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  1. #1
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    Default Radar Receiver Technical Question

    I think Jim might know the answer to this.

    What is the difference between the following two radar receivers?

    Superheterodyne, GaAs FET VCO

    Superheterodyne, Varactor-Tuned VCO


    Thanks.

  2. #2
    Speed Demon
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    Default



    This is the information for the original Passport (late 80's?-early 90's?) from Cincinnati Microwave that detected only X and K band. Check out the type of antenna it uses, sound familiar?

  3. #3
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    Default Re: Radar Receiver Technical Question

    Quote Originally Posted by stealthJamal
    I think Jim might know the answer to this.

    What is the difference between the following two radar receivers?

    Superheterodyne, GaAs FET VCO

    Superheterodyne, Varactor-Tuned VCO


    Thanks.
    One oscillator uses a varactor, one uses a GaAs FET But seriously:

    Superheterodyne, Varactor-Tuned VCO
    This kind "tunes" the local oscillator by varying the voltage applied to a varactor diode...these have been around for a long time in TV tuners, and commercial gunnplexers have them for tuning/modulation...

    Superheterodyne, GaAs FET VCO
    This one, I don't know for sure...
    Probably newer technology though. I was under the impression that newer detectors used DROs instead of gunn microwave sources, DROs are more stable but put out less power. I guess a DRO using a GaAs FET would qualify as a "GaAs FET VCO"...

    The "Superheterodyne" part basically means that it uses the LO to mix the signals down to a freq that can be handled more easily...

    Jim

  4. #4
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    Default

    just wondering because the Bel RX65 and the Original 8500 have:
    Superheterodyne, GaAs FET VCO

    The X50 has:
    Superheterodyne, Varactor-Tuned VCO

  5. #5
    Radar Fanatic
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    Default radar receiver

    What type of receiver does the V1 have?

  6. #6
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    Default

    Quote Originally Posted by stealthJamal
    just wondering because the Bel RX65 and the Original 8500 have:
    Superheterodyne, GaAs FET VCO

    The X50 has:
    Superheterodyne, Varactor-Tuned VCO
    That is very strange... i thought everyone said that the X50 and RX65 share the SAME hardware platform (or 99.999% the same)? It sounds like they use completely different hardware actually?

 

 

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