Radiosystem RS 923 Communications Service Monitor
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Modelo:
RS 923
Data:
1983
Categoria:
Grupo:
Descrição:
Line Monitor
Informação
The purpose of the line monitoring unit is to provide
modulating AF and a means of listening in on the lines from
and to the MTX at line level settings. The unit contains an
1 kHz tone generator and a two-input audio Amplifier with a
loudspeaker.
The unit is connected to the line connectors on the front
panel of the channel units. Three separate cables can be
used, all of them connected to the same connector on the
monitoring unit. The use of the three pairs of sockets is
indicated by white lines to the level setting potentiometers.
The audio Amplifier consists of separate, differential line
Amplifier stages Q2 with balanced, high impedance inputs and
a common driver stage Q1 for the loudspeaker. The audio
levels can be set individually with potentiometers R22 and
R23- The input stages are protected against high transients
on the lines by diodes connected to the +24 V supply and ground.
The audio Oscillator consists of an oscillating circuit with
two operational amplifiers Q2, and an Amplifier stage Q1
with a 600 ohms transformer output. The audio level is
regulated by potentiometer R21.
The Power Supply is the nominal +24 V paralleled supply.
Power on is indicated by LED Dll.
Tipo de manual:
Cirquit Diagrama
Páginas:
7
Tamanho:
3.02 Mbytes (3165692 Bytes)
Idioma:
english
Revisão:
ID de manual:
Data:
1983 01 01
Qualidade:
Documento Scaned, a leitura parcialmente mal, não parcialmente legível.
Data de upload:
2016 10 04
MD5:
e59fbf7bc0b3b63257957729ff74779d
Downloads:
538