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4. Camera mode
18
4.2.3.
Partial scan mode
This mode increases the frame rate by dividing the
whole video period vertically, reading only the
necessary lines as the actual video, and transferring
unnecessary lines at high-speed. Set the read beginning
position (block number PSAH for high-speed
transferring) and read block number (normal
transferring block number or line number PSAF).
There are five types of partial scan mode.
In Modes 1 to 4 divide the actual video vertically into
any of approximately 16 or approximately 32 areas and
then reads them as the actual video. Mode 5 improves
the flexibility of area selection and allows for much
more detailed area settings to be configured.
Line number of actual video
For each of Mode 1 and Mode 3, Mode 2 and Mode 4,
the division numbers of approximately 16 and
approximately 32 are the same, but the beginning
positions of the actual video are different. Mode 1 and
Mode 2 are the same as the division settings on the XCL-
5000, but they cannot be selected on the XCL-5005CR.
Mode 3 and Mode 4 have common settings for the XCL-
5005 and XCL-5005CR. Mode 5 allows for detailed
setting of the actual video lines.
Partial scan offset
You can use partial scan offset (PARTIAL-OFFSET) to
offset the beginning position of the actual video output
in the normal transferring period in increments of 1 line.
To make the beginning position of the actual video
output the same as any that of any mode other than
partial scan, set PARTIAL-OFFSET=0.
To use Mode 1 of XCL-5005 with the same setting as
XCL-5000, set PARTIAL-OFFSET=38. The setting is
PARTIAL-OFFSET=38 at the time of shipment.
The setting range available for PARTIAL-OFFSET may
be different depending on the mode.
Beginning and ending position of the actual
video
In Modes 1 to 4, when the ending position of the actual
video is set by selecting a certain area and then a
different setting is configured so that the corresponding
point becomes the beginning point, both points may not
match. This is because the high-speed transferring
period cannot be partitioned in increments of 64 lines.
You can, however, make both points match if you use a
partial scan offset.
Mode
XCL-5005
XCL-5005CR
PSAF
Line number of actual video
1
a
–
0 - 15
128 × (PSAF+1)
2
a
–
0 - 31
64 × (PSAF+1)
3
a
a
0 - 15
128 × (PSAF+1)
4
a
a
0 - 31
64 × (PSAF+1)
5
a
a
1 - 2050
PSAF
High-speed transferring period
High-speed transferring period
High-speed transferring block number
(High-speed transferring period PSAH)
Modes 1 to 4 : Normal transferring block number
Mode 5
: Normal transferring line number
(Normal transferring period PSAF)
Whole
area
Normal transferring period
(Effective video output)
PARTIAL-
OFFSET
Mode
Setting range (fixed
value)
XCL-5000
–
1, 2
(38)
XCL-5005
a
1 to 4
Integer from 0 to 38
5
Integer from 0 to 51
XCL-
5005CR
a
1 to 4
Even value from 0 to 38
5
Even value from 0 to 50