Crestron Antenna System SRD-ANT-1LD-PAK, Руководство по установке

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Antenna System Crestron SRD-ANT-1LD-PAK
Initially set up the antenna with its orientation approximately due south, at an up
elevation angle of approximately 45º. Use this as the starting spot and peak the signal
reception for maximum on one of the XM satellites using the antenna alignment
menu in the radio. The “Appendix” lists exact magnetic azimuth bearings and
elevation pointing angles for many major cities throughout the US and Canada.
SIRIUS Reception
SIRIUS has three satellites in elliptical orbits that are constantly moving over the
earth in a “figure 8”. These orbits are arranged so that two satellites are always in
view at any point in time at relatively high elevation angles (from + 45° to almost
90°) in the sky. Your antenna should be aimed at the “cross-over point” of the
“figure 8”, or about 96.5° West Longitude and 46° North Latitude.
The table and the figure below provide relative azimuth pointing guidelines for the
United States and Canada. Your antenna should be aimed for the “X” in the figure.
The “Appendix” lists exact magnetic azimuth bearings and elevation pointing angles
for many major cities throughout the US and Canada. Since the satellites’ positions
are constantly changing, signal strength will vary somewhat at different times of the
day.
SIRIUS Antenna Aiming Guidelines
AREA* ANTENNA AIMING DIRECTION NORTH AMERICA
AREA 1 Aim the antenna EAST, NORTHEAST, or SOUTHEAST
AREA 2 Aim the antenna NORTH or NORTHEAST
AREA 3 Aim the antenna NORTH or NORTHWEST
AREA 4 Aim the antenna WEST or NORTHWEST
AREA 5 Aim the antenna STRAIGHT UP at the sky
* Refer to the following illustration for approximate area definitions.
SIRIUS Antenna Aiming Areas, North America
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Antenna System: SRD-ANT-1LD-PAK Installation Guide – DOC. 6722A