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Old 10-03-2018, 07:11 PM
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rcheshire (Rowland)
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Join Date: Apr 2010
Location: Geelong
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Hi Luka. If it helps. The back of the 450D sensor (1000D and 550D) is not conductive. The camera chassis is ground and the cold finger is bonded to the chassis - and, it follows, to supply ground.

The apparent emphasis on bonding the copper finger to the camera chassis, was a matter of ensuring that the cold finger (antenna) and camera shared a common analog ground - when running the camera with batteries - separate from the cooling system supply, which is likely affected by PWM switching.

Irrespective of camera design, it should be cold finger to supply ground. On a single analog / digital board, I connected AGND and DGND with a 1uH inductor.
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