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

Error Status Command (71, 72)The editor uses the read command to determine the current status of the BKGD andKEY video input signals. The response from the keyer will be in the form of thewrite command, the message byte having the formats shown in the figure below thetable.NoteThe CDK-111A-Lite will treat bits 0 and 1 as interchangeablesince it only has one keyer.NoteThe write command is shown (see below) for explanationpurposes only. It is not intended to be sent by the editor to thekeyer.Function Byte Count EffectsAddressError Status Command (71, 72)CommandCodeREAD: 02 00 71 NoneMessageWRITE: 03 00 72 Error Status ByteBit7654321Bit0Don't Care Bits0 = BKGD 1 signal Good1 = BKGD 1 signal Error0 = Not Applicable1 = Not Applicable0 = Key Video signal Good1 = Key Video signal Error0 = Key Alpha signal Good1 = Key Alpha signal ErrorError Status Byte FormatCDK-111A-Lite • Owner’s Guide v4B Appendix A. Serial Protocols • 4-23