This is the specially made adapter cable intended to be used for connecting a 15Khz RGB signal to our RGB converter AV-1 model with standard VGA output to LCD flat panel display. We suggest you to order this adapter cable along with our RGB converter together to avoid the the connection problem or you may customize one yourself based upon our specification. The typical legacy DB9 to HD15 monitor adapters provided from other vendors have different pin-out assignments than ours and they shall be used for connecting with IBM PS2 or NEC Multi-Sync monitors only. If you pick up one of those monitor adapters for input to our converter, the converter will not process your RGB signals correctly.