Rigol's New DHO800 Oscilloscope unbox & teardown - Page 1
Forum section: electronics / testgear

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 02:25:39 am
content: DHO804

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 02:29:02 am
content: The power supply.12V 4A with TYPE-C.it looks so cheap....

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 02:32:23 am
content: 4x PVP2150 1/10X switchable probes

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 02:36:26 am
content: The backside

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 02:49:57 am
content: power up & aboutit based on android 7.1.2 system.

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:08:07 am
content: WTF...When i adjust minimum vertical division，it has a large ripple at 55KHz and large noice....I guess it may come from power supply.

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:10:33 am
content: When i place my hand near the channel inputs,the noise become much more like this

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:15:11 am
content: It support PD.I replaced power supply for it from my samsung notebook.Now it looks fine.

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:28:40 am
content: The original power supply,it sucks.This is the cheapest power supply without any fliter....

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:34:34 am
content: The backside of the mainboard.There is a TF card near RJ45 port.It’s the system rom.

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:42:38 am
content: remove the heatsink

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:45:04 am
content: The RK3399 CPU and memories

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 03:54:50 am
content: The Xilinx ZYNQ XC7Z015 Main FPGA.and a 4Gbits ddr3l dram from gigadevice,and the two empty dram for DHO900?

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 04:02:09 am
content: RT8847IQ 2GS/s ADC.the same with DHO1000/4000.it may limited to 1.25GS/s by software?

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 04:03:18 am
content: RT1642IQ Front End. the same with DHO1000/4000 too.

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 04:05:42 am
content: the other side of mainboard

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 04:07:11 am
content: front panel without logic analyzer port

author: Azusa
author_rank: Contributor
timestamp: July 17, 2023, 04:16:26 am
content: The AFG for DHO9x4S is a pluggin module.The LA port is directly connect to the main fpga.The other component looks all populated,so DHO800 uphack to DHO900 may need to solder up two drams and LA port only and flash the system?

author: ataradov
author_rank: Super Contributor
timestamp: July 17, 2023, 05:25:55 am
content: I really hope external power supplies don't become a thing. Who cares if your product is small if you still have to carry random stuff around.

author: slavoy
author_rank: Regular Contributor
timestamp: July 17, 2023, 07:14:40 am
content: Is this power supply some kind of joke? But after replacing it with a decent one, it seems to be okay. Unfortunately, I can only see a thumbnail on the forum, and when I enlarge the image, it shows a different one.However, I wouldn't worry too much about it. It's cheap, so the first step would be to replace the power supply. Anyway it's a surprising move, it reminds me that cheap usb "thing" from FNIRSI

author: Aldo22
author_rank: Super Contributor
timestamp: July 17, 2023, 08:37:17 am
content: Thanks for the tear down.Does anyone know when this device will be available in Europe?EDIT: In the meantime I got a reply from batterfly:Quote from: batterfly

author: ataradov
author_rank: Super Contributor
timestamp: July 17, 2023, 03:42:59 pm
content: It would be though gray marked for sure. Officially - it would be strange, but if some retailers can make a deal, it would be nice.

author: Martin72
author_rank: Super Contributor
timestamp: July 17, 2023, 05:12:21 pm
content: October 2023...Time enough to polish some things.

author: thm_w
author_rank: Super Contributor
timestamp: July 18, 2023, 10:02:23 pm
content: If the power supply has a type-C connector, then its likely non-compliant as its constantly outputting 12V and will blow up your equipment?Either way probably some junk thrown in by the seller or a temporary solution for a PSU. No way the real scope would ship with that. Still, indicates lack of filtering within the scope itself.Previous thread:https://www.eevblog.com/forum/testgear/rigol-dho800900-pre-sales-begin/

author: Fungus
author_rank: Super Contributor
timestamp: July 18, 2023, 11:07:51 pm
content: Quote from: thm_w on July 18, 2023, 10:02:23 pmNope. Type-C can output many different voltages. You can negotiate with the supply and tell it how many volts you want.