Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

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PROPAGATION CHARACTERISTICS 97When R is large compared to one, (5) becomes:/ = F c + Fd cos pia2 sin — Fj9A'cos (pi + ~j cos issinf p< + y)-'4•(S )By an application of the addition formulas for the sine and cosine, togetherwith the Besscl function expansions for cos (x sin )and sin (x sin$) and the recurrence formulas for J„(x), (8) may be transformed intothe following:f = F, + Fj cos pta2F„, cos —o rRcos/3-j £ (2« + l)./ : „ +1 (-) cos (2» + l)(/;/+-0j-sin 0-j Y. 2nJ in sin 2// Pt + ^~)\ (0)Thus when
98 FREQUENCY MODULATION, Volume Iwave form. <strong>The</strong> increase of the distortion with increase in F d/Fmagrees with the observations that the lower modulation frequencieswere the most distorted and that the distortion seemed to be proportionalto the depth of modulation. Thus for modulation frequenciesgreater than one half the maximum modulation frequency where F d/Fmcan not be greater than two, a wave form similar to Fig. 8(D) would befi =
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FREQUENCY MODULATIONVolume IEdited
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1000-3000 watt FM transmitter—194
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:FREQUENCY MODULATIONVolume ICONTEN
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FREQUENCY MODULATION NOISECHARACTER
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NOISE CHARACTERISTICS 3w na - (u—
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NOISE CHARACTERISTICS 6to the ratio
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NOISE CHARACTERISTICS 7where C = ca
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•NOISE CHARACTERISTICS 9nF naF in
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NOISE CHARACTERISTICS 112G-)F1 aJ.
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ecurrent impulse. It isNOISE CHARAC
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NOISE CHARACTERISTICS 15constant sh
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NOISE CHARACTERISTICS 17/ 1 d(t)- (
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NOISE CHARACTERISTICS 19modulation
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.NOISE CHARACTERISTICS 21vary direc
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NOISE CHARACTERISTICS 23and frequen
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1NOISE CHARACTERISTICS 25curves for
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NOISE CHARACTERISTICS 27not conveni
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NOISE CHARACTERISTICS 29lation rece
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NOISE CHARACTERISTICS 31theoretical
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NOISE CHARACTERISTICS 33sponding or
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NOISE CHARACTERISTICS 35modulation
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NOISE CHARACTERISTICS 37signal was
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NC1SE CHARACTERISTICS .39Since the
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NOISE CHARACTERISTICS 41tude modula
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NOISE CHARACTERISTICS 43frequency m
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phase modulation maintained constan
Page 56 and 57: FREQUENCY MODULATION 47band pass of
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Page 60 and 61: FREQUENCY MODULATION 61frequency in
Page 62 and 63: FREQUENCY MODULATION 53maximum perm
Page 64 and 65: FREQUENCY MODULATION 55Frequency Mo
Page 66 and 67: BAND WIDTH AND READABILITY INFREQUE
Page 68 and 69: BAND WIDTH AND READABILITY 59The re
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Page 72 and 73: BAND WIDTH AND READABILITY 63The cu
Page 74 and 75: VARIATION OF BANDWIDTH WITH MODULAT
Page 76 and 77: VARIATION OF BANDWIDTH 67
Page 78 and 79: VARIATION OF BANDWIDTH0.0606 4998 7
Page 80 and 81: iVARIATION OF BANDWIDTH 71Example:
Page 82 and 83: ItVARIATION OF BANDWIDTH 73where 6
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A PRETUNED TURNSTILE ANTENNA*tByGeo
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CHARACTERISTICS OF THE PYLON FM ANT
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IMPULSE NOISE IN F-M RECEPTIONSByVe
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THE RATIO DETECTOR*!ByStuart Wm. Se
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—PUSH-PULL FREQUENCY MODULATED CI
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APPENDIX IFREQUENCY MODULATIONA Bib
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FREQUENCY MODULATION BIBLIOGRAPHY"F
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FM BIBLIOGRAPHY 511"Input Impedance
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APPENDIX IIFM STATION PLACEMENT AND
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STATION PLACEMENT AND FIELD SURVEY
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