Space motion sensors by 2 to allow for dark/light codes

When a button on the Palm Pad is pressed, it transmits an RF signal
(at 310MHz, if you were wondering).  The Transceiver detects the RF
signal and extracts the information (the House/Unit code and command).
Next, the Transceiver encodes the House/Unit code and command into the
proper X10 powerline carrier format and transmits it on your house wiring.

XCam2 cameras are designed to be used in groups of 4. The groups of 4
are 1-4, 5-8, 9-12, or 13-16. The Addressable Power Supplies are designed
such that if their code is received they turn on, but if any other code
(in their group of 4) is received, they turn off. This ensures that only
one camera is ever on at the same time. Any code outside their group of
4 is ignored. So if you turn on camera 1, cameras 2, 3, and 4 turn off.
If you turn on camera 2, cameras 1, 3 and 4 turn off, etc. Note: The
Transceiver's Unit code is 1, so if you turn it on, it's just like
turning camera 1 on; therefore, cameras 2, 3, and 4 will turn off. If
you turned on camera 1, 2, 3, or 4 and also had a camera set to 5 it
would not turn off, as it's not part of the group of 4. You would need
to turn it off separately so that you didn't have two cameras on at the
same time (which would scramble the signal sent to the Video Receiver).