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

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod