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Using the "TC1 DESIQ Single Balun Board" in the reverse direction

UBWiNS Lab
Prodigy 20 points
Other Parts Discussed in Thread: ADC-LD-BB

The description here says that "It takes a single-ended signal (SMA input) and can drive the I+, I-, Q+ and Q- inputs ...".

I was wondering if this can be used in the reverse direction i.e. given the four I+, I-, Q+ and Q-  as inputs, get the single-ended SMA output at the other end?

If not, any suggestion for a board which can achieve this.

  • 0
    TI__Mastermind 43930 points

    Hi UBWiNS Lab

    The TC1 DESIQ Single Balun Board isn't designed to operate as a true splitter/combiner. It is only intended to be used in the SE input to dual balanced output configuration, with identical signal on the pairs of balanced output ports.

    What you are looking for would be 2 baluns to perform differential to single ended conversion, followed by a 2 port signal combiner. We do have 2 different balun boards available with different min/max frequency capabilities (ADC-LD-BB and ADC-WB-BB), but I don't think there are any 0-degree signal combiner boards available from TI.

    Best regards,

    Jim B

  • 0 in reply to Jim Brinkhurst1
    Prodigy 20 points

    Jim,

    Thanks for clarifying about the TC1 DESIQ. That prevents us from buying wrong equipment. We will go with 2 ADC-WB-BB balun boards. However, I had a follow-up question:

    Would we feed the I+ and Q+ to balun-1 and I- and Q- to balun-2 and then the output from the two baluns into the 0-deg. power combiner or is some other configuration more preferable?

  • 0 in reply to UBWiNS Lab
    TI__Mastermind 43930 points

    Hi

    I presume you are wanting to combine two differential 100 ohm signals into one single ended 50 ohm output.

    To do that, connect your first differential signal to the + and - balanced connectors of the first balun board. Connect your second differential signal to the + and - balanced connectors of the second balun board. Keep the polarities consistent for both signals/boards.

    Connect the 50 ohm SE connections of each balun board to the inputs of the signal power combiner.

    Best regards,

    Jim B