I picked up an HG3 today, and updated it to work with my SDP2, but on all 3 calls I tried to use it on this afternoon, The HG3 lost the signal before I got to the outdoor unit.
All 3 homes have the indoor unit in the attic, and the outdoor unit on the ground outside, <60' away.

Is there any trick to keeping them connected?

Will the wireless transmitters work as a repeater for the SDP2?

Is there some way to set them up so that the HG3 will automatically reacquire the signal if I come back in range of the SPD2?
In one of the houses, the outdoor unit was within 30 feet of the indoor unit, but the path out of the attic, and out through the house, took me out of range.

These were not even large homes, all 3 were under 2000 sq ft.