The ADVC G4 is more than just a compact and robust sync generator. While most competitive products have only six outputs and restrictions on SD and HD signals, the ADVC G4 has nine outputs that can be individually controlled in groups of three. So three outputs can be SD, the other six can be HD, or vice versa. The ADVC G4 also includes a 48 kHz wordclock as well as a reference input, which allows it to be used as an extender when more than nine outputs are needed, or when an extension from the main system is necessary.
ADVC G-Series: Multipurpose Digital Video Converters Datasheet