The Routine Measurement of the Operating Frequencies of Broadcast Stations

Autor:	C.T. Manning, H.L. Bogardus
Rok vydání:	1929
Předmět:	Engineering Signal generator business.industry Electrical engineering Beat (acoustics) Broadcasting Multivibrator Frequency conversion Electronic engineering Frequency offset Radio frequency Electrical and Electronic Engineering business Radio broadcasting
Zdroj:	Proceedings of the IRE. 17:1225-1239
ISSN:	0096-8390
DOI:	10.1109/jrproc.1929.221803
Popis:	The method of making "zero beat" measurements of the operating frequencies of broadcast stations in the Second Radio District is described, showing the method of comparing the received signal from a broadcasting station with a signal of known frequency, obtained from a 10-kc multivibrator controlled by a 90-kc quartz crystal. There is also given a description of the method used in reducing the measurement to a flexible routine procedure while still maintaining an accuracy well within the 500-cycle limit established by the Federal Radio Commission.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2b255a774b2101e73d2e40432b17e6f7 https://doi.org/10.1109/jrproc.1929.221803 Zobrazit plný text záznamu