General > General Technical Chat
The Rigol DS1052E
TrentO:
Filip,
Excellent pictures!!!
They put my instant-camera photos to shame!
I'm going to start my analysis today-- I intend to use my Tektronix TDS 220 and 66, 100 and 125 MHz clock sources to find the source of attenuation.
I think your pictures will serve as an excellent reference for our efforts-- they are that good!
-Trent
TrentO:
No obvious differences between my DS1052E and Flolic's DS1102E-- I disassembled my 1052E again to compare (due to my worthless / crappy photos.)
I then decided to feed my 1052E a constant 125MHz waveform and attempt to measure attenuation along at the test-points. This turned out to be a no-can-do. (For those that bitch about file size, just don't look at it.)
--- End quote ---
The photo shows my Rigol happily displaying 125MHz at 1.62 V-p-p, and my Tektronix in the background displaying the same, at about 400mv-p-p. But, notice-- the probe going to the Tektronix is simply sitting on the workbench with the tip shorted out. There is so much RFI generated by my clock source, that my entire workspace is bathed in a 125MHz waveform! It's the same with the Rigol switched off; unplugging the bnc from the Rigol diminishes the signal quite a bit, but the only way to eliminate it, is to turn off the hardware providing my clock source, or removing the probe-tip from the oscillator lead.
So basically, the 125Mhz on the Rigol metal case (acting as an antenna) is higher than the signal I can find on the Rigol test-pads or even the center lead on the bnc header itself!
That dedicated function generator is starting to look like an attractive purchase again....
-Trent
TrentO:
--- Quote from: flolic on November 13, 2009, 10:54:47 pm ---PBut that diode right next to the big primary side electrolytic reached 94C!!!
--- End quote ---
Really? The one in mine only gets a little warm-- I can keep my finger on it while the unit's on. Don't worry-- I was careful... and we use only 120v AC here in the U.S. ;)
Simon:
I think its so that the memory lasts long enough, everyone "lies" about there products, or to put it more sutley and as captain spock would: exagerates
qno:
That would be logical...................
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