Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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Carrington:

--- Quote from: PA0PBZ on January 07, 2014, 04:56:38 pm ---Yes it is in hi res because the original from EV was also in hi res.

--- End quote ---
Please can you repeat the same test for 1ns/div, but not in stop mode and/or hi res.
Thanks.
marmad:

--- Quote from: alank2 on January 07, 2014, 04:42:52 pm ---Does anyone have a good description for how the hi resolution mode works?  The manual didn't really help me understand it.

--- End quote ---


--- Quote from: PA0PBZ on January 07, 2014, 04:56:38 pm ---Yes it is in hi res because the original from EV was also in hi res.

--- End quote ---

At those time bases in HighRes, the DSO is just doing sin(x)/x interpolation and filling in the display memory with points instead of vectors. It does absolutely nothing that Normal mode and sin(x)/x don't do - except display the trace dotted.
marmad:

--- Quote from: PA0PBZ on January 07, 2014, 03:32:37 pm ---Bandwidth DS2302 HW 2, signal generator on 1 volt, 10 Mhz steps:

--- End quote ---

Sorry, but I'm not sure I buy this BW chart.

If the filter is really only ~-5.5dB down at 500MHz, I believe the DSO will run into problems with sin(x)/x interpolation - which is highly susceptible to errors if the original signal contains frequencies higher than the Nyquist frequency. With 2 channels turned on and a 1GSa/s rate, the Nyquist frequency is 500MHz.

According to previous BW charts posted, the original DS2202 was ~-16dB down at 500MHz. Having a slower roll-off and a higher passband is NOT a good thing if the rest of the hardware doesn't support it.
PA0PBZ:

--- Quote from: marmad on January 07, 2014, 06:31:03 pm ---Sorry, but I'm not sure I buy this BW chart.

--- End quote ---

Atttached Excel sheet with the measurements.

PA0PBZ:
Hmm, this is indeed a bit  :-BROKE
Just turning on the grounded channel 2 kills the channel 1 waveform:

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