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0culus:
I'll let you know what I find once I have one...in the meantime, just for grins I tried pushing the 7A19 and 7B15 a little. While the 7B15 is really intended to go with a 7B10 in a 7104 mcp CRT scope, it works quite nicely and I was able to get a stable trigger at 1.1 GHz. Beyond that the frequency response of the 7A19 (rated at 600 MHz) drops off precipitously to nothing.

Berni:
Now that is a pretty darn fast analog scope.

siggi:

--- Quote from: Neomys Sapiens on April 20, 2019, 02:49:06 am ---When I read the app note for it, it seemed very drawn by the hairs to me. I could not see where the real purpose of the thing is.

--- End quote ---
It's a differential amplifier with decent bandwidth and a nice common mode range. At 1mV/DIV it'll cope with +-10V common mode, which comes out to 10000 DIV common mode.
You can also used it as a single-ended input amp with a massive offset. You could e.g. look at a 3.3V rail with DC coupling at 1mV/DIV in 100MHz bandwidth.
You'd be able to see minute ripple, but also slow "DC" drift, which you wouldn't be able to see with AC coupling.

Neomys Sapiens:

--- Quote from: siggi on April 20, 2019, 07:31:16 pm ---
--- Quote from: Neomys Sapiens on April 20, 2019, 02:49:06 am ---When I read the app note for it, it seemed very drawn by the hairs to me. I could not see where the real purpose of the thing is.

--- End quote ---
It's a differential amplifier with decent bandwidth and a nice common mode range. At 1mV/DIV it'll cope with +-10V common mode, which comes out to 10000 DIV common mode.
You can also used it as a single-ended input amp with a massive offset. You could e.g. look at a 3.3V rail with DC coupling at 1mV/DIV in 100MHz bandwidth.
You'd be able to see minute ripple, but also slow "DC" drift, which you wouldn't be able to see with AC coupling.

--- End quote ---
So there is no threshold or switching involved - the 10-turns or digital adjustment is just for the offset?

siggi:

--- Quote from: Neomys Sapiens on April 20, 2019, 07:37:18 pm ---So there is no threshold or switching involved - the 10-turns or digital adjustment is just for the offset?

--- End quote ---

Yups - essentially you get to dial in a voltage and use it as input to either of the differential inputs, or you can both inputs for a differential measurement.

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