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4 November-2007 Bulletin II-102051-EN • Revision B

Bias Tees are installed on the antenna ports of one of the base stations. The diplexers must pass

DC through that branch. DC blocks must be present in the other branch, either integral to the

diplexers or in external devices as shown.

 #1+./0

In Figure 2, dual-band, diplexed Andrew OneBase™ TMAs are used with shared feeders and

shared antennas. OneBase™ diplexers at the BTS level incorporate DC redundancy circuitry,

automatically routing the DC to the feeder and blocking the opposite branch.

Figure 2: OneBase™ diplexed TMA system

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 31 32

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/1 4!- 22
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( 7 30

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Andrew Multimode Power Distribution Unit Guía de usuario Pagina 8

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