Products > Test Equipment
SDS1104X-E DC offset in AC coupling
pope:
--- Quote from: BillyO on April 04, 2023, 04:09:24 pm ---
--- Quote from: pope on April 04, 2023, 03:00:54 pm ---What is the VGA configuration?
--- End quote ---
Variable Gain Amplifier. They are used in the front ends of scopes (and possibly other places)..
https://www.ti.com/lit/gpn/lmh6518
--- End quote ---
Thank you. So, what sort of improvement should we expect by this update/ optimisation?
I'm just a bit nervous to update the o'scope in case it messes up with the offset as already mentioned...
BillyO:
Not sure why they would do it. Maybe gain sets were off a little.
Bionicbone:
And is this VGA only related to the hardware 09 issue as per previous update?
Deso:
--- Quote from: BillyO on April 04, 2023, 04:09:24 pm ---Variable Gain Amplifier. They are used in the front ends of scopes (and possibly other places)..
https://www.ti.com/lit/gpn/lmh6518
--- End quote ---
Ha, you're fast. I read tons of posts of @TV84 so I could dig deeper and found that the VGA chip must be the LMH6518 (which by the way has the ability to limit the input bandwidth programmatically).
BillyO:
--- Quote from: Deso on April 05, 2023, 07:42:27 am ---Ha, you're fast.
--- End quote ---
Well, maybe, but in this case I can't take credit. I saw the teardown that Dave did on it. The VGA was pointed out in that vid.
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