Products > Test Equipment
Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes
Jimima:
--- Quote from: 807 on August 09, 2023, 10:56:26 pm ---
--- Quote from: Jimima on August 09, 2023, 07:08:22 pm ---Hi, just got myself an SDS1104x-e and I have a question about the intensity knob. My understanding from the manual is that with no menu active turning the knob should adjust the intensity. However this does not happen on my scope, the knob is generally inactive in this case. Moreover, if I have a menu item selected and I hide the menu with the menu button then the control still controls the now hidden menu option, which can cause a bit of confusion. Am I misunderstanding something about how this is supposed to work?
EDIT: seems like I was reading the wrong manual(!) and in fact this is not how the intensity control works on this model. Odd, seeing as it's still labelled "intensity" but oh well
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Can you give an example of which menu still works when it's hidden?
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So I found that the intensity (ironically?) and maybe other options in that menu can be adjusted if you select it, then hide the menu and turn the knob. Not a huge deal, maybe it's by design but I was confused by the whole thing for a while. Thanks for the explanations, it all makes sense... ish
807:
--- Quote from: Performa01 on August 10, 2023, 07:35:13 am ---Well, that's just history.
Originally, the "Intensity" knob controlled the screen intensity by default, but was also used for item selection as soon as a menu was selected. However, you can have a timeout for menus and after it has expired, the menu is gone and the knob controls the intensity again. Many folks (including me) have sweared a lot when they turned the knob without looking closely, expecting to alter the previously selected item - but changed the intensity instead, just because the menu has timed out in the meantime. AT one point, Siglent quite obviously changed the default behaviour and disabled the intensity control. Intensity is not a function you would use very frequently on a digital scope anyway.
Long story short, the knob once worked as advertised, but not anymore. At all times, something like "Universal Control" was the way more appropriate term for this knob. Unfortunately, FW-updates cannot change the front panel labels... ;)
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Yes. I wondered if it might have been a historic function that had been dropped with later updates. I wouldn't have thought it was too much of a problem if it was accidentally adjusted though. Simply turn it up/down again. But as you say, with digital scopes the intensity doesn't usually need to be adjusted, unlike older CRT scopes where the display may start to fade at higher frequencies.
Can you buy grey tippex? 🤔🙂
BillyO:
Just wondering if anyone has done or seen reported any testing of how high a frequency these scopes will still trigger reliably on?
tautech:
--- Quote from: BillyO on August 25, 2023, 11:12:01 pm ---Just wondering if anyone has done or seen reported any testing of how high a frequency these scopes will still trigger reliably on?
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Any rules ?
With sufficient amplitude we can keep increasing sensitivity to get a waveform to trigger on but if we push too high aliasing becomes a problem and normally seen when the counter doesn't match the input frequency.
Before tests I imagine ~400 MHz which fits with Nyquist.
bdunham7:
--- Quote from: BillyO on August 25, 2023, 11:12:01 pm ---Just wondering if anyone has done or seen reported any testing of how high a frequency these scopes will still trigger reliably on?
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Yes, beyond the point where it makes any sense. It is a digital sinc interpolated trigger and as you approach the theoretical Nyquist limit it breaks up. You can display a 400MHz signal just fine, IIRC. Or, if you activate the paired channel, you'll see the same signal aliased down to 100MHz.
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