Campbell-scientific RF300-Series DRL VHF/UHF Radio Transceivers Manual do Utilizador descarregar pdf (Página 62)

GLOSSARY

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RF Path - The designation of an RF link with

modem ID Numbers and modem commands.

RLQA (RF Link Quality Accumulators) -

Numbers which represent the quantity of

communication interruptions and the level of

communication noise.

Shutdown Block - Block of numbers which

contain the RF Link Quality Accumulators for

each modem in a terminated radiotelemetry

link.

Signal Power - Power of a signal at the

receiving radio, after power is lost through

transmission.

Start of Link Modem - The modem located at

the base station.

Squelch - Setting on the radio which specifies

the minimum power level which signals must be

received.

Sub Link - Any segment of an RF link which

begins and ends with an RF station.

Telecommunications Mode - A datalogger

status which enables communication from a

computer directly to the datalogger.

UHF (Ultra High Frequency) - Carrier

frequencies commonly in the range of 406 to

512 MHz.

VHF (Very High Frequency) - Carrier

frequencies commonly in the range of 130 to

174 MHz.

VSWR (Voltage Standing Wave Ratio) - The

ratio of the standing wave voltage across the

RF transmission cable at the high voltage points

to that at the low voltage points.

Unidirectional - Capable of operating only in a

single direction.

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