Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
Wim13:
In my post of 25 dec 2013, already noticed that there as more noise on the FW 00.02 version, with two channels enabled.
Not with 1 channel enabled, then the signal is clean.
so i tested version FW 00.03 but still the noise is there.
Test signal is 100 Mhz 0 dB, on other scoop it is a steady clean signal. ( also on FW 00.01.01, or on one channel ) )
In a later post there was stated that it has to do with the shading.
But if you look at the RMS values they also changes a lot, difference between one channel and two channel enabled.
the best version was and is still 00.01.01, gives the best result.
See pictures below, test1 is FW 00.01.01, test2 is FW 00.02, and test3 is FW 00.03
Wim13:
Implementation of FFT, differenses between DS2000 and DS1000z, most
things works the same on these two DSO.
i had the possibility the see the FFT on a DS1000z, most things are the same
on a DS2000 and a DS1000z.
But on the DS1000z the FFT is more user friendly, even better as on the DS2000
Mark_O:
--- Quote from: Wim13 on April 13, 2014, 01:34:09 pm ---so i tested version FW 00.03 but still the noise is there.
Test signal is 100 Mhz 0 dB, on other scoop it is a steady clean signal. ( also on FW 00.01.01, or on one channel ) )
--- End quote ---
On Test3-1 vs. Test1-2, it's obvious the intensity grading is significantly higher. Did you change that, or is the firmware rendering the same level setting differently?
Wim13:
No i did not change the grading, but the signal in test 1 is much cleaner.
in the pictures the same singal generator is used and the same setting.
Teneyes:
--- Quote from: Wim13 on April 13, 2014, 01:34:09 pm ---so i tested version FW 00.03 but still the noise is there.
Test signal is 100 Mhz 0 dB, on other scoop it is a steady clean signal. ( also on FW 00.01.01, or on one channel ) )
--- End quote ---
EDIT: This is better in Latest Firmware 00.03.00.01.03
Here are displays showing Dot sample . #1 Ch1 only then #2 display of Ch1&Ch2
In dots mode the Vrms on Ch1 =425mV
In dots mode the Vrms on Ch1 =429mV with Ch2 on
In vector mode the Vrms on Ch1 =447mV with Ch2 on
In vector mode the Vrms on Ch1 =420mV with Ch2 on and at 2ns/div
I think a the Sin(X)/x interpolation is making some of the difference.
With TB set to 2ns/div the waveform is more accurate.
There is some affect when Ch2 2 is ON. there are Many factors to consider.
These displays are with 2048 point averaging to filter noise
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