CM-140 GE / -RA/-UV / CB-140GE/-RA
- 33 -
Formula to calculate Data Transfer Rate
J=
｛
90+64+(E+18)*(G-2)
｝
*8*D/1000000
Where,
G=ROUNDUP{A*B*C/8/(E-36)}+2
The following table shows Bits per Pixel (Item C) which depends on the pixel format.
Pixel format
Bit
Mono8,BAYGR8
8
Mono10_Packed/Mono12_Packed
12
Mono10,Mono12,BayGR10,BAYGR12
16
Calculation example: CM-140GE Pixel type RGB8
Item
Unit
Symbol
Setting
Image Width
[pixels]
A
1392
Image Height
[pixels]
B
1040
Bits per Pixel
[bits]
C
8
Frame Rate
[fps]
D
31
Packet Size
[Bytes]
E
1500
Number of Packets (including Data Leader & Trailer
Packet)
[packets]
G
Data Transfer Rate
[Mbit/s]
J
G=ROUNDUP{(1392x1040x8/8/(1500-36))+2=989+2=991
J={90+64+(1500+18)x(991-2)}x8x31/1000000=372 Mbit/s
8.3.5 Simplified calculation (Approximate value)
A simple way to calculate the approximate data transfer rate is the following.
Transfer data = Image width (pixel) x Image Height (pixel) x depth per pixel(depending
on the pixel format) x frame rate / 1,000,000 (convert to mega bit)
In the case of the CM-140GE with the full image and MONO8 pixel format;
The data transfer rate = 1392 x 1040 x 8 x 31 / 1000000 = 359 Mbit/s
8.3.6 Note for 100BASE-TX connection
♦
In case of connecting on 100BASE-TX, the maximum packet size should be 1500 byte.
♦
In case of connecting on 100BASE-TX, the specifications such as frame rate, trigger interval
etc. described in this manual cannot be satisfied.
Pixel Type
Frame rate at Full Frame[fps]
MONO8, BAYRG8, BAYGB8
8.0
～
8.2
MONO10_PACKED
5.4
～
5.6
MONO10, BAYRG10, BAYGB10
4.0
～
4.2
♦
100BASE-T works in FULL DUPLEX. It does not work in HALF DUPLEX.
