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  2. Frequency modulation - Wikipedia

    en.wikipedia.org/wiki/Frequency_modulation

    For example, narrowband FM (NFM) is used for two-way radio systems such as Family Radio Service, in which the carrier is allowed to deviate only 2.5 kHz above and below the center frequency with speech signals of no more than 3.5 kHz bandwidth.

  3. Minor allele frequency - Wikipedia

    en.wikipedia.org/wiki/Minor_allele_frequency

    2. Find MAF/MinorAlleleCount link. MAF/MinorAlleleCount: C=0.1506/754 (1000 Genomes, where number of genomes sampled = N = 2504); [ 4 ] where C is the minor allele for that particular locus ; 0.1506 is the frequency of the C allele (MAF), i.e. 15% within the 1000 Genomes database; and 754 is the number of times this SNP has been observed in the ...

  4. Class of accuracy in electrical measurements - Wikipedia

    en.wikipedia.org/wiki/Class_of_accuracy_in...

    In electrical engineering, characteristics like current or voltage can be measured by an ammeter, a voltmeter, a multimeter, etc.The ammeter is used in series with the load, so the same current flows through the load and the ammeter.

  5. Amateur radio operator - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_operator

    Amateur radio operators are also known as radio amateurs or hams. The term "ham" as a nickname for amateur radio operators originated in a pejorative usage (like "ham actor") by operators in commercial and professional radio communities, and dates to wired telegraphy. [2] [3] The word was subsequently [when?] adopted by amateur radio operators.

  6. Conductivity (electrolytic) - Wikipedia

    en.wikipedia.org/wiki/Conductivity_(electrolytic)

    Determination of the precise temperature coefficient for a specific solution is simple and instruments are typically capable of applying the derived coefficient (i.e. other than 2%). Measurements of conductivity σ {\displaystyle \sigma } versus temperature can be used to determine the activation energy E A {\displaystyle E_{A}} , using the ...

  7. Accuracy class - Wikipedia

    en.wikipedia.org/wiki/Accuracy_class

    Class 0.5 is an ANSI C12.20 accuracy class for electric meters with absolute accuracy better than ± 0.5% of the nominal full scale reading. [1] Typically, a class specifies accuracy at a number of points, with the absolute accuracy at lower values being better than the nominal "percentage of full scale" accuracy.

  8. Wow and flutter measurement - Wikipedia

    en.wikipedia.org/wiki/Wow_and_flutter_measurement

    The maximum meter indication should be read as the flutter value. The following standards all specify the weighting filter shown above, together with a special slow-quasi-peak full-wave rectifier designed to register any brief speed excursions. As with many audio standards, these are identical derivatives of a common specification. IEC 386 ...

  9. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    1 km 2 means one square kilometre, or the area of a square of 1000 m by 1000 m. In other words, an area of 1 000 000 square metres and not 1000 square metres. 2 Mm 3 means two cubic megametres, or the volume of two cubes of 1 000 000 m by 1 000 000 m by 1 000 000 m, i.e. 2 × 10 18 m 3, and not 2 000 000 cubic metres (2 × 10 6 m 3).