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Recent content by honeydewsan

  1. H

    Choice of Number of mixers and IF frequencies

    Because it depends on the selectivity required. It is easier to achieve higher selectivity at lower frequency.
  2. H

    help on vhdl code for qpsk modem...

    i need vhdl code for qpsk Check this topic
  3. H

    TDMA & spread spectrum

    Thanks for your replies. Does it mean that in TDMA for GSM, the frequency hops in every time slot allocated? Thanks.
  4. H

    TDMA & spread spectrum

    Can anybody tell me if TDMA can coexist with spread sprectrum? Thanks.
  5. H

    planning superheterodyne receiver IF frequency

    Thanks for the replies. The final IF bandwidth is 20MHz. Yes, I have a spread sheet to calculate mRF +/- nLO1 +/- nLO2 to calculate the mixer spur products due to the RF, LO1 and LO2. The question is what should my IF1 be. Should it be 1GHz, 2GHz, 3GHz, or 900MHz, 800MHz. After deciding the...
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    planning superheterodyne receiver IF frequency

    I would like to ask the experts on how to plan superheterodyne receiver IF frequencies. I am using double conversion. RF input is 9.3 GHz and final IF frequency is 70MHz. How do I choose first IF frequency? Dixon's receiver book mentioned the choice is dependent on bandpass filter rejection...
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    HP Application note #920

    diode comb generator schematic Here you can find some useful diode literatures. http://www.hp.woodshot.com/hprfhelp/lit/diodelit.htm Literature about Step Recovery Diodes and Comb Generators (Agilent Technologies no longer manufactures Step Recovery Diodes. This literature is now obsolete.)...

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