On Fri, 26 Oct 2018 13:27:07 -0700, Klaus Kragelund wrote:> A 200MHz scope for 379 USD: >I've been considering replacing my ancient 1950s CRT dual beam 70Lbs 'scope with something more up to date recently and this Siglent Technologies SDS1202X-E 'scope looked like it might be a good value proposition (a snip at a mere £363.05 for UK customers via Amazon's 'Fulfilment' delivery) so have checked out some reviews[1] which seem to confirm this view. However, this is a subject of very recent interest so I haven't yet researched this in any great depth as yet so I was wondering if you had any advice on this 'scope or possibly better alternatives (100MHz B/W dual trace at a minimum) that you could offer to aid me in my search for a reasonably specced and priced unit? [1] Amazon customer reviews here: <https://www.amazon.co.uk/Siglent-Technologies-SDS1202X- Oscilloscope-Channels/dp/B06XZML6RD/ref=sr_1_1? ie=UTF8&qid=1540608976&sr=8-1&keywords=sds1202x-e> TinyURL <https://tinyurl.com/ydgpong6> (click the customer reviews link near the top of the page) The Defpom's Repair Channel review videos here: <https://youtu.be/64kxGDOg7es?t=19> Part 1 <https://youtu.be/laK1v2Zas4o?t=12> Part 2 -- Johnny B Good
amazing ARB pricing
Started by ●October 25, 2018
Reply by ●October 27, 20182018-10-27
Reply by ●October 27, 20182018-10-27
On Friday, 26 October 2018 20:53:56 UTC-4, tabb...@gmail.com wrote:> On Friday, 26 October 2018 23:26:30 UTC+1, speff wrote: > > On Friday, 26 October 2018 14:05:08 UTC-4, Carl wrote: > > > > grounding. It's on eBay for $110-120 depending on frequency range (20, 30, > > > 40, 60 MHz) so basically the same price. Interestingly, each frequency step > > > only adds about $2-3 to the price so I don't see why anyone wouldn't just > > > get the 60 MHz model. > > > China domestic retail pricing is almost exactly double for the 60MHz compared to 20MHz. That's for the original unit from the factory. Some (maybe most) of the eBay ones appear to be clones. I wonder if they cheaped out on the DAC. > > > you don't think they cheaped out on every bit? > > > NTThe original manufacturer, probably not. They say they've sold more than 100K pieces. ------ Listen to the advice of the majority of users, and strive to provide customers with friends with more convenient and easy to use high-performance, cost-effective products. Product upgrade! 1. Add AM, FM, PM, ASK, FSK, PSK modulation functions! 2. The phase adjustment resolution is upgraded to 0.01°; 3. The duty cycle adjustment resolution is upgraded to 0.01%; 4. The square wave rising edge and falling edge time are adjustable. When the instrument sets the square wave output, press the F4 button to switch between the duty cycle and the lifting edge time setting, thus making the instrument more applicable! 5, the use of silicone buttons and gold-plated button contacts, so that the instrument button life is longer, the operating feel is more comfortable.
Reply by ●October 27, 20182018-10-27
On 27/10/18 04:32, Johnny B Good wrote:> On Fri, 26 Oct 2018 13:27:07 -0700, Klaus Kragelund wrote: > >> A 200MHz scope for 379 USD: >> > > I've been considering replacing my ancient 1950s CRT dual beam 70Lbs > 'scope with something more up to date recently and this Siglent > Technologies SDS1202X-E 'scope looked like it might be a good value > proposition (a snip at a mere £363.05 for UK customers via Amazon's > 'Fulfilment' delivery) so have checked out some reviews[1] which seem to > confirm this view. > > However, this is a subject of very recent interest so I haven't yet > researched this in any great depth as yet so I was wondering if you had > any advice on this 'scope or possibly better alternatives (100MHz B/W > dual trace at a minimum) that you could offer to aid me in my search for > a reasonably specced and priced unit?This topic comes up once per week on EEVBlog forum, and is discussed ad nauseam there. Many of the responses are "just buy X it is the best available now", but a few are more measured. There are also some long /long/ threads on reviews of the popular bottom-end scopes. Read EEVBlog forum and you will have a better idea of what questions you should ask, and some answers for them. Don't throw the boat anchor away until you are satisfied that the new scope can do everything you want at least as well as the boat anchor.
Reply by ●October 27, 20182018-10-27
On Saturday, 27 October 2018 04:36:58 UTC-4, Tom Gardner wrote:> On 27/10/18 04:32, Johnny B Good wrote: > > On Fri, 26 Oct 2018 13:27:07 -0700, Klaus Kragelund wrote: > > > >> A 200MHz scope for 379 USD: > >> > > > > I've been considering replacing my ancient 1950s CRT dual beam 70Lbs > > 'scope with something more up to date recently and this Siglent > > Technologies SDS1202X-E 'scope looked like it might be a good value > > proposition (a snip at a mere £363.05 for UK customers via Amazon's > > 'Fulfilment' delivery) so have checked out some reviews[1] which seem to > > confirm this view. > > > > However, this is a subject of very recent interest so I haven't yet > > researched this in any great depth as yet so I was wondering if you had > > any advice on this 'scope or possibly better alternatives (100MHz B/W > > dual trace at a minimum) that you could offer to aid me in my search for > > a reasonably specced and priced unit? > > This topic comes up once per week on EEVBlog forum, and is discussed > ad nauseam there. Many of the responses are "just buy X it is > the best available now", but a few are more measured. > > There are also some long /long/ threads on reviews of the popular > bottom-end scopes. > > Read EEVBlog forum and you will have a better idea of what > questions you should ask, and some answers for them. > > Don't throw the boat anchor away until you are satisfied > that the new scope can do everything you want at least as > well as the boat anchor.My Tek battery powered digital scope lies to you if you set the sweep too slow for the signals.. there does not appear to be any anti-aliasing filter. Analog scopes don't lie in that particular disturbing manner. --sp
Reply by ●October 27, 20182018-10-27
On Fri, 26 Oct 2018 17:57:14 -0700, John Larkin <jjlarkin@highland_snip_technology.com> wrote:>On Thu, 25 Oct 2018 14:27:15 -0700, John Larkin ><jjlarkin@highland_snip_technology.com> wrote: > >> >> >>https://www.amazon.com/Adoner-Precision-Arbitrary-819214bits-Modulation/dp/B07BF7Y7TJ/ref=sr_1_3?ie=UTF8&qid=1540502597&sr=8-3&keywords=fy6600&dpID=41vbYI%252B7YiL&preST=_SX342_QL70_&dpSrc=srch >> >>Other places have this box for $99. > > >This one is $61, shipped. > >https://www.amazon.com/KKmoon-Precision-Dual-channel-Generator-Arbitrary/dp/B014KT3IT6/ref=pd_lutyp_crtyp_simh_3_6?_encoding=UTF8&pd_rd_i=B014KT3IT6&pd_rd_r=9d22d9de-62d5-48ea-92f3-b42f43bcbd69&pd_rd_w=ZXu2r&pd_rd_wg=yOKdh&pf_rd_i=desktop-typ-carousels&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=6a44b7cf-39a3-4c0a-8513-6ba7e2be5761&pf_rd_r=28CNWJQARWQG5BTFSAE6&pf_rd_s=desktop-typ-carousels&pf_rd_t=40701&psc=1&refRID=28CNWJQARWQG5BTFSAE6 > >The specs are interesting.I splurged.... <https://www.amazon.com/GW-Instek-MFG-2160MR-Multi-Channel-Modulation/dp/B072PXK6ZB> Cheers
Reply by ●October 27, 20182018-10-27
On Saturday, 27 October 2018 12:51:35 UTC-4, Martin Riddle wrote:> On Fri, 26 Oct 2018 17:57:14 -0700, John Larkin > <jjlarkin@highland_snip_technology.com> wrote: > > >On Thu, 25 Oct 2018 14:27:15 -0700, John Larkin > ><jjlarkin@highland_snip_technology.com> wrote: > > > >> > >> > >>https://www.amazon.com/Adoner-Precision-Arbitrary-819214bits-Modulation/dp/B07BF7Y7TJ/ref=sr_1_3?ie=UTF8&qid=1540502597&sr=8-3&keywords=fy6600&dpID=41vbYI%252B7YiL&preST=_SX342_QL70_&dpSrc=srch > >> > >>Other places have this box for $99. > > > > > >This one is $61, shipped. > > > >https://www.amazon.com/KKmoon-Precision-Dual-channel-Generator-Arbitrary/dp/B014KT3IT6/ref=pd_lutyp_crtyp_simh_3_6?_encoding=UTF8&pd_rd_i=B014KT3IT6&pd_rd_r=9d22d9de-62d5-48ea-92f3-b42f43bcbd69&pd_rd_w=ZXu2r&pd_rd_wg=yOKdh&pf_rd_i=desktop-typ-carousels&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=6a44b7cf-39a3-4c0a-8513-6ba7e2be5761&pf_rd_r=28CNWJQARWQG5BTFSAE6&pf_rd_s=desktop-typ-carousels&pf_rd_t=40701&psc=1&refRID=28CNWJQARWQG5BTFSAE6 > > > >The specs are interesting. > > I splurged.... > > <https://www.amazon.com/GW-Instek-MFG-2160MR-Multi-Channel-Modulation/dp/B072PXK6ZB> > > CheersI don't think you'll be disappointed. I have this one: https://www.rigolna.com/products/waveform-generators/dg4062/
Reply by ●October 27, 20182018-10-27
On Friday, October 26, 2018 at 11:32:42 PM UTC-4, Johnny B Good wrote:> On Fri, 26 Oct 2018 13:27:07 -0700, Klaus Kragelund wrote: > > > A 200MHz scope for 379 USD: > > > > I've been considering replacing my ancient 1950s CRT dual beam 70Lbs > 'scope with something more up to date recently and this Siglent > Technologies SDS1202X-E 'scope looked like it might be a good value > proposition (a snip at a mere £363.05 for UK customers via Amazon's > 'Fulfilment' delivery) so have checked out some reviews[1] which seem to > confirm this view. > > However, this is a subject of very recent interest so I haven't yet > researched this in any great depth as yet so I was wondering if you had > any advice on this 'scope or possibly better alternatives (100MHz B/W > dual trace at a minimum) that you could offer to aid me in my search for > a reasonably specced and priced unit? > > [1] Amazon customer reviews here: > > <https://www.amazon.co.uk/Siglent-Technologies-SDS1202X- > Oscilloscope-Channels/dp/B06XZML6RD/ref=sr_1_1? > ie=UTF8&qid=1540608976&sr=8-1&keywords=sds1202x-e> > > TinyURL <https://tinyurl.com/ydgpong6> > > (click the customer reviews link near the top of the page) > > > The Defpom's Repair Channel review videos here: > > <https://youtu.be/64kxGDOg7es?t=19> Part 1 > <https://youtu.be/laK1v2Zas4o?t=12> Part 2 > > -- > Johnny B GoodTo each their own. When I wanted something a bit more portable than my Tek 7903 I got a used tek for ~$250 USD, spent some time cleaning it up and calibrating. Good as new. Not quite as glitzy but solid and serviceable. Some tek scopes have Tek specific ICs and modules that are very hard to find, but on the whole, very serviceable, if that be your inclination. Post your interest on the tek NG and you will receive some very useful info. J
Reply by ●October 27, 20182018-10-27
On Sat, 27 Oct 2018 14:11:31 -0400, "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> wrote:>John Larkin wrote: >> https://www.amazon.com/Adoner-Precision-Arbitrary-819214bits-Modulation/dp/B07BF7Y7TJ/ref=sr_1_3?ie=UTF8&qid=1540502597&sr=8-3&keywords=fy6600&dpID=41vbYI%252B7YiL&preST=_SX342_QL70_&dpSrc=srch >> >> Other places have this box for $99. > >Just how arbitrary is an ARB? Can any of them download a waveform from >a scope and make little adjustments like reducing overshoot or ringing, >so you can see if doing so would help before you go to the effort of >reducing it for real?It sure looks like you can load waveforms. You could slurp a wavaform from a scope, math it, and then load the ARB. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●October 27, 20182018-10-27
On 2018-10-25 14:27, John Larkin wrote:> > > https://www.amazon.com/Adoner-Precision-Arbitrary-819214bits-Modulation/dp/B07BF7Y7TJ/ref=sr_1_3?ie=UTF8&qid=1540502597&sr=8-3&keywords=fy6600&dpID=41vbYI%252B7YiL&preST=_SX342_QL70_&dpSrc=srch > > Other places have this box for $99. > >I have a no-name ARB because I needed one year ago for aerospace testing. The 1st one had a bum FPGA. Was replaced. The 2nd one now has a slowly failing rotary encoder. Oh well. -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●October 27, 20182018-10-27
Tom Del Rosso wrote:>Just how arbitrary is an ARB? Can any of them download a waveform from a >scope and make little adjustments like reducing overshoot or ringing, so >you can see if doing so would help before you go to the effort of reducing >it for real? > >Or do they just do complex modulations, or is it just another name for >function generator?Some may be able to download directly from a scope but it would probably have to be the same brand. They usually have front panel waveform creation and editing where you can step through a waveform point by point and either directly enter a numerical value or use the up and down arrows to modify it. All should be able to talk to a PC, and the scope should also be able to talk to the PC so you should be able to upload a waveform with the scope software, either save it directly or export as a CSV file depending on the brands, then import into the ARB software, edit as desired, and then download. The waveform is point-by-point completely arbitrary but then you have to take into account the sample rate and bandwidth of the ARB to determine just how sharp a corner you can actually get and also what the actual output frequencies will be (if the scope and ARB sampling rates differ, for example). They are great fun to play with, and actually useful too :-). One gotcha for me with the cheap ARBs in this thread is that the longest a single waveform can be is only 8192 points. I assume that you can slow down the sample rate to extend that in time but eventually you hit the minimum required bandwidth. They can store 64 waveforms and might be able to chain waveforms together with no glitches or timing issues which would allow one 512 Kpt waveform but you would have to handle the breaking apart and downloading in software. I haven't read the manual to see if all that would work. -- Regards, Carl Ijames
