Avaya Canada Corporation NTMQ75AA Manual De Usuario
12 / Picocell 1900 Antenna System Installation
Method 12-0152
September 4, 1998
Draft
4.0 Procedure
4.1 Overview
This Method includes procedures to mount and connect a Picocell 1900
antenna system. Picocell 1900 transceivers may be connected to
antennae directly or combined through hybrids to antennas. Appendix A
provides some reference information for 4 port Hybrids.
antenna system. Picocell 1900 transceivers may be connected to
antennae directly or combined through hybrids to antennas. Appendix A
provides some reference information for 4 port Hybrids.
Dual 4 Port Hybrid
The Dual 4 port hybrid shown in Figure 1 is a bi-directional RF device
which combines input ports to the output ports and provides isolation
between inputs. The 4 port hybrid Insertion loss is typically 3.5 dB or
less. Connecting one antenna from each transceiver to one 4 port hybrid
input configures each RF channel on all 4 antennae. Cell partitions with
2-4 antennas use a dual 4 port Hybrid. Cell partitions with 5-8 antennas
use a dual 8 port hybrid.
which combines input ports to the output ports and provides isolation
between inputs. The 4 port hybrid Insertion loss is typically 3.5 dB or
less. Connecting one antenna from each transceiver to one 4 port hybrid
input configures each RF channel on all 4 antennae. Cell partitions with
2-4 antennas use a dual 4 port Hybrid. Cell partitions with 5-8 antennas
use a dual 8 port hybrid.
Figure 1 – Single and Dual Picocell 1900 Antenna Configurations
IN 2
RF 3,4
O U T 2
RF 2
RF 1
RF 1
RF 2
RF 1,2
IN 1
RF 1,2
25 dB
3.5 dB
O U T 1
RF 3
RF 4
IN 3
IN 4
RF 3,4
RF 1,2
25 dB
O U T 4
O U T 3
3.5 dB
RF 1,2,3,4
RF 1,2
RF 1,2,3,4
RF 1,2,3,4
RF 1,2,3,4