and BLOCK DIAGRAMS
S-1 Mechanical Conter Power Supply
S-2 Inverter, Two Input NOR Gate, Emitter Follower
Fig. 4.12 al Integrated output waveform of phase detector vs.to a3%
input 6ignal and reference waveforms for fo, fl, and
f 2 , respectively.
Fig. 4.12 bl Phase detector diode waveforms for fo, fl, and f 2 ,to b3
respectively, where total amplitude is 60 volts
peak-to-peak.
48 4-11
L 48
4--7 Conclusions
This section has presented some of the more important design
considerations and methods used to cope with them. A description
of the overall operation of the converter was given with special
emphasis on the more difficult concepts. Several waveforms were
photographed and appear here to demonstrate operation of the
converter and show the effects of noise. Although design of the
circuits is limited in many respects, proper adjustment of the
system will yield results which are close to the ideal.
The relationship between SNR ratio and pulse edge jitter (for-
tuitous distortion) is shown in a qualitative way in Fig. 4 .11a
and 4.11b.
4-12
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