CDK-111A-Lite Owner's Guide - Ross Video

Crosspoint Command (41-44, C1-C4)The editor uses the read form of the crosspoint command to determine which inputcrosspoint is selected on the key bus. The response from the switcher will be in theform of a write command, with the message data containing the input number.The write command allows the editor to select and input.NoteThe CDK-111A-Lite keyer will treat commands 43/44 asidentical and C3/C4 as identical to ensure compatibility withmost editors.Crosspoint Command (41-44, C1-C4)Function Byte Count EffectsAddressREAD:CommandCodePGM Bus 02 01 41 NoneKEY Bus 1 Fill 02 01 43 NoneKEY Bus 2 Fill 02 01 44 NoneWRITE:MessagePGM Bus 03 01 C1 Input NumberKEY Bus 1 Fill 03 01 C3 Input NumberKEY Bus 2 Fill 03 01 C4 Input NumberThe internal design of the CDK-111A-Lite allows any external or internallygenerated input to be routed to any bus. The message byte therefore can take on anyof the following:Input Number(hex)Message BytesMeaning00 Internal Black01 Video In A03 Video In Key Fill04 Video In Key Alpha05 Internal Matte4-12 • Appendix A. Serial Protocols CDK-111A-Lite • Owner’s Guide v4B