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CV-A50 IR

 

 

6.9. Start/Stop Mode 

The exposure time is controlled by the interval between the ext. trigger and the ext. VD signal. 
The exposure starts at the first HD pulse after the falling edge of the ext. trigger, and stops 14.5 
H after the falling edge of the VD pulse. It means that the trigger pulse must be applied after 
the external VD pulse, for exposures less than 14.5 H. The range can be between 1/60 to 
1/10,000 for EIA, and 1/50 to 1/10,000 for CCIR. The Start/Stop mode is a continuous mode 
where the VD signal must be given continuously. It is not possible to input external VD randomly. 

The difference between interlaced frame accumulation or field accumulation can be explained 
as follow. 
Both modes have 2 fields output in an interlaced frame. With frame accumulation, the contents 
in the ODD and EVEN sync fields will come from sensing field 1 and 2 on the CCD sensor. With 
field accumulation both ODD and EVEN sync fields will contain the signal from sensing field 1 and 
2 added together. 
Non-interlaced with field accumulation needs only 1 trigger pulse for each field.

 

 

To use this mode:  
Set function: 

Trigger mode to “Start/Stop”  

TR=5 

 

Accumulation to “Field” or “Frame” 

FR=0, F=1 

 Scanning 

to 

“Interlaced” 

SC=0 

 

 

Polarity and other functions 

Input: 

Ext. VD to pin 7 on 12 pin connector. 

 

Ext HD to pin 6 on 12 pin connector.

 

 

Fig. 25a. Start/stop mode. Interlaced with frame accumulation.

 

 

 

Fig. 25b. Start/stop mode. Interlaced with field accumulation. 

 

ext. H D

ext. V D

ext. Trig

1 3H

co m po site

vide o

Accum

M in . accum .

a ccu m u la tion

sto ps  h e re

 

Fig. 26. Start/Stop timing details.

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Summary of Contents for CV-A50 IR

Page 1: ...Industrial Monochrome CCD Camera CV A50 IR Operation Manual Revision 0 Manual Version 1 0 A50Manualnov25 doc JPT 25 11 03...

Page 2: ...Operations 6 6 1 Basic functions 6 6 2 Input output of HD VD Signals 7 6 3 Continuous Operation Non triggered 7 6 4 External Trigger Modes 11 6 5 Edge Pre select Mode 12 6 6 Pulse Width Control Mode...

Page 3: ...a Control Tool for CV A50IR CV A50 60 can be downloaded from www jai com 2 Standard Composition The standard camera composition consists of the camera main body and C mount protection cap 3 Main Featu...

Page 4: ...ometer for manual gain setting 5 Mounting holes 8 x M3 For precision mounting use only the 4 holes located at the forward part of the bottom plate 6 1 2 interline transfer type CCD sensor 7 Lens mount...

Page 5: ...from rear 1 2 3 4 5 6 Fig 3 6 pin connector Plugs for cable HR10A 7P 6S Notes Alternative signals can be placed on these pins by switch or jumper settings or RS 232C commands Refer to chapter 10 1 an...

Page 6: ...ND 5V 33k TTL 1k GND 100n 1k Trigger input 33k 100k 1n NC NC 5 6 JP4 11 12 100 100n 12v JP1 The trigger polarity can be changed Trigger input level 4 V 2 V The trigger input impedance is 1 k JP1 and J...

Page 7: ...ect 1 2 and 1 3 partial scanning It is not supported for the camera The accumulation FR can be field or frame Fig 9 shows details for frame and field accumulation with shutter OFF left and shutter on...

Page 8: ...unction SW 1 on PK8277 to IN for external VD HD input Factory default SW 2 on PK8277 to 75 for termination of VD HD SW 2 on PK8277 to TTL for TTL level for VD HD Factory defaults SW 1 on PK8277 to OUT...

Page 9: ...CV A50 IR Fig 10 Horizontal timing details and pixel numbering for the CCD array CCIR Fig 11 Horizontal timing details and pixel numbering for the CCD array EIA 8...

Page 10: ...CV A50 IR Fig 12 Vertical timing details for interlaced CCIR Fig 12A Vertical timing details for non interlaced CCIR 9...

Page 11: ...CV A50 IR Fig 13 Vertical timing details for interlaced EIA Fig 13A Vertical timing details for non interlaced EIA 10...

Page 12: ...reversed the camera can be configured to correct for it The duration of the external trigger pulse must be greater than 1H It is recommended to make this longer typically 9H Important notes on using t...

Page 13: ...0 Scanning to Non interlaced SC 1 Shutter mode to Normal or Programmable SM 0 SM 1 Shutter Speed SH 0 through 7 or Programmable exposure PE 1 through 1023 Polarity for trigger and other functions Inpu...

Page 14: ...range is 1 5H to 1000H shortest and longest pulse duration To use this mode Set function Trigger mode to Pulse Width Control TR 2 Accumulation to Field FR 0 Scanning to Non interlaced SC 1 Polarity a...

Page 15: ...EN polarity is user selectable To use this mode Set function Trigger mode to Frame delay read out TR 3 Accumulation to Field FR 0 Scanning to Non interlaced SC 1 Polarity and other functions Input Ext...

Page 16: ...for CCIR To use this mode Set function Trigger mode to Long time exposure TR 4 Accumulation to Field or Frame FR 0 F 1 Scanning to Interlaced SC 0 Shutter to OFF SH 0 Polarity and other functions Inp...

Page 17: ...plained as follow Both modes have 2 fields output in an interlaced frame With frame accumulation the contents in the ODD and EVEN sync fields will come from sensing field 1 and 2 on the CCD sensor Wit...

Page 18: ...range Normal 700 mVpp 30 mV The level can be adjusted with AG AGC level in the range 0 to 255 RP Rear Potentiometer In manual gain mode the gain level can be adjusted by the rear potentiometer or it c...

Page 19: ...Protocol Transmit setting to camera NN Parameter CR LF NN is any kind of command Capital or small letters To have all communication visible on the emulator screen start with EB 1 CR LF The camera ans...

Page 20: ...out Should be off when not used TP Trigger polarity TP Param CR LF 0 active low 1 active high 2 WP WEN polarity WP Param CR LF 0 active low 1 active high D Gain and analogue signals setting AS AGC Sw...

Page 21: ...8 Windows from Camera Tools For the integrator and experienced user the Camera Control Toll is much more than a program with a window interface It also provides an easy and efficient ActiveX interface...

Page 22: ...2 Selecting termination of HD VD input signals The default setting of the HD VD input is high impedance TTL The camera expects to get a signal that swings between 2 and 5 volts This setting allows th...

Page 23: ...ger input 4 Vpp 2 V 75 WEN output write enable 4 Vpp 2 V 75 EEN output exposure enable 4 Vpp 2 V 75 Pixel clock output 4 Vpp 2 V 75 Shutter off 1 100 1 250 1 500 1 1000 1 2000 1 4500 1 10 000 sec Puls...

Page 24: ...the cable configuration This application note gives detailed instruction on how to change the pin configuration by changing internal solder jumpers Please note Only a qualified electronics technician...

Page 25: ...is factory default setting Fig 32 PK8275B main board 10 3 CV A50 IR without sync on video output For applications where the video output signal should be without the composite sync signal it is possi...

Page 26: ...changes of jumper and switch setting 10 5 Typical CCD Characteristics The following effects may be observed on the video monitor screen They do not indicate any fault of the CCD camera but do associa...

Page 27: ...n this manual are trademarks or registered trademarks of their respective owners JAI A S cannot be held responsible for any technical or typographical errors and reserves the right to make changes to...

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