On Friday, 26 October 2018 06:40:37 UTC-4, Clifford Heath wrote:> On 26/10/18 7:42 pm, speff wrote: > > On Thursday, 25 October 2018 17:27:24 UTC-4, 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. > > > > $99 would be a very good price, from what I can see, better than China list- looks like a more normal price would be about $150-$200 in the US for the 60MHz version. The lower frequency versions are significantly cheaper. > > > > It appears to use an Altera Cyclone IV FPGA driving 14-bit DAC. 320x240 color TFT. This is NOT your hobbyist DDS chip. > > The prevalence of cloning in this kind of device > is usually because someone published the designs. > > It's often an advanced hobbyist. I have a couple > of gadgets like this; if you search hard enough > you can find the original blog postings showing > where the design was developed. There are plenty > of hobbyists advanced enough to have developed > this design. > > I haven't searched, but mere hardware copying > wouldn't result in the plethora of clones; the > original software has to be published somewhere. > Otherwise the cloners would have to write it again > (differently) to accommodate any design changes, > and that's too much like hard work; they'd need to > understand how what they were cloning works.Googled it and there's a huge thread at EEVBLOG on this product. https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/ -sp
amazing ARB pricing
Started by ●October 25, 2018
Reply by ●October 26, 20182018-10-26
Reply by ●October 26, 20182018-10-26
On Fri, 26 Oct 2018 01:42:11 -0700 (PDT), speff <spehro@gmail.com> wrote:>On Thursday, 25 October 2018 17:27:24 UTC-4, 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. > >$99 would be a very good price, from what I can see, better than China list- looks like a more normal price would be about $150-$200 in the US for the 60MHz version. The lower frequency versions are significantly cheaper. > >It appears to use an Altera Cyclone IV FPGA driving 14-bit DAC. 320x240 color TFT. This is NOT your hobbyist DDS chip. > >Certainly not as nice as a Keysight (or whatever they're calling themselves these days) or a Rigol, but very economical. > >--sp > > > >I have a classic B+K analog (well, with frequency counter) fungen on my bench. The human interface is highly advanced: you turn knobs to do stuff. I wish my car did that. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●October 26, 20182018-10-26
On 27/10/18 2:21 am, speff wrote:> On Friday, 26 October 2018 06:40:37 UTC-4, Clifford Heath wrote: >> On 26/10/18 7:42 pm, speff wrote: >>> On Thursday, 25 October 2018 17:27:24 UTC-4, 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. >>> >>> $99 would be a very good price, from what I can see, better than China list- looks like a more normal price would be about $150-$200 in the US for the 60MHz version. The lower frequency versions are significantly cheaper. >>> >>> It appears to use an Altera Cyclone IV FPGA driving 14-bit DAC. 320x240 color TFT. This is NOT your hobbyist DDS chip. >> >> The prevalence of cloning in this kind of device >> is usually because someone published the designs. >> >> It's often an advanced hobbyist. I have a couple >> of gadgets like this; if you search hard enough >> you can find the original blog postings showing >> where the design was developed. There are plenty >> of hobbyists advanced enough to have developed >> this design. >> >> I haven't searched, but mere hardware copying >> wouldn't result in the plethora of clones; the >> original software has to be published somewhere. >> Otherwise the cloners would have to write it again >> (differently) to accommodate any design changes, >> and that's too much like hard work; they'd need to >> understand how what they were cloning works. > > Googled it and there's a huge thread at EEVBLOG on this > product. > > https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/Good info, thanks. My comments about cloners stand, I think.
Reply by ●October 26, 20182018-10-26
On 27/10/18 2:21 am, speff wrote:> On Friday, 26 October 2018 06:40:37 UTC-4, Clifford Heath wrote: >> On 26/10/18 7:42 pm, speff wrote: >>> On Thursday, 25 October 2018 17:27:24 UTC-4, 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. >>> >>> $99 would be a very good price, from what I can see, better than China >>> list- looks like a more normal price would be about $150-$200 in the US >>> for the 60MHz version. The lower frequency versions are significantly >>> cheaper. >>> >>> It appears to use an Altera Cyclone IV FPGA driving 14-bit DAC. 320x240 >>> color TFT. This is NOT your hobbyist DDS chip. >> >> The prevalence of cloning in this kind of device >> is usually because someone published the designs. >> >> It's often an advanced hobbyist. I have a couple >> of gadgets like this; if you search hard enough >> you can find the original blog postings showing >> where the design was developed. There are plenty >> of hobbyists advanced enough to have developed >> this design. >> >> I haven't searched, but mere hardware copying >> wouldn't result in the plethora of clones; the >> original software has to be published somewhere. >> Otherwise the cloners would have to write it again >> (differently) to accommodate any design changes, >> and that's too much like hard work; they'd need to >> understand how what they were cloning works. > > Googled it and there's a huge thread at EEVBLOG on this > product. > > https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/I didn't read the whole thread, just the first and last few plus a page here and there, but by the end the take home message seemed to be to get the model 6800 since it fixes most or all of the complaints, especially about 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. -- Regards, Carl Ijames
Reply by ●October 26, 20182018-10-26
I didn’t read the entire thread, but there was a discussion about jitter and high frequency shape distortion But good link, Larkin, I have a HP33120A arb generator It’s really good. I bought it 20 years ago, and I measured most important specs a couple of months ago, and almost no drift Amazingly bad design about square wave function, not possible to generate duty cycle above 80 or below 20 percent. Need to fiddle with burst mode Also, no signal off button So will buy the Chinese model for sure, even though I do not need it badly or even remotely (wife buys shoes, I buy tools and electronics) Cheers Klaus
Reply by ●October 26, 20182018-10-26
A 200MHz scope for 379 USD: https://www.amazon.com/Siglent-Technologies-SDS1202X-Oscilloscope-Channels/dp/B06XZML6RD/ref=pd_aw_sbs_328_of_13?_encoding=UTF8&pd_rd_i=B06XZML6RD&pd_rd_r=0578ee0f-d95c-11e8-8a27-e7c97784a407&pd_rd_w=dV3r6&pd_rd_wg=B2YIF&pf_rd_i=mobile-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=926ebe02-3236-40c6-ac63-01ad178f498a&pf_rd_r=Y2SMMGCRT1ZGCYBYF1GE&pf_rd_s=mobile-dp-sims&pf_rd_t=40701&psc=1&refRID=7M8XSZS3XF3JSQZ68R27 Cheers Klaus
Reply by ●October 26, 20182018-10-26
On Friday, 26 October 2018 14:05:08 UTC-4, Carl wrote:> On 27/10/18 2:21 am, speff wrote: > > On Friday, 26 October 2018 06:40:37 UTC-4, Clifford Heath wrote: > >> On 26/10/18 7:42 pm, speff wrote: > >>> On Thursday, 25 October 2018 17:27:24 UTC-4, 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. > >>> > >>> $99 would be a very good price, from what I can see, better than China > >>> list- looks like a more normal price would be about $150-$200 in the US > >>> for the 60MHz version. The lower frequency versions are significantly > >>> cheaper. > >>> > >>> It appears to use an Altera Cyclone IV FPGA driving 14-bit DAC. 320x240 > >>> color TFT. This is NOT your hobbyist DDS chip. > >> > >> The prevalence of cloning in this kind of device > >> is usually because someone published the designs. > >> > >> It's often an advanced hobbyist. I have a couple > >> of gadgets like this; if you search hard enough > >> you can find the original blog postings showing > >> where the design was developed. There are plenty > >> of hobbyists advanced enough to have developed > >> this design. > >> > >> I haven't searched, but mere hardware copying > >> wouldn't result in the plethora of clones; the > >> original software has to be published somewhere. > >> Otherwise the cloners would have to write it again > >> (differently) to accommodate any design changes, > >> and that's too much like hard work; they'd need to > >> understand how what they were cloning works. > > > > Googled it and there's a huge thread at EEVBLOG on this > > product. > > > > https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/ > > I didn't read the whole thread, just the first and last few plus a page here > and there, but by the end the take home message seemed to be to get the > model 6800 since it fixes most or all of the complaints, especially about > 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. > > -- > Regards, > Carl IjamesChina 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. --sp
Reply by ●October 26, 20182018-10-26
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? NT
Reply by ●October 26, 20182018-10-26
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. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●October 26, 20182018-10-26
On Friday, October 26, 2018 at 4:27:11 PM UTC-4, Klaus Kragelund wrote:> A 200MHz scope for 379 USD: > > https://www.amazon.com/Siglent-Technologies-SDS1202X-Oscilloscope-Channels/dp/B06XZML6RD/ref=pd_aw_sbs_328_of_13?_encoding=UTF8&pd_rd_i=B06XZML6RD&pd_rd_r=0578ee0f-d95c-11e8-8a27-e7c97784a407&pd_rd_w=dV3r6&pd_rd_wg=B2YIF&pf_rd_i=mobile-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=926ebe02-3236-40c6-ac63-01ad178f498a&pf_rd_r=Y2SMMGCRT1ZGCYBYF1GE&pf_rd_s=mobile-dp-sims&pf_rd_t=40701&psc=1&refRID=7M8XSZS3XF3JSQZ68R27 > > Cheers > > KlausI'm totally in love with this keysight 'scope, but I think it's close to ~$1k.. it just does everything right. (and it all starts with the triggering.) I turn it on and it remembers all the last settings, all stuff should do that. George H.
