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Old 10-03-2018, 07:11 PM
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rcheshire (Rowland)
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rcheshire is offline
Join Date: Apr 2010
Location: Geelong
Posts: 2,624
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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