Información del equipo:

Dymar Electronics Limited 1785 Otro
Fabricante:
Dymar Electronics Limited
Modelo: 1785
Fecha:
Categoría: Los instrumentos de medición
Grupo: Otro
Descripción: AM FM Modulation Meter
Información:
                                    The Dymar AM/FM Modulation Meter Type 1785 is an all
solid state instrument for the measurement of depth
of modulation or frequency deviation of transmitters.
It is operated either from A. C. Mains or from its own
rechargeable battery and as much is equally suitable as
a laboratory instrument or as a portable field servicing
equipment.
The frequency range covered is the whole of the V.H.F.
band and extends into the U.H.F. band to include
the mobile band of 470 MHz.
The sensitivity over the whole of this range is better
than 2.5 mV in 50 ohm (-40 dm) which permits loose
coupling to the transmitter under test.

The instrument is specifically designed for measurement
of narrow deviation transmitters in todays mobile
and portable radiotelephones, the most sensitive
deviation being 3 kHz. The local oscillator has low
residual F. M. noise of typically 44 db below 3 kHz.
Auxiliary outputs are provided both at the Intermediate
Frequency (500 kHz) for viewing the modulation envelope
and at Audio Frequency for measurement of distortion.

Estos manuales están disponibles para el equipo anterior:

Dymar Electronics Limited -- 1785 -- Servicio y Manual del usuario
Nombre del archivo: Dymar-4084-Manual-Page-1-Picture
Tipo de manual: Servicio y Manual del usuario
Páginas: 34
Tamaño: 1.37 Mbytes (1439991 Bytes)
Idioma Inglés
Revisión:
Manual-/ número de identificación:
Fecha:
Calidad: Documento Scaned, todo legible.
Fecha de carga:
MD5: d5c697982ca35448db1a1d25258f4904
Descargas: 128 desde 21 enero 2013
Información:
CONTENTS

1.	General Description,	1

2.	Specification.	2

3.	Operation,	5

4.	Technical description.	9

5.	Alignment procedure.	13

6.	Component List.	       16

7.	Circuit Diagrams,	29
Dymar-4084-Manual-Page-1-Picture
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