Simpson 77-380 Metro di livello
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Modello:
77-380
Data:
1961
Categoria:
Gruppo:
Descrizione:
Wavemeter
Informazioni
Since its introduction a few years ago the model 77-380 has
proved to be on of the most outstandingly successful pieces
of measuring equipment ever produced. This fact has been
attested by thousands of satisfied users throughout Canada,
the U.S.A. and Europe.
In producing this revised version of the 77-380
it has been
the intention to improve on the efficiency of the well
proven original circuit, and to extend the range of
usefulness still further by providing a greater frequency
coverage. Stability has been considerably improved by the
use of a very fine variable air spaced band setting trimmer,
while by the use of a unique coil tapping arrangement,
spurious responses have been eliminated but with no
sacrifice in the selectivity for which the 77-380 is famous.
The sensitivity of the new unit when used as a modulation
indicator has been greatly improved allowing considerably
reduced coupling to the transmitter as a result. In
addition, modulation checks can now be carried out with the
unit in a resonant condition, that is, with appropriate coil
in circuit and tuned to the frequency in question. In this
condition even greater sensitivity is provided on modulation
checks.
Tipo di manuale:
Servizio e manuale utente
Pagine:
29
Dimensione:
3.85 Mbytes (4039766 Bytes)
Lingua:
english
Revisione:
ID del manuale:
Data:
Qualità:
Documento scansionato, la lettura in parte male, non in parte leggibile.
Data caricamento:
2014 11 22
MD5:
9ff2091d7063c0f3053a444183bdf3f7
Scaricamenti:
1049
Informazioni
Foreword
...
2
General
...
4
Wavemeter Applications—
Band
Spread ... 6
None Band Spread ... 8
9
Field Strength
Indication ... 9
Standing Wave
Ratios ... 1 1
Quality
Monitoring ...
12
Modulation Indication — General ... 12
Over Modulation Indication ... 14
Percentage Modulation Indication ... 14
Percentage Modulation Measurements—
Tuned
...
16
Untuned
... 16
Use of Calibrated
Antenna ... 18
' Suggestions for the Care of the Wavemeter ... 20
General Frequency Coverage Data ... 22
Circuit
Diagram ... 23