Informations de l’équipement

Dymar Electronics Limited 1785 Autre
Dymar Electronics Limited
Modèle: 1785
Catégorie: Mètres
Groupe: Autre
Description: AM FM Modulation Meter
                                    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
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.

Ces manuels sont disponibles pour les équipements ci-dessus :

Dymar Electronics Limited -- 1785 -- Service et Manuel de l'utilisateur
Nom de fichier: Dymar-4084-Manual-Page-1-Picture
Type manuel: Service et Manuel de l'utilisateur
Pages: 34
Taille: 1.37 Mbytes (1439991 Bytes)
Langue: Anglais
Numéro d’identification:
Qualité: Document scanné, tous les lisible.
Télécharger date:
MD5: d5c697982ca35448db1a1d25258f4904
Téléchargements: 143 depuis 21 janvier 2013

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
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