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Frequency deviation and modulation meters
Modulation meter - a measuring device for determining the characteristics of the modulated RF signal - amplitude modulation coefficient (modulometry) and (or) a frequency deviation (deviometry). There combined instruments for measuring parameters such as amplitude and frequency and phase modulyatsiy.Po GOST 15094-86 [1] modulometry abbreviated designated starting with C2 symbols deviometry - C3, combined appliances - CK3.