Advantech INTRAC-305 Maximum possible angles in the required direction, Auto New Model, Above

TECHNICAL DESCRIPTION	INTRAC-305
	within the soft limits?). If they are invalid the INTRAC sets the
	maximum possible angle(s) in the required direction and
	prompts the operator for action. If the co-ordinates are valid
	the INTRAC drives the antenna to those co-ordinates and
	enters Standby. The antenna can then be peaked using
	manual mode or search mode (see below) before selecting
	Auto New Model.
Note	If Auto Continue is selected at the end of Goto and there is a
	model in existence the INTRAC will continue to track using that
	model. To commence learning a new orbit either Auto New
	Model should be selected or any existing model cleared before
	selecting Auto Continue.
Goto Satellite	This mode allows one of the previously programmed satellites
	(up to 40 can be programmed) to be selected by number and
	its position driven to. Using the “Edit Satellite” sub menu of the
	Goto Satellite menu a new satellite can be added or an existing
	one edited. Having selected the required satellite pressing the
	enter key causes the antenna to be driven to that satellite. The
	INTRAC enters Standby when the antenna is at the satellite’s
	position. Antenna position peaking can then be carried out
	manually or in search mode (see below). To commence
	tracking this new satellite select Auto New Model or if there is
	no existing model Auto Continue may be selected. (see Note
	above)
Search	Search Mode conducts a search of the sky based on
	parameters entered in this menu. When the menu is entered
	the displayed parameters are those of the current antenna
	pointing. e.g. the parameters from a Goto move. If these
	parameters are not those required they may be edited in this
	menu. (see page 21)
	The search box size angles are plus and minus on the nominal
	angle. Thus entering 2° by 2° would cause a search box of 4°
	square.
	The search begins in the nearest corner of the defined box to
	the antenna’s current pointing. The search pattern is a “toast
	rack” or “serpent shape. The scanning comprises full scans in
	elevation for each move in azimuth. The azimuth move is
	equal to the 3dB beamwidth of the antenna commencing 1/2 of
	the 3dB beamwidth in from the edge of the box.
	The position of the highest beacon signal strength during these
	scans is recorded. At the end of the “serpentine” search the
	antenna is driven to the point of highest signal strength found
	during those scans and phase two of the search is
	commenced.
	This is the peaking phase and causes the antenna to search a
	smaller area of sky around the point of highest signal strength
	for the peak level. Again the position of the highest signal

Page 58 INTRAC-305 MANUAL - Issue 3.2 © 2011 Advantech Wireless