Zenith DTT900 Digital-To-Analog Converter For Remote Control

To use the Zenith remote control to turn on the TV, press the "Power TV" button and keep pressing. Then press "Ch. Up" or "Ch. Down" button on the right. Zenith will send "manufacturing code" to your TV. Once the TV turns on/off (do this little slowly), then you're set to use the same Zenith remote for both TV and the converter box.