General > General Technical Chat
The Rigol DS1052E
rf-loop:
yes, first also I have problem... after restart it is agen 1052... then I try some.....
"maybe" serial numbers... ;)
"maybe" 1102 can not be what ever serial number after ..EB..
......also maybe it is meaning what is scope state (run/stop) as you do it and also... maybe need not soft reset or need... before shut off... ;) (really I have not test all variations)
After mod need also do selfcal.
flolic:
--- Quote from: bushing on March 15, 2010, 12:19:30 am ---I'm not seeing anything that looks remotely like a model number or serial number. This was from a DS1052E -- anyone else care to do the same so we can compare?
--- End quote ---
I can do it, but only if you tel me how. Can I dump EEPROM content without desoldering the chip (btw desoldering is not a problem ;) )?
I have 1102E.
Mark_O:
--- Quote from: jone on March 16, 2010, 09:21:25 am ---Changing the serial number from DS1EDxx to DS1EBxx seems to have worked fine, and persists across restarts.
But the model always reverts to DS1052E on restart, any clues what I might be doing wrong?
--- End quote ---
Which one did you change first? I.e., writing the SN may force an update of non-volatile memory, while the Model does not. If Andreas changed his Model first, then the SN; and you did things in the opposite order, that could explain it.
- Mark
rf-loop:
--- Quote from: Mark_O on March 16, 2010, 10:35:12 am ---rf-loop,
thanks for all the additional information, and all the testing you've been doing. Those 200 MHz results are quite impressive.
--- Quote from: rf-loop on March 16, 2010, 09:04:40 am ---Also I have not seen exactly specifications about Rigol "risetime" measurements.
--- End quote ---
The specs in the back of their models indicate 7 nS risetimes for their 50 MHz units, and 3.5 nS for their 100 MHz models. These are standard industry values.
--- Quote ---(but remember I have not test frequency response curve shape. Only with these point frequencies. (yes I have fast look with hand sweep and I can not see any big differencies over band. )
--- End quote ---
Yes, I understand that, and it's a point worth remembering. Unless you have a sweep generator, it's hard to examine the entire bandwidth.
- Mark
--- End quote ---
Yes 3,5 and 7ns are "normal". (this have old history where come this 0,35)
I mean that I do not know how exactly Rigol oscilloscope measure risetime. There is no data in specifications. What values are take for 10 and 90% points. (highest value or some value after shoots as I have see some scopes do)
(this question can make specially after drive sine to scope and use scope automatic measurement. In some cases it show totally fast risetimes specially with high frequencies. So this is clear that scope do not use p-p points for 10 and 90% points for calculate risetime.
Most good accuracy can get without sweep gen. But it is hard work...
With sweep gen with digital oscilloscope is very easy go to garbage...
And also it is impossible to sweep whole band at once... (with analog scope situation is littlebit different)
How can read exactly values in separate freq points. My opinion is that only road for accurate testing is do it with measuring single freq points.
Mark_O:
--- Quote from: rf-loop on March 16, 2010, 11:03:00 am ---I mean that I do not know how exactly Rigol oscilloscope measure risetime. There is no data in specifications. What values are take for 10 and 90% points. (highest value or some value after shoots as I have see some scopes do)
--- End quote ---
Ah, yes. I see what you mean now. 10% and 90% of which data points. Thanks for the clarification.
- Mark
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