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| I pulled the trigger on a Siglent SDG-1032X. A few questions |
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| VolvoBrad007:
Okay, First off, thank you guys for all your help!!!!! So I pulled the trigger on the Siglent SDG1032X! (30 MHz, 2CH) (and two BNC to minigrabber leads, and two BNC to alligator leads) for 373.56. Seems like a pretty good deal to me considering the unit itself retails for 400! Let me know what you guys think please! (The good, the bad, anything is welcome!) This is a follow up thread to an earlier thread I posted about which function generator to purchase, if you'd like to catch up there, there was some discussion, as well as a whole blurb about myself, knowledge, tools and what my intentions for the function generator are. I re-posted it here so that I could get a wider viewing audience, seeing that I have a different set of questions now that I have chosen a unit. That can be found here: https://www.eevblog.com/forum/testgear/building-my-electronics-lab-need-help-choosing-a-function-generator-please-)/ Also had another question regarding the SDG1032X, I couldn't find any spec as to the protection of the device, as far as short circuit protection goes. It says in the 800 data sheet "Protection: Short Circuit Protection". I'm wondering how the 1032X deals with short circuit protection. I ask, because I'm new to the function generator, and certainly do not want to blow the bloody thing up by accident, as you can with your oscilloscope probes and ground leads if you connect them willy nilly and don't understand what mains earth referenced means! I'm also asking for the same reasons as for the reason I do not want to use my iphone or android tablet as a function generator (besides it's obvious faults, limitations etc.); because I want to avoid blowing up my iphone (well maybe not literally, but applying my probe to the wrong place in the circuit, or an improperly wired circuit could easily spell disaster as voltage/current finds its way into my headphone jack on my phone. (and yes, I am aware that you can build a protection circuit for your phone, or I think I may have been reading that, can't relocate that information at the moment, could also be a figment of my imagination lol, though it is up on my whiteboard some diagram about a resistor or capacitor in parallel with signal and ground in a TS phono plug. So same thing goes for the function generator. Any tips/advice on how to keep it safe or how a bench function generator is "safer" to use in terms of damaging the equipment. Is it more forgiving? Is there short circuit protection in case I'm a ding dong (we all have our "oops" moments, even the best of us) and hook it up wrong in the circuit? I am pretty excited for it to arrive and have a good play with it, learn it, smell it (ahhhhh, that new electronics smell, gotta take it in and love it! :)). Hoping I made a good decision, using all of your guys' awesome help and direction, and reading posts here (though seemed to be a bit limited in the 1000X thread) to point me in and some of my own research to finally narrow it down (as well as we always have to take into account the dollar amount spent). It seems to be a decent upgrade from the original 805/810 I was originally looking at. Two channels, and 30 MHz! (and a true 2 channels at that!) I've never owned one, or used one before, but as I stated in my original post, I'm looking for a unit I can grow into, and I'm eager to learn and apply; and as I read in my EE textbooks that I have and download EE labs from different universities from the internet, many involve signal generators as well as arbitrary wave generators. So it looks like it got both in one package with the SDG1032X (please, correct me if I'm wrong here), and a true 2 channels, or so I read from the data sheets after much contemplation and comparison of different models and different companies, as well taking into account the wealth of knowledge on here! Comments are more than welcome! As well as any suggestions as to test leads/adapters I may need to purchase in addition to make sure I have what I need to make everything go! Here's what I have in terms of test leads for the oscilloscope. I bought an accessory kit from Tequpment.net when I bought the Rigol DS1054Z. Here it is: http://www.tequipment.net/Cal-Test/CT4042/?v=0 Hopefully that can help as to what I may already have. I have additional banana to minigrabber and alligator, any other suggestions? (Also keep in mind that I'm a ham, so I may have 50ohm stuff here already (adapters and coax), but would still appreciate advice if certain lengths need to be used, are there oscilloscope grade adapters? coax/cables? connectors? and any other relevant information or materials needed/necessary would be super super awesome and helpful! So that I can get the most out of my learning journey :) Also how does the HI-Z and 50ohm relate in electronics world? I know how it relates when I'm plugging in a HI-Z microphone into my preamp or HI-Z instrument outputs. As Z is impedance. What is the purpose of the through 50ohm adapter that's in that kit? Is it the same thing as a 50 ohm terminator? Or should I have these around as well? This may be a stupid question to ask, but I've been told and always say that the only stupid question is the one you don't ask, so here goes: is spending 400 (well it would have been 400 if not for the sale and discount) on a signal/waveform generator excessive if my scope only costs 400? (I'm not saying these things have a direct link, but am curious if that's just silly). Tautech did recommend I expand my budget, to get what I was asking for in my initial post. Which I'm not opposed to or against if it's a piece of test equipment I can grow into. Not bottom of the barrel, and from a reliable, well liked and much used company by those on the EEVBlog forums, as there seems to be a ton of good people and heaps of information here. You just have to have the time to read it all! Lol! One more stupid one, who is Siglent? Are they a decent company? I can read the about us stuff, but any opinions? Maybe where they rank in the whole scheme of things? (I'm kind of new to all this fascinating measurement technology, so again, I really appreciate any input!) I can, for instance, definitely grow into the Rigol, as I am new to the DSO, and have much to learn still about them. (as well as the oscilloscope in general) Just curious if that seems excessive. Obviously there are reasons why one would choose one function generator over the other, I just would like a little nudge I did or didn't go out of bounds so to speak. I appreciate any and all feedback, as long as it's not ignorant. I think you guys provided me with sufficient information for me to make an informed decision; but it never hurts to check. One helpful chap mentioned that 2 channels is helpful even in simple circuits. Could someone possibly and kindly provide another example? (I understand you can then drive two different things with two different frequencies or the same frequency, or whatever you want, but a real life example. Not just that you can use two channels to hook up to whatever you want to, obviously lol. As well any links or suggestions to some basic circuits I can experiment around with using the function generator. As well as maybe an experiment or two or link or two using the arbitrary wave generator function. I have also heard that this can be a useful tool for learning the oscilloscope. Any truth to the matter? Maybe some examples or links or a smoke signal? ;) I will definitely post some pics and some thoughts on the unit when it arrives! Thank you all again, I sincerely appreciate all your help and suggestions, comments, links, pictures, youtube videos. All awesome stuff! -Brad |
| MrWolf:
--- Quote from: VolvoBrad007 on December 05, 2016, 05:24:02 pm ---Also how does the HI-Z and 50ohm relate in electronics world? I know how it relates when I'm plugging in a HI-Z microphone into my preamp or HI-Z instrument outputs. As Z is impedance. What is the purpose of the through 50ohm adapter that's in that kit? Is it the same thing as a 50 ohm terminator? Or should I have these around as well? --- End quote --- It is sort of equivalent to BNC T + regular 50 ohm terminator, which gives better flexibility, but usually worse fidelity signal (more mechanical connections etc). If you want to measure signal gen directly with your scope that does not have built-in 50 ohm termination you have only two "foolproof" options: 1) enable HiZ on gen, stick special scope probe BNC adaptor to gen output, scope probe directly to that (in 10X mode!) https://www.google.ee/search?q=probe+bnc+adapter 2) enable 50 ohm on gen. Take 50 ohm cable from gen to pass thru term to scope (scope to 1X mode, pass-thru attached to scope!). Anyway above 1MHz or so it's ALL about impedances and matching. Everything will reflect and arrive not in time it was sent :P Could watch some of his stuff: https://www.youtube.com/user/w2aew/videos |
| VolvoBrad007:
--- Quote from: MrWolf on December 05, 2016, 05:52:08 pm --- --- Quote from: VolvoBrad007 on December 05, 2016, 05:24:02 pm ---Also how does the HI-Z and 50ohm relate in electronics world? I know how it relates when I'm plugging in a HI-Z microphone into my preamp or HI-Z instrument outputs. As Z is impedance. What is the purpose of the through 50ohm adapter that's in that kit? Is it the same thing as a 50 ohm terminator? Or should I have these around as well? --- End quote --- It is sort of equivalent to BNC T + regular 50 ohm terminator, which gives better flexibility, but usually worse fidelity signal (more mechanical connections etc). If you want to measure signal gen directly with your scope that does not have built-in 50 ohm termination you have only two "foolproof" options: 1) enable HiZ on gen, stick special scope probe BNC adaptor to gen output, scope probe directly to that (in 10X mode!) https://www.google.ee/search?q=probe+bnc+adapter 2) enable 50 ohm on gen. Take 50 ohm cable from gen to pass thru term to scope (scope to 1X mode, pass-thru attached to scope!). Anyway above 1MHz or so it's ALL about impedances and matching. Everything will reflect and arrive not in time it was sent :P Could watch some of his stuff: https://www.youtube.com/user/w2aew/videos --- End quote --- Thanks Mr. Wolf! Good stuff there. I have already seen this video, and he pauses and gives you a moment to pick the problem out and that was my thought, impedence mismatch. So he stuck the BNC T with a 50ohm terminator on it, and bam, Bob's your uncle! I have watched some of w2aew's videos and will be checking out more. It looked like he had some good stuff on there. So if I understand correctly, the music matching is simply the same applied here. They're all electronics, and in order for them to play nicely with each other, impedences must be matched, in the music world to some degree, otherwise you get degradation of the signal, etc.. With studio equipment, there's usually an acceptable range in the spec sheet, especially on a mixing board. And the fact that the DS1054Z does't have a 50 ohm mode, has no effect on what we're talking about here? Or do I have that mixed up? As I understand it, 50 ohm mode (on the scope) is just enabling a 50 ohm internal resistor (inside the scope) to be put into the circuit. -Brad |
| tautech:
Siglent sig gens have short circuit protection. What you need be careful about is connection to a part of a circuit where there are existing voltages that might damage the output stages of ANY sig gen. Easy to check with a DMM. ;) |
| VolvoBrad007:
--- Quote from: tautech on December 05, 2016, 06:35:17 pm ---Siglent sig gens have short circuit protection. What you need be careful about is connection to a part of a circuit where there are existing voltages that might damage the output stages of ANY sig gen. Easy to check with a DMM. ;) --- End quote --- Good information again tautech! I will definitely write that one down for sure! Cheers for the good info! -Brad |
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