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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.
Assuntos
Texto completo: 1 Coleções: 05-specialized Base de dados: DESASTRES Assunto principal: Rádio / Telemetria / Venezuela País/Região como assunto: America do sul / Venezuela Idioma: En Ano de publicação: 1993 Tipo de documento: Congress and conference / Monography
Texto completo: 1 Coleções: 05-specialized Base de dados: DESASTRES Assunto principal: Rádio / Telemetria / Venezuela País/Região como assunto: America do sul / Venezuela Idioma: En Ano de publicação: 1993 Tipo de documento: Congress and conference / Monography