BM-500GE / BB-500GE
23
Analog Signal [mV]
Black Level
1023
890
32
0
25
700
D
ig
it
al
Ou
t
[L
SB
]
White Clip Level
100% Level
800
7.3. Partial Scanning ( Fixed rate and variable)
The partial scanning function uses the middle of the image vertically to achieve faster frame
rate. This is effective for capturing and inspecting the image which does not require the
height. BM-500GE/BB-500GE has 4 types of partial scan modes such as 2/3, 1/2, 1/4 an 1/8.
In addition to the mentioned fixed rate partial scan modes, BM/BB-500GE has variable partial
scan mode. The start line can be set from 2
nd
line to 2050
th
line and the scanned lines can be
set from 8 lines to 2058 lines. Please note that if the odd line is selected as the start line,
the Bayer color sequence is RGR and if the even line is selected , it is GBG.
7.4. GigE Vision Streaming Protocol (GVSP)
7.4.1 Digital Video Output (Bit Allocation)
Although the BM-500GE and BB-500GE are digital cameras, the image is generated by an
analog component, the CCD sensor.
The table and diagram below show the relationship between the analog CCD output level and
the digital output.
CCD out
Analog Signal *
Digital Out
8 bit
10 bit
12 bit
Black
Setup 3.6%, 25mV
8 LSB
32 LSB
128 LSB
200mV
700mV
222 LSB
890 LSB
3560 LSB
230mV
800mV
255 LSB
1023 LSB
4095 LSB
The standard setting for 10-bit video level is 890 LSB. 200 mV CCD output level equals 100%
video output.
Fig. 17. Digital Output
Mode
Start line
End line
Frame Rate
Fast Dump
Fast Dump
Normal Scan
2/3
1/2
1/4
1/8
343
515
773
901
1716
1544
1286
1158
19.97 fps
23.93 fps
34.04 fps
43.07 fps
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