Fujitsu M3096GX Instruction Manual page 108

Note:
Front>side subwindow or back>side subwindow is specified by subwindow
identifier.
M3096GX/M3093GX must use only front>side subwindow data.
M3093DG 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.
#1
Header
a. Header
Subwindow data (header) is shown in the following illustration.
7 6
Byte 0
5
6 (MSB)
7
(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:
f Status:
f Sense key: X©5π (ILLEGAL REQUEST)
b. Subwindow descriptor block
Subwindow data (window descriptor block) is shown in the following
illustration.
4 $ 76
Up to four subwindows
#2
Subwindow descriptor block
5 4
(Reserved)
Window descriptor block length
B©00001π (CHECK CONDITION)
3 2 1
#4
0
(LSB)