User's Manual Part 4

ManualsBrandsADC Telecommunications ManualsElectronicsIn-building distributed antenna system

4-3

System Requirements

An LG

Cell

system has location, space, power, and safety requirements for

installation. The Dual Band LG

Cell

requirements for space and power are different

from those for a single-band system and are noted below.

System Location

The LGC

ell

Main Hub and Expansion Hub mount into a standard 19" equipment

rack in a wiring, telecom, or electrical closet, which may contain other Ethernet,

telephony, or miscellaneous equipment.

• Standard wiring closet temperatures: 0-45° C

• Does not require special air conditioning

Space Requirements

The LGC

ell

Main Hub and Expansion Hubs are installed into a standard 19” rack.

• The Main Hub height is 1.7” (44.5 mm). The Dual Band Main Hub is 3.5”

(88.9 mm) high.

• The Expansion Hub height is 1.7” (44.5 mm). The Dual Band Expansion Hub

is 3.5” (88.9 mm) high.

• Allow at least one inch (25 mm) clearance between each hub, between any

existing equipment in the rack, and between the bottom shelf of the rack and

the hub.

Power Requirements

The LGC

ell

requires AC voltage/current. LGC Wireless recommends connecting it

to a UPS (Uninterruptable Power Supply), which may exist in the wiring closet.

Dual-Band equipment requires twice as much power as single-band equipment.

• LGC

ell

operates with 88-264 VAC 50/60 Hz.

• The Main Hub uses a maximum of 1.6 A of electrical current.

• The Expansion Hub uses a maximum of 1.6 A of electrical current.

• The RAUs are powered from the Expansion Hubs via the UTP/STP cable and

they use 12V DC.

Summary of content (16 pages)

PAGE 1
System Requirements An LGCell system has location, space, power, and safety requirements for installation. The Dual Band LGCell requirements for space and power are different from those for a single-band system and are noted below. System Location The LGCell Main Hub and Expansion Hub mount into a standard 19" equipment rack in a wiring, telecom, or electrical closet, which may contain other Ethernet, telephony, or miscellaneous equipment.
PAGE 2
Underwriters Laboratory Installation Guidelines Use the following guidelines when rack mounting the LGC Cell: 1 Do not exceed the maximum ambient air temperature of 45° C during operation. Provide sufficient airflow and cooling within the rack to prevent heat build-up from exceeding this limit. 2 Be careful when servicing these products. If you are removing the system from the rack, turn it off and remove the power cord first. There are no user serviceable parts inside the hubs or RAUs.
PAGE 3
• Live work: Live work is permitted on the LGCell as it is a Class 1 hazard. • Signs: No warning signs are required. • Test equipment: Use Class 1 test equipment. Cable and Connector Requirements The LGCell equipment operates over standard TIA/EIA 568-A specification, Category 5 (CAT 5), or better, Unshielded Twisted Pair (UTP) or Shielded Twisted Pair (STP) and standard 62.5µm/125µm Multi-Mode Fiber cable (MMF), at a wavelength of 1300 nanometers (nm).
PAGE 4
LGCell system installation includes the following tasks: • Installing Main Hub • Installing Expansion Hubs • Installing Remote Antenna Units (RAUs) and antennas • Connecting RF cables • Connecting CAT 5 cables • Connecting MMF cables • Optimizing the system These procedures tell you how the LGCell should respond during various phases of the installation. If it is not responding as it should, see Section 6, Common Problems, Troubleshooting, and Frequently Asked Questions.
PAGE 5
This diagram illustrates how the LGCell is configured. The rest of this section contains configuration and installation procedures. Main Hub Installation Your installation may have one or more Main Hubs, each located in the same or different wiring closet. Use the following procedures for all Main Hubs.
PAGE 6
2 Connect Power and Power Up After mounting the Main Hub, connect the AC power cord to the Main Hub. Plug the power cord into an outlet providing AC power (88-264 VAC). See 1 in graphic. Power up the Main Hub by flipping the power switch from position 0 to position 1. See 2 in graphic. The POWER and SYNC LEDs on the front panel should be green (lit).
PAGE 7
The connections for the Dual Band system are shown here. Make sure you connect the 900 MHz Main Hub to the 900 MHz Expansion Hub and the 1800 MHz hubs together. Be sure the MMF cable ST-connectors are clean and free of dust or oils. If the fiber connector front face is not free of dust or oils, follow the manufacturer’s recommendations for cleaning it. The MMF cable is labeled with either 1 or 2, or is color-coded.
PAGE 8
Be sure to record which number or color is connected to UP and to DOWN. This information is needed when connecting the other end of the MMF cables to the Expansion Hub ports. 4 Check Main Hub LEDs The POWER and SYNC LEDs should be green. If not, reset the Main Hub. If the POWER and SYNC LEDs do not light green, see Section 6, Common Problems, Troubleshooting, and Frequently Asked Questions. The LINK STATUS and SYNC LEDs on the ports where the fiber is connected should be red.
PAGE 9
1 Mount the Expansion Hubs Mount the Expansion Hubs onto the rack in the assigned wiring closet location, using four screws per hub. For air circulation, be sure to leave at least one inch (25 mm) space between all hubs and between any other equipment in the rack. If mounting a hub on the rack’s bottom shelf, also leave at least one inch (25 mm) clearance from the bottom. 2 Connect Power and Power Up Connect the AC power cord to the Expansion Hub.
PAGE 10
3 Connect the MMF cables Connect all MMF cables from the Main Hub to the Expansion Hubs. The SYNC LED should be green. For proper connection between the Main Hub ports and the Expansion Hub ports, refer to the numbering or color coding you recorded when installing the Main Hub. 4 Check Expansion Hub LEDs Connect all MMF cables from the Main Hub to the Expansion Hubs. The LINK STATUS and SYNC LEDs on each Expansion Hub port should be red when the UTP/STP cable is not yet connected to the RAUs.
PAGE 11
5 SS ELE LGC ER WIR AC POW UP WN DO LGCel pan l ™ Ex sio n Hub C SYN R WE PO TS B POR IN HU MA Connect UTP/STP cables from RAUs Connect all UTP/STP cables coming from the RAUs to any available RJ-45 connector on the Expansion Hub. S K LIN S TU STA RT A PO NN TE AN C SYN ™E l l e LGC The Expansion Hub fiber port LINK STATUS and SYNC LEDs should be green or off. The LINK STATUS and SYNC LEDs on each Expansion Hub port should remain red until the RAU is connected on the other end.
PAGE 12
2 Mount RAUs and Antennas Mount all RAUs in their assigned locations, using the enclosed screws. The RAUs can mount above or below the ceiling, or to a wall. For connecting and mounting an accessory directional antenna, refer to the instructions shipped with that antenna.
PAGE 13
The Dual Band RAU mounting is shown below. 3 Connect UTP/STP Cable Connect the UTP/STP cable coming from the Expansion Hub to the RJ-45 connector on the RAU.
PAGE 14
For the Dual Band RAU, connect the 900 MHz Expansion Hub cable to the top connector and the 1800 MHz cable to the bottom connector. 4 Check LEDs The green POWER LED should be on and the red ALARM LED should be off. The green LED indicates that the RAU is receiving power from the Expansion Hub assigned to it. RF Cable Connection Before connecting any cables to the Main Hub, be sure the RF power level does not exceed the input rating for the Main Hub.
PAGE 15
Roof-Mounted Antenna N-Male to N-Male Coaxial Cables Surge Suppressor To Ground Connector Repeater N-Male to N-Male Coaxial Cables ™ LGCell Duplex Output Mai n a072 Uplink (Reverse) and Downlink (Forward) - Hub SS ELE LGC WIR ER UP N NSIO TO EXPA DOWN UP DOWN K LIN TUS STA C SYN K LIN TUS STA C SYN UP S PORT UP HUB K LIN TUS STA C SYN DOWN DOWN K LIN TUS STA C SYN C SYN ER AC POW POW 4 3 2 1 Main Hub Duplex Connector This N-type female connector is typically used to connect
PAGE 16
The duplex ports have a variable gain. Please see the table for system gain under “Maximum Input RF Power per Carrier vs. Number of Carriers” on page 17 in Section 2, LGCell Equipment. Downlink (Forward) and Uplink (Reverse) Connectors Connect an N-type male RF coaxial cable to the downlink N-type female connector (labeled FORWARD) and an N-type male RF coaxial cable to the uplink N-type female connector (labeled REVERSE) on the Main Hub back panel.