Siglent SDS 1104X-E issues - Page 1
Forum section: electronics / beginners

author: worstbread
author_rank: Newbie
timestamp: December 27, 2022, 03:33:14 pm
content: Hello,I got a Siglent SDS 1104X-E for X-Mas, I am doing some beginner tutorials, but I have some issues, and I don't know if this is normal or not.I build a simple RC circuit with 2 buttons to charge and discharge a capacitor to see the charge time etc. Since I am using a fairly big one the charge time is around 200ms. If I change the Horizontal value to anything above 50ms the Oscilloscope gets super slow, and it takes forever to capture the change. Sometimes it doesn't even get it.The second issue is that changing the trigger from Auto to Single with Edge and rising slope does not capture the change. When I discharge and change its falling slope, it works. When I change the slope to alternating, it only works for the discharge but not the charge.In the attached video you can see the single trigger issue, before the discharge I pressed the charge button, but nothing triggered.Thanks!Video:https://streamable.com/yl59fn

author: BillyO
author_rank: Super Contributor
timestamp: December 28, 2022, 04:27:29 pm
content: Your trigger is set to 0V. If there is any residual charge on you capacitor it may not trigger. Try setting the trigger to just above 0V, this might help.If not, please include a schematic of what you are doing showing everything including the measurement point.Also, your video is marked as "archived" and is not viewable.

author: ifonlyeverything
author_rank: Regular Contributor
timestamp: December 28, 2022, 06:59:22 pm
content: Quote from: worstbread on December 27, 2022, 03:33:14 pmYour scope goes into roll mode for time bases >50 milliseconds. My SDS 1104XU is still pretty new to me but I don't believe there is any way around this. You can find this in the manual, page 51/204 of the PDF.https://siglentna.com/USA_website_2014/Documents/UserManual/SDS1000X&Xplus_UserManual_UM0101X-E02A.pdfQuoteIt would help to see a video for your second question. I get an error saying "This video has been archived and is not available to watch at this time."

author: 807
author_rank: Frequent Contributor
timestamp: December 28, 2022, 11:57:56 pm
content: Roll mode isoptionalon time base settings of 50ms/div or slower.This manual covers the 4 channel scopes...https://siglentna.com/wp-content/uploads/dlm_uploads/2021/08/SDS1000X-ESDS1000X-U_UserManual_EN05B.pdf

author: tautech
author_rank: Super Contributor
timestamp: December 30, 2022, 04:52:24 am
content: Quote from: 807 on December 28, 2022, 11:57:56 pmNot exactly.The are actually 2 Roll modes, Dedicated and Auto Roll mode.Auto is engaged at 50ms/div or slower and Dedicated is activated by the Roll button below the timebase control.

author: 807
author_rank: Frequent Contributor
timestamp: December 30, 2022, 01:39:30 pm
content: My scope doesn't go into auto roll mode on horizontal settings of 50ms/div or slower. I have to manually use the Roll button to enable it. There's nothing in the manual about auto roll.Unless it's in the latest V6.1.37R9 firmware. I'm still on V6.1.37R8 at the moment. Haven't got round to updating it yet.

author: graybeard
author_rank: Frequent Contributor
timestamp: December 30, 2022, 09:41:27 pm
content: Quote from: 807 on December 30, 2022, 01:39:30 pmThat's the way the roll mode on mine works and I like it. I don't want it to roll unless I have it enabled.I played with it some more and if it in not in roll mode and the sweep is faster than 50 ms/div and hit the roll button it goes to 50 ms/div. It stays in roll mode for 50 ms/div or slower, and the roll button lights. If the sweep is adjusted to 20 ms/div or faster the roll light goes out, but it returns to roll mode for 50 ms/div or slower. It appears the scope remember the state of the roll button.I do have an issue with the measure mode. The measurements when I don't have the statistics enabled disappear when I hit clear screen, even the the measurement button is on and lit. When statistics are enabled they stay on screen when the soft button labels are gone.I really want the measurements to be on screen with the soft buttons off. I personally think this is an error on the UI, that is in every version of the firmware I have used. Including the current 6.1.37R9 that I am using now.

author: tautech
author_rank: Super Contributor
timestamp: December 31, 2022, 06:31:23 am
content: Please be more observant to understand how these scopes work.There are indeed 2 Roll modes, Auto and dedicated Roll mode.InAuto modethe red flagAcquiringappears at slow timebase settings anduntil a full screen of data is gathered there will be zero on the display other than the Acquiring flag.Dedicated Rollmode OTOH immediately displays the start of a sweep beginning on the right and as it is immediately visibleno Acquiring flag is required.Below examples, all @ 500ms/div (7s to fill the 14div display) are of some Stop'ped to demonstrate now the scope collects data when in either Roll mode with only Auto Roll mode displaying the Acquiring flag.PNG5 is the only screenshot from the dedicated Roll mode activated by the button on the front panel.

author: 807
author_rank: Frequent Contributor
timestamp: December 31, 2022, 01:47:01 pm
content: Surely if you don't press the Roll button, then the scope is still in "normal" mode whatever horizontal setting you set?At settings of 100ms/div or slower the "Acquiring" message appears (it doesn't appear at 50ms/div), but surely that is just to let you know that a display will appear soon, as it will not appear on screen until it has travelled invisibly from right to left (for example, after 14 seconds with timebase set to 1s/div). Otherwise you might wonder why there's a blank display.It seems to behave the same way as the faster timebase modes. The difference being that with the faster timebase modes, the signal travels so fast across the screen, that you don't notice the delay before it's shown on screen.Roll mode shows the display rolling across the screen from right to left, as described in the manual. Calling the "normal" mode, "auto roll" mode as well, just seems confusing, as nothing is shown actually rolling. There's no mention of auto roll in the manual.

author: ifonlyeverything
author_rank: Regular Contributor
timestamp: December 31, 2022, 01:55:17 pm
content: Quote from: 807 on December 30, 2022, 01:39:30 pmI'm using the latest firmware on mine. Roll mode kicks in at 50 ms/div. It can be disabled (just hit the roll button to turn it off) but I don't believe there's a way to disable it going into roll mode automatically. Would be a nice option in the UI.

author: 807
author_rank: Frequent Contributor
timestamp: December 31, 2022, 02:01:24 pm
content: Quote from: ifonlyeverything on December 31, 2022, 01:55:17 pmAh right. In that case I'll stick with V6.1.37R8 for now. I would much prefer to enable it myself than to have it kick in automatically.

author: graybeard
author_rank: Frequent Contributor
timestamp: December 31, 2022, 11:18:06 pm
content: It only come on if it is turned on. If it is off it will not come on. It remembers the last state.

author: 807
author_rank: Frequent Contributor
timestamp: January 04, 2023, 11:30:35 am
content: Quote from: graybeard on December 31, 2022, 11:18:06 pmSo the same as in firmware R8 then.I'll update my firmware from R8 to R9 today.

author: BillyO
author_rank: Super Contributor
timestamp: January 04, 2023, 01:39:36 pm
content: Seems the OP is MIA.