Start recording the time of day and day of the week and
duration. Keep a log to see if there is a pattern. You
may have a CBer with an illegal amplifier in the area.
Turn the sensitivity on the receivers down to the minimum
needed to make your system work. You do not need to control
it from down the block. Turn it to minimum. If it works
there, leave it there and track the interference. You
should contact URC after you have gathered more information.
When you have interference, you could try turning off
one circuit breaker at a time at your electrical panel
to make sure that the interference is not coming from
inside your home. If you or your neighbors have ionization
type air cleaners, they may put out random RF. Think of
Marconi and his spark gap transmitter. I have seen problems
with some older security system wireless receivers caused
by the spark type pilot light starters on some furnaces,
although this should be of short duration, only while
the furnace starts.