The HKDV900 Digital Video Controller from Sony is a special controller designed for use with HDW-F500/500/2000 HD digital VTRs. This unit controls the VTR's HD/SD output video signals and its built-in down-converter image enhancer. This controller can also be used as a remote controller for the HKPF-9000 multi-format converter, the HKPF-1125A 525/625 to HD up-converter, and the 525A/AV NTSC down-converter board installed in PFV-HD Series Interface Units. It can be connected to a maximum of (4) devices, but only one device can be controlled at a time. This unit is rackmountable. Control for HDW-F500/500/2000 HD digital VTRs This unit controls HDW-F500/500/2000 HD digital VTRs' HD/SD output video signals and its built-in down-converter image enhancer. Remote Control This controller can also be used as a remote controller for the HKPF-9000 multi-format converter, the HKPF-1125A 525/625 to HD up-converter, and the 525A/AV NTSC down-converter board installed in PFV-HD Series Interface Units. Rack Ready This unit is rackmountable.