Products > Test Equipment
Siglent SDS800X HD Review & Demonstration Thread
pdenisowski:
--- Quote from: joeqsmith on May 12, 2024, 07:30:32 pm ---While a VSWR of 1.5 may be a good guideline when talking about antennas, it's not something I have ever considered when making a measurement in the lab. Certainly not a standard. Rather, I treat each measurement as a unique problem.
--- End quote ---
This is very true: what constitutes "acceptable" VSWR for an application is all over the place: in some applications, for example for amplifier inputs, a very low VSWR (< 1.x) is more or less expected. In some other applications, such as in EMC radiated immunity testing, seeing a VSWR of < 6 at the amplifier output for some portion of a frequency sweep might still considered okay - even when Tx power is in the range of 100s of watts (!!!)
With regards to antennas, the "bandwidth" of an antenna is often defined as the frequency range over which VSWR < 2.0 (or sometimes even < 3.0). I actually was writing about this today as part of a presentation / video I'm about to release on antenna testing :)
MildInductor:
Is the SDS800X able to provide 5V at 2A out of the USB ports? I can’t see any specifications regarding this. I would like to use a little travel router with the oscilloscope.
Perhaps someone feels like putting a 2.5ohm resistor into the USB along with a current meter :-DD
tautech:
--- Quote from: MildInductor on September 26, 2024, 07:46:32 am ---Is the SDS800X able to provide 5V at 2A out of the USB ports? I can’t see any specifications regarding this. I would like to use a little travel router with the oscilloscope.
Perhaps someone feels like putting a 2.5ohm resistor into the USB along with a current meter :-DD
--- End quote ---
USB outlet is OL protected and if it trips rebooting the scope will restore it.
MildInductor:
Good to hear. It would be great to get some indication if 2A (or maybe even 3A but I think that is pushing it) is possible to draw. Perhaps someone has tried before?
tautech:
--- Quote from: MildInductor on September 26, 2024, 07:46:32 am ---Is the SDS800X able to provide 5V at 2A out of the USB ports? I would like to use a little travel router with the oscilloscope.
--- End quote ---
I use this AP set to Bridge mode all the time:
https://www.tp-link.com/us/home-networking/wifi-router/tl-wr802n/#specifications
5V 1A
Look up the power requirement spec for yours.
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