JAI CV-A11 operation manual Edge Pre-select Mode, Important notes on using this mode

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CV-A11

6.5. Edge Pre-select Mode

An external trigger pulse initiates the capture (input on pin 11 of the 12-pin Hirose connector or pin 5 of the 6-pin Hirose). The leading edge of the trigger pulse initiates the exposure (this is a falling edge if factory default). If the polarity of this pulse is reversed, the camera can be configured to correct for it. The exposure time (accumulation time) is governed by the pre- defined shutter speed set by RS-232C.

To use this mode:

 

 

Set function:

Trigger mode “Edge Pre-select”

TR=1

 

Shutter mode to “Normal” or “Programmable”

SM=0, SM=1

 

Shutter Speed using fixed steps

SH=0 through 7

 

or Programmable exposure

PE=1 through 1023

 

Polarity and other functions

 

Input:

Ext. trigger to pin 5 on 6 pin connector (or 11 on 12 pin connector)

 

Ext. HD to pin 6 on 12 pin connector. (If used).

 

Fig. 17. Edge pre-select

Important notes on using this mode:-

•As the start of exposure will be synchronized with the internal H signal, the start of exposure may be shifted by max 1H. To avoid this shift (jitter), synchronize the camera with an external HD and make sure that the trigger pulse aligns to the HD signal as shown in Fig. 14.

•The duration of the external trigger pulse must be greater than 1H. It is recommended to make this longer, typically 9H. This is a TTL level pulse, which can be positive or negative going (the camera can be set to accept any polarity).

•Do not input ext. VD signal at pin 7 on 12 pin connector, as it may disturb the external trigger function.

•Do not input a new trigger before the previous video is read out. (WEN is high).

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Contents CV-A11 Table of Contents CV-A11General Main FeaturesStandard Composition Camera Housing and Dimensions Pin Multi-connector Trigger and RS232C Pin Multi-connector DC-IN/VIDEO OUT, EXT.HD/VDPin Assignment Trigger input Input and Output CircuitsVideo output HD and VD inputFunctions and Operations Basic functionsInput-output of HD/VD Signals Continuous Operation Non triggeredExternal Trigger Modes Edge Pre-select Mode.TR=1Edge Pre-select Mode Important notes on using this modePulse Width Control Mode Pulse width controlFrame-delay read out Mode Frame delay read outLong Time Exposure Mode Long time exposureStart/Stop Mode Start/stop modeSmearless Mode Smearless modePartial scan readout mode Readout format Frame rate Effective linesOther Functions Configuring the Camera RS-232C controlCV-A11 RS-232C command list Useful commandsCamera Control Tool for CV-A11 Selecting termination of HD/VD input signals Internal Switch and Jumper Settings1. HD/VD input-output selection Specifications Spectral SensitivityAppendix WEN out on pin 6 on 6 pin connectorCV-A11 emulating CV-M10 interfacing Precautions Typical CCD CharacteristicsUsers Record Camera type CV-A11 Revision Revision a Serial No ……………
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