User manual

Rev Australasia V2.3 12/04
7 7
Portal Antenna: The portal antenna is an optional replacement for the flat panel
antenna and forms a tunnel that is placed in a stock race. The tunnel can be used bi-directionally. It is
a structure formed from plastic that has a vee section base and rises from the ground at an angle of
around 60 degrees as shown in the image and sketches below. Note – the portal joins to the control
box via the blue cable supplied.
Into the structure an antenna is wound an antenna. The antenna involves multiple turns of
conductor to form a loop. The loop runs parallel to the edge of the structure so the animal will
pass through the loop as it enters the portal / tunnel.