C7942CK-12 Datasheet, PDF (3/6 Pages) Hamamatsu Corporation – Acquire digital X-ray image in real time and 170 mm diagonal size

Flat panel sensor C7942CK-12
s Timing chart
To acquire images through an image grabber board, write parameters in the software program or parameter file by referring to
the following timing chart and description.
Tvc (1 FRAME)
Tvdpw
Vsync+ (GRABBER)
Hsync+ (GRABBER)
1st ROW
2nd ROW
He
LAST ROW
DUMMY LINES
1st ROW
2nd ROW
All pulses are counted in the
“High” period of Hsync+
ENLARGED VIEW
Vsync+ (GRABBER)
Hsync+ (GRABBER)
Phe
1st ROW
2nd ROW
Pg Phe Phd Phe Phd
Pclk+ (GRABBER)
All pulses are counted at the riging edge of Pclk+.
The effective video output is only included in the “Phe” period.
KACCC0362EB
Parameter
1×1
He
Effective line
Dummy line
2344
56
Phe
Effective pixel
Dummy pixel
2240
160
Phd
526
Pg
21
Note: “He” is the Hsync count. Phe, Phd and Pg are the Pclk count.
Pulse
2×2
1172
28
1120
80
1726
21
4×4
586
14
560
40
2326
21
s External trigger mode
To acquire images in external trigger mode, input an external trigger pulse as shown below. When the time Tvd has passed after
the rising edge of the external trigger pulse, synchronous signals and video signals are output.
When used in synchronization with a pulsed X-ray source, X-rays should be irradiated during the Txray period.
FRAME TIME (Tvc to Tmax)
RECOMMENDATION: 50 % OF FRAME TIME
ExtTrgLemo
ExtTrgGrb
(TTL)
Tvd
Tvc - Tvdpw
Txray
Vsync+
(RS-422)
Hsync+, Pclk+ and Data 1-12 are the same as internal trigger mode.
· Tmax is defined as the reciprocal of the minimum value of Sf (ext).
· Txray = FRAME TIME - Tvd - (Tvc - Tvdpw)
KACCC0363EB
Parameter
Symbol
Delay time (only external trigger mode) Tvd
Vsync Cycle time (internal trigger mode)
Tvc
Dummy pulse width
Tvdpw
Note: The numbers of siginificant figures is two. (except Tvc)

1 × 1 mode
390
470
770
2 × 2 mode
390
230
770
4 × 4 mode
390
117
770
(Typ.)
Unit
µs
ms
µs
3