Scan Engine; Labels; Table 9. Barcode Label Types - Sun Microsystems SL8500 Best Practices Manual

SL8500 Architecture
■

Scan Engine

The SL8500 library utilizes a "line scan" camera technology for reading barcode
labels which differs from the PowderHorn "area scan" camera technology.
The scan engine uses a charge couple device (CCD) with an LED light source
that is integrated into the cartridge gripping mechanism of the HandBot. These
LEDs project a thin strip of light onto the barcode of the label. The white portions
of the barcode reflect back an image to a lens that collects and focuses the
pattern on to a multi-pixel CCD-imager.
The CCD-imager uses a technology similar to that of digital cameras except this
imager uses a single row of sensors where digital camera use multiple rows. In
essence, the CCD imager provides a very narrow picture that cuts across the
bars in the barcode creating a digitized signal.
Because the SL8500 scan engine uses a light source that illuminates the label,
anything that causes a reflection back into the lens could blind the CCD imager
and cause barcode read problems. That is why the scan engine is mounted at
an angle to the labels and targets to avoid any problems with reflection.
Line scan cameras provide a much higher pixel resolution with very robust
barcode decoding algorithms which may be more sensitive to label orientation
and placement on a cartridge.
Caution:
The SL8500 is able to scan upside-down LTO
them into cells. However, mounts of these upside-down cartridges will fail.
Currently, the library returns these cartridges back to the cell and does not
eject them through the CAP.
1.LTO = Linear Tape-Open
2.SDLT = Super Digital Linear Tape (DLT)
■

Labels

The SL8500 library supports four types of barcode labels:

Table 9. Barcode Label Types

9x40
T10000
LTO
SDLT
32 SL8500: Best Practices • March 2007
Uses a six-plus-one label supplied by Engineered Data Products/
Colorflex) and American Eagle/Writeline. The plus-one is the required
media ID character with an implied domain type of 0.
Uses labels with eight characters, the last two of which are the required
Media ID Domain and the Media ID Type characters.
Uses labels with eight characters, the last two of which are the required
Media ID Domain and the Media ID Type characters.
Uses labels with seven characters, the last of which is the required
media ID character with an implied domain type of 1.
1 2
or SDLT cartridges and insert
Revision B • TM0017