Racal 1774 Ricevitore
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Modello:
1774
Data:
1976
Categoria:
Gruppo:
Descrizione:
HF Communications Receiver
Informazioni
1 . The RA. 1771 and RA. 1772 are fully synthesized solid
state communications receivers providing reception
facilities for LSB/USB (A3A, A3H, A3J), AM(A3) and CW(A1).
ISB (A3B), FSK(F1) and AFC facilities are provided by
optional, internally fitted, modules. In addition, a manual
RF tuning unit may be fitted.
2. The built-in synthesizer is phase-locked to the output of
a frequency standard, which may be either internal or
external, and covers the frequency range 15kHz to 30MHz
in switched 1MHz bands. In the RA.1771, the kHz setting is
selected by rotary decade switches, with digital indication
in 10Hz increments, while in the RA.1772 the synthesizer is
continuously tunable over each 1MHz band and on electronic
readout indicates the kHz setting to 10Hz. Except for the
method of frequency selection both receivers are designed to
the same specification.
Tipo di manuale:
Manuale di servizio
Pagine:
84
Dimensione:
3.47 Mbytes (3639670 Bytes)
Lingua:
english
Revisione:
ID del manuale:
Data:
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
2015 10 25
MD5:
c294a0bfd8a3a67622b1d6d126b07c4a
Scaricamenti:
2187
Informazioni
CHAPTER 1
CHAPTER 2
CHAPTER 3
Para.
TECHNICAL SPECIFICATION GENERAL DESCRIPTION
INTRODUCTION 1
BRIEF TECHNICAL DESCRIPTION 3
MECHANICAL DESCRIPTION 8 IDENTIFICATION OF VARIANTS
INSTALLATION
INTRODUCTION 1
REAR PANEL CONNECTIONS 2
Antenna Connection 3
Power Input Socket 4
Coaxial Sockets 5
Terminal Strip Connections 6
Earth Terminal 7 PREPARATION FOR USE
General inspection 8
Fuselinks 9
Voltage selector 10
Rear Panel Switches 11
Power Supply Connection 12
Phones 13
INITIAL SWITCH-ON 14
RA.1772 Tuning Check 15
Operational Check 16
TELEPRINTER DRIVE (FSK Versions) 17
FSK RELAY 20
EARTH CONNECTION 21
TELEGRAPH SUPPLY SELECTION 22
TRANSIT SCREWS 24
OPERATING INSTRUCTIONS
INTRODUCTION 1
FUNCTION OF CONTROLS 3
Receiver TUNING 4
LINE LEVEL ADJUSTMENT 6
CHAPTER 4
PRINCIPLES OF OPERATION INTRODUCTION RF BOARD
LOCAL Oscillator FIRST MIXER BOARD 34MHz GENERATOR BOARD
SECOND MIXER BOARD MAIN IF/AF BOARD ISB IF/AF BOARD
AUTOMATIC FREQUENCY CONTROL FSK BOARD