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Discussion in 'Homework Help' started by dakanat, Nov 14, 2008.

  1. dakanat

    Thread Starter Member

    Nov 12, 2008
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    The super-heterodyne receiver has an IF of 470 kHz for AM and is tuned between the following frequency range 500 kHz – 1500 kHz.
    · What would be the range of frequencies must the Local Oscillator cover.
    · what would be an acceptable bandwidth for the IF amplifiers.
    What would the effect be on a selected signal, if the bandwidth were twice as large as necessary?
     
  2. hgmjr

    Moderator

    Jan 28, 2005
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    Is this question related to school work?

    If so, then let me know and I will move it to the "Homework" section where it belongs.

    hgmjr
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    That IF freq should be 455 KHz.
     
  4. dakanat

    Thread Starter Member

    Nov 12, 2008
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    yes its but i know the anwer
    the reson why i but it here bec i am not andersand it
     
  5. hgmjr

    Moderator

    Jan 28, 2005
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    If you can post your work in obtaining the answer then our members can help explain your results.

    hgmjr
     
  6. dakanat

    Thread Starter Member

    Nov 12, 2008
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    must be 10.7mhz
     
  7. hgmjr

    Moderator

    Jan 28, 2005
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    As I recall, 10.7 MHz is the IF associated with FM. Your original post indicated that your question was about AM. If AM is the subject, then beenthere is correct. The AM IF frequency is most often 455 KHz.

    hgmjr
     
  8. bertus

    Administrator

    Apr 5, 2008
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  9. dakanat

    Thread Starter Member

    Nov 12, 2008
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    0
    thanks for you feddback
    but can you give me shor answer for A, B and C

    Plz
     
  10. bertus

    Administrator

    Apr 5, 2008
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  11. beenthere

    Retired Moderator

    Apr 20, 2004
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    One problem with the specs given is that no figure for station bandwidth is given. The IF response is necessarily tailored to the signal bandwidth.

    Bertus' link give the information necessary to figure the local oscillator frequency.
     
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