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G3S-800-140-031 Installation & Service Manual

044-05095 Rev. A 2-1 September 2001

Section 2 Installation

2-1 Introduction

This section contains installation recommendations, unpacking, inspection, and installation in-

structions for the Multicarrier Cellular Amplifier. Carefully read all material in this section prior to

equipment unpacking or installation. Also read and review the operating procedures in Section 3

prior to installing the equipment. It is important that the licensee perform these tasks correctly

and in good faith. If applicable, carefully review the Federal Communications Commission (FCC)

rules as they apply to your installation. DON'T TAKE CHANCES WITH YOUR LICENSE.

2-2 Electrical Service Recommendations

Powerwave Technologies recommends that proper AC line conditioning and surge suppression

be provided on the primary AC input to the +27 Vdc power source. All electrical service should

be installed in accordance with the National Electrical Code, any applicable state or local codes,

and good engineering practice. Special consideration should be given to lightning protection of

all systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors

are recommended in the service entrance. Straight, short ground runs are recommended. The

electrical service must be well grounded.

Each amplifier system should have its own circuit breaker, so a failure in one does not shut off

the whole installation. Circuit breakers should be capable of handling the anticipated inrush cur-

rent (normally 25% over equipment maximum current draw), in a load center with a master

switch. A 70-amp circuit breaker installed in the power distribution unit is recommended for each

amplifier. Either 2 or 4 AWG DC wire should be installed for each amplifier based on the cable

design and length.

Table 2-1 Averaged Current

Amplifier

Power

No. Of

Amplifiers

3 Sector

Averaged Current

2 Sector

Averaged Current

1 Sector

Averaged Current

140 12 588

140 9 441 504

140 6 294 336 378

140 1 49 56 63

2-3 Air Conditioning

Each G3S-800-140-031 amplifier generates 5971 BTUs of heat at full power. A fully populated

MCR30829-1-3 subrack operating at full power will generate 17,913 BTUs of heat. A full three-

sector site employing three fully populated MCR30829-1-3 subracks will generate 53,739 BTUs

of heat at full power (360W per subrack). A five-ton air conditioner is needed to cool this Power-

wave equipment. A full three-sector site probably needs at least a five-ton air conditioner to cool

all of the site's equipment, based on heat load averaging as described in table 2-2. Since all the

amplifiers are not running at full capacity at the same time in normal operation, table 2-2 de-

scribes the heat load for a 3 sector (70%), 2 sector (80%) and omni (90%) site. Perform a site

survey to determine actual air conditioning needs.

Summary of content (5 pages)

PAGE 1
G3S-800-140-031 Installation & Service Manual Section 2 Installation 2-1 Introduction This section contains installation recommendations, unpacking, inspection, and installation instructions for the Multicarrier Cellular Amplifier. Carefully read all material in this section prior to equipment unpacking or installation. Also read and review the operating procedures in Section 3 prior to installing the equipment. It is important that the licensee perform these tasks correctly and in good faith.
PAGE 2
G3S-800-140-031 Installation & Service Manual Table 2-2 Averaged Heat Loading Amplifier Power No. Of Amplifiers 3 Sector Averaged BTU's 2 Sector Averaged BTU's 1 Sector Averaged BTU's 140 12 50,156.4 140 9 37,617.3 42,991.2 140 6 25,078.2 28,660.8 32,243.4 140 1 4,179.7 4,776.8 5,373.9 2-4 Unpacking And Inspection This equipment has been operated, tested and calibrated at the factory.
PAGE 3
G3S-800-140-031 Installation & Service Manual WARNING Verify that all circuit breaker switches on the power distribution panel are in the OFF position. Turn off external primary DC power before connecting DC power cables. 5. Connect positive primary power and negative primary power to the subrack. Tighten the subrack power connections. 6. Verify that the plug-in amplifier’s front panel On/Off switch is in the Off position. 7.
PAGE 4
G3S-800-140-031 Installation & Service Manual 2-6.1 Amplifier Module Status, Alarm, Control, And Power Connector The amplifier has a separate remote alarm and control connector, which may be used by the host system to monitor and control the individual amplifier modules. The status, alarm, control, and power connections on the amplifier connector are made through a 21-pin male D-Sub combo connector (figure 2-2) and are listed and described in table 2-3.
PAGE 5
G3S-800-140-031 Installation & Service Manual 2-6.2 Amplifier Module RF Connector The amplifier has separate RF connectors, which are used for the RF signal input and output. The RF connections on the amplifier connector are made through two BMA female coaxial connectors (figure 2-3) and are listed and described in table 2-4.