| 1. | The diplexer is a different device than a passive combiner or splitter.
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| 2. | Transmitters whose frequencies are too close together cannot be combined successfully by a diplexer.
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| 3. | The diplexer must therefore have a stopband that is even wider than the passband.
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| 4. | A typical diplexer may have around 30 dB isolation between its L and H ports.
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| 5. | The ports of a diplexer are frequency selective; the ports of a combiner are not.
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| 6. | A diplexer frequency multiplexes two ports onto one port, but more than two ports may be multiplexed.
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| 7. | A diplexer is a device used to combine two signals occupying different frequency bands into a single signal.
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| 8. | Television diplexer consisting of a high-pass filter ( left ) and a low-pass filter ( right ).
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| 9. | These usually have an antenna input and a diplexer, so that the antenna signal is also distributed along with the satellite.
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| 10. | An especially common case of this is where the diplexer is used to split the entire spectrum into low and high bands.
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