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Spyder3 GigE Vision SG-14 Monochrome Cameras User’s Manual
03-032-20123-01
Teledyne DALSA
Exposure Modes in Detail
Mode A. Internally Programmable Line Rate and Exposure Time (Factory Setting): ExposureMode Timed and
LineTriggerMode Off (Internal)
Op erates at a m axim u m line rate and exp osu re tim e.
When setting the line rate (u sing the
AcquisitionLineRateAbs
com m an d ), exp osu re tim e w ill be red u ced , if
necessary, to accom m od ate the new line rate. The exp osu re tim e w ill alw ays be set to the m axim u m tim e (line
p eriod – line tran sfer tim e – p ixel reset tim e) for that line rate w hen a new line rate requ iring red u ced exp osu re
tim e is entered .
When setting the exp osu re tim e (u sing the
ExposureTimeAbs
com m and ), line tim e w ill be increased , if
necessary, to accom m od ate the exp osu re tim e. Und er this cond ition, the line tim e w ill equ al the exp osu re tim e
+ line transfer tim e.
Example 1: Exposure Time less than Line Period
Mode B. External Trigger with Maximum Exposure: ExposureMode Off and LineTriggerMode On (External)
Line rate is set by the p eriod of the external trigger p u lses. The falling ed ge of the external trigger m arks the
beginning of the exp osu re.
Example 2: Line Rate is set by External Trigger Pulses.
Mode C. Smart EXSYNC, External Line Rate and Exposure Time: ExposureMode TriggerWidth and LineTriggerMode On
(External)
In this m od e, EXSYN C sets both the line p eriod an d the exp osu re tim e. The rising ed ge of EXSYN C m arks the
beginning of the exp osu re an d the falling ed ge initiates read ou t.
Example 3: Trigger Period is Repetitive and Greater than Read Out Time.
Programmable Period (
command)
ExposureTimeAbs
Line Period
Readout
CR
Exposure Time
CR=Charge Reset
Line Period
Programmable Period
CR
Exposure Time
Programmable Period (
command)
AquisitionLineRateAbs
Readout
Programmable Period
Waiting
Waiting
Line Period
Exposure Time
Line Period
Readout
Exposure Time
Falling Edge
Ignored During
Readout
Readout
Falling Edge
Ignored During
Readout
EXSYNC
Readout
EXSYNC
EXSYNC falling
edge ignored
during readout
Line Period
CR=Charge Reset
Readout
Line Period
EXSYNC falling
edge ignored
during readout
Waiting
Exposure Time
CR
Waiting
CR
Exposure Time
