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Control software for Raytheon cores?

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Bill W:
Yes, analogue BST has voltage controlled gain and offset.  the same method was provided on 'digital' BST cores as a backward compatibility.

It is explained from an Argus3 viewpoint in the posts from here:
https://www.eevblog.com/forum/thermal-imaging/argus-3-(bst)-teardown-and-repairs/msg3556147/#msg3556147

So far I have not done the Argus2 version which would show how the manual controls are connected to the 80 way connector. 

Bill W:

--- Quote from: Bill W on May 26, 2023, 10:15:34 am ---So far I have not done the Argus2 version which would show how the manual controls are connected to the 80 way connector.

--- End quote ---

However I have some of the files ready, so this should help.

It is the circuit on the Argus2 detector PCB (itself a part clone of the Raytheon one)  showing the interfaces to the BST 80 way connector.

The links are to choose between using external analog, direct pot and automatic for the gain/level control.  Note the BST supplies '+5VCONT' for use on the controls.

Logan:

--- Quote from: Bill W on May 26, 2023, 10:34:46 am ---The links are to choose between using external analog, direct pot and automatic for the gain/level control.

--- End quote ---
So we cannot just increase the max gain in auto mode? When use manual pots, the core will be in full manual mode?

Bill W:

--- Quote from: Logan on May 26, 2023, 12:13:08 pm ---So we cannot just increase the max gain in auto mode? When use manual pots, the core will be in full manual mode?

--- End quote ---

Correct - for the analogue BST.
ENOS, ENGN enable the 'external' / manual control of offset and gain.
The links on ENDC and GNDC are Argus functions between real pots and a digital potentiometer IC controlled by the Argus micro (off sheet)

The DC inputs were simply a way to get a gain and offset vlaue of 0 - 255 in the core.
0V (0) is zero gain - grey screen
0V (0) is zero offset (black) and 5V (255) is full offset (white)
[I think - might be the other way round]

The digital BST also had a further multiplier factor you could change with the software

Logan:
Clear explanation.
Thanks a lot Bill!

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