Function generator - Page 1
Forum section: electronics / general

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: January 22, 2017, 01:12:08 pm
content: Hello!I have finally build my laboratory...but i don't have a function generator, i have saw some bk precison like 4011 and some gw insteack i am looking for a 5mhz, my budget is 150€ can you help me?Sorry for my englishBest regards!Nia

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: January 22, 2017, 04:38:12 pm
content: Up plese

author: rdl
author_rank: Super Contributor
timestamp: January 22, 2017, 09:18:33 pm
content: You could buy one of those cheap DDS types or one of the XR2206 based kits until you have a better idea of what you need.

author: nctnico
author_rank: Super Contributor
timestamp: January 22, 2017, 11:18:48 pm
content: The Feeltech 3200S series isn't a waste of money.

author: bazsa56
author_rank: Contributor
timestamp: January 23, 2017, 10:15:31 am
content: +1 for the feeltech.Have the 24MHz for 1+ year, very happy with it for the price.

author: JoeN
author_rank: Frequent Contributor
timestamp: January 23, 2017, 10:30:56 am
content: Quote from: rdl on January 22, 2017, 09:18:33 pmThose kits are fun to build but really they are not a precision signal generator. To get the signal where you want it to be, you have to put it into a scope first and dial it in. Not exactly the quality you get out of a real function generator where you can just set the signal type, frequency, offset, and swing and know it's going to work.

author: Nystemy
author_rank: Contributor
timestamp: January 24, 2017, 11:34:03 pm
content: I have been using a FY3224S myself for some time, and it is rather good for the money.And they aren't too expensive, here is a link to an Ebay listing:http://www.ebay.com/itm/FY3224S-24Mhz-Dual-ch-DDS-Function-Arbitrary-Waveform-Signal-Generator-sweep-/121478483178?hash=item1c48ae8ceaThis would be my recommendation as a first signal generator for general use.It has decent performance, and can generate decent looking square, triangle, etc waves at 2MHz, sine waves up to 24MHz, and if you really need a square wave, then you can always buffer the sine wave through a Schmitt triggered inverter. It also has arbitrary functions, but I haven't played around with that myself though, so I have no clue if it is any good. Best performance is expected under 1 MHz. Though, it doesn't like driving large loads, so it only has a few tens of milliamps worth of power.Secondly, it has a universal counter in it too, and it can measure frequencies from a few hertz, to 100MHz, and the counter seams to not have a problem counting real short events. (I have only tested it with 10ns pulses at arbitrary spacing, generated by a digital signal generator.)Internal build quality is really nice, and were actually surprising me when I first opened it. Though, putting in a lead weight could be considered an upgrade as it weighs almost nothing, and the case feels rather cheep.

author: John B
author_rank: Frequent Contributor
timestamp: January 25, 2017, 01:09:17 am
content: With the FY3224S and its variants, how are the waveforms at voltages in the range of a few hundred mV, and low frequency up to about 50khz? The videos on youtube seem to imply they have quite a bit of stair stepping in the waveform.

author: Nystemy
author_rank: Contributor
timestamp: January 25, 2017, 01:24:34 am
content: Quote from: John B on January 25, 2017, 01:09:17 amTo solve this problem one can always use an opamp as a buffer, and a resistiv ladder to lower the voltage. It is cheap, and one probably has the parts around.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: January 31, 2017, 10:21:46 pm
content: Thaks at allI think Ill get a basic Rigol waveform generator, I work with Radio signal and other stuff like this for example amplifier, and I don't know properly what I need, I thought at a basic Rigol or a Basic Siglent function generator, but if you can help me ill apreciate it(I don't know if a chinese function generator is usefull for me)

author: rstofer
author_rank: Super Contributor
timestamp: January 31, 2017, 11:12:59 pm
content: Quote from: NiaDebesis on January 31, 2017, 10:21:46 pmI had thought I wanted to get up to around 160 MHz so I was looking at the Rigol DG4162 $1250 but then again, the Siglent SDG5162 looks pretty nice at $1192.https://www.amazon.com/Rigol-DG4162-Arbitrary-Waveform-Generator/dp/B00EPFCLVMhttps://www.amazon.com/Siglent-SDG5162-Function-Arbitrary-Generator/dp/B00EE18XQYI haven't made up my mind and I don't really have a need so I bought the cheap FG085 kit just to have something laying around.https://www.sparkfun.com/products/11394I also have the Digilent Analog Discovery which is a much better Arbitrary Waveform Generator but it is limited in frequency. I suppose I will eventually buy either the Rigol or the Siglent but I may back off on the frequency.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: February 06, 2017, 01:14:38 pm
content: Siglent SDG1025 any review about this?

author: Vtile
author_rank: Super Contributor
timestamp: February 06, 2017, 01:40:54 pm
content: Quote from: NiaDebesis on January 31, 2017, 10:21:46 pmIf you are on for radio frequenzies and a like, you might get more answer on that field if you go tohttps://www.eevblog.com/forum/rf-microwave/knocking the doors??

author: james_s
author_rank: Super Contributor
timestamp: February 06, 2017, 08:35:11 pm
content: It really depends on what you want to do. I have an old 2MHz function generator I bought used more than 15 years ago and it still serves me well for what I use it for. If you need higher frequencies then something like this will not do but you don't have to spend a lot of money if your needs are simple.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: February 07, 2017, 11:34:55 am
content: I have only to test amplifiers, i don' t need lot of Hz fir thiss 25mhz is a looot but an arb is still mecesseraly, i have checked for siglent 1025/810 but is worth? i have erared that is cheap quality, idon' t know if is true, if they aren' t worth ill wait and get the 1022Z from rigol with the upgrade to 16M for the memory