At 05:52 PM 1/31/99 -0700, Graeme Smith wrote:
>OK, let me see if I have this right...
>
>You use the center tap on the "OUTPUT" side of the transformers, for
>DC.


       XFMR                                                    XFMR
CLK        +CLK--------------wire----------------+CLK          CLK
               +12V                                    +12V
GND        -CLK -------------wire------------------CLK           GND

       XFMR                                                   XFMR
DAT        +DAT--------------wire----------------+DAT         DAT
               GND                                     GND
GND        -DAT-------------wire-------------------DAT         GND


Like that.   +12 feeds out through both + and - clk, as a common-mode signal
CLK is differential, so it shows up on the CLK xfmr output