Apparecchiature informatiche

Tracor 599J Converter
Produttore:
Modello:
599J
Data:
1978
Categoria:
Gruppo:
Descrizione:
MSK Converter

Informazioni

Some or all of the Navy VLF transmitters may at any time be using a form of code known as MSK (minimum-shift-keying). This is a type of frequency-shift-keying in which the bit frequency is equal to twice the difference frequency. In consequence, if a bit is transmitted at frequency #1, then one bit at frequency #2, and a third bit at frequency #1 again, the phase of frequency #1 during the third bit will differ by 180° from what it was during the first bit. Therefore, there is no coherent "carrier" at either of the two frequencies. By a process of frequency doubling, those transmissions at zero phase and those at 180° are restored to equal phase at the second harmonic frequency. Phase tracking of the 2nd harmonic with a VLF tracking receiver is then possible. INSTALLATION

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Manuale d'uso, Cirquit Diagramma
Tipo manuale:
Manuale d'uso, Cirquit Diagramma
Pagine:
17
Dimensione:
1.48 Mbytes (1548192 Bytes)
Lingua:
english
Revisione:
ID del manuale:
79384 D
Data:
01 settembre 1978
Qualità:
Documento scansionato, la lettura in parte male, non in parte leggibile.
Data di aggiunta:
05 ottobre 2019
MD5:
e30cc675cc664717dbbebeb8748fe6f7
Downloads:
280

Informazioni

Introduction 1 Installation 1 Operation With Strong VLF Signal 1 Use of Notch In Receiving Weaker Signal When Strong Local Signal Interferes 2 Theory of Operation 3 Antenna Coupler 3 List of Replaceable Parts 5 Federal Supply Code for Manufacturers (FSCM) 9 Schematic Diagrams Figure 1. MSK Converter 599J/K Tracor Drawing No. 79399B 10 Figure 2. Chassis Tracor Drawing No. 19356C 11 Figure 3. Antenna Coupler Tracor Drawing No. 19358C 12

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