When an interactive job is started, the job CCSID value is taken from the user profile. When a batch job is started, the current job CCSID is used unless a CCSID is specifically entered on the SBMJOB command.
For every mixed-byte coded character set CCSID, there is a corresponding SBCS CCSID that is valid. If you specify a mixed-byte coded character set CCSID for an SBCS system, the job CCSID is changed to the corresponding SBCS CCSID.
If a job CCSID is specified as an SBCS CCSID, the job cannot handle DBCS data. If a job CCSID is specified as a mixed CCSID, the job can handle DBCS data. You must use a DBCS-capable display device, though, for the DBCS data in a job to display correctly. You can specify a mixed-byte CCSID for a job only if the DBCS system value (QIGC) value is set to 1 (on). A QIGC value of 1 indicates that a DBCS national language version is installed on the system.