JAI CV-M91 operation manual Start Stop Mode, Start stop interlaced field integration

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CV-M91

6.2.4. 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 1/77 to 1/10,000. 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 and 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 field accumulation needs only 1 trigger pulse for each field. Refer to “7. Configuring the Camera.”

To use this mode:

 

Set function:

Trigger mode to “Start Stop”. SW 1-4 to OFF

 

On PK8407: JP301 short, JP302 open, JP311 short.

 

Accumulation to “Field” or “Frame”. SW 301-4 to OFF or ON

 

Scanning to “Non-interlaced” or “Interlaced”. SW 1-5 to ON or OFF

 

Shutter Speed to “1/10,000 ”. SW 1-1 through 1-3 to ON

 

Other functions

Input:

Ext. trigger to pin 5 on 6-pin connector.

 

Ext. VD to pin 7 on 12-pin connector

 

(Ext. HD to pin 6 on 12-pin connector). Option

Important notes on using this mode.

External sync system should follow the camera scanning system

Requirements to HD/VD phase is shown in fig. 10

Fig. 23. Start stop interlaced field integration

Fig. 24. Start stop interlaced frame integration

Fig. 25. Start stop non-interlaced field integration

e x t . T r i g

1 3 H

e x t . H D

e x t . V D

A c c u m

c o m p o s it e

v id e o

a c c u m u la t io n

s t o p s h e r e

M in . a c c u m .

Fig. 26. Vertical timing details for start stop

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Contents CV-M91 Table of Contents CV-M91General Main FeaturesStandard Composition Locations and Functions LocationsPin Multi-connector DC-IN/Trigger Pin Multi-connector Trigger and RS232CPin no Signal Remarks Pin AssignmentPin Sub D-connector Video Input and Output CircuitsPin no Video outputsPrism unit HD, VD, WEN, EEN and Pclk outputFunctions and Operations Input/Output of SignalsInput/output of HD/VD Internal sync out/WEN out Internal pixel clock outVBS out on pin#4 12 pin Out/VBS out on pin#6 9 pin sub-DTrigger Modes Long time integrationContinuous Operation Non triggered PAL horizontal timingVertical timing PAL interlaced Vertical timing Ntsc interlaced Edge Pre-select Mode Vertical timing for edge pre-select PALPulse Width Control Mode Vertical timing for pulse width control PALStart Stop Mode Start stop interlaced field integrationLong time integration Long time interlaced field integrationOther Functions Configuring the Camera Switch settingsSwitch settings inside 1. SW1 on rear panelJumper settings inside ShortSwitch and jumper positions Board positionsCV-M91command list RS-232C controlCamera Control Tool for CV-M91 Window from camera control toolSpecifications External Appearance and DimensionsSpectral sensitivity Specification table CV-M91PCV-M91 Opto-mechanical specifications Opto mechanical specificationsTypical CCD Characteristics PrecautionsAppendix Users Record Users Mode Settings Users ModificationsCamera type CV-M91 Revision Revision a Serial No ……………