ETS-Lindgren 2090 Controller - Manual (Page 67)

Model 2090 Multi-Device Controller
USING A BORE SIGHT TOWER
To configure a Bore Sight tower, do the following:
Set P1 to 1 ; Define device as a tower
Set P2 to 1 ; Bore Sight Tower
Set P3 to 3, 10, or 30 ; Select distance to EUT
Set P5 to 0 or 1 ; Select type of bore sight
When in Bore Sight Mode, the height reported by the
Model 2090 is an adjusted height. This height is based on
the carrier height, boom length, and the distance to the
EUT. The shuttle height is the height that is normally
reported on the Model 2090. The boom length (the
distance between the pivot point and the antenna position)
is always assumed to be one meter in length. The antenna
position is assumed to be the location of the phase center of
the antenna or whichever point is used to measure the
adjusted height. The distance to the EUT is the distance in
meters between the antenna position at the base point and
the equipment being tested. The base point for beginning
calculating the Adjusted Height is at one meter. Therefore
the Bore Sight compensation is disabled under one meter.
The 2090 provides a correction lookup table for the
standard 2070 series towers (6 m mast) and an alternate
table for a custom tower design (5 m mast). Future
firmware revisions will be made to support any other bore
sight tower designs.
The following diagram shows the factors that come into
being when calculating the adjusted height for a standard
2070 series tower:
©ETS-Lindgren, April 2006 67
Revision G– P#399199