Advantech user manual Fault Finding INTRAC-305

FAULT FINDING	INTRAC-305
Tracking Signal (IBR-L)	If the beacon signal falls to a non-usable level the INTRAC
	automatically enters Predicting Mode and continues to track
	the satellite from the model. There is no way of knowing from
	the INTRAC whether the loss of signal is due to the satellite
	or the IBR-L. Thus when the displayed beacon level falls
	below normal the user should check the signal by some other
	means before assuming an IBR-L problem. The beacon
	should be checked with a spectrum analyser on a narrow
	sweep range so that the actual beacon frequency can be
	seen and measured.
	Although the loss of or reduction in displayed beacon level
	could be caused by a fault on the Interface PCB the most
	likely cause is a faulty IBR-L.

Page 82 INTRAC-305 MANUAL - Issue 3.2 © 2011 Advantech Wireless