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about LO solution used in spectrum analyzer

Vera Mao
Expert 5065 points

hi dear supporting team,

in Angilent spectrum analyzer, they use below circuit as local oscillator , it seems a sample circuit,   do we have similar solution?or do we have part of the solution?  do you know why they design the LO in this way? tks!

  • 0
    TI__Expert 5370 points
    Dear Vera,

    Thank you for your question. The synthesizer designed for the SA in your question is likely a discrete PCB circuit taking into consideration the phase noise/spur performance required, tuning range, tuning speed and frequency resolution. You can see switches depending if the span is large or narrow likely to improve phase noise in low span I suspect. We do not have a similar integrated circuit.

    Our synthesizer is a single loop PLL with multicore VCO. We do offers one octave of coverage with our VCO's so you have no gap in frequency synthesis. Our single loop PLL performance is best in class with -236 dBc/Hz FOM for example. We have frequency coverage to 19 GHz.

    Regards, Simon.
  • 0 in reply to Simon Damphousse
    TI__Expert 5065 points
    hi Simon,
    thank you for the reply!