| General > General Technical Chat |
| The Rigol DS1052E |
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| KTP:
Ok, I see what you meant by counterfeit Rigol scopes. You guys were talking about DS1102E scopes that were former DS1052E models before a quick flash of the model and serial number. Since there is not a model below a DS1052E, we must assume *those* scopes are not counterfeit. Then the ebay email that person received that said the DS1052E was being removed because of being counterfeit is probably untrue. |
| Mastro Gippo:
--- Quote from: rf-loop on March 19, 2010, 08:53:19 am ---Sign gen (R&S) out (N or BNC)-------50ohm cable -------- (50ohm GOOD terminator!)-BNC Rigol CHx --- End quote --- So... you're not talking about a T splitter with the signal from one end and 2 100ohm resistor in parallel wired to the other, right? :-\ --- Quote from: tristan on March 19, 2010, 12:22:59 pm ---I think the problems I described a few posts back (scope locking up, corrupted system info display) might have been due to me hitting return before alt-010. --- End quote --- Yes and no (and maybe :D); I happened to do the same mistake, but the scope didn't lock or corrupt; only difference was, when sending the first *idn? command, it replied --- Code: ---Rigol Technologies, DS1052E, DS1ED112404432 , 00.02.02.02.00 --- End code --- instead of --- Code: ---Rigol Technologies, DS1052E, DS1ED112404432, 00.02.02.02.00 --- End code --- |
| flolic:
--- Quote from: Mastro Gippo on March 19, 2010, 01:06:12 pm --- So... you're not talking about a T splitter with the signal from one end and 2 100ohm resistor in parallel wired to the other, right? :-\ --- End quote --- I don't have good experience with T splitter, but maybe there is a problem with it, it is cheap LAN splitter. And you definitely need good BNC 50 ohm coaxial terminator. Two paralleled 100 ohm resistors can do it, but are far from ideal... IMHO, best way is to use feed through 50 ohm BNC terminator, like that on bottom of this page: http://accessories.picotech.com/attenuators.html |
| rf-loop:
Also 2 channels can not test parallel without very special knowledge how to do and without also special things what this need. Test only single channel at once! (first I look this picture and numbers I think that oh... there is two cable and without terminator... ;) ) In emergency situation (with these quite low frequencies) some kind of termination can do so that there is T in the scope end. 50 ohm cable to T and free end of T can put small LOW inductance resistor with as short wires as possible from center to ground. But also can use ethernet terminator if nothing else is in hand. (but both of these need remember that in the high end of frequency there may be some errors. But still these are better than nothing. Most bad of course is try channels parallel.) |
| KTP:
Hey, so how are you guys getting this fast rise time pulses into the DS1052E? I just tried to build a fast rise time circuit to test my newly modified DS1052E and it was fail. I had a fairchild tinylogic NC7NZ14 inverting schmitt trigger that I built deadbug style on a piece of copper circuit board (which was an amazing feat if you consider how small this smt part is. It works, but the scope displays a horrible ringing and the risetime is more like 20ns than the 4ns I was expecting. I have the little copper board connected to the bnc input of the scope through about 1/2 inch of cable and I am feeding the schmitt trigger with a 1khz square wave from a wavetek model 21 FG. Of course the signal looks the same on my TDS 210, so I know the fault is with my setup and not the DS1052E... |
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