trying to make a circuit to shift a frequency range to another range

Discussion in 'Computing and Networks' started by mo_dashti1, Mar 2, 2011.

  1. mo_dashti1

    Thread Starter New Member

    Mar 2, 2011
    2
    0
    hi. i have a DVB TV that works in frequency 6-8 MHz . i want to make a circuit that shifts another rang of frequency to this rang. (something like 8-10 MHz to 6-8 MHz).
    what can i do ?
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,789
    945
    use a local oscillator of 2 MHz, which when mixed with your signal will create the freq you desire. You will then need to band pass filter your mix to isolate the freq.

    Alt method. receive and remove the data from signal, then re-modulate the desired freq with the data and transmit that for reception by your TV(or whatever)
     
  3. mo_dashti1

    Thread Starter New Member

    Mar 2, 2011
    2
    0
    I'm going to shift frequency between 8-10 MHz to 6-8 MHz, do you think that mixing input signals with signals comes from oscillator (2 MHz) can cause decrease signal frequency ? and, whats the rule of band pass filter ? is it necessary ?
    [is it possible for you to make a simple scheme of this circuit ? ]
     
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