C7942CA-22 データシートの表示（PDF） - Hamamatsu Photonics

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C7942CA-22

Flat panel sensor

Hamamatsu Photonics 

Flat panel sensor

C7942CA-22

Timing chart

Internal trigger mode

To acquire images through a frame grabber board, write parameters in the software program or parameter file by referring to the

following timing chart and description.

Vsync+ (grabber)

Hsync+ (grabber)

1st row

2nd row

1 frame (Tvc)

He

Last row

Dummy lines

Tvdpw

Enlarged view

1st row

2nd row

All pulses are counted in the

“High” period of Hsync+.

Vsync+ (grabber)

Hsync+ (grabber)

Phe

Pclk+ (grabber)

1st row

2nd row

Pg Phe Phd Phe Phd

All pulses are counted at the riging edge of Pclk+.

The effective video output is only included in the “Phe” period.

KACCC0362EC

Parameter

He

Effective line

Dummy line

Phe

Effective pixel

Dummy pixel

Phd

Pg

Note: “He” is the Hsync count. Phe, Phd and Pg are the Pclk count.

Single operation

(1 × 1)

2344

56

2240

160

526

21

Count

2×2

binning

1172

28

1120

80

1726

21

4×4

binning

586

14

560

40

2326

21

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 obtained.

When used in synchronization with a pulsed X-ray source, X-rays should be irradiated during the Txray period.

40-pin receptacle

Mode

Pin No. 17

Pin No. 37

(ExtTrgGrb)

(IntExt)

Internal trigger

mode

-

(Input signal is

ignored.)

Low

Rectangular signal

External trigger (See the right figure.)

mode

High or Open

High

2-pin receptacle

Pin No. 1

(ExtTrgLemo)

-

(Input signal is

ignored.)

High or Open

Rectangular signal

(See the right figure.)

Frame time (Tvc to Tmax)

Recommendation: 50 % of frame time

ExtTrgLemo

ExtTrgGrb

(TTL)

Tvd

Tvc - Tvdpw

Txray

Vsync+

Tvl

(RS-422)

Hsync+, Pclk+ and effective video output 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)

· Tvl = Frame time - (Tvc - Tvdpw)

KACCC0341ED

Parameter

Delay time (only external trigger mode)

Vsync Cycle time (internal trigger mode)

Pulse width of Vsync+ in low period (internal trigger mode)

Note: The numbers of significant figures is two. (except Tvc)

Symbol

Tvd

Tvc

Tvdpw

Single

operation

390

470

770

2×2

binning

390

230

770

4×4

binning

390

117

770

(Typ.)

Unit

μs

ms

μs

3

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