Products > Test Equipment
Sniffing the Rigol's internal I2C bus
Carrington:
At least the transistors seem to be the same. But the compensation stage is certainly different.
Note: I refer to the previous image.
@ Marmad.: You know if there are different 1.0 versions?
For example HW.v.: 1.0.1.0.0 / 1.0.0.0.0 / 1.0.1.0.1 ...
EV:
Ok, I run the self calibration and new sweep. Maybe there is a small improvement. BW seems to be now about 310 MHz.
In the picture is sweep from 1 MHz to 350 MHz. Sweep time is 14 s, so one horisontal craticule division is 25 MHz. Cursor lines show the 3 dB levels.
--- Quote from: EV on December 16, 2013, 02:14:57 pm ---No, I run the calibration and then the sweep again. Wait a moment!
--- Quote from: marmad on December 16, 2013, 02:02:00 pm ---@EV: BTW, did you run the self-calibration after installing the 300MHz option (or before running the sweep)?
--- End quote ---
--- End quote ---
EV:
The true 50 Ohm input is propably better than this feed through terminator.
--- Quote from: marmad on December 16, 2013, 02:31:21 pm ---
Then it seems even more illogical that they didn't sell a 300MHz version DS2000 a year and a half ago - unless it was only because of the lack of 50 Ohm input.
--- End quote ---
Carrington:
--- Quote from: EV on December 16, 2013, 03:06:27 pm ---The true 50 Ohm input is propably better than this feed through terminator.
--- End quote ---
I've always thought the opposite.
Carrington:
Inverted -> after calibrated.
Where is the difference in BW? :-//
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