Which test fixture for MDI mode conversion measurement at 100Base T1 Compliance Test?

Question

For 100Base T1 Compliance Tests I have to perform the following measurements:

• MDI mode conversion loss adaptor verification
• MDI mode conversion loss and return loss

The software "Scope Suite" just tells me to use a "Text fixture" but not which one, see screenshot:

So which test fixture do I have to use?

Answer

There are two test fixtures you can use:

• RT-ZF7A or
• RT-ZF8 - section 1 "General Purpose SMA Adaptor"