Installation Instructions for Channel Vision CVT 1STEREO Multi-Room Video Modulator

Quick Guide from the Manual

The Channel Vision CVT Modulator allows you to map audio/video sources to unused TV channels for multi-room distribution. The system merges additional inputs into your existing TV signal, making sources like security cameras, VCRs, or stereo systems available on every TV connected to your coax network.

Basic Installation

Follow these steps to set up your modulator:

• Power Off: Always ensure the unit is powered off before changing DIP switch settings.
• Channel Selection: Use the DIP switches on the back of the unit to set the desired frequency band (UHF or Cable).
• Connections: Connect your video sources to the inputs on the back of the CVT Modulator. Connect the RF output to one input of the supplied combiner, and your existing cable/antenna signal to the other.
• Network Integration: Connect the output of the combiner to your TV network and plug the modulator into a wall outlet.
• Channel Tuning: Turn on your TV. Press the SELECT button on the modulator to cycle through inputs (A, B, or C). Hold SELECT for two seconds until the light blinks to enter channel-change mode, then use the UP/DOWN buttons to select the desired channel.

System Design Considerations

For optimal performance in sophisticated home networks, consider the following:

• Signal Strength: Aim for 10dBmV at each television. Signals below 10dBmV may result in snowy pictures, while signals above 10dBmV may overdrive older TVs.
• Amplification: Use broadband amplifiers (5MHz to 1GHz) to compensate for signal loss over long cable runs.
• Filtering: Use low-pass filters to clean up frequencies and prevent interference from active channels.
• Termination: Cap all unused coax cable ports with 75-ohm terminators to prevent signal leakage.

Troubleshooting

If you encounter issues, try these common solutions:

• Snowy Picture: Verify the modulator and TV are set to the same channel band (UHF vs. Cable). Ensure the modulated channel is not blocked by the TV's auto-programming.
• Black Picture: Verify video source connections. Disconnect the modulator to isolate if the issue is with the source or the modulator.
• Interference/Wavy Lines: Check for beat frequencies or unbalanced signal. Adjust the attenuator on the back of the unit or use a tilt compensator.
• Overheating: Ensure the unit is installed in a well-ventilated area.

Specifications

The CVT series modulators feature a PLL synthesized oscillator, NTSC video support, and adjustable gain. Operating temperatures range from 0°C to 50°C. Power consumption is 8 Watts.