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The approximate maximum frame rate depending on the change of Vertical ROI can be obtained as shown in the
following expression.
1 or 2 Channel Mode:
Frame Rate (fps) = 1000000 / [T
T
: the amount of time required to transmit electric charges accumulated on
VCCD
the pixels to Vertical Register
T
: the amount of time required for 1 row flush
RF
V
: the number of Vertical Line of CCD
SIZE
T
: the amount of time required for transmission of one line
L
V
: size of the Vertical ROI
ROI
The available minimum value of T
The value of T
may vary depending on the Sensor Digitization Taps and Pclk Selector parameter settings.
L
The values of each item are shown below.
VA GigE Series
VA-1MG
T
VCCD
T
(1 channel)
L
13.2 ㎲
T
(2 channel)
L
T
T
RF
V
1064 Lines
SIZE
Minimum
Vertical ROI
120 Lines
Size
† Based on Pixel Clock 50 ㎒ (PclkSelector: PCLK1 for VA-1/2/4/8MG)
‡ Based on Pixel Clock 40 ㎒ (PclkSelector: PCLK1 for VA-29MG)
VCCD
, T
, V
VCCD
RF
SIZE
†
†
VA-2MG
12 ㎲
12 ㎲
24 ㎲
36 ㎲
19.2 ㎲
* 0.28
T
* 0.28
L
L
1264 Lines
150 Lines
Table 9.2 Timing Value for VA GigE Series
48 of 94
+ T
× {V
– (V
RF
SIZE
ROI
, T
and V
may vary depending on the camera model.
L
ROI
†
VA-2M(HD)
VA-4MG
12 ㎲
15.0 ㎲
42.4 ㎲
52.3 ㎲
22.4 ㎲
28.3 ㎲
4.0 ㎲
T
* 0.28
L
1144 Lines
1800 Lines
120 Lines
200 Lines
VA GigE series
+ 12)} + (V
+ 12) × T
ROI
†
†
VA-8MG
VA-29MG
15.0 ㎲
71.5 ㎲
182.4 ㎲
37.9 ㎲
99.3 ㎲
4.0 ㎲
16.0 ㎲
2520 Lines
4452 Lines
300 Lines
500 Lines
]
L
‡
51 ㎲
RA14-131-003
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