Products > Test Equipment

x1 Oscilloscope Probe Shootout

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2N3055:

--- Quote from: tautech on September 25, 2023, 10:11:23 am ---
--- Quote from: 2N3055 on September 25, 2023, 09:21:38 am ---
--- Quote from: artur0089 on September 25, 2023, 08:49:48 am ---
--- Quote from: 2N3055 on September 25, 2023, 08:28:19 am ---Best way

--- End quote ---
use of two generator channels.
The input capacitance of X1 probes is 50-90 pF.
Without interference and distortion, T-split operates up to 2 MHz.

--- End quote ---


Bode plot works by comparing against reference chanel. It is differential measurement...

--- End quote ---
FYI, the Bode plot connection image artur0089 linked is from rf-loop in first page of his Bode Plot II thread.
It is a valid connection type once AWG channels have been copied/linked and aligned and does not require BNC Tees.

--- End quote ---

I remember. He used this setup with DUT that has 50Ω impedance inputs itself and not probe testing. In addition to that he does say to use it only on low frequencies.

With Bode test we are not concerned with fact that signal from AWG will get amplitude or phase variations. We only need to ensure reference channel sees exactly the same signal as DUT as much as possible.
 It is relative measurement.

EEVblog:
Here you go, tests re-run with practically the same results as my original video.
CH1 ref input 50ohm terminated, and CH2 probe to BNC adapter on a CH1 T-piece.

EEVblog:
4 more probes, part numbers in the annotation on screen.

artur0089:

--- Quote from: 2N3055 on September 25, 2023, 10:56:15 am ---That shows how comparison of measurement equipment, even as simple one as probes calls for lot of scrutiny, preparation and attention to detail to ensure really level playing field.

--- End quote ---
Why, if everything has been tested and proven a long time ago?
And, most importantly, it complies with the schedule from the manufacturer!

2N3055:

--- Quote from: artur0089 on September 25, 2023, 11:33:45 am ---
--- Quote from: 2N3055 on September 25, 2023, 10:56:15 am ---That shows how comparison of measurement equipment, even as simple one as probes calls for lot of scrutiny, preparation and attention to detail to ensure really level playing field.

--- End quote ---
Why, if everything has been tested and proven a long time ago?
And, most importantly, it complies with the schedule from the manufacturer!

--- End quote ---

So why are you measuring probes if you already know what manufacturer said?. What is the point of the topic ?  ^-^

Take one of those 1x10x probes and experiment with compensation trimmer and see how depending of how probe is set will change response.
With 1x or 10x fixed probe it will also differ which scope are using it for too...

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