di·plex·er
| \ -sə(r) \
plural -s
Definition of diplexer
: a combining network (such as an impedance bridge or a filter circuit) allowing operation of diplex transmission (as of a radar and a communication transmitter)
a simple diplexer may be used to feed the picture signal and the sound signal into the same antenna — Radio Corporation of America Review
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Merriam-Webster unabridged
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