Uni-T UTG 1022X-PA Wavegenerator - First impressions - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: September 15, 2024, 04:57:05 pm
content: I just got this wavegen, and i thought some might be interested learning about it. Havent done much testing, but if you want to know / test something, just tell me.The knob has rubber which is good. It does though skip steps if you turn it to fast, but its much better as the rigol DG800 or Siglent SDG1000X. The current selection is not easy to see, though.Frequency sometimes change from like 100.000mHz to 1mHz when decrementing the first digit, differing in the behaviour when decrementing at other values.Color of channel 1 has yellow curve, but is red anywhere else.Knob changes selection of values in unusual way. (Turning right changes selection upwards).Lower limit is exceeded, when inverting the signal.Noise waveform exceeds limit 3V and 0V with about 0.4V! Also exceeds lower limits when switching from DC to any other waveform (-1.6V).Lower limit is exceeded, when offset is near 0V, amplitude is near 0V, and when amplitude is changed to 3V (offset is automatically changed to 1.5V)(0V offset _ 0V amplitude to 1.5V offset _ 3V amplitude.png).This problem occurs also when switching off the channel while changing the setting. The exceedence is less in this case.Starttime 12 seconds.Some settings were not saved: load and amp limit of channel 2, waveforms...No presets!When changing offset, amplitude is automatically changed, when limit has to be enforced.When returning from Utility CH1 settings, and going into CH2 setting, the last page is still selected, which was last selected in CH1.When in utility settings of channel, its not visible which channel settings are choosen.Software version is not fully shown. *facepalm*Upgrade does not work with every USB-Stick.There is a dialog, with a choice, but only chinese letters, that appeares after the upgrade. It asks for the upgrade again.Arbritrary wave was wrong after switching off and activating again.

author: eTobey
author_rank: Super Contributor
timestamp: September 15, 2024, 04:58:02 pm
content: more pictures

author: Aldo22
author_rank: Super Contributor
timestamp: September 16, 2024, 09:37:48 am
content: Why do these relatively expensive, dedicated AWGs often have such a poor rise time?A fast rise time and short, precise pulses are actually quite useful for testing things?

author: DaneLaw
author_rank: Frequent Contributor
timestamp: September 16, 2024, 04:13:29 pm
content: Quote from: Aldo22 on September 16, 2024, 09:37:48 amHow fast do you want it.?ain't some of these entry models risetime down around 2 to 3ns .Though OPs UTG1022X, seems on paper to be up around 16ns.https://static.eleshop.nl/mage/media/downloads/UNI-TUTG1000Xdatasheet.pdf

author: tszaboo
author_rank: Super Contributor
timestamp: September 16, 2024, 04:23:03 pm
content: Quote from: Aldo22 on September 16, 2024, 09:37:48 amBecause this is an AWG not a square wave generator. It's designed to make waves with the limited frequency content written on it's datasheet, 20 or 40MHz in this case.Fast rise time has very high frequency harmonics.OP, what does this this power amplifier in this do?

author: Aldo22
author_rank: Super Contributor
timestamp: September 16, 2024, 04:44:44 pm
content: Quote from: DaneLaw on September 16, 2024, 04:13:29 pmI'm just wondering why these dedicated AWGs are worse in this point than the built-in AWG in my $130 scope, for example.Are there technical reasons for this?Quote from: DaneLaw on September 16, 2024, 04:13:29 pmWhich models would that be?

author: eTobey
author_rank: Super Contributor
timestamp: September 16, 2024, 07:10:57 pm
content: Did you read the picture names? I guess you are refering to "Risetime 1.5V PA output Arbritrary.png"? This is the Power output of the back (4W). Yes it does not have awesome values, but for 4 W this might be OK? I would be satisfied with 2W, and some better values, too.They have characterized the PA output with 1 μHz～100 kHz, which matches with my measures.

author: Aldo22
author_rank: Super Contributor
timestamp: September 16, 2024, 08:03:34 pm
content: Quote from: eTobey on September 16, 2024, 07:10:57 pmNo, I don't know what that is.In any case, 810ns rt is very slow.I wonder why these dedicated AWGs in the middle price range are not better in this discipline.I have an FY3200, which is about the cheapest 2 channel standalone AWG on the market ($40-50).This one has a rise time of<20ns.The UTG1022X-PA costs about 300€ and has a very comparable value of<16ns.The AWG built into the DSO2000, which you can also get “for free” (hack), has<5ns, as you can see in the picture above. This means that even a 20ns pulse has 10ns where it's "high".I just wonder why more expensive is not better here.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: September 16, 2024, 09:46:57 pm
content: Quote from: Aldo22 on September 16, 2024, 04:44:44 pmfxRigol entry signal gens. (DG821PRO 250€ + VAT)https://static.eleshop.nl/mage/media/downloads/DG800Pro_DataSheet_EN.pdf//

author: Aldo22
author_rank: Super Contributor
timestamp: September 16, 2024, 10:11:34 pm
content: Quote from: DaneLaw on September 16, 2024, 09:46:57 pmThank you!Yes, these are about the values I would expect from a somewhat better/more expensive AWGQuote from: DG800Pro DataSheet

author: eTobey
author_rank: Super Contributor
timestamp: September 17, 2024, 12:04:18 pm
content: One thing this 1022 has, that the 960 does not have, is the burst mode. But the burst modedoes not work correctlyis unusable in my use case, because of a bug.. I can setup internal trigger seemingly OK, but with external trigger in Ncycle-mode it goes on forever...That thing is definatly going back.

author: eTobey
author_rank: Super Contributor
timestamp: September 21, 2024, 07:42:17 am
content: Another thing i found out which is quite stupid:When the screen is off (is a screensaver really needed?), the channel buttons slowly fade on and off. So if you would have a quick look, if the channels are on, then you would be fooled, potentially resulting in destroying somethings.

author: eTobey
author_rank: Super Contributor
timestamp: September 26, 2024, 01:00:29 pm
content: Went to use the "Counter", as it is called in the menu. Couldnt find an item that would imply it would count something.I only found "Freq", "Period" and "Duty".