Author Topic: Time for a new scope, which one?  (Read 12307 times)

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Offline Radio TechTopic starter

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Time for a new scope, which one?
« on: March 11, 2013, 04:50:41 pm »
For the past couple of weeks I have been looking at the Chinese Digital storage oscilloscopes.
99% of my repairs are geared towards RF radio repair. CB and Ham radio.  For years I have got by with an old Bell and Howell 10D-4540. Yep, 10 mhz.  A few years ago I bought a Sencore CS-61.  Microprocessor controlled 60 mhz usable to 100 mhz. I love this scope.  I have been able to track down problems much faster.  But it was old when I purchased it and does have a few quirks that need addressing.

So with that I am thinking DSO. And looking at the cheap ones. I have about 300 US dollars to spend. And these are the ones I have looked at but not a lot of reviews on them:

Scope 1:
http://www.ebay.com/itm/Digital-100MHz-Oscilloscope-2Channels-1GS-s-USB-110-240V-7-TFT-LCD-SDS1102CNL-/271165497747?pt=BI_Oscilloscopes&hash=item3f22b92193

Scope 2:
http://www.ebay.com/itm/Digital-100MHz-Oscilloscope-Scopemeter-2Channels-1GS-s-USB-110-240V-ADS1102CAL-/281073336222?pt=BI_Oscilloscopes

These will run about 60 bucks to ship to the USA.  So that is about as much as I can put into one.

If anyone has used either of these or can suggest something other it would be greatly appreciated. Maybe even a used scope but hate to buy something either way that is crap.

Thanks

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #1 on: March 11, 2013, 06:03:38 pm »
After looking there really is not much different between the 2 listed models. Was able to find a few things on the web about the Siglent but nothing on the Atten.

Offline Nack486

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Re: Time for a new scope, which one?
« Reply #2 on: March 11, 2013, 08:56:36 pm »
Have you looked into Rigol 'scopes in your price range? I think this is what Dave recommended in a video some time ago.
You can also check out OWON, but I didn't find any 100 MHz ones under $300, only 30 MHz or so. Depends on how much bandwith you actually need.
 

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #3 on: March 11, 2013, 09:40:31 pm »
Thanks for the reply Nack.
I have looked at both the Rigol and Owon scopes.  Like the 2 I posted are 100 mhz. The Rigol and Owon scopes in that price range are 25 mhz. At 27 mhz RF I need at least a min 60 mhz.
I will continue to look at those two brands and see what else I can find on them.

I am looking at this one now:

Owon PDS6062S 60 MHz Portable Digital Oscilloscope

http://www.ebay.com/itm/Owon-PDS6062S-60-MHz-Portable-Dig-Oscilloscope-USB-250MS-s-Dual-Channel-/200899861761?pt=BI_Oscilloscopes&hash=item2ec6909d01

I did find a review on the 6062
« Last Edit: March 11, 2013, 09:46:12 pm by Radio Tech »
 

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Re: Time for a new scope, which one?
« Reply #4 on: March 11, 2013, 09:56:55 pm »
Have you looked into Rigol 'scopes in your price range? I think this is what Dave recommended in a video some time ago.

4 Years ago!
I have not investigated the best bang-per-buck low end scope since then.

Dave.
 

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #5 on: March 11, 2013, 10:07:37 pm »


4 Years ago!
I have not investigated the best bang-per-buck low end scope since then.

Dave.

Oh sweet!! The man Dave himself!    :-+ :-+ :-+
Yep, 4 years has been quite some time. 
I really like the 6062 at 282 dollars with free shipping. but the specs dont look that great.  The sample rate is 250ms vs the other 100 mhz scopes at 1G.

This is getting head banging lol.  |O

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #6 on: March 11, 2013, 10:34:57 pm »
Ok enough asking questions. Time to buy!. And the OWON 6062 it is.

Offline Hydrawerk

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Re: Time for a new scope, which one?
« Reply #7 on: March 12, 2013, 01:05:58 am »
The Owon has only about 33 waveforms per second. Check this video: http://youtu.be/eqcEi6ru4ZM
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Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #8 on: March 12, 2013, 01:36:01 am »
The Owon has only about 33 waveforms per second. Check this video: http://youtu.be/eqcEi6ru4ZM

Thanks for the link.
I thnk this scope will do what I need.  I downloaded the manual and like what I see.
When I get it here and it does not meet my needs I will put it on ebay. Still have my CS-61 to fall back on.

Offline AndrejaKo

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Re: Time for a new scope, which one?
« Reply #9 on: March 12, 2013, 08:05:13 am »
Just keep in mind that the Owon's PDS series scopes are pretty old and aren't even listed on manufacturer's webiste right now. Also they seem to have nasty reputation. People say that they have very bad screen and in general bad build quality. Take a look at this thread for example: https://www.eevblog.com/forum/testgear/does-anyone-have-any-experience-with-owon/. Don't confuse them with newer SDS  series which isn't as bad. Also keep in mind that the review is for SDS6062, which being SDS isn't a PDS series scope and is quite different (twice the sample rate on SDS for start, 6k memory per channel on PDS compared to 10 M memory per channel on SDS).

There's also this series of videos on Youtube where they're featured: if you want to take a look at it.

The Atten and Siglent scopes linked in the first post have four times the sample rate of PDS6062! Why even consider the PDS? You won't get good representation of signals over 25 MHz with it.
« Last Edit: March 12, 2013, 08:25:38 am by AndrejaKo »
 

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #10 on: March 12, 2013, 10:11:52 am »
Thanks for that post.
Well, since this is my first DSO, and not knowing much about them, I decided cheap was good lol.  The frequency range in the stuff I work on is in the 7 to 16 mhz range.
I did get confused between the PDS and SDS to start with. But saw the difference before I bought.
Any way the PDS6062 is on the way. I will find out this week end how it goes. So with that the pro's:
The price is right
The shipping was great
USA based dealer

Will post my results after it arrives.

Offline AndrejaKo

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Re: Time for a new scope, which one?
« Reply #11 on: March 12, 2013, 10:18:24 am »
I hope you'll like your scope. For up to 17 MHz, it could be good enough.


Do tell us your impressions when you get it!
 

Offline moemoe

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Re: Time for a new scope, which one?
« Reply #12 on: March 12, 2013, 11:18:04 am »
I would have proposed https://www.eevblog.com/forum/chat/hantek-tekway-dso-hack-get-200mhz-bw-for-free/, even if it's a little bit over budget, but probably it's too late now :)
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Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #13 on: March 12, 2013, 12:07:57 pm »
That would probably been tje better deal. but we will see how it goes  now. . if i dont like it i have 14 days to return it. but i think it will do all i need.
thanks for the comments guys.

Offline Hydrawerk

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Re: Time for a new scope, which one?
« Reply #14 on: March 12, 2013, 09:04:22 pm »
I would have proposed https://www.eevblog.com/forum/chat/hantek-tekway-dso-hack-get-200mhz-bw-for-free/, even if it's a little bit over budget, but probably it's too late now :)
I still cannot say whether the Hantek is good or not. But according to this review, I would rather choose the Owon. http://youtu.be/u7UgKJ8M7LY  I read in a magazine, that the Hantek is overheating due to no cooling fan.  :--
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Offline moemoe

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Re: Time for a new scope, which one?
« Reply #15 on: March 12, 2013, 10:17:22 pm »
My Voltcraft labeled has a cooling fan, and if you replace the cheap linear regulator with sth better even without a fan (or fan at lower voltage) overheating is no more an issue.

Btw: Why can't people just write reviews? I don't want to be forced to watch 15min video when probably fast reading over some pages could be done in less than 5 minutes. So I don't know your reasons to prefer the Owon, just don't have the time. And this review is about 1.5a old, there changed a lot in the firmware since then.
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Offline AndrejaKo

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Re: Time for a new scope, which one?
« Reply #16 on: March 13, 2013, 01:51:15 am »
Keep in mind that the Owon scope Radio Tech is getting is NOT the series mentioned in the reviews linked! The SDS 6062 is about $100 more expensive than the PDS right now. Also FFT isn't mentioned anywhere on the page for the PDS, so it's probably the older version of PDS. Anyway I'm looking forward to hearing impressions of PDS series.


As for the review videos, I think that it's a combination of two factors: To some people videos may feel more natural than reading and at the same time I have a feeling that it's a bit trendy right now to do video reviews in this so called "Web 2.0" era. Perhaps it's a generation gap somewhere in there?

It is my firm belief that for a customer a clear written review is much more efficient. It would be easier to find information in them on the Internet since it's much more easier to search for content within text than it is to search for content within videos. Furthermore quality can be increased by providing clear and sharp photographs accompanied a by a good text description. A reader can easily skip some parts of text and focus more on others, since it's usually easy to quickly get a summary of text. On the other side, it's rare for videos to have "table of contents" with start time of each segment.

Perhaps it takes more effort to make a text-based review than it takes to make a video based review. It would be nice to do some research on that area. Anyway, this is getting waaay off-topic now, so I'll stop.



 

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #17 on: March 14, 2013, 01:18:43 pm »
Scope arrived at Fed-Ex this morning so I slipped out and picked it up. Cant wait to get home and check it out. Note this is my first DSO.  I also found a DS1052E at a good price and thinking of ordering it also. 3 work benched so need 3 scopes right :   ;D

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #18 on: March 14, 2013, 11:53:29 pm »
Had a few minutes this afternoon to play with it.  The menus are very friendly and easy to follow. The only test I had time to do was connected it to my RF and De-mod box and look at RF and audio waveforms.
Does a decent job.

I like it.

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #19 on: March 15, 2013, 12:41:38 pm »
Could not get the supplied software to do anything, "Error Loading" message. Went to OWON website and downloaded the new drivers. Installed and bingo! Very nice. The display on the scope can be transfered to the PC with one click of the mouse. I really like this.

Offline SLJ

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Re: Time for a new scope, which one?
« Reply #20 on: March 15, 2013, 03:11:18 pm »
Is only the current screen shot transfered or does the PC display update in real time?

Offline AndrejaKo

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Re: Time for a new scope, which one?
« Reply #21 on: March 15, 2013, 03:56:27 pm »
Software works by transferring screenshot by screenshot or set of sample points by set of sample points (which is what is demonstrated here), but it's possible to set up auto refresh rate. The update speed also depends on the amount of data transferred (faster for screenshots), but it's not real-time.
 

Offline Radio TechTopic starter

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Re: Time for a new scope, which one?
« Reply #22 on: March 15, 2013, 04:01:19 pm »
Is only the current screen shot transfered or does the PC display update in real time?

On that attachment I had hit the "Get Data" button. That only shows one screen shot.   But if you hit :Continue Data Download" button it keeps changing on the PC monitor.  So no not really live since it has to keep sending packets of screen shots to the PC.

Offline S_Prime

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Re: Time for a new scope, which one?
« Reply #23 on: March 16, 2013, 06:13:58 pm »
It would be great if Mr. Jones could host a comparison of current budget oscilloscopes. eBay is full of budget 100MHz models at the same price bracket as the Rigol (which cannot be hacked to 100MHz anymore I think).
 

Offline mariush

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Re: Time for a new scope, which one?
« Reply #24 on: March 16, 2013, 06:21:54 pm »
Sure, buy a few of those and mail them to Dave and he'll review them.

 


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