| Products > Test Equipment |
| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
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| jsykes:
I have been following this thread the last few months but this is my first post so I guess I'm a newbie. During that relatively short period I have purchased a DSA815-TG, DG4162, and a DS4022 which I returned for a DS2202. I wasn't going to replace my old HP DSO but thanks to Marmad and Dave's reviews I couldn't resist and am now broke. ;D The 4022 was a nice scope but with averaging and hi-res turned off, it had a 3mV noise level on the lowest scale (1mV/div) which was just too much for me. I am in the USA so I purchased the Analyzer and scope directly from Rigol NA. With them, shipping is not free but I felt more confident purchasing through them. Rigol NA has been very responsive and did the 4022/2202 swap no questions asked. Since Rigol did not have the DG4162 in stock and TEquipment did, I purchased the function generator from them. Shipping took a little longer but I still received the unit in about 1 week. I did experience what I thought was a problem with the 2202. After powering it up cold with channel 1 & 2 set at max sensitivity of 500uV/div, the DC balance takes about 10 minutes of warm-up to settle. (see attached screen shots) Performing a self cal did not correct the issue. I returned it to Rigol NA and they shipped another one again, with no questions asked. Sadly it exhibits the same behavior so I can only assume they all have this issue. :( I haven't seen any posts about it so has anyone else noticed this? |
| jsykes:
Here are 2 more screen shots of the DC balance problem with averaging turned off. |
| neilhao:
Rigol will give their Agents some discounts. This is why Tequipment.net could offer free shipping. The discounts to the Agents could even be 40% of the list price I think. For my real experience, around 2006, I ordered a VS5062D. The list price was 10000RMB, I got it from a local agent who is my friend, finally I got the MSO for only 6000RMB with free shipping. If you know how lenovo make the computers, you will know why everyone have to wait almost 4 weeks. For the relative expensive product, they will just start to buy required parts after receiving your order, and then they have to assemble those parts and ship it to the Rigol in Ohio from the beijing city, China, finally the Rigol in Ohio will ship it to you. Based on the modern logistics industry and the efficient supply chain of China, they can do all above procedures within 4 weeks, this should already be a kind of miracle. For reduce the cost and enhance the supply chain, they started to use the ADC form the MXTronics Corporation which is belong to the China Aerospace System, MXTronics participated in the Chinese Shenzhou Spaceship Project. More important thing is, the MXTronics Corporation is also in the Beijing City, thus Rigol can expect shorter lead time to get the required ADCs than ordering them form the US Corporation. For the cost, as what I remembered, the US gov prohibited to export the ADCs which has the sampling rate higher than 400M samples/s to China, thus Rigol had to use multi-ADCs for higher BW, and they even had to overclock the ADCs. But today, they just need one or two ADCs which can reduce the cost and the noise sufficiently. What they want is Zero Stock. They do not expect to have any product in the warehouse, and every penny is available for investing. Neil --- Quote from: Teneyes on June 04, 2013, 05:40:57 am --- --- Quote from: neilhao on June 04, 2013, 01:44:22 am ---According to above experience. In future, I will order from the Rigol's official site , if Tequipment.NET has no stock. Neil --- End quote --- All my Rigol orders with Tequipment came from Rigol in Ohio . I did check with Rigol and it was more expensive and I needed to pay the shipping and same delivery time. At this time the world supply is Low, Why? --- End quote --- |
| XaS:
--- Quote from: neilhao on June 04, 2013, 06:36:22 am ---For the relative expensive product, they will just start to buy required parts after receiving your order, and then they have to assemble those parts... --- End quote --- ...which doesn't necessarely have to be a negative thing for us too, beside you have to wait for your new toy (I know waiting isn't funny, I was able to pick mine up 6h after I placed my order 15km from my home). But this way there are few out-of-date units in stock. This way they can react fast on hardware problems and apply fixes in the production process, alongside with shipping the units with the most recent firmwares. So besides all negative effects of this policity there are also benefits for us customers. XaS |
| jsykes:
TENEYES Thanks for the tips. For this test there was nothing connected to the inputs. I tried terminating the inputs with 50 ohms and there was no difference but I think the noise @ this 200MHz bandwidth is quite good and I am satisfied with the 2202. It was the 4022 that bothered me a bit with 3.5mV noise. The 3 division thermal drift on channel 1 is annoying but If I need to use the 500uV range I just let it warm up for 10 minutes. The trigger level doesn't seem to have any effect on the thermal drift. |
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