C-W and A-M Radio Transmitters and Receivers

Couverture
Department of the Army, 1952
 

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Table des matières

I
1
II
4
III
7
IV
10
V
26
VI
38
VII
78
VIII
110
IX
156
X
167
XI
195
XII
251

Expressions et termes fréquents

Fréquemment cités

Page 7 - Stated another way, the current in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance.
Page 80 - A2. Modulated telegraphy. A carrier wave modulated at one or more audible frequencies ; the audible frequency or frequencies or their combination with the carrier wave being keyed according to a telegraph code.
Page 81 - Telegraphy by the keying of a modulating audio frequency or audio frequencies or by the keying of the modulated emission (special case: an unkeyed modulated emission...
Page 16 - Therefore, we can say that the ratio of the primary voltage to the secondary voltage is equal to the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.
Page 80 - A4. Facsimile. Waves resulting from the modulation of a carrier wave by frequencies produced at the time of the scanning of a fixed image with a view to its reproduction in a permanent form.
Page 28 - ... grid voltage is applied. 4. A class C amplifier is one in which the grid bias is appreciably greater than the cutoff value, so that the plate current in each tube is zero when no ac grid...
Page 85 - A class B amplifier is an amplifier in which the grid bias is approximately equal to the cut-off value so that the plate current is approximately zero when no exciting grid voltage is applied...
Page 42 - The oscillations occur because energy is being interchanged between the electric field of the capacitor and the magnetic field of the inductor.
Page 29 - It is the ratio of a small change in plate voltage to the corresponding change in plate current, and is expressed in ohms.
Page 210 - ... the if wiring. Shifting the if or better shielding are the solutions to this interference problem. Fidelity: Sideband Cutting Amplitude modulation of a carrier generates sideband frequencies numerically equal to the carrier frequency plus and minus the modulation frequencies present. If the receiver is to give a faithful reproduction of modulation that contains, for instance, audio frequencies up to 5000...

Informations bibliographiques