Or,
symmetrical ==
the signal is plus phase in one conductor and zero phase in
the other with reference to infinite ground.
examples:
twisted pair
twisted pair in shield
300 ohm TV lines
unbalanced ==
the signal is completely in one conductor [well, tries to
be completely in one conductor] and is referenced to the
other conductor, thus with respect to ground one conductor
is supposed to have 0 signal and the other has it all.
examples:
50 ohm coax
75 ohm coax
unknown coax for 600 ohm audio
My opinion:
waveguid is unbalanced, too
since the metal is at ground reference.
- Robert -
> In message <001d01c66781$124bafb0$13655ad2@LocalHost>,
> dated Mon, 24 Apr 2006, Kim Young-sik
> <[email protected]> writes
> >Hi, All
> >
> >When telecom line surge immunity test.
> >
> >unsymmetrically & symmetrically operated line???
> >
> >what is that mean?
> >
-
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