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| SIGLENT SDS1102CML - First Impressions |
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| hgg:
Hello, I received today my first oscilloscope and I am really excited! :) Its a really nice tool. The quality of its construction is quite good actually. The plastics feel nice, and do not have any annoying smell. The knobs are very good, except the small ones that could have been a bit more solid. photo hosting I had no problem with the layout of the knobs apart from the general purpose (intensity/adjust) that is too close to the big vertical Volts dial. They had so much space above it, but they decided to put it as close as they could to the vertical... Go figure... how to take screenshots The big knobs feel very nice indeed and I love that they all have a push to center function. It would have been a lot better design if all the knobs were the same as they big ones! All the little rubber buttons are great, they have a positive feel and they are very well lit. The On/Off switch is very springy and quite hard to press. how to print screen on pc All the connectors, USB, BNC, etc feel solid. Very nice. how to do a screen shot The display is very crisp and has excellent viewing angles. You can see the pixels, so in the same space they could have used a higher resolution one. The display is for bench use only because it goes dark fast if you look at it from below the horizontal. From any other angle its excellent! I have not yet removed the protective cover from the screen but it looks like that the lcd is protected with a glass. Very nice. The little plastic feet work fine. When they are closed, the unit feels like that will fall on its face because its a bit heavy in front. So, you should use it all the time with the plastic feet extended. The probes feel a little cheap and fragile and this is probably because they are... :) Having said that, I did not have any problems with them all day today. Maybe they will show their quality in the Mhz range. They were calibrated very easily. image hosting 12mb Some measurements. - Power Consumption : 18.7 Watts - Temperature : from 23 degrees Celcius ambient to 34 degrees after one hour of use. The hottest part is the right side. - Time to boot : 9 seconds. - Time to Auto trigget its own signal : 5 seconds. It can become much slower with different signals. - You can hear a relay clicking when you change from 200mV to 500mV and from 50ns to 100ns - Software Version : 5.01.02.13 - Hardware Version : 11-62-3.3 - Sound Noise : Its a very quiet oscilloscope! My house is very quite. From a background noise floor of 34.3dbC it goes to 49.6dbC 20cm from the actual fan. One negative thing I found in the few hours I've played with it is that if you switch it off and then on with a USB stick plugged in, it will not recognize it until you unplug it and plug it again. Very annoying! I think that this should be fixed in the next firmware version. Other negative is that when you turn the vertical and horizontal dials, the indicator lines are lagging. They are not instant and the waveform takes some time to be displayed again. Definitely something that needs to be fixed. Some screen captures of different signals: Its own 1kHz signal: image hosting over 10mb Several PWM ones: image upload no ads image url upload image uploading site how to make screen shot image hosting 10mb limit image hosting no account Bellow you can see a very nice sinewave with the probes not connected to anything... 50Hz, so its picking the mains frequency somehow. Do you know how can I prevent this? When I moved it to a different room it stopped. upload photos Now if I switch on the main light of the room I get the following signal. Its not like that actually, because if I turn on 5sec persistence I can see two different 50hz signals. I can also see spikes when I turn on & off some lights in the room. screen capture windows 7 So, these are my first impressions of the oscilloscope and I would have to say that in general they are positive. :-+ If you have any questions that I can help with, please feel free to ask. Any suggestions for testing the oscilloscope functionality are welcomed. Thank you. George. |
| Hydrawerk:
A nice basic scope. Quite similar to Rigol DS1000, but the screen and front panel is better. It even has print and single button. :-+ |
| Wuerstchenhund:
Nice review and great pictures! Saves me doing one for my Siglent SDS1102CNL (which is the same the CML minus the large 2M memory). --- Quote ---The probes feel a little cheap and fragile --- End quote --- Yes, the probes are really very cheap and flimsy, and probably won't survive long. I guess for all the money they put into the scope to make it good for that price they probably had to cut corners somewhere. But good standard probes (ie Testec) aren't that expensive so I don't think this is a major issue. Aside from the problems you already mentioned, I also found some idiocracy in their logic for the RUN/STOP and SINGLE button. If you press RUN/STOP the scope stops its acquisition cycle as expected. But if you press RUN/STOP again it only does a single sweep. You have to actually press SINGLE to get the scope going again. Maybe we should collect all the issues and then pester Siglent together for them to fix the problems. |
| rf-loop:
--- Quote from: hgg on May 15, 2013, 07:23:17 pm ---Hello, I have not yet removed the protective cover from the screen but it looks like that the lcd is protected with a glass. Very nice. The probes feel a little cheap and fragile and this is probably because they are... :) Having said that, I did not have any problems with them all day today. Maybe they will show their quality in the Mhz range. They were calibrated very easily. Other negative is that when you turn the vertical and horizontal dials, the indicator lines are lagging. They are not instant and the waveform takes some time to be displayed again. Definitely something that needs to be fixed. Bellow you can see a very nice sinewave with the probes not connected to anything... 50Hz, so its picking the mains frequency somehow. Do you know how can I prevent this? When I moved it to a different room it stopped. Now if I switch on the main light of the room I get the following signal. Its not like that actually, because if I turn on 5sec persistence I can see two different 50hz signals. I can also see spikes when I turn on & off some lights in the room. Thank you. George. --- End quote --- There is real true glass. You can take protective plastic off. Probes are cheap and not best possible mechanically (and electrically they are just as chap probe is, no complex passive compensation circuits, not high class resistive coaxial...etc)). And rotary joint to scope end BNC is not very strong construction. But freq response is quite ok, as can see one my BW test image made using probe. There is limit of processing capacity. With it need live. It is hard to make this faster. Of course if change priority of processes but then perhaps some other thing suffer. It is compromise. You see signals without connecting... just from "air"... ok, try with one meter wire as antenna... If it do not pick-up electric field signals there is something wrong - and badly. This is just normal, take what ever oscilloscope and High-Z probes. Scope input is under 20pF and 1Mohm. Probe tip with 10x is 10Mohm (with small parallel capasitance what do not mean anything with 50Hz) I'm very worry if it do not pick up these signals. Why it show 2 (or more) traces with persistence.. becouse signal have lot of variations and it trigs sometimes where ever. Just normal. |
| Wuerstchenhund:
--- Quote from: rf-loop on May 15, 2013, 08:29:19 pm ---There is limit of processing capacity. With it need live. It is hard to make this faster. Of course if change priority of processes but then perhaps some other thing suffer. It is compromise. --- End quote --- I don't think the delay between changing the time base or vertical setting and the time when the trace re-appears is a problem with processing capacity. It's much more likely that this is just a firmware bug. The scope is quite fast and this problem only occurs sometimes (at least on my CNL scope). I'm pretty sure Siglent can fix it easily in one of their next firmware releases - if they are aware of the problem, that is. |
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