Products > Test Equipment
New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
svetlov:
you can capture the video signal directly from the camera - like in this video
this test shows what your oscilloscope can do it should be carried out first of all to assess the capabilities of digital phosphor - color gradation and trigger response speed - display speed of oscillograms per second and much more
vk6zgo:
--- Quote from: svetlov on August 18, 2023, 06:59:48 pm ---you can capture the video signal directly from the camera - like in this video
this test shows what your oscilloscope can do it should be carried out first of all to assess the capabilities of digital phosphor - color gradation and trigger response speed - display speed of oscillograms per second and much more
--- End quote ---
Any halfway reasonable modern DSO can display analog lines, as all it needs is to save enough samples to correctly resolve around 5MHz over 64us or so, & the memory is usually large enough to handle this at an adequate sample rate. (Some early 1990s major brands & "El Cheapo" ones from the early 2000s & 2010s could not do this.)
Field rate is "another kettle of fish".
Neither of the displays in the video even do much of a job of triggering at horizontal rate.
Colour gradation adds little to the display of analog video waveforms.
tautech:
I find some holdoff and careful trigger level selection helps.
infino:
--- Quote from: vk6zgo on August 19, 2023, 12:48:12 am ---Neither of the displays in the video even do much of a job of triggering at horizontal rate.
Colour gradation adds little to the display of analog video waveforms.
--- End quote ---
Does a great job, single frame picture visible, color signal visible, sync signal visible, picture visible. You just have to either memorize the signal or change the synchronization level.
imarcinszn:
I've recently bought the DPOX180H portable oscilloscope. I'm rather happy with my purchase, but there is one issue that is pretty serious. It was already described by the others that after enabling AC coupling readings on the lower frequencies are highly inaccurate.
I've already tried to externally connect AC blocking capacitor to it with higher value (100nF) and it seems to solve the issue, but i would like to make this change more convenient and to resolder AC blocking capacitor inside of the scanner. Normally I would expect to see some kind of relay or solid state relay, but in this case I cannot find it.
Has anyone tried to change it, or found where AC blocking capacitor is located?
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