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Recent content by ropt728

  1. R

    setup requirements of a 50ohm impedance VNA to test a 75ohm product

    I am doing the same project as yours you will need to buy 75 ohm cable or adapter from minimum loss pad to your fixture the others cable can use 50ohm VNA-->50ohm environment-->MLP-->75ohm environement--fixture 50ohm environment From VNA till MLP, it depends If your...
  2. R

    75ohm 2-port SOTL Calibration

    is there any reference i can refer ?
  3. R

    75ohm 2-port SOTL Calibration

    Where can i get the info for custom setup ?
  4. R

    Measuring OIP3 in 75 ohm environment

    For a OIP3 measurement, we should be using splitter/combiner right ?
  5. R

    75ohm 2-port SOTL Calibration

    ANy pro out there Can guide me how to do this calibration ? I don't have the setting for the setup I am using Agilent PNA-X for Network analyzer Since i am using self-made cal board, i need to setup my own value and my own setup for this calibration or do i use default value ?
  6. R

    LNA output matching network

    I never use that before You can find from net for the guide whether does it support any smith chart utilities in it.If yes, then it will make your work easier a lot
  7. R

    LNA output matching network

    what software you using ? - - - Updated - - - You need to find out the impedance of your LNA, then do matching with Smith Chart
  8. R

    Measuring OIP3 in 75 ohm environment

    What if i setting up my 75 ohm environment with matching pads from 50ohm to 75 ohm, so i still need to use a balun ?
  9. R

    LNA output matching network

    You need to simulate using DC block and DC Feed to match the impedance
  10. R

    Measuring OIP3 in 75 ohm environment

    Hi all, I came through this process with some doubts If i am measuring OIP3 in 75ohm environment , means there will be two different frequency feed into my input. Does it cause any unbalanced output ?Do i need a balun to balance it ?:-|
  11. R

    Super Fast Noise measurement

    To all, When i setting up for my PNA-x for the measurement, Why do I need to set my IF Bandwidth below 1KHz ? Is there any specs for it or we defined ourselves ? All response are appreciated and welcomed Thank you
  12. R

    Calibration 75ohm in 50ohm environment

    thanks but, i already have the minimum loss pad.What i needed is the adapter from output of the MLP to the cal board The adapter have to be 75ohm nominal impedance, N-type (female) to SMA (male)
  13. R

    Calibration 75ohm in 50ohm environment

    hi all, I am calibrating for 75 ohm environment with matching pad 50-75ohm and 3.5mm 50ohm Rf cable and TRL cal board(75ohm) Problems starts here to calibrate off the loss for the matching pad, i need to connect a adapter to my matching pad. The adapter have to be 75ohm nominal impedance...
  14. R

    Difference between 50ohm board and 75 ohm board (Help needed)

    I know.My question is regarding the external components like inductor and caps, do i need to change their value when i changing termination impedance from 50ohm to 75ohm ?
  15. R

    Difference between 50ohm board and 75 ohm board (Help needed)

    the board i using is conductor backed coplanar waveguide My dielectric constant is 2.468 freq which i using is 2GHz
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