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Author Topic: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown  (Read 18287 times)

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Offline EEVblog

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Offline Hydrawerk

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #1 on: November 26, 2015, 03:40:53 AM »
Amazing machines. http://www.youtube.com/user/denha (It is not me...)
 

Offline rdl

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #2 on: November 26, 2015, 05:09:53 AM »
Another decent quality piece of equipment marred by an offbeat, gimmicky, and in some ways childish, front panel design. This one is nowhere near as bad as the DS1054Z or the ridiculous DP832, but I still think they need a change of personnel in that department.
 

Offline Wisnaeme

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #3 on: November 26, 2015, 05:30:50 AM »
Looks like the video got pulled by Youtube.
Hope it's back soon.


 

Offline janekivi

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #4 on: November 26, 2015, 05:37:13 AM »
Fortunately, I saw all that "spam, scams, and commercially deceptive content" and after page reload  it was gone.
How to do politically correct teardown... : )))
 

Offline Warhawk

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #5 on: November 26, 2015, 05:41:30 AM »
Looks like the video got pulled by Youtube.
Hope it's back soon.
+1

Offline Towger

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #6 on: November 26, 2015, 05:41:52 AM »
Mojo at work again? I managed to watch it during lunch without any problems.
I have to agree about those sideways push buttons. Otherwise looks good.
 

Offline bktemp

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #7 on: November 26, 2015, 05:43:54 AM »
Is it only me or do the 3 buttons on the left side of the display look weird?
Initially I thought Dave is using some kind of fish eye lens or something is wrong with the video because the buttons looked totally distorted. But then I realized the buttons really have the odd shape and all other buttons are also unusual.
 

Offline Bud

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #8 on: November 26, 2015, 05:44:21 AM »
Yes rigol must stop commercially deceive people with their garbage products.
 

Offline homebrew

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #9 on: November 26, 2015, 05:45:58 AM »
No, I'm still not able to view the video...
 

Online PA0PBZ

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #10 on: November 26, 2015, 05:47:17 AM »
Not fair, here I am sitting with a drink and  :popcorn: ready to watch and now it's gone  :--
Keyboard error: Press F1 to continue.
 

Offline kc0ngu

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #11 on: November 26, 2015, 05:49:11 AM »
Glad I caught it during breakfast (USA Central Time) before UTube idiots got their hands on it.
Hopefully it will be back soon, maybe the Batterizer team complained  :-DD
 

Offline Mashpriborintorg

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #12 on: November 26, 2015, 05:50:02 AM »
Yeah, that" scam deceptive click stealing"  :palm: teardown was removed by Youtube... or after a Rigol claim ?  :scared:
Dave, what about the progress of the big teadown you were speaking about  ? We will not be mad at you it requires a multi-part video, if it's easier to produce and manage than a freakin' long video   :popcorn:
 

Offline rdl

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #13 on: November 26, 2015, 05:58:11 AM »
Is it only me or do the 3 buttons on the left side of the display look weird?
...

That's the part I consider "childish".
I also wonder if CBS approved the use of their logo?
 

Offline Macbeth

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #14 on: November 26, 2015, 06:00:54 AM »
Bah. I was all set to watch this on my Raspberry Pi OSMC media player on my 37" and got the "You tube removed due to spam, scams, and deceptive content" nonsense. I figured surely this is just something wrong with the EEVBlog KODI plugin, only to find it doesn't work on my PC either  :palm:

This is either the Batteriser fan club (1 member), the SJW white knight eunuch who has lost his mojo, or the german guy who made that fantastic (nearly) double sided PCB for the "medical tablet PC", the one with the Manhattan Beirut style construction.
 

Offline Macbeth

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #15 on: November 26, 2015, 06:01:59 AM »
...or Rigol themselves... but surely not, not after the Riglent fiasco?  :-DD
 

Offline ElectricGuy

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #16 on: November 26, 2015, 06:03:36 AM »
I want the video back....... Who the hell i need to phone?  :-BROKE
Thank you!
Regards
ElectricGuy
 

Offline continuo

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #17 on: November 26, 2015, 06:06:53 AM »
Why was it pulled?  :-//
 

Offline ElectricGuy

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #18 on: November 26, 2015, 06:08:51 AM »
Why was it pulled?  :-//

Probably someone reported!!!!
Thank you!
Regards
ElectricGuy
 

Offline rdl

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #19 on: November 26, 2015, 06:10:25 AM »
I'd be surprised if it was pulled because of Rigol. I was busy with other things so I didn't see every minute, but it seemed to be overall a very favorable review.
 

Offline G0HZU

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #20 on: November 26, 2015, 06:12:08 AM »
I fast forwarded to the RF bit and I can add a couple of clarifications if that helps?

I saw the section covering the output stage and the part that Dave referred to as a possible attenuator is an amplifier. It looks to me like it's a wideband GaN part that uses a lot of D-G negative feedback to flatten the gain over the required bandwidth.

So I suspect that this amp gets switched in for high signal levels. In this application it's probably run at a lower drain voltage to make it more robust but I'd question the use of the feedback network in terms of its impact on stability. If I had one of these generators here, the first thing I'd be doing is to see if this amplifier can be made to go unstable into certain loads on the sig gen output.
The row of chips that have the tops ground off will make up the output step attenuator.

I saw the whole PCB and based on this initial glance I suspect that there may be little difference between the 3GHz version and the 1.5GHz version. Maybe just a doubler or an extra VCO range gets used here. Maybe this section is missing and/or crippled in firmware on the 1.5GHz version?



« Last Edit: November 26, 2015, 08:31:16 AM by G0HZU »
 

Offline number33

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #21 on: November 26, 2015, 06:41:02 AM »
Why was it pulled?  :-//

Perhaps calling someone a mongrel is considered slanderous in Rigoland.
Malvern - Worcestershire - England
 

Offline Hydrawerk

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #22 on: November 26, 2015, 06:44:01 AM »
Was there something offensive in the video?? Sorry, I did not watch it. In the meantime you can see these photos made by Dave. https://www.flickr.com/photos/eevblog/albums/72157661062178650/with/22925949389/
Amazing machines. http://www.youtube.com/user/denha (It is not me...)
 

Offline zze110

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #23 on: November 26, 2015, 06:45:00 AM »
Watched it, didn't see anything offensive.

If rigol pulled the video...

Rigol just pulled a Siglent?  or wait, Siglent pulled a Rigol?

Either way.  :popcorn:

Can hit the 'Download' button and get the video directly.  No RigTube needed.
 

Online dr.diesel

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Re: EEVBlog #823 - Rigol DSG815 RF Signal Generator Teardown
« Reply #24 on: November 26, 2015, 07:11:26 AM »
If rigol pulled the video...

I doubt Rigol had anything to do with it.  He's fondled many of their instruments and it was mostly a thumbs up video.


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