Here are two different knowledge base articles with two different approaches to your camera switching problem. Try them in the order shown.
http://kbase.x10.com/wiki/Troubleshooting_Camera_SwitchingTroubleshooting Camera Switching
Questions
I`m not able to switch between my cameras
The pictures from cameras are overlapping each other
When I try to switch cameras, both cameras stay on
Answer
In order to switch cameras, an X10 Transceiver Module (models TM751 or RR501) or equivalent (ActiveHome Pro USB Interface, security alarm console) is required. Make sure that the transceiver is plugged in and set on the same House Code (the letter dial on the front) as your cameras (the letter dial on the addressable power supply). See the multi-camera system instructions for additional instructions on the initial setup of multiple cameras and a Transceiver.
If you have a transceiver installed and working, the issue of not being able to switch cameras is most likely caused by poor communication on your house wiring. There are a number of possible causes. A couple of simple tests can help you determine the source of the problem.
Most houses are fed from a 220 volt service which is then split into two phases of 110 volts each in the circuit breaker panel (“breaker box”). The X10 signals, which are transmitted onto the house wiring on one phase, will normally travel across to the other phase through the breaker panel, pole transformer, etc. Try testing communication across your phases by turning on an electric oven or clothes dryer, because these 240 volt electronic items can assist with coupling the two 110 volt phases, which will allow X10 signals from one phase to cross over to the other. While the oven or dryer is on, try controlling your cameras. If you find you can control the cameras when the oven or dryer is on, but cannot when they are turned off, you are dealing with a phase issue.
To correct a phase problem, you can install a phase coupler (or phase bridge). They are available through an X10 dealer/installer listed on
www.x10pro.com.
A second test requires a surge protector. Plug the surge protector into an outlet, and remove anything that is connected to it. Plug one of the addressable power supplies and a Transceiver into it. Now try to turn the camera on/off with your Remote. The surge protector creates a short signal path, and can block noise that might be interfering with the X10 signals transmitted over your house wiring (from the Transceiver to the camera`s power supply). This will also help rule out malfunctioning equipment. The easiest way to determine if any particular device is causing interference is by unplugging it. If this fixes the problem, consult an X10 installer about plugging the offending appliance into an X10pro Noise Filter XPPF, available at
www.x10pro.com(navigate to it through "Lighting and Appliance Current Control Catalog," then "Couplers/Filters/Accessories").
http://kbase.x10.com/wiki/Alternate_Camera_Switching_ConfigurationAlternate Camera Switching Configuration
Questions
I keep having problems switching cameras; what can I do?
How can I figure out why my wireless cameras won`t switch?
Answer
If you have consistent problems switching between certain cameras, you can try having the cameras switch using radio frequency (RF) commands only, instead of X10 signals being sent over your house wiring. Follow the steps below to test this.
First, perform the advanced camera switching test. This test is designed to help confirm that your X10 Camera`s addressable power supplies are working properly.
Parts
What you need to perform this test:
A transceiver module (model TM751 or RR501)
A remote control set to the same house code as your cameras
Your wireless cameras
A power strip with room to plug in several camera power supplies at the same time
Performing the Test
Most surge protectors have multiple outlets; however, because of the size of the power supplies of each camera, they cover adjacent outlets if they are too close together. If your power strip is like this, you may only be able to plug in 2 or 3 power supplies at a time. In order to complete this test, the transceiver needs to be plugged in with all of the cameras you want to control.
With all camera power supplies and the transceiver plugged into the same surge protector, test that the cameras switch correctly using your remote.
If they do, then there is an issue with X10 communication over the house wiring.
New Camera Set-up
Since the camera commands are sent via Radio Frequency first (from a remote, motion sensor, etc.), you can isolate each camera on its own surge protector. Each one will also need its own transceiver module (TM751 or RR501), because you will need as many transceivers as you have cameras for this application. Plug the camera`s power supply and its transceiver module--configured to the same housecode--into its surge protector.
When you install the cameras this way, you have full control of them. This configuration isolates each camera from any electrical line noise on your house wiring and still allows it to respond to signals from your remote.
If you have the FloodCam, you will need to plug an RR501 in on each circuit breaker with a FloodCam on it. Do not use multiple TM751s with the FloodCam.
If you are using your cameras with ActiveHome Pro and the iWitness plug-in software, identify each camera as a Vanguard, since ActiveHome Pro communicates with other cameras over your house wiring. The interface can send commands to Vanguards via radio frequency, like a remote.