User's Manual

Installing the LGCell
9-12 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40
620004-0 Rev. B
Using the Duplex Port to Increase Gain on the Uplink
Because some types of LGCells have duplex ports with gains of 0, 30, or 40 dB,
depending on the frequency and protocol, you can use the simplex forward port for
the downlink signals and the duplex port for the uplink signals when gain on the
uplink is desired. Duplex port gain is shown in the table in Figure 9-3.
Connecting a Duplex Base Station to the LGCell Duplex/Simplex Ports:
1. Connect an N-male to N-male coaxial cable to the duplex connector on the base
station.
2. Connect the other N-male connector to a circulator.
3. Connect an N-male to N-male coaxial cable to the FORWARD simplex connector
on the Main Hub.
4. Connect the other end of the N-male coaxial cable to the transmit connector on the
circulator.
5. Connect an N-male to N-male coaxial cable to the DUPLEX connector on the Main
Hub.
6. Connect the other end of the N-male coaxial cable to the receive connector on the
circulator.
Figure 9-3 Duplex Base Station to LGCell Main Hub
REVERSE FORWARD DUPLEX
DIAGNOSTIC 2 DIAGNOSTIC 1
Microcellular
N-male to N-male
Coaxial Cable
Base Station
Duplex
T1/E1 to
Mobile
Switching
Center
Insert attenuator, if needed
N-male to N-male
Coaxial Cable
LGCell
Frequency/Format
Duplex Port
Gain (dB)
Simplex Port
Gain (dB)
800 MHz AMPS, TDMA 30 0
800 MHz CDMA 30 0
800 MHz iDEN 0 0
900 MHz GSM / EGSM 0 0
1800 MHz DCS/GSM 0 0
1900 MHz TDMA 40 0
1900 MHz CDMA 40 0
1900 MHz GSM 40 0
Circulator