FMUSER Wirless Transmit Video And Audio More Easier !

[email protected] WhatsApp +8615915959450
Language

    Amplifier parameter explains

    Working frequency limits (F) :
    Show amplifier satisfies the working frequency limits of various index. The working frequency limits with effective amplifier may be more than the working frequency limits of the definition.

    Power gain (G) :
    Show amplifier outputs the ratio of power and power input, the unit is commonly used " DB " .

    Gain evenness spends (Δ G) :
    Point to fall in constant temperature, inside limits of whole job frequency, the limits that amplifier gain changes. Gain evenness spends express by next type (see a picture 1) :

    Graph 1
    Δ G= ± (Gmax-Gmin) / 2dB
    Δ G: Gain evenness is spent
    Gmax: Gain -- the extent maximum of frequency sweep curve
    Gmin: Gain -- the scope of frequency sweep curve is the least value

    Noise coefficient (NF) :
    Noise coefficient is to show input end believes comparing of a confusion of voices and amplifier output end to believe the ratio that a confusion of voices compares, the unit is commonly used " DB " .
    Noise coefficient expresses by next type: A confusion of voices of letter of NF=10lg(input end is compared / a confusion of voices of output end letter is compared)
    The noise coefficient in amplifier is lower (for example NF<1) below the circumstance, normally the noise coefficient of amplifier uses noise temperature (T) will express.
    The relation of noise coefficient and noise temperature is: T= (NF-1) T0 or NF=T/T0+1
    T0- absolutely temperature (290K)
    The conversion table of noise coefficient and noise temperature (see a picture 2)

    1 decibel compresses a dot to output power (P1dB) :
    Amplifier has a linear and dynamic range, inside this limits, the output power of amplifier increases along with power input linear. This kind of amplifier says for linear amplifier, of these two power comparing is power gain G. Increase as power input continuity, amplifier is entered nonlinear area, its output power follows the addition of power input no longer and linear increases, that is to say, its output the cost that power predicts under place of small signal gain. The output power when dropping gain to lower than linear gain 1dB normally is worth a definition to reduce a point to output the 1dB of power, express with P1dB. (see a picture 3)

    Below typical situation, when power exceeds P1dB, gain will drop quickly and achieve the biggest or completely saturated output power, its are worth bigger than P1dB 3-4dB.

     

    3 rank cut nod (IP3) :
    Those who measure amplifier is nonlinear characteristic, the simplest method is to measure 1dB to compress bit of power n P1dB. Another very popular method is to use two apart the 5 adjacent signal to 10MHz, when these two signal that are F1 and F2 when frequency add an amplifier, the output of this amplifier contained these two signal not only, and the intermodulation weight that also included frequency to be Mf1+nf2 (IM) , here, call M+n the rank number of intermodulation heft. When medium and saturated n, removing those who control function normally is the most adjacent of fundamental frequency 3 rank heft (see a picture 4) .

    Because 3 rank till distortion very severe drop is rising to control function, so commonly used 3 rank cut are nodded (IP3) come token intermodulation distortion (see a picture 3) . Point of 3 rank check is a when describe amplifier linear rate main index. 3 rank cut nod the model of power to be worth taller than P1dB 10-12dB. IP3 can get through measuring IM3, computational formula is:

    List all Question

    Nickname

    Email

    Questions

    Our other product:






      Enter email  to get a surprise

      fmuser.org

      es.fmuser.org
      it.fmuser.org
      fr.fmuser.org
      de.fmuser.org
      af.fmuser.org ->Afrikaans
      sq.fmuser.org ->Albanian
      ar.fmuser.org ->Arabic
      hy.fmuser.org ->Armenian
      az.fmuser.org ->Azerbaijani
      eu.fmuser.org ->Basque
      be.fmuser.org ->Belarusian
      bg.fmuser.org ->Bulgarian
      ca.fmuser.org ->Catalan
      zh-CN.fmuser.org ->Chinese (Simplified)
      zh-TW.fmuser.org ->Chinese (Traditional)
      hr.fmuser.org ->Croatian
      cs.fmuser.org ->Czech
      da.fmuser.org ->Danish
      nl.fmuser.org ->Dutch
      et.fmuser.org ->Estonian
      tl.fmuser.org ->Filipino
      fi.fmuser.org ->Finnish
      fr.fmuser.org ->French
      gl.fmuser.org ->Galician
      ka.fmuser.org ->Georgian
      de.fmuser.org ->German
      el.fmuser.org ->Greek
      ht.fmuser.org ->Haitian Creole
      iw.fmuser.org ->Hebrew
      hi.fmuser.org ->Hindi
      hu.fmuser.org ->Hungarian
      is.fmuser.org ->Icelandic
      id.fmuser.org ->Indonesian
      ga.fmuser.org ->Irish
      it.fmuser.org ->Italian
      ja.fmuser.org ->Japanese
      ko.fmuser.org ->Korean
      lv.fmuser.org ->Latvian
      lt.fmuser.org ->Lithuanian
      mk.fmuser.org ->Macedonian
      ms.fmuser.org ->Malay
      mt.fmuser.org ->Maltese
      no.fmuser.org ->Norwegian
      fa.fmuser.org ->Persian
      pl.fmuser.org ->Polish
      pt.fmuser.org ->Portuguese
      ro.fmuser.org ->Romanian
      ru.fmuser.org ->Russian
      sr.fmuser.org ->Serbian
      sk.fmuser.org ->Slovak
      sl.fmuser.org ->Slovenian
      es.fmuser.org ->Spanish
      sw.fmuser.org ->Swahili
      sv.fmuser.org ->Swedish
      th.fmuser.org ->Thai
      tr.fmuser.org ->Turkish
      uk.fmuser.org ->Ukrainian
      ur.fmuser.org ->Urdu
      vi.fmuser.org ->Vietnamese
      cy.fmuser.org ->Welsh
      yi.fmuser.org ->Yiddish

       
      1 字段 2 字段 3 字段 4 字段 5 字段 6 字段 7 字段 8 字段 9 字段 10 字段
  •  

    FMUSER Wirless Transmit Video And Audio More Easier !

  • Contact

    Address:
    No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China 510620

    E-mail:
    [email protected]

    Tel / WhatApps:
    +8615915959450

  • Categories

  • Newsletter

    FIRST OR FULL NAME

    E-mail

  • paypal solution Moneygram Western UnionBank OF China
    E-mail:[email protected]   WhatsApp:+8615915959450   Skype:sky198710021 Chat with me
    Copyright 2006-2020 Powered By www.fmuser.org

    Contact Us