Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
<< < (377/566) > >>
marmad:

--- Quote from: JDubU on December 17, 2013, 06:23:38 pm ---Do these waveform update rates change if you change the frequency of the input signal (change the trigger rate)?

--- End quote ---

I always use a 1MHz sine - but I've noticed there is some variation (maybe +/- 5%?) based on the trigger frequency - just as there is based on the input levels (and virtually anything else). I've never done extensive testing, but feel free to work it out if you'd like  ;)
Galaxyrise:

--- Quote from: NikWing on December 17, 2013, 05:14:06 pm ---and that's not a new bug?
dropping from 47k to 17k while nearly all other values got better?

--- End quote ---
I find it more likely that the old figure was caused by a bug (billed as a feature), since it was such a discontinuity.  But like marmad says, it's hard for us to know what's an intended consequence of balancing features and what's an unintended drop in wfrm/s.  Hopefully someone at Rigol knows :)
marmad:
Found a bug in the new firmware - incorrect setting of the sample rate in DOTS mode at certain time bases it appears to be a bug between sample and display memory.

It seems to affect AUTO/14M/56M memory settings while in DOTS mode @ time bases >= 5us/div.

If someone still has FW v.01.01.00.02 installed, could they please double-check to make sure this bug is NOT present in that FW?

To test:

Single channel on; DOTS mode; test signal input (e.g. 1MHz sine); AUTO memory setting.

Go from 100us/div to 200us/div - and watch the image change. The sample rate appears to be wrong for the displayed image (it's supposed to be 2GSa/s):

marmad:
Following up on the bug discovered: problems in DOTS mode @ >= 5us/div.

This waveform chart shows how the update rates for DOTS mode are always better than VECTORS until 5us/div, at which point they get drastically worse. Something is definitely wrong here:


JDubU:

--- Quote from: marmad on December 17, 2013, 07:07:46 pm ---Following up on the bug discovered: problems in DOTS mode @ >= 5us/div.

This waveform chart shows how the update rates for DOTS mode are always better than VECTORS until 5us/div, at which point they get drastically worse. Something is definitely wrong here:

--- End quote ---

HW2, latest firmware.

I can confirm your waveform update findings in Dots vs. Vector mode at timebases >= 5us/div.

In regards to your previous post:  Dots mode 100us --> 200us.  The 200us setting does produce a display with unique dot artifacts at that one setting but, if I stop the sampling and zoom in, the sampling rate does match what is displayed at the top of the screen (by counting the dots per horizontal division).

Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod