Sony DFW-X700, DFW-SX900 Example of Acceptable Trigger Interval, Camera Exposure Time

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DFW-SX900

DFW-X700

FUNCTIONS

The trigger acceptance prohibition period continues until all of CCD image has been transferred out of the camera.

When the transfer frame rate is reduced (3.75 fps of DFW-SX900, 7.5 fps of DFW-X700), data will continue to be transferred even after readout of image has been completed as shown in the figure below. The trigger prohibition period continues until data transfer ends.

All trigger inputs to the camera during the “Trigger Acceptance Prohibition Period” will be ignored.

The following equation is one method of roughly calculating the acceptable trigger interval.

Trigger interval = Exposure time + Frame rate

	Camera	Exposure Time

		1/1,000s	1/100s
		1/1,000s	1/100s

	DFW-SX900 (When set to 7.5 fps)	Approx. 134 ms	Approx. 143 ms

	DFW-X700 (When set to 15 fps)	Approx. 68 ms	Approx. 77 ms

Example of Acceptable Trigger Interval

TRIGGER

SUB

VD

Inside Camera

SG

CCD OUT

Isochronous

Front Panel LED

Trigger Acceptance Prohibition Period

Exposure A

Time

B

Green

Orange

Green

External Trigger Shutter Operations When Frame Rate is Reduced

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Contents Technical Manual Table of Contents Main Features OutlineSystem Components Specifications Connection Names and Functions of Parts Pin assignment of Trig in connector femalePin assignment of camera connector Dimensions CCD Pixel Location Top ViewSpectral Characteristics Typical Values Functions Camera FunctionsGain ShutterAuto Exposure BrightnessColor Temperature GammaSharpness White BalanceSaturation Isochronous Start/StopOne Shot TriggerOperations in Normal Mode When exposure time is 1 frame or shorterOperations in Normal Mode Time until Data is Read Out and Output Period of DataWhen exposure time is over 1 frame Operations When Frame Rate is ReducedInside Camera SUB Isochronous Front Panel LED External Trigger Shutter Inputting trigger and pulse conditionsExternal Trigger Shutter Operations Example of Acceptable Trigger Interval Camera Exposure TimePartial Scan Mode Cutting sizeCSR F0F00000h Camera Initialize Register Write Only CSR F0F00600h Current Frame RateCSR F0F00604h Current Video Mode CSR F0F00608h Current Video FormatCSR F0F0060Ch CSR F0F00614h Isochronous Transmission Start/StopCSR F0F00618h Memory Save CSR F0F0061Ch One ShotCSR F0F00620h Memory Save Channel CSR F0F00624h Current Memory ChannelCSR F0F00808h Sharpness CSR F0F00800h BrightnessCSR F0F00804h Auto Exposure CSR F0F0080Ch White Balance One-Push Auto White BalanceCSR F0F00818h Gamma CSR F0F00810h HueCSR F0F00814h Saturation Shutter OFF CSR F0F0081Ch ShutterAuto exposure CCD Iris CSR F0F00820h Gain CSR F0F00830h TriggerCSR F0F0088Ch Optical Filter Auto Gain ControlFor Format7 CSR F1000108h Image PositionWhen DFW-SX900 When DFW-X700CSR F100000Ch Image Size Minimum Unit for DFW-SX900 Minimum Unit for DFW-X700CSR F1000110h Color Coding ID CSR F1000144h Byte per PacketGeneral precautions for partial scan function Command Sending Procedure Until Images are Displayed Acquiring the camera control register base addressAcquiring the format/mode/frame rate Check available formatsCheck available video modes Check available frame rates Example Format0 Mode3Video transmission start command To set the trigger modeProcedure for Format7 Aquire the available mode for Format7Acquire the CSR offset address of Mode0 Acquire the MaxSize/UnitSize/ColorCodingIDVideo transmission start command Format7 Specify the packet sizeCommand Setting and Operation Timing Trigger Mode command and actual operation timing One Shot CMD and actual operation timingCamera IEEE1394 Cable SupplementsList of Camera Functions Host Adapter Card DFWA-400 FeaturesRecommended Specifications for Personal Computer PC Specifications Installing the Host Adapter Card Precautions on software provided Setup of the DriverPrecautions Setting up the driver Setting up the demonstration softwareFor Windows For Windows NT4.0Page DFW-SX900