6 INSTALLATION
Refer to C-View Installation and Operation
7 MODES OF OPERATION
7.1 NORMAL
MODE
In each mode description, the RS232 mode commands (LVDS version only) are shown.
Please refer to the RS232 details in Section 9.4.
NRR: Normal mode with reset
NOR: Normal without reset
In the normal mode of operation, the following signals are used to synchronize a digital frame
grabber to the camera:
Pixel Clock
: Periodic 20 MHz, square wave output which is synchronous with digitized pixel data.
Enable Frame
: Periodic 12Hz (frame rate) output; the rising edge signifies the start of a valid
frame and the falling edge signifies the end of a valid frame
Enable Line
: Periodic 12.53 KHz (line rate) output; the rising edge signifies the start of a valid
line and the falling edge signifies the end of a valid line.
The Horizontal and Vertical Drive signals are usually outputs generated by the camera.
In the timing diagram show below, charge transfer from the active (imaging) charge sites to
adjacent (opaque) storage sites takes place at the beginning of a frame. In this process, all the
charge that was accumulated in the imaging charge sites during the previous frame is transferred to
the opaque storage sites.
Charge transfer
Line count
1
2
3
4
5
6
7
....
....
....
....
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
1
2
3
4
5
6
7
....
Horizontal Drive
Vertical Drive
Enable Line
Enable Frame
Pixel Clock
V
I
D
E
O
V
I
CCD Output
BLK
BLK
BLK
1
2
....
....
....
....
1030 BLK
BLK
BLK
BLK
1
2
....
Exposure = 1/12 sec
Figure 7.1-1: Timing diagram--normal mode
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