Products > Test Equipment

x1 Oscilloscope Probe Shootout

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EEVblog:
The Rigol PVP3150 vs the Siglent PP510 oscilloscope probes in x1 mode.
Choose your fighter.

TomKatt:
1X probes don't get the love they should get...  For many tasks that don't require 10's of Mhz - such as audio, many power supplies, serial ports and even many small ucontroller testing a 1X probe can offer better resolution than a 10X probe.

My Probe Master 4901-2 1X/10X has a 1X BW of 10Mhz (love these!).  The fixed 1X 4903-2 has a BW of 30Mhz (the shorter 1m cable 4903-1 goes to 38MHz).  Even the DIY coax 1X clip probes I made go 20Mhz+ 

Seems like fixed 1X probes perform better than switchable versions.

But extremely interesting video - I was not aware the Rigol PVP3150 performs that well in 1X mode.  That's impressive.

EEVblog:

--- Quote from: TomKatt on September 20, 2023, 12:26:52 pm ---My Probe Master 4901-2 1X/10X has a 1X BW of 10Mhz (love these!).  The fixed 1X 4903-2 has a BW of 30Mhz (the shorter 1m cable 4903-1 goes to 38MHz).  Even the DIY coax 1X clip probes I made go 20Mhz+ 
Seems like fixed 1X probes perform better than switchable versions.

--- End quote ---

Nice!
https://probemaster.com/4900-oscilloscope-probe-basic-kit-150-300-mhz/

gamalot:
Rigol PVP2150/2350 also have 35MHz bandwidth in 1x mode.

TomKatt:

--- Quote from: gamalot on September 20, 2023, 12:44:15 pm ---Rigol PVP2150/2350 also have 35MHz bandwidth in 1x mode.

--- End quote ---
Wow!  If those are real specs those probes rival much more expensive competitors.

I wonder what the engineering trick is for getting such high BW at 1X...  I'm guessing the cable capacitance plays a large part.  I've noticed that the coax used on my Probe Master's is a bit thicker and more robust (but even more supple silicone) compared to most oem probes provided - which is great for production floor or rough environments.

Edit - in any event, glad to see 1X demonstrated as being much more capable than generally considered.

Edit 2 - I see the Rigol datasheet has a footnote indicating the 35Mhz BW 'Connected to an appropriate Rigol Oscilloscope'.  I'm guessing the scope front end capacitance is also a factor affecting BW.

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