- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
Dyma’r fersiwn wreiddiol (fel y’i gwnaed yn wreiddiol). This item of legislation is currently only available in its original format. The electronic version of this UK Statutory Instrument has been contributed by Westlaw and is taken from the printed publication. Read more
Voltage and e.m.f.
References to the voltage or e.m.f. of a sinewave are references to its effective or root mean square value.
Decibel (abbreviated dB)
A unit of transmission giving the ratio of two powers.
If P1 and P2 represent two values of power, and n the number of decibels representing their ratio:
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If the two powers are dissipated in equal resistive impedances, their ratio in decibels may be expressed by:
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V1, V2 are the voltages across the two resistive impedances.
Terminal voltage calibration constant
The number of decibels that must be added to the reading of the measuring apparatus, when a measurement of terminal voltage is made as prescribed, to give the terminal voltage in decibels above 1 microvolt.
Field strength calibration constant
The number of decibels that must be added to the reading of the measuring apparatus, when a measurement of field-strength is made as prescribed, to give the value of field-strength in decibels above 1 microvolt per metre.
Y Diweddaraf sydd Ar Gael (diwygiedig):Y fersiwn ddiweddaraf sydd ar gael o’r ddeddfwriaeth yn cynnwys newidiadau a wnaed gan ddeddfwriaeth ddilynol ac wedi eu gweithredu gan ein tîm golygyddol. Gellir gweld y newidiadau nad ydym wedi eu gweithredu i’r testun eto yn yr ardal ‘Newidiadau i Ddeddfwriaeth’.
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