Avaya Canada Corporation NTMQ75AA Manual De Usuario

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Picocell 1900 Antenna System Installation / 35
 September 4, 1998
Method 12-0152
Draft
 Appendix A - 4 Port Hybrid Insertion Losses
The 4 port hybrid provides isolation between opposite input ports and 
between opposite output ports while providing a nominal 3.5 dB 
splitting loss between adjacent inputs and outputs. Continuity is 
bidirectional  between adjacent Input and output ports  as shown below.    
Unused ports must be terminated in 50 Ohms to maintain hybrid balance 
and optimum port return loss.
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IN 1
IN 2
O U T   2
4 Port Hybrid Insertion losses
Opposite ports  25 dB (typical)
Adjacent ports  3.5 dB (typical)
O U T   1
IN 1
IN 2
O U T   2
O U T   1
Equivalent  schematic
used in this document.