P.S my tek2465 died today, spark noises and smoke cloud, I wasn't completely surprised . I guess it couldn't handle the mental pressure of a third oscilloscope.
on to DHO800's LiteOn PSU... (beware this is non-reversible invasive action to tear down)
only 3 wires to USB3 connector, black (gnd), blue?, red?. so what kind of PD is this? when not connected to DSO, blue is 4.11V, red is 0V, once connected whether on or off, blue is 1.68V, red is 15V. i tried $1.50 USB3 DC pigtail to power DSO from SMPS PSU... if 12V, current is 3A, if 15V, current is 2.37A during operation (at boot up , its half that). so its a preferable fact that PSU/DSO is not that complicated to handle/diy, fwiw...
You added a carrying handle to your siggen?
on to DHO800's LiteOn PSU... (beware this is non-reversible invasive action to tear down)
only 3 wires to USB3 connector, black (gnd), blue?, red?. so what kind of PD is this? when not connected to DSO, blue is 4.11V, red is 0V, once connected whether on or off, blue is 1.68V, red is 15V. i tried $1.50 USB3 DC pigtail to power DSO from SMPS PSU... if 12V, current is 3A, if 15V, current is 2.37A during operation (at boot up , its half that). so its a preferable fact that PSU/DSO is not that complicated to handle/diy, fwiw...Do you have any images of the PSU board? Does it have all the proper filtering and decent quality components?
so what kind of PD is this?
on to DHO800's LiteOn PSU... (beware this is non-reversible invasive action to tear down)
only 3 wires to USB3 connector, black (gnd), blue?, red?. so what kind of PD is this? when not connected to DSO, blue is 4.11V, red is 0V, once connected whether on or off, blue is 1.68V, red is 15V. i tried $1.50 USB3 DC pigtail to power DSO from SMPS PSU... if 12V, current is 3A, if 15V, current is 2.37A during operation (at boot up , its half that). so its a preferable fact that PSU/DSO is not that complicated to handle/diy, fwiw...
I didn't take any current measurements, but I did measure the claimed voltage domains, and all were supported when I selected each one with the PD trigger.
Here's my LiteOn, together with a capture of the capabilities, captured with a Cypress CY4500 protocol analyser (hooked up to a PD trigger board) and corresponding scope traces. These were taken at PD trigger insertion.
Here's my LiteOn, together with a capture of the capabilities, captured with a Cypress CY4500 protocol analyser (hooked up to a PD trigger board) and corresponding scope traces. These were taken at PD trigger insertion.looks complicated than i thought. i was only interested to see how to make my own battery powered PSU. btw, this forum is fucked up... when i click the first image's thumbnail, different picture popped out, this happen frequently now...see attached.. even when i make a post with attachments, every time the first picture i uploaded in the list will become the last in my post, i have to shuffle the order to get correct view, really fucked up...
now i'm not sure if you people can see my attachments the way i see them from here.
Here are the images again.
Here are the images again.now it worked thanks.. i thought you dismantled your PSU like i did, but you have a dedicated PD tester. the USB3 pins are too deep and tiny inside for my DMM probe to reach. so i have to cut open the enclosure. now its taped back again no worry.
Here are the images again.now it worked thanks.. i thought you dismantled your PSU like i did, but you have a dedicated PD tester. the USB3 pins are too deep and tiny inside for my DMM probe to reach. so i have to cut open the enclosure. now its taped back again no worry.So, from what I saw on your previous photo, the oscilloscope power on and operates fine if I only connect +12V (red) and GND (black) ignoring the blue wire (Vbus) right? This will make building a battery very simple.
I didn't take any current measurements, but I did measure the claimed voltage domains, and all were supported when I selected each one with the PD trigger.
So it's a legal universal PD charger? It's said it should not used for smart phone somewhere I have forgoten, maybe in the manual.
The fixed 12V charger can be recognized by its special plug, with a little pin that stops you from inserting it into 3rd party devices. The DHO800/900 has a little hole next to its charging jack which matches with that pin.
- touchscreen (a personal preference, fiddly in some environments)
- separate grounding/PE wire (asks for trouble)Disable button on the front panel. Everything can be done without the touch screen.
- touchscreen (a personal preference, fiddly in some environments)
- separate grounding/PE wire (asks for trouble)Disable button on the front panel. Everything can be done without the touch screen.how to change trigger mode (auto, normal, single.. esp normal) without touch screen? i dont find a button or rotary knob to change that, must use touch screen on trigger window..
When I get mine I will do a teardown and schematic for the PSU make sure it's built right and help people fault finding in the future.
When I get mine I will do a teardown and schematic for the PSU make sure it's built right and help people fault finding in the future.
When I get mine I will do a teardown and schematic for the PSU make sure it's built right and help people fault finding in the future.