Operations Manual

EXI HALO Installation & Operation Manual 981-000003-000R4.0
EXI Wireless Systems 24 October 2001
Figure 3 – HALO Receiver Settings
4.5.1 THRESHOLD SWITCH
The Threshold switch may be adjusted to increase or reduce the sensitivity of the Receiver and
therefore the range of detection of the Tag. It is also used to reduce or remove some of the
background noise if the Receiver is having trouble detecting tags.
Set the threshold switch at “F” initially, which is the maximum sensitivity setting. Turn the switch
counter-clockwise until the “Radio” light is extinguished, which indicates that the threshold of the
Receiver has been set to overcome any RF ambient noise. The Receiver should be able to detect a
Tag from about a 25’ radius within the protected perimeter at this setting. This detection area is
highly dependent on the layout of the floor, which in turn influences the placement of the Receivers
on that floor.
Generally, ensure that the whole floor has adequate coverage, and eliminate any “null” areas from
which a Tag removal cannot be detected. In the event that the switch setting is required to be below
“A” to overcome noise, it is highly recommended that the noise source be identified and fixed, as a
very low Receiver threshold setting will compromise the tag detection distance, or may even
prevent tag detection altogether.
Receivers have unique serial numbers that are associated with the location that they serve. Ensure
that the correct Receiver is used at the location being entered on the floor plan in the computer!