Author Topic: DG1022Z - any user experience with this?  (Read 2040 times)

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Online bd139

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DG1022Z - any user experience with this?
« on: August 05, 2017, 02:48:48 AM »
So I just bought a DS1054Z scope which is spot on the mark for what I need. Now the karma fairy just dropped a cheque on me this morning for all the charges and interest charged by Barclays in the last 10 years (woohoo!) leaving me with enough cash for a new meter and an arb gen. I know what meter I'm going for, an 87V when one turns up on ebay new in box (seems to be a weekly occurrence), but with the arb I have ZERO experience with them.

I need to gen <20MHz (basically 40m, 20m carriers at 7/14MHz) with AM modulation (up to 100% mod depth) at a known power level in dBm into 50 ohms and do the usual generic function sub 2MHz generator stuff. I'm going to knock up a log power detector with an AD8317 in a Pomona box and would like to be able to sweep RF filters with it if possible.

Now the DG1022Z does just what I need on paper for the price I want to pay by the looks. The question is, does anyone have any experience with these and if they do, are my expectations realistic?
 

Offline 2N3055

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Re: DG1022Z - any user experience with this?
« Reply #1 on: August 05, 2017, 08:33:20 AM »
I have  DG1032Z, which is 30MHz version with 8MB AWG memory..
It is working perfectly so far, and is much more that what you said you need...
It also have quite good counter to 200MHz..

All in all, I really like mine..
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #2 on: August 05, 2017, 08:37:56 AM »
Thanks for the feedback - much appreciated :)
 

Offline rf-loop

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Re: DG1022Z - any user experience with this?
« Reply #3 on: August 05, 2017, 03:52:05 PM »
Pulse
Quote
Pulse Width ?16 ns  (limited by the current frequency setting)
Quote
Duty Cycle 0.001% to 99.999% (limited by the current frequency setting)

Quote
(Rising/Falling Edge ?10 ns limited by the current frequency setting and pulse width setting

This is why Siglent long time ago developed EasyPulse technology what jumps over this kind of severe limits.

Take 10s wide pulse and set its rise and fall time with example 0.1ns or 1ns steps starting from model dependent minimum pulse width
Set example 20ns pulse width and frequency 0,01Hz and adjust pulse risetime first example 10ns and then try 10.1ns or 15ns depending what you need. Of course minimum pulse width and fastest risetimes depends generator model - frequency band.

But about this name "EasyPulse" ---  what they think when they find this name for this developed system. This name is like some crap toy name. Who can imagine from this name that there is something really good and big advantage in pulse generating system.
« Last Edit: August 06, 2017, 01:31:46 AM by rf-loop »
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
 

Offline alm

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Re: DG1022Z - any user experience with this?
« Reply #4 on: August 05, 2017, 08:45:34 PM »
And as far as I can see, they published zero technical information about EasyPulse. How about the marketing people spend time writing a white paper instead of coming up with bullshit names that most engineers will ignore? When I see Siglent SDGxxxx, 40 MHz AWG with EasyPulse and TruArb, my mind does not even register those last words.
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #5 on: August 05, 2017, 09:11:21 PM »
Marketing bollocks I expect. Really just want sane specification sheets.
 

Offline rf-loop

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Re: DG1022Z - any user experience with this?
« Reply #6 on: August 06, 2017, 03:06:35 AM »
Marketing bollocks I expect. Really just want sane specification sheets.

This is marketing bollock.

I need 50ns pulse every 1 second. Pulse need have 25ns rise time and 15ns fall time.

Using Siglent just easy piece of bisquit.

How about DS1000Z

I think here is some peoples who have DS1000Z series generator. Please...
And also perhaps you can then add 1 or 2 ns pulse width because I  need  also this in my DUT  testing, then also set risetime from 25 to 21ns with small steps.  It is nice to hear if EasyPulse is just only some marketing bollock or do it relly give some advantages.


« Last Edit: August 06, 2017, 03:11:38 AM by rf-loop »
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
 

Offline 2N3055

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Re: DG1022Z - any user experience with this?
« Reply #7 on: August 06, 2017, 03:30:38 AM »
When I bought my DG1032Z, SDG1000X wasn't released yet.. X series gens from Siglent seem to have specialized square wave and pulse circuit inside, that makes them better to serve as pulse generators... As a general purpose AWG, DG1000Z is very good..

If you need and use pulse generator a lot and need to generate pulses he is talking about, I agree with rf-loop that SDG1000X series might be worth a look..

Also there is a question of interoperability. On more than one occasion I captured waveform with Rigol scope and via direct connection on USB downloaded it to AWG for instant replay.  That is very handy for sensor simulation for instance...

So everyone has to decide what they do and choose best tool for the job.  rf-loop correctly pointed out something good to know...
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #8 on: August 06, 2017, 04:00:00 AM »
Capture/replay is one use case I saw. I am not too bothered about pulse generation myself.
 

Offline Dwaine

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Re: DG1022Z - any user experience with this?
« Reply #9 on: August 06, 2017, 04:34:20 AM »
The Siglent 2000 series wins hands down.  Much better specs than the Rigol.  Both units are better than nothing. For bang for buck. Siglent
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #10 on: August 06, 2017, 04:51:44 AM »
40% more cash.
 

Offline 2N3055

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Re: DG1022Z - any user experience with this?
« Reply #11 on: August 06, 2017, 04:59:20 AM »
The Siglent 2000 series wins hands down.  Much better specs than the Rigol.  Both units are better than nothing. For bang for buck. Siglent

He asked about DG1022Z.  I spoke about my good experience owning similar model.

SDG2042X is clearly better unit. For 40% higher price..
And it is his decision to see whether he is prepared to give 160€ for a better unit. Or he might be good enough with cheaper one. Which is also very good for what it is.

If I were to buy my DG1032Z now, I would probably look very seriously into Siglent SDG2042X. But that's me.

 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #12 on: August 06, 2017, 05:20:54 AM »
I'm starting at spec and working back through use cases. Also the Rigol distributor in the UK is pretty damn excellent. Siglent may win if they win on my spreadsheet. Cost is a major differentiator. This isn't being used in a professional lab environment and has to get past the purchasing department (wife).

One thing I'm after is testing HF band mixers. I assume these can kick out max frequency on both channels? For example typical use case for 40m would be 7030KHz on chan 1 at 10dBm and 7031KHz on chan 2 at say -40dBm? Looks like they can span -48dBm to 18dBm power output in RF terms.

This is replacing a rather horrible bit of kit I made when I was 15 which has always been a bit shit.
 

Offline 2N3055

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Re: DG1022Z - any user experience with this?
« Reply #13 on: August 06, 2017, 07:12:38 AM »
I'm starting at spec and working back through use cases. Also the Rigol distributor in the UK is pretty damn excellent. Siglent may win if they win on my spreadsheet. Cost is a major differentiator. This isn't being used in a professional lab environment and has to get past the purchasing department (wife).

One thing I'm after is testing HF band mixers. I assume these can kick out max frequency on both channels? For example typical use case for 40m would be 7030KHz on chan 1 at 10dBm and 7031KHz on chan 2 at say -40dBm? Looks like they can span -48dBm to 18dBm power output in RF terms.

This is replacing a rather horrible bit of kit I made when I was 15 which has always been a bit shit.

Yes, both channels are fully featured and separate... Also your levels sound about right... Distortion is quite low, sinewave is clean..
 

Offline netdudeuk

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Re: DG1022Z - any user experience with this?
« Reply #14 on: August 06, 2017, 07:21:24 AM »
As it happens, I came across this yesterday



I'll leave you to decide how objective the comparison is.
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #15 on: August 06, 2017, 07:42:15 AM »
Thanks both.

Looks relatively objective actually. The Rigol seems to use interpolation which looks like it kills a chunk of noise and possibly phase noise. Not sure how that compares to more recent Siglent generators (yet - I have to add them to my list).

DG1022Z is way ahead at the moment. 16 points to 9 on the siglent on my spreadsheet.

Definitely going to have to buy an SA as well (I may have GAS here). Purchase decision will be on Monday.

Counter on separate channel is a really big plus for me looking at use cases. 40MHz on the SDG2042X would be nice to cover the entire HF spectrum but I don't go near 10m!  It is however inside the 36MHz boundary for two frequency doublings to 2m. Decisions decisions!
« Last Edit: August 06, 2017, 07:46:19 AM by bd139 »
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #16 on: August 09, 2017, 09:09:24 AM »
And I bought the DG1022Z... let's see if it's shit or not :D
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #17 on: August 10, 2017, 09:22:06 PM »
It arrived



Initial impressions (only had 30 minutes play time):

1. Interface is very intuitive.
2. Power in dBm to known load impedance works nicely. Have tested it into an inline 50R terminator and the scope is reading 2.00v for 10dBm
3. Not as loud as my DS1054Z which is good.
4. AM mod works nicely and is easy to use. I plugged a mic amp straight into the ext mod and I can mod that no problems!
5. Came in two cardboard boxes so I've got something to send it's predecessor in :D
« Last Edit: August 10, 2017, 09:25:19 PM by bd139 »
 

Offline Rbastler

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Re: DG1022Z - any user experience with this?
« Reply #18 on: August 10, 2017, 10:16:00 PM »
Good to hear that! I want to get myself one too, sine tlmy SDG1025 pissed me off. The interface sucks quite a bit(and no lan).
How easy (how hidden are these options) is it to acess the counter on the DG1022Z and to sync both channels ?

Edit: typo
« Last Edit: August 10, 2017, 10:17:31 PM by Rbastler »

http://rbastlerblog.jimdo.com/
-1kV PMT supply: Check
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #19 on: August 10, 2017, 10:20:23 PM »
Counter is just whack one button and you're done. You can phase offset in one key press and then use the encoder. To "copy" from one channel to another is two key presses. It's really nicely designed I think.
 

Offline Rbastler

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Re: DG1022Z - any user experience with this?
« Reply #20 on: August 10, 2017, 10:26:30 PM »
Thx!
This is much better than the siglent. A lot easier to operate. Cant wait to get one.

Sent from my A0001 using Tapatalk


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-1kV PMT supply: Check
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #21 on: August 10, 2017, 11:12:57 PM »
Indeed. Reading the Siglent and Rigol manuals side to side put me right off the Siglent.
 

Offline rf-loop

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Re: DG1022Z - any user experience with this?
« Reply #22 on: August 11, 2017, 01:21:22 AM »
Indeed. Reading the Siglent and Rigol manuals side to side put me right off the Siglent.

I am interest to see can you generate 1 second period (1Hz) 288 ns width pulse so that risetime is set example 30ns.  After then please change pulse width to 196ns and change risetime to 48ns.
What is 10Hz square wave rise time?  How about pulse period 200ms  with 50% duty. Risetime, as fast as possible. What is risetime?
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #23 on: August 11, 2017, 01:32:50 AM »
Will see what I can do.

I knocked up a quick test. I can generate 288ns wide pulses at 1KHz with 30ns rise time no problems. I can't slow them down to 1Hz though as the sample depth isn't there. I can use burst mode however but I don't know how to use that yet ;)

I'll get back to you with some numbers and scope traces :)
 

Online bd139

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Re: DG1022Z - any user experience with this?
« Reply #24 on: August 11, 2017, 02:05:52 AM »
Here you go. Took me longer to find my USB stick than it did to work it out...

Case 1: 288ns at 1Hz, rise time 30ns.

1. Set channel 1 to pulse mode
2. set 576ns as pulse width (this covers both high and low states so 288ns x2) pulse width and amplitude (I'm using 5v p-p)
3. set "leading" to 30ns.
4. Turn on burst mode and set burst to 1s, repeat to once.

Scope reports 287ns, 31ns rise time:



Case 2: 196ns at 1Hz, rise time 48ns.

1. Set channel 1 to pulse mode.
2. Set 392ns as pulse width (this covers both high and low states so 196ns x2) pulse width and amplitude (I'm using 5v p-p)
3. set leading to 48ns.
4. turn on burst mode and set burst to 1s, repeat to once.

Scope reports: 197ns at 1Hz, rise time 49ns



Case 3: 200ms period, 50% duty cycle. Fastest rise time:

1. Set channel 1 to pulse
2. Set 200ms period
3. 50% already set
4. Set leading and trailing to 10ns (lowest setting).

Scope reports, after some dicking around with triggers and memory depth 13ns rise time. Period and frequency are correct (not depicted):



Generator is capable of 25MHz which corresponds to a rise time of 14ns so it's spot on spec. More expensive ones have better rise times I suspect.

Big  :-+

Edit: this is sooooo easy to use. I haven't even read the manual cover to cover yet, just the getting started guide and the spec sheet.
 
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