Author Topic: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes  (Read 240817 times)

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Offline 2N3055

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1550 on: December 14, 2019, 09:42:37 am »
Sometimes you want to trigger off some signal, but don't want it use screen space, because there is nothing interesting about it.
In that case you trigger from that channel and switch it off the screen. Which is exactly same behaviour as if you use External Trigger input.
Most of the scopes nowadays allow switching channel off while using it for trigger. It is a useful thing that I use very often.

This particular oscilloscope allows you to hide a particular channel (its  trace) but the channel should be turned on. I assumed that if the channel is turned off then it becomes nonfunctional i.e. it cannot be used for anything (triggering etc). Am I wrong?

I don't know about Siglent, but Keysight MSOX3104T works exactly like that: If you set it to trigger form CH3, and press channel button to disable it, it will disappear from screen but it will keep on triggering from it. It can be confusing sometimes, but useful...
 

Online tautech

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1551 on: December 14, 2019, 09:59:16 am »
Sometimes you want to trigger off some signal, but don't want it use screen space, because there is nothing interesting about it.
In that case you trigger from that channel and switch it off the screen. Which is exactly same behaviour as if you use External Trigger input.
Most of the scopes nowadays allow switching channel off while using it for trigger. It is a useful thing that I use very often.

This particular oscilloscope allows you to hide a particular channel (its  trace) but the channel should be turned on. I assumed that if the channel is turned off then it becomes nonfunctional i.e. it cannot be used for anything (triggering etc). Am I wrong?

I don't know about Siglent, but Keysight MSOX3104T works exactly like that: If you set it to trigger form CH3, and press channel button to disable it, it will disappear from screen but it will keep on triggering from it. It can be confusing sometimes, but useful...
Siglent's are different, there are 3 states for a channel; OFF, ON and ON but Hidden.
In only the ON state can a channel be triggered from; ON and visible or ON and Hidden.

I agree with Performa01, we drive the tool and NOT the tool makes choices for us....unless we select Autoset.  ::)
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Offline CiscERsang

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1552 on: December 14, 2019, 07:32:51 pm »
Greetings,
Could anyone say me something on this matter?

f=19.2kHz is plausible value? Does this mean that signal is being sent ~19000 times per second. Or?
 






 

Offline TK

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1553 on: December 14, 2019, 08:34:27 pm »
No, it is related to the time it takes for the signal to swing from high to low to high.  Nothing related to how many times the signal transitions levels.
 
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Offline 17_29bis

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1554 on: December 15, 2019, 01:58:58 am »

The AC (and LF-reject) trigger can be highly dynamic and the absolute trigger level position would change all the time, hence would have to be displayed permanently. This might consume valuable processing power and would be visually distracting on top of that. You still see the selected relative trigger level in the trigger info tab.

Thanks for the explanation. Indeed it has been already discussed several times, for example:

https://www.eevblog.com/forum/testgear/siglent-technical-support-join-in-eevblog/775/

I simply forgot about it.

 

Offline CiscERsang

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1555 on: December 15, 2019, 07:14:05 am »
No, it is related to the time it takes for the signal to swing from high to low to high.  Nothing related to how many times the signal transitions levels.

then, is there a way to see a frequency wich is related to trigger and shows how many times per second the frame is triggered?
 

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1556 on: December 15, 2019, 07:16:36 am »
No, it is related to the time it takes for the signal to swing from high to low to high.  Nothing related to how many times the signal transitions levels.

then, is there a way to see a frequency wich is related to trigger and shows how many times per second the frame is triggered?
Cursor measurements between the start of packets will give you the Baud rate.
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Offline Performa01

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1557 on: December 15, 2019, 07:47:29 am »
No, it is related to the time it takes for the signal to swing from high to low to high.  Nothing related to how many times the signal transitions levels.

then, is there a way to see a frequency wich is related to trigger and shows how many times per second the frame is triggered?
You can monitor the trigger output at the back of the instrument with a 2nd DSO or a frequency counter with long gate time.

You can also go to the history and turn the list view on. This will show the past trigger events with a timestamp that has microsecond resolution and you also get the delta time between the trigger events automatically calculated.

If you want a deep history (more entries), just limit the record length in the Acquire menu. You don't need 7Mpts and 500MSa/s for a slow serial message, 70kpts and 5MSa/s would be plenty for that.
 
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Offline CiscERsang

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Offline 2N3055

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Offline Nobby42

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1560 on: December 17, 2019, 09:02:56 pm »
Hello, I have an SDS1204X-E and have a question.
If I have 2 different signals. For example 1 sine with 100khz and one sine with 95khz. How can I trigger on both signals so that they stand still on the screen?
I miss a alternate mode.

Kind regards

Norbert
 

Online Martin72

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1561 on: December 17, 2019, 09:39:44 pm »
Hi Norbert,

Have a look at dave´s video:



(especially at 8:45 and further)

Martin

Offline Nobby42

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1562 on: December 22, 2019, 05:14:20 pm »
Hi Martin

the pattern trigger not really work for sinus.
Example: One sinus 100khz an one with 79khz.
My cheap OWON scope has no problem with that. It has a alternate trigger.
There is a way for a feature request at Siglent?

Norbert
 

Online Martin72

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1563 on: December 22, 2019, 06:45:09 pm »
Hi,

Quote
the pattern trigger not really work for sinus.
Example: One sinus 100khz an one with 79khz.

Tried out on my rigol mso5, pattern doesn´t work ( no OR function), but "Setup/Hold" does.
Maybe the siglent have this trigger type too ?

Martin

(Meanwhile I realise, that posting a still image makes no sense..)

« Last Edit: December 22, 2019, 07:01:32 pm by Martin72 »
 

Offline e0ne199

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1564 on: December 23, 2019, 04:43:02 pm »
Hi Martin

the pattern trigger not really work for sinus.
Example: One sinus 100khz an one with 79khz.
My cheap OWON scope has no problem with that. It has a alternate trigger.
There is a way for a feature request at Siglent?

Norbert

just out of curiosity i have also tried your setup and looks like siglent 1000x-e series are unable to trigger signal with different frequency independently...i have tried every setup to make the signal with different frequencies stand still but looks like i am unable to do that with siglent scopes....
 

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1565 on: December 23, 2019, 07:44:02 pm »
Hi Martin

the pattern trigger not really work for sinus.
Example: One sinus 100khz an one with 79khz.
My cheap OWON scope has no problem with that. It has a alternate trigger.
There is a way for a feature request at Siglent?

Norbert

just out of curiosity i have also tried your setup and looks like siglent 1000x-e series are unable to trigger signal with different frequency independently...i have tried every setup to make the signal with different frequencies stand still but looks like i am unable to do that with siglent scopes....
See this post for an example using Patten OR H triggering:
https://www.eevblog.com/forum/testgear/oscilloscope-non-alternating-between-channels-type/msg2382687/#msg2382687
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Offline Nobby42

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1566 on: December 24, 2019, 10:22:51 am »
Hi, I got it. I use "Logic OR".
But if I change the second frequency, then I have to readjust the level. Not pretty. The best way is to use an alternate trigger.

Happy Christmas
« Last Edit: December 24, 2019, 10:25:16 am by Nobby42 »
 

Offline e0ne199

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1567 on: December 25, 2019, 01:24:17 am »
Hi, I got it. I use "Logic OR".
But if I change the second frequency, then I have to readjust the level. Not pretty. The best way is to use an alternate trigger.

Happy Christmas

what kind of trigger did you use? normal or auto?
 

Offline Nobby42

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1568 on: December 27, 2019, 03:34:30 pm »
Hi.

what kind of trigger did you use? normal or auto?

I have testet both.
 

Offline HendriXML

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1569 on: December 31, 2019, 12:37:58 am »
I'm trying to have the scope send a service request (SRQ) when the trigger is ready or a signal is acquired. So no status polling would be needed.
(I have SRQ call-backs working on a Keithley DMM6500, which is quite handy.)

Those states can be read using the INR? command, reading the "Internal State Change Register". (Which works using the polling method)

The *STB? query returns the status byte register, bit 0 would be set when a change in the "Internal State Change Register" occurs when the corresponding bit is enabled in the "Internal State Change Enable Register".

That bit 0 can be enabled to actually send a service request using *SRE 1
-- that seems to be working: *SRE? returns 1

There's only a slight problem, the command INE, which would enable bits in the "Internal State Change Enable Register" does not seem to function.
(That is not entirely surprising because a lot of this stuf is not in the documentation, but the scope should be able to work this way IMO.)

Siglent documentation however refers to enabling the event bit, but does not explain how.

Google finds this document:
http://cdn.teledynelecroy.com/files/manuals/dda-rcm-e_05.pdf
or
http://cdn.teledynelecroy.com/files/manuals/wm-rcm-e_rev_d.pdf
Somehow LeCroy and Siglent seems to be related when it comes to SCPI. Other LeCroy documents served me well. But the INE command, which would be a most logical command, does not work.

Any suggestions?
« Last Edit: December 31, 2019, 12:08:24 pm by HendriXML »
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Offline MikeLud

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1570 on: January 01, 2020, 04:11:37 am »
I thought the SDS1104X-E only has a memory depth of 14 Mpts. If you have the timebase set to 5.00ms/div the display shows the a memory depth at 17.5 Mpts (see the below image). Is this a bug or you are getting 17.5 Mpts.

« Last Edit: January 01, 2020, 04:18:16 am by MikeLud »
 

Online Rerouter

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1571 on: January 01, 2020, 05:06:01 am »
you are getting the depth shown,
 

Offline MikeLud

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1572 on: January 01, 2020, 05:59:42 pm »
Thanks Rerouter
 

Offline ewaller

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1573 on: January 02, 2020, 08:48:53 pm »
I've been playing around a bit writing some Python 3 code to talk to my SDS1204E-X.  The screenshot below is a (pseudo) real time 3D waterfall display in which keeps track of the last 512 traces and scrolls them in time.  Shown is a Lorentz pulse that is AM modulated by a sine wave.  The latest trace is  imaged in the window in the top right corner.  If anyone is interested, I'll post it to PyPI.  It runs on Linux (Arch Linux with i3wm in this screenshot).  It should work on other distributions.  It should work on Windows, but I have no way to check that.

« Last Edit: January 02, 2020, 08:50:27 pm by ewaller »
 
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Offline HendriXML

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Re: Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
« Reply #1574 on: January 03, 2020, 12:03:50 am »
Nice graph!
I'm interested. (For now mostly to checkout the code/scope interactions for learning purposes)
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