The trapezoid method of measuring amplitude modulation is a little more complicated but seems to give more precise measurements. An RF pickup coil can be used, however using a short antenna for pickup may not be satisfactory because of random reflections.
radiomagonline.com/transmission/radio_measuring_modulat... radiomagonline.com/transmission/radio_measuring_modulation/
Amplitude modulation is the simplest of the three to understand. The transmitter just uses the information signal, Vm(t) to vary the amplitude of the carrier, Vco to produce a modulated signal, VAM(t). Here are the three signals in mathematical form:
www.fas.org/man/dod-101/navy/docs/es310/AM.htm
A new method of measuring amplitude modulation-phase modulation conversion in microwave amplifiers. J E Carroll et al 1967 J. Sci. Instrum. ...
www.iop.org/EJ/abstract/0950-7671/44/8/304
Engineering technical paper: Amplitude Modulation Method for Measuring Linear Excursion of Loudspeakers ... A simple method for measuring the peak linear excursion capability (Xmax) of loudspeaker driver units is presented. The method measures ... The low-frequency signal is increased to produce a target peak-to-peak modulation.
www.sae.org/technical/papers/910650
A homomorphic processing, software implemented method for measuring secondary amplitude modulation (AM) is described. The accuracy of measurement of this method was tested on a series of synthetically produced AM and vowel signals.
jslhr.asha.org/cgi/content/abstract/37/4/800
BioInfoBank Library :: A homomorphic method for measuring secondary amplitude modulation. Enhancement of female esophageal and tracheoesophageal speech. Characteristics of voicing source waveforms produced by esophageal and tracheoesophageal speakers. ... J Speech Hear Res. 1994 Aug ;37 (4):800 ... A homomorphic processing,
lib.bioinfo.pl/pmid:7967565
There have been several methods of measuring conversion of amplitude modulation to phase modulation, the most successful of which are only useful in the laboratory with a considerable amount of expensive test equipment.
www.freepatentsonline.com/3787763.html
ANNOUNCEMENTS; Post your events, hamfests etc This board is an author Post only. The reply function has been turned off. ... Last post by Pete, WA2CWA in ARRL Sweepstakes - Phone... on November 16, 2009, 01:41:58 PM ... MODERN RIGS; Alternatives to Plate Modulation...
www.amfone.net/
A simple method for measuring the peak linear excursion capability (Xmax) of loudspeaker drive units is presented. The method measures the acoustic amplitude modulation of a small high-frequency signal by a very low-frequency.
www.aes.org/e-lib/browse.cfm?elib=5707
Hutchinson encyclopedia article about amplitude modulation. amplitude modulation. Information about amplitude modulation in the Hutchinson encyclopedia. ... The company's radio stations consist of 40 frequency modulation (FM) and 12 amplitude modulation (AM) stations located in Arizona, California, Colorado, Florida,
encyclopedia.farlex.com/amplitude+modulation encyclopedia.farlex.com/amplitude+modulation