Spyder 3 Camera User's Manual GigE Dual Line - Frame Grabbers
Spyder 3 Camera User's Manual GigE Dual Line - Frame Grabbers Spyder 3 Camera User's Manual GigE Dual Line - Frame Grabbers
60 Spyder 3 GigE User Manual Mode 6: External Line Rate and Internally Programmable Exposure Time Figure 21: EXSYNC controls Line Period with Internally controlled Exposure Time Line Period Line Period Programmable Period Using set Command Readou t Programmable Period Using set command Readou t EXSYNC CR=Charge Reset Mode 7: Internally Programmable Line Rate, Maximum Exposure Time In this mode, the line rate is set internally with a maximum exposure time. Figure 22: Mode 7 Camera Timing Line Period Line Period Exposure Time Exposure Time Internal Sync set with ssf Command Readout EXSYNC Falling Edge ignored during readout Readout EXSYNC Falling Edge ignored during readout Mode 8: Maximum Line Rate, Programmable Exposure Time In this mode, the exposure time is set internally with a maximum line rate. Figure 23: Mode 8 Timing Programmable Period Programmable Period Readout CR Exposure Time Readout CR Exposure Time Frame Period Frame Period CR=Charge Reset 03-032-10158-06 DALSA
Spyder 3 GigE User’s Manual 61 Setting the Readout Mode See also, Appendix C: Clearing Dark Current for more information on this mode. Purpose: Syntax: Syntax Elements: Use this command to clear out dark current charge in the vertical transfer gates immediately before the sensor is read out. srm i 0: Auto. Clears dark current below ~ 45% of the maximum line rate. 1: Dark current clear. Always clears dark. Reduces the maximum line rate. 2: Immediate readout. Does not clear dark current. (Default mode.) Notes: • The vertical transfer gates collect dark current during the line period. This collected current is added to the pixel charge. The middle two red taps have more vertical transfer gates and, therefore, more charge. This additional charge is especially noticeable at slower line rates. • If the user is in sem 2 or 7 and srm 2, with ssf at 45% of the maximum, and then srm 1 is selected, the following warning will be displayed, but the ssf value will not be changed: Warning 09: Internal line rate inconsistent with readout time> The effect in both internal and external line rate modes is that an EXSYNC is skipped and, therefore, the output will be at least twice as bright. • This value is saved with the camera settings. • This value may be viewed using either the gcp command or the get srm command. Related Commands: sem, ssf Example: srm 0 DALSA 03-032-10158-06
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<strong>Spyder</strong> 3 <strong>GigE</strong> User’s <strong>Manual</strong><br />
61<br />
Setting the Readout Mode<br />
See also, Appendix C: Clearing Dark Current for more information on this mode.<br />
Purpose:<br />
Syntax:<br />
Syntax Elements:<br />
Use this command to clear out dark current charge in the vertical<br />
transfer gates immediately before the sensor is read out.<br />
srm<br />
i<br />
0: Auto. Clears dark current below ~ 45% of the maximum line<br />
rate.<br />
1: Dark current clear. Always clears dark. Reduces the<br />
maximum line rate.<br />
2: Immediate readout. Does not clear dark current. (Default<br />
mode.)<br />
Notes: • The vertical transfer gates collect dark current during the line<br />
period. This collected current is added to the pixel charge. The<br />
middle two red taps have more vertical transfer gates and,<br />
therefore, more charge. This additional charge is especially<br />
noticeable at slower line rates.<br />
• If the user is in sem 2 or 7 and srm 2, with ssf at 45% of the<br />
maximum, and then srm 1 is selected, the following warning<br />
will be displayed, but the ssf value will not be changed:<br />
Warning 09: Internal line rate inconsistent with readout time><br />
The effect in both internal and external line rate modes is that<br />
an EXSYNC is skipped and, therefore, the output will be at<br />
least twice as bright.<br />
• This value is saved with the camera settings.<br />
• This value may be viewed using either the gcp command or<br />
the get srm command.<br />
Related Commands: sem, ssf<br />
Example: srm 0<br />
DALSA 03-032-10158-06