Functional Description

150-409-115-05, Issue 5

 

 

ALTERNATIVE DOUBLER ENCLOSURE CAPACITIES

The number of doublers can be increased by two for applications where the enclosures are underground or not exposed to direct sunlight. However, any increase in capacity is still subject to rule 1 on page 4.

The doubler capacity numbers listed for each outdoor enclosure must be reduced by one for every additional

+5 °F (+2.8 °C) rise, or any fraction thereof, in outside ambient temperatures above +115 °F (+46.1 °C).

The capacities can be increased by one for every additional +5 °F (+2.8 °C) reduction in outside ambient temperatures above +115 °F (+46.1 °C).

Reduce the doubler capacity by one for every two doublers that do not have an empty slot between them. If the application allows seven doublers, but two are directly adjacent to each other, then the total capacity must be reduced to six.

Standard T1 repeaters can be installed in the same enclosure with doubler units. If this method is used, the maximum number of doublers that can occupy the same case with the standard repeaters must be reduced by one for every four T1 repeaters (or fractions thereof) installed. T1 repeaters located with doublers in outdoor enclosures should be placed in slots that are not adjacent to the doublers.

Rule 1 in the section titled “Doubler Enclosure Capacities with Full Solar Load” on page 12 does not apply if the adjacent slot is occupied by a T1 repeater.

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January 26, 2000

EDU-409 List 1