ETS-Lindgren 2090 Controller - Manual (Page 62)

Operation Model 2090 Multi-Device Controller
a small overshoot tolerance on this value, so, for example, a
current position of 99.5 will not cause an error when
switching to a polarization where the limit is 100.0.) Refer
to the section on “Editing Parameters” under
“Initialization” for information on checking or changing the
limits for the target polarization. In addition to a difference
in limits, the use of the Polarization Offset ( P4 ) on a
standard tower could make it so that the current position at
the target polarization is outside the limits, even though the
displayed current position is within the target limits. See
above for a description of the polarization offset.
NOTE: In order to toggle the polarization of the tower from
the front panel, the display must be showing the current
position, and not either limit.
NOTE: While the 2090 will allow the tower to be polarized
while in motion, it is strongly recommended that the device
only be polarized while stationary. The added stress on the
tower mechanism and the antennas increases the chance of
damage to both. Always insure that the applied weight and
overhung load of the antenna are within the specifications
of the tower prior to polarizing.
62 © ETS-Lindgren– April, 2006
Revision G– P# 399199