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Sniffing the Rigol's internal I2C bus

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Git:

--- Quote from: seronday on December 12, 2013, 01:36:11 pm ---All the tests were done on a DS1074Z with Ver:00.02.00.SP1.

--- End quote ---

What about the ECC private key, has it changed for Ver:00.02.00.SP1 ?>

sync:

--- Quote from: sync on December 13, 2013, 01:47:00 am ---Edit: I have measurement history now. ;D And i think the region (gated) measuring mode is also new. They are in the 2nd page of the measure menu. Is that the unknown option?

--- End quote ---
The unknown option is not the measuring history and region measuring. I removed the options and still have them.

Carrington:

--- Quote from: marmad on December 13, 2013, 04:18:53 pm ---Happy to help. I haven't installed the 300MHz option yet because:

1) I don't really need the extra bandwidth at this time - although maybe later, in which case I would try it.
2) I'm not 100% sure that HW v.1 fully supports it. Remember, Rigol didn't start offering a 300MHz model until they had developed HW v.2. OTOH, the CAN option is all software.
3) Remember, it's a 2GSa/s scope. The DSO only does sin(x)/x interpolation at 1G & 2GSa/s - everything below that (<= 500MSa/s) uses linear interpolation - which really requires a sample rate >= 8x the highest frequency for a decent reconstruction. SO throwing 300MHz at the DSO, especially at slower sample rates is pushing the envelope. In actual fact, for best reconstruction (and lowest noise), you really should keep the 100MHz bandwidth filter on if you're fairly certain you don't have higher frequencies.

--- End quote ---

Well, if Rigol allow 200 MHz BW limit when the option 300MHz is installed, to me it would seem right.


--- Quote ---100MHz limit gives you a -3dB BW of ~130MHz
200MHz limit gives you a -3dB BW of ~185MHz

...so only a ~55MHz difference between the settings.
--- End quote ---

Yes, not much difference, but adding this option (200MHz BW limit) may be practical, adds another feature and no has HW cost.

marmad:

--- Quote from: Carrington on December 13, 2013, 05:04:02 pm ---Well, if Rigol allow 200 MHz BW limit when the option 300MHz is installed, to me it would seem right.
--- End quote ---

Well, the only way we'll know for sure, unless some owner(s) do a battery of exhaustive tests, is if Rigol starts selling 300MHz BW as an option to HW v.1 owners.


--- Quote ---Yes, not much difference, but adding this option (200MHz BW limit) may be practical, adds another feature and no has HW cost.

--- End quote ---

True, yet still, it's not an included feature for DS2302A buyers (see the manual).

Carrington:

--- Quote from: marmad on December 13, 2013, 05:26:00 pm ---Well, the only way we'll know for sure, unless some owner(s) do a battery of exhaustive tests, is if Rigol starts selling 300MHz BW as an option to HW v.1 owners.

--- End quote ---
How of exhaustive?
Someone volunteers to do the test?


--- Quote from: marmad on December 13, 2013, 05:26:00 pm ---True, yet still, it's not an included feature for DS2302A buyers (see the manual).

--- End quote ---
Yes, I know. But maybe they add it in the future.

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