User Manual

ITEM # 602100022500
DOCUMENT TYPE: Operation and Installation Manual
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DOC #: 602100022500
PAGE 6 OF 17
TITLE: Bi-Directional Amplifier System
Service antennas are also fixed mounted and covered by the same MPE considerations as the donor
antenna. However, this assumes that the area is always general population/uncontrolled and that the
minimum distance in most installations will be less than 3 feet. According to Table 1(B) of Section
1.1310, the power density at 894 MHz is 0.596 mW/cm
2
. The maximum output power in the 48760
downlink (base to service area) is less then +27 dBm (500 mW). Assuming no feeder cable loss and
a service area antenna gain of 3 dB, a safe minimum separation of 10 inches (25 cm) is required to
stay within the MPE.
1.05 x 1000 mW/3.14 x 25
2
= 1050/1962.5 =0.535 mW/cm
2
Therefore, the service area antenna should be mounted such that no body part of any person may
come closer than 10 inches (or 25 cm). The service area antenna gain is 3 dB in the example above,
but may be increased to make up for cable and/or splitter or tap losses. For example, if a 2-way
splitter is used to provide for two antennas in different parts of the service area, then the antenna gain
may be increased to 6.6 dB to make up for the loss of the splitter 3.6 dB. The maximum service area
antenna gain for any specific location can be calculated as follows:
3dB+ accumulated losses to the antenna.
Product Overview
Field Tune-up, Alignment or Calibration
There is no field tune-up or calibration necessary for the 48760 bi-directional amplifier. These units
are aligned and calibrated at the time of manufacture and are designed to retain calibration
throughout the life of the product. Manual gain adjustment is provided to optimize the installation and
discussed in Section 10.
FCC ID and Canada Certification Numbers
The listed models have been tested and granted certification by the FCC in accordance with CFR
Title 47, Part 90 and by the DOC in accordance with RS 131, Issue 131.
The FCC identification number for each particular model appears on a label on the faceplate of the
unit. Applicable FCC identification and Canadian ISC numbers are as shown:
FCC ID Canada
IWD48760 1634B-48760