How to measure RF Transformers

Discussion in 'Wireless & RF Design' started by AJMetal87, May 16, 2014.

  1. AJMetal87

    Thread Starter New Member

    Mar 15, 2013
    21
    0
    I am trying to do performance testing for this transformer next to the RJ45 to determine whether it is good or not. i do not have much knowledge on the networking side of electronics so any tips or tricks will help, i have a DMM, LCR, and O-scope for measuring equipment! We have multiple transformer brands so please disregard the brand of component, i just need a general answer
     
  2. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    I suggest taking it out of the circuit and using an ohm meter to make sure it is neither shorted nor open.
     
  3. AJMetal87

    Thread Starter New Member

    Mar 15, 2013
    21
    0
    where on the transformer should i measure across? since there are 16 pins. pin 16 and 14 are the secondary of the transmit side and pins 11 and 9 are the secondary of the receiving side? pins 1, 2 and 3 are the primary of the transmit side and pins 6, 7 and 8 are the primary of the recieving side. we typically deal with the pulse model. here is the data sheet http://media.digikey.com/pdf/Data S...0BASE-T Single Port SMD Magnetics_Rev2008.pdf
     
  4. AJMetal87

    Thread Starter New Member

    Mar 15, 2013
    21
    0
    its the HX1188NL model
     
  5. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    I would measure between pins 1 and 3, then 1 and 2
    then pins 16 and 14
    then pins 6 and 8 then 6 and 7
    then pins 11 and 9

    If there is some resistance, good, if not there is an open circuit.
     
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