From: Milton Aupperle <milton@outcastsoft.com>

Date: January 19, 2010 9:52:12 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: New AstroIIDC user


Kurt;


Two things about frame rate.


It depends on how old your Scorpion is and possibly what firmware load it has.


I have the 2004 and 2008 Scorpion Tech Ref manuals here in front of me.


For Fixed modes the 2004 models only run at 15 fps maximum speed for 8 bit and 7.5 fps for 16 bit at 800x600.


The 2008 models are listed as 30 fps, but there is a foot note that says 25 fps. The 25 fps is technically illegal because it violates the fixed size frame rate rules which are always set to as 1/2 rate multiples (i.e. 240, 120, 60, 30, 15, 7.5 etc.). Also, because it's not a binned mode, the camera should be limited to what the CCD clock rates indicates it's maximum frame rate is is 14.98 fps.


For Variable modes (Format 7), the 2004 models do not support any of the binned modes (Format 7, Mode 1 or Format 7,2) which are only listed in the 2008 manual.


So your frame rate mileage may vary depending on what date of creation and what firmware load the camera has.


On a side note, Astro IIDC will likely not allow you to select 25 fps as that violates the Fixed Format Spec 1/2 frame rate rules (it should be either 30 or 15 fps). However if you check mark the   "Adjust frame rate for 50Hz light sources to eliminate flicker" item in the Preferences section (see page 72 of the Astro IIDC help / manual for details on what it does) then it may allow 25 fps as a valid frame rate.


HTH..


Milton Aupperle




On 19-Jan-10, at 8:57 AM, mihalco wrote:


Hi Alan,

Take a look at the "Standard Image Formats" in this document.  You will see in the table that the 20SO supports 800 x 600 Y16 and Y8 at 30fps (really 25fps per the Scorpion Technical Ref Manual).  This is not one of the Partial Image formats (mode 7) in the following table, which I agree max out at 21 fps.  I'm using Pt. Grey's FlyCap2 program from their SDK on a PC which does run the 20SO at these resolution, bit depth and frame rate. Since I think you have this same camera, how about trying it out with AstroIIDC in Format 1, Mode 6 (800 x 600 Y16), and Format 1, Mode 2 (800 x 600 Y8) and see what you get?

Best Regards,

Kurt


--- In Astro_IIDC@yahoogroups.com, Alan Friedman <alan@...> wrote:


Hi Kurt,


Per PGR's specification sheet for the scorpion, the frame rate for the 20SO with ROI selection max's out at 21 fps:


http://www.ptgrey.com/support/downloads/documents/Scorpion%20Getting%20Started%20Manual.pdf


Your capture software might allow a faster setting to be selected, but if you try timing a capture and counting the frames, I think you will find the actual frame rate to be in line with these specifications.


best,

Alan


<snip>




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Milton J. Aupperle

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