Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
Circlotron:
Okay, the image names should tell the story.
marmad:
--- Quote from: Circlotron on September 20, 2014, 11:24:44 am ---Okay, the image names should tell the story.
--- End quote ---
Ahh... High Res mode. Do you realize that when you use High Res mode at 2s/div (and 14k mem.depth), the bandwidth of your scope is 14Hz? Just to emphasize: the bandwidth of your DSO using High Res mode at 2s/div and 14k mem.depth is not 70MHz - and not even 50Hz (500Sa/10) -- it's 13.75 Hertz. That hardly seems usable for most things - and might cause the DSO to act strangely, since that mode is not really designed to be used at such slow time bases (High Res is basically useful from 500ns/div to about 10ms/div).
High Res mode is sample averaging, so when using it at any time base slower than 5us/div, you're going to want to have your memory depth set to 14M or AUTO for the best results - but even using 14M @ 2s/div, your BW is still only going to be 21.5Hz.
Anyway, I tested your setup (High Res mode @ 2s/div w/14k) but it works fine on my DS2000 - the trace appears on the display as soon as it's triggered just like it's supposed to. Perhaps it has to do with my test signal, but since you're running an older version of the firmware (I'm using v.3 FW), it might also be related to that too.
Circlotron:
--- Quote from: marmad on September 20, 2014, 12:31:05 pm ---Anyway, I tested your setup (High Res mode @ 2s/div w/14k) but it works fine on my DS2000 - the trace appears on the display as soon as it's triggered just like it's supposed to. Perhaps it has to do with my test signal, but since you're running an older version of the firmware (I'm using v.3 FW), it might also be related to that too.
--- End quote ---
I forget my firmware version but I've had the scope exactly 12 months this week. Only had Riglol hack entered via the menu.
Did another test and in Hi Res mode is displays immediately on trigger down to IIRC 100mS/div. Slower than that and you can wait forever and still nothing. If you want it to appear you can either blip the time/div or switch from Hi Res to Normal and there it is. Then back to Hi Res if you want. In Normal mode it does display immediately on trigger at 2 sec/div. Didn't try any slower. Only recently realised that a yucky, thick, furry trace can be Hi Res'd after the event so despite perhaps being a bug, I can live with it. Just trigger and record, then Hi Res. :-+
marmad:
--- Quote from: Circlotron on September 21, 2014, 10:12:16 am ---I forget my firmware version but I've had the scope exactly 12 months this week. Only had Riglol hack entered via the menu.
--- End quote ---
You're using an older version of the firmware - I can tell by the order of items in your Acquire menu: it has changed around in the latest firmware (as you can see in the images in my previous post).
--- Quote ---Did another test and in Hi Res mode is displays immediately on trigger down to IIRC 100mS/div. Slower than that and you can wait forever and still nothing
--- End quote ---
As already mentioned, High Res is, at best, marginally useful at those time bases, causing the BW of the DSO to be reduced to below 250 Hertz. Best case bandwidths (14M mem.depth) using High Res at 200ms/div and below are:
200ms/div = 215Hz
500ms/div = 86Hz
1s/div = 43Hz
2s/div = 21.5Hz
5s/div = 8.6Hz
10s/div = 4.3Hz
20s/div = 2.1Hz
alank2:
Is the FW#00.03.00.01.03 stable and solid? Better than the 00.02.01.00.03? Any tricks to upgrading? I've got two non-A DS2072's.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version