__________________________________________ Installation 2-41
Parity
Parity is used to check for transmission errors by comparing the
group of data bits sent to the group received. A loss of data during
transmission usually results in a change to the group size. Your
printer supports five parity settings, None, Even, Odd, Mark, and
Space. The factory default is None.
Connecting an External SCSI Disk
You printer can support up to seven external SCSI disks and one
internal IDE disk. A hard disk allows you to download fonts to the
printer and to take advantage of the printer’s spooling feature. A 20
MB external SCSI disk can store approximately 500 to 600 fonts.
To connect an external SCSI disk to your printer, use a SCSI
peripheral cable (25-pin to 50-pin). If the disk is not internally
terminated, you also need an external SCSI terminator. See the SCSI
disk documentation for termination characteristics.
Connecting an External SCSI Disk to the Printer
SCSI disks are identified by device numbers such as the example in
figure 2.38. Each SCSI disk in a chain must have a unique number.
Usually, the disk number or ID is set using a switch on the back of
the SCSI disk.
Disk 1
Disk 2
Disk 3
Disk 4
Disk 5
Disk 6
Fig. 2.38 SCSI Disk Device Numbers
Caution:
Do not turn on the printer or any attached SCSI disk until
the disk has been assigned a number. See your SCSI disk
documentation for details on assigning this number.