We have noticed this on a few occasions. When the mobile keys up the repeater fails to respond. Just does this for a few minutes or less.
We thought is was maybe a power failure at the tower site. We have the repeater on battery back up then transfers to standby generator.
So power failure is not the problem. Have been unable to get to of be at the repeater when this happens. It is just like its turned off.
The repeater is a ICOM FR-4000. I have had it in service for several months. This has happened maybe 6 times. Any ideas?