Experiences with VHF FM-FM radio-telemetry system in the Venezuelan Seismological Network
In. Trinidad y Tobago. University of the West Indies. Seismic Research Unit. Proccedings of the Caribbean Conference on Natural Hazards : Volcanoes, Earthquakes, Windstorms, Floods. St. Augustine, Trinidad y Tobago. University of the West Indies. Seismic Research Unit, 11-15 Oct.1993. p.209-19, ilus, mapas.
Monography
em En
| DESASTRES
| ID: des-5989
Biblioteca responsável:
CR3.1
Localização: CR3.1; DES
ABSTRACT
The Venezuelan Seismological Network (RESVAC) has been operating with a VHS FM-FM Radio-Telemtry System for several years. The network which started in 1981, initially with one station, now consists of 21 short-period and 1 long-period station, with 16 of the short-period stations being radio-telemetered. It is essential for seismological studies that high quality data be produced by these stations. Even through the cost of maintenance is high, we have tried to keep it to a minimum. We are applying an analogue frequency modulation radiotelemetry method with low-power carrier in our seismological network. The transmission band is 220-235 MHz. The maximum transmission power is 500 mW. The antennas are Yagi type with horizontal polarization. Our Voltage Control Oscillator sensitivity is 5 V pp imput producing +-125 Hz deviation in the sub-carrier.
Texto completo:
1
Coleções:
05-specialized
Base de dados:
DESASTRES
Assunto principal:
Rádio
/
Telemetria
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Venezuela
País/Região como assunto:
America do sul
/
Venezuela
Idioma:
En
Ano de publicação:
1993
Tipo de documento:
Congress and conference
/
Monography