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A.4 Commands
Appendix A-71
Note:
Front-side subwindow or back-side subwindow is specified by subwindow identifier.
This scanner can use both front-side and back-side subwindow data.
If the scanner uses front-side and back-side subwindow at a time, those subwindow data must be set by
on SET SUBWINDOW command.
a. Header
Subwindow data (header) is shown in the following illustration.
(a) Subwindow descriptor block length: Bytes 6 and 7
Specifies the length in bytes of a subwindow descriptor block. Each block has a same length.
The allowable range of length is between 40 and 64 bytes. For a length outside this range,
this scanner returns the following error information:
• Status: B’00001’ (CHECK CONDITION)
• Sense key: X’5’ (ILLEGAL REQUEST)
b. Subwindow descriptor block
Subwindow data (window descriptor block) is shown in the following illustration.
Up to four subwindows
#2#1 #4
Subwindow descriptor block
Header
Byte 0
7
5
6
(Reserved)
7
6
5
4
3
2
1
0
Window descriptor block length
(MSB)
(LSB)