Does the HR12A work with any modules? Are
all the modules on the same House Code? The
XM13A power supply part of the kit has one
thing that may make it do things you didn't
expect. The supply uses unit codes in groups
of 4. 1-4; 5-8; 9-12 and 13-16. Example. If
the camera is on A1 you send an A1 from the
HR12A it will turn ON the camera, but if you
have maybe a lamp on A2. Turning on A2 will
turn off any camera on A1 A3 or A4. As the
supplies are setup that way for one camera
in the group to turn on and the other three
turn off. Another test maybe try the cameras
supply in a different outlet or the RF
Tranceiver in a different outlet as a test.
Many homes are split phase and an X10 signal
can have trouble getting to the other phase
and all the circuits on that phase.