DefinitionsDefinitions

Definitions

Note Unless defined below, words shall have the same meanings as in the Broadcasting Services Act, or the Radiocommunications Act, or the ITU Radio Regulations, as appropriate.

1. In this standard the following definitions apply:

channel means an AM broadcasting channel that is described in guidelines 2 and 3.

C‑QUAM means compatible quadrature amplitude modulation.

M signal means a signal equal to the sum of the left hand signal (L) and the right hand signal (R). This signal forms the compatible monophonic signal used to amplitude modulate the carrier.

necessary bandwidth means, for a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions.

out‑of‑band emission means an emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the modulation process, but excluding spurious emissions.

pilot signal means a sinusoidal signal used to phase modulate the carrier of a stereo transmission to indicate to the receiver the presence of a (C‑QUAM) stereo transmission.

S signal means a signal equal to the difference between the left hand signal (L) and the right hand signal (R). This signal forms the stereo difference signal used to phase modulate the carrier.

spurious emission means an emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products, but exclude out‑of‑band emissions.