Icom IC-R8600 I/q Output Reference Guide - Page 9

I/Q SIGNAL ■■ Control commands DDCommand format (Continued) Reading command format: Send a request command from the PC to request to return an IC-R8600 setting value. A reading command is composed of only a command number. The IC-R8600 will return the requested setting value as an acknowledgement when receiving the command. If the request command is invalid, "NG (FA)" will be returned as the acknowledgement. ••Command (PC to IC-R8600) q w e r t i o Preamble FEF IC-R8600 address PC address Command Sub command Postamble Padding E9 6E0××××FDFF 1 byte (Variable) ••Acknowledgement to a valid command (IC-R8600 to PC) q e w r t y Preamble PC address IC-R8600 address Command Sub command FEFEE09 6 ×××× 1 byte (Variable) Data area Variable) ••Acknowledgement to an invalid command (IC-R8600 to PC) q e w u i Preamble PC IC-R8600 address address NG code Postamble FEFEE 0 9 6 F AFD i o Postamble Padding FDFF PC to IC-R8600 q w ert FE FE 96 E0 Cn Sc y Data area io FD FF OK message to PC q e w ui FE FE E0 96 FB FD End of message Postamble (fixed) (fixed) NG code OK code IC-R8600's address (fixed) PC's address (fixed) Preamble code (fixed) Preamble code (fixed) IC-R8600's address (fixed) PC's default address ("E0" in Acknowledgement) Command number (see the command table) Sub command number (may not necessary. See command table.) BCD code data for frequency or setting entry End of message Postamble (fixed) Padding (See the note below) (fixed) FE FE E0 96 Cn Sc q e wrt IC-R8600 to PC Data area y FD FF io FE FE E0 96 FA FD q e w ui NG message to PC NOTE: When the data length is an odd number Every command's total length in byte must be an even number. If the total length is an odd number, you need to add an extra "FF" at the end of the packet, to make the length an even number. In the same manner, the length of the acknowledgement data from the IC-R8600 is an even number. 8