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

Bit776655Analog Control Command (45, C5)The editor uses the read form of this command to determine the current value of theanalog control identified in the command. The response from the keyer will be in theform of the write command, the message data (three bytes) containing the controlnumber being read (first byte) and the current value of this control (second and thirdbytes). The control number assigned to each analog control is listed in the table onthe next page.A write command from the editor updates the analog control to a new value. Thecontrol value setting is represented in the message by two bytes, forming a signed 16bit two’s complement number. Valid numbers range from –4096 to +4095 for bipolarcontrols and 0 to +4095 for unipolar controls. The format is as shown in the figuresbelow.MSB443322Bit1 01 0Bit7 6XX5XLSB4X3X2X1XBit0XDon't Care Bits8-bit Analog Value8-Bit Analog ValueMSBLSBBit7 611 105948372615Bit04Bit7 6 5 4 3 23 2 1 0 X X1XBit0XDon't Care Bits12-bit Analog Value12-Bit Analog Value*All analog values are scaled to 12-bit representation regardless of internal precision.CDK-111A-Lite • Owner’s Guide v4B Appendix A. Serial Protocols • 4-13