Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
marmad:
--- Quote from: NikWing on December 07, 2014, 09:16:35 pm ---and I push the stop button, I see multiple lines on screen until I change the time base (and back to where it was)
is that a bug?
--- End quote ---
When you first stop the DSO, you see the compilation of the intensity buffer (all captured waveforms during the last period). If you change time base or scale, you just see the very last captured waveform.
--- Quote ---and I add another question about triggering:
I've attached a random picture. Usually I would trigger at A
is it possible to trigger at B although there's a higher peak in the signal? Is it possible to tell the scope to always trigger at a desirered point on the curve?
Would I set the trigger level to let's say B and then use delay/offset or nth recurrence, or is there another way?
--- End quote ---
There are different ways to do it with different trigger types. I'd probably use Pulse with trigger delay or Nth Edge with idle. The DS2000 manual gives pretty good images for each trigger type.
--- Quote ---And, would it be possible to analyze just the part I marked with C, as in pretending that this is the real signal (which kinda "repeats" between B and A)?
I don't know how to phrase that D:
--- End quote ---
I'm not sure what you mean by 'analyze'. Of course, you can adjust the trigger and delay so that the part labelled C basically fills the screen.
ted572:
--- Quote from: Teneyes on December 07, 2014, 08:34:46 pm ---
--- Quote from: Purevector on December 07, 2014, 07:20:50 pm ---I have found a bug related to switching between roll and YT mode in the newest firmware. Here is the description:
--- End quote ---
NOT a Bug, but you found the Limits of the Specifications
the 1st two displays show no error at 18mv, Roll to YT ( noise)
As you can see there is No error in the Scale
Now read the Specification in next Pix
because you are using 10x your input is 1.8mV, which is below Spec.
Pix 5 & 6 confirm your displays with 10X
( I think I saw this and reported it to Rigol as the DSO is still triggering , but they responded that the input is out of Spec)
I hope that Helps
--- End quote ---
Teneyes:
This also looks like a Bug to me. Please, why would Trigger level effect the vertical display/measurement when switching from 'ROLL' to 'Y-T' Mode?
Thank you, ted572
Teneyes:
--- Quote from: ted572 on December 08, 2014, 12:21:05 am ---Teneyes: This also looks like a Bug to me. Please, why would Trigger level effect the vertical display/measurement when switching from 'ROLL' to 'Y-T' Mode?
--- End quote ---
CORRECTION , Yes a rare bug
Thanks Ted, I removed any Trigger level causes by using External Trigger (5 V sync pulse)
Also set the input Scaling to 1x
Used a 2 cycle burst to set roll and trigger time
I find the bug of 1/2 scaling occurs for this Setup
1. Lowest V/Div scale (500uV/div @ 1X, 5mV/div @ 10X..... )
2. After Switching from Roll to Y-T
The scale is corrected after:
1 The scale is clicked lower (still the Same 500uV/div)
2 The vertical position is changed
3. The vertical position is Zeroed
4. The trigger position is Changed or Zeroed
5. Chan 2 ( even Off) position is Zeroed
I hope that would help Rigol narrow the code that needs to be called when switching to Y-T mode
The 3 Displays with 3.6mV,
Roll mode
Y-T mode
Y-T mode after a knob click
Edit: I have reported this to Rigol , anyone with D2000A , wish to confirm This bug
Edit: Occurs when Chan 1 only is on
Teneyes:
--- Quote from: Teneyes on December 08, 2014, 03:42:26 am ---I find the very osbcure small bug of 1/2 scaling occurs
--- End quote ---
Update More conditions
I find the bug of 1/2 scaling occurs for this Setup
DS2000 system Power on set to Default
1. Lowest V/Div scale (500uV/div @ 1X, 5mV/div @ 10X..... )
2. After Switching from Roll to Y-T
3. Even though Chan 2 is Off (Chan 2 is NOT at 500uV/Div)
The scale is corrected after:
1 The Ch 1 scale is clicked lower (still the Same 500uV/div)
2 The vertical position is changed
3. The vertical position is Zeroed
4. The trigger position is Changed or Zeroed
5. Chan 2 ( even Off) position is Zeroed
6. Changing Chan2 scale to lowest even while Chan 2 is off (Parameter overrange)
Stops the re-Scaling when switching from Roll to Y-T
I hope that would help Rigol narrow the code that needs to be called when switching to Y-T mode
Purevector:
--- Quote from: Teneyes on December 08, 2014, 03:42:26 am ---
--- Quote from: ted572 on December 08, 2014, 12:21:05 am ---Teneyes: This also looks like a Bug to me. Please, why would Trigger level effect the vertical display/measurement when switching from 'ROLL' to 'Y-T' Mode?
--- End quote ---
CORRECTION , Yes a rare bug
Thanks Ted, I removed any Trigger level causes by using External Trigger (5 V sync pulse)
Also set the input Scaling to 1x
Used a 2 cycle burst to set roll and trigger time
I find the bug of 1/2 scaling occurs for this Setup
1. Lowest V/Div scale (500uV/div @ 1X, 5mV/div @ 10X..... )
2. After Switching from Roll to Y-T
The scale is corrected after:
1 The scale is clicked lower (still the Same 500uV/div)
2 The vertical position is changed
3. The vertical position is Zeroed
4. The trigger position is Changed or Zeroed
5. Chan 2 ( even Off) position is Zeroed
I hope that would help Rigol narrow the code that needs to be called when switching to Y-T mode
The 3 Displays with 3.6mV,
Roll mode
Y-T mode
Y-T mode after a knob click
Edit: I have reported this to Rigol , anyone with D2000A , wish to confirm This bug
Edit: Occurs when Chan 1 only is on
--- End quote ---
My unit is a DS2000A; this has nothing to do with triggering, so lets not confuse the issue... it is repeatable in auto trigger mode even if the trigger level is set too high.
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