Return loss question

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n7oq
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Joined: Sat Apr 28, 2018 6:49 pm

Return loss question

Post by n7oq » Sun Mar 30, 2014 7:00 pm

I'm getting ready to build some test fixtures and will be making a return loss bridge but I need one for 50 ohms and one for 75ohms. So can I make a RLB with a external reference and just change the reference from 50 ohms to 75 ohms? Or will I need to make 2 different RLB's? Also when using a 75 ohm bridge will I need to match the input and outputs to 50 ohms to match the MSA like  attenuators with 75 ohms in and 50 ohms out and vice versa?  Hope this make sense, thanks,Bill Verstelle

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