Philips FM1674 Transceiver
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Modelo:
FM1674
Data:
Categoria:
Grupo:
Descrição:
Local Base station
Informação
The TCA, FM1674
series of local base stations is designed
to meet the requirements of the radio telephone operator,
for a locally controlled station of pleasing appearance,
small size, and simple in design and operation.
The station unit consists of a sheet metal cabinet measuring
21 - V 4 " W x 13-V2"H x 15-V4"Deep, furnished in a gray
Hammertone Oven baked enamel, with a recessed front control
panel, on which are logically grouped the various controls
necessary to operate the equipment.
All controls and indicators are designated clearly with
photo etched lettering.
A practical feature is the provision of a Speech level
indicator, which clearly shows the operator the required
level to speak into the microphone to obtain maximum usage
of the system.
The whole of the radio telephone unit may be withdrawn from
the front of the cabinet to provide access for servicing.
A metering socket is provided on the back of the assembly
to meter all essential circuits.
The station unit follows the standard practice of the 1674
series of equipment where the necessary sub assemblies are
grouped together to provide radio telephone stations capable
of delivering various
R.F. power outputs to the Antenna and to be supplied from
either AC mains or from a battery as required.
Tipo de manual:
Serviço e Manual do Usuário
Páginas:
100
Tamanho:
5.05 Mbytes (5294273 Bytes)
Idioma:
english
Revisão:
ID de manual:
Data:
Qualidade:
Documento Scaned, a leitura parcialmente mal, não parcialmente legível.
Data de upload:
2017 04 02
MD5:
d8bbb9dbf913090ddc98989e9d3fb8b5
Downloads:
611
Informação
INTRODUCTION
SECTION A .
1.
General Description.
2.
Specification.
a.
General
b.
Transmitter
c.
Receiver
d.
A.C. Power Supply
e.
Battery charger Unit
f.
DC/DC Converter
SECTION 3 .
Mechanical Construction.
SECTION C .
Installation Instructions.
(1)
(2)
Mechanical
Electrical
a.
b.
o.
d.
e.
Switching unit on
Mute Control - Volume Control
Transmit
Speaking over the Transmitter
Simplex Operation
(3)
Tuning adjustments
a.
b.
Receiver
Iransmitter
SECTION D .
Receiver Detailed Description.
(1)
General
(2)
Specification of performance
(3)
Technical Description
3.1 General
3.2 Valve Types and function
Circuit Description
4.1 R.F. Section
4.2 First I.F.
4.3 Second Mixer - Crystal Osc.
4.4 Frequency Multipliers
4.5 Second I.F.
4.6 First Limiter
4.7 Second Limiter and Discriminator
4.8 Audio Stages
4.9 Muting Circuit
(5)
Receiver Alignment and Testing
5.1 Test Equipment required
5*2 Preliminary
5.3 Second I.F.
5.4 Limiters
5.5 Descriminator
5.6 Multiplipliers
5.7 First I.F. Amplifier
5.8 R.F. Alignment
(6 )
Measurement of performance
6.1 Quieting
6.2 Signal to Noise
6.3 Limiting Action
6.4 Audio Correction Network
6.5 Description
6 . 6 Selectivity
(7)
Typical Metering
(8 )
Circuit gain figures
(9)
Voltage Analysis
SECTION E .
Transmitter Detailed Description
(1)
General
1.1 Combination of Units for complete transmitters
1.2 Brief description of sub-units
1.3 Additional Units
1.4 Interconnection of Units
(2)
Specifications
2.1 FM1674.200
Driver Modulator
2.2 FM1674.425
- 7.5 watt Power Amplifier
2.3 FM1674.450
- 10.25 watt Power Amplifier
2.4 FM1674.475
- 50-75 watt Power Amplifier
2.5 FM1674.650
- R.F. Monitor Probe
(3)
Circuit Description
3.1 General
3.2 FM1674.200 Driver Modulator
3.2.1 Valve Types and Functions
3.2.2 Crystal Oscillator - Phase Modulator
3.2.3 Frequency Multipliers
3.2.4 Audio Amplifier
3.2.5 Audio Limiter
3.3 Power Amplifiers
3.4 R.F. Monitor Probe
(4)
Alignment and Testing
4.1 Test Equipment required
4.2 Driver Modulator Stage FM1674.200
4.3 Power Amplifier Stages
4.3.1 FM1674.425 - 7,5 watt
4.3.2 FM1674.450 - 1 0 - 2 5 watt
4.3.3 FM1674.475 - 5 0 - 7 5 watt
4*4 R.F. Monitor Probe FM1674.650
(5)
Measurement of Performance
5.1 Modulation measurements
5.2 Distortion and sensitivity
5.3 Frequency response
5.4 Limiter Setting
( 6) Voltage Analysis
SECTION F .
Power Supplies
(1)
FM1674.500/12, FM1674.520/12, FM1674.540/12
DC/DC Corrverter
(2)
FM1374/79 A.C. Power Supply
(3)
FM1674.82 Battery charger
SECTION G ,
Elcctrical Parts Lists
-
25F/50F
-
Local Base
SECTION H .
Circuit Diagrams
-
25F/50F
-
Local Base