The AP020 is a FET active probe, isn't it--a $550 (MSRP), $250 (used VG+) probe--that's comparing apples to lemons.
But I get your point, it shows that the signal is pretty damned clean...
the difference between the generic p6100 and the Fnirsi is interesting though.
Chineese P6100 are crappy compared to brand probes , not linear even bellow 100MHz , so that Fnirsi should be the crappiest probes ever made
Food for thought. I'm surprised at how much difference the probes made at this frequency. There's other threads here that show even the cheapest eBay probes working fine at frequencies an order of magnitude higher.
eg. https://www.eevblog.com/forum/reviews/cheapest-100mhz-oscilloscope-probes-hands-on-review/
Edit: Did you compensate the probes on each device before the screenshots? Images like this say "uncompensated probe" to me:
Once I have it I'll give it a look over. My expectations are low, but we'll see.
User interface looks awful.
In a not at all bandwidth related exercise I tested the 1013D's battery life.
It ran continuously for 6 h 45 m while monitoring two phases of a 4-phase stepper motor being accelerated and cycled clockwise/anticlockwise over a 270° sweep, pulse frequencies 7 to 44 Hz...
Pretty damned good, first thing I've tested that bettered the claimed spec. It took a 3½ hours to recharge at 1.8 A tapering to 0.3 A over the last ½ hour...
I got similar results testing the probe that came with my FNIRSI 5012H. Probe was compensated and then I used a 1V square wave at 2Mhz with 1ns Rise time.
Fnirsi probe:
Generic P6100:
Lecroy AP020:
The probes that came with mine are just plain ol' Chinese P6100s¹--there would be no reason for FNIRSI to make their own, as l suspect in China P6100s come with Happy Meals :
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¹ - Now pretty much generic, and most likely actually made by 37 or more manufacturers. From what I can tell, in Shenzhen, you cannot swing a dead cat without striking at least a dozen electronics producers.
I tried adjusting both probes with the signal applied, and couldn't get any noticeable change at 1X.
I tried adjusting both probes with the signal applied, and couldn't get any noticeable change at 1X.You can't compensate probes on 1x only on 10x. The compensation trimmer cap is not part of the 1x probe circuit.
Still, the probes trimming range must suit the input capacitance of the scopes input for 10x work when matching probes to scopes. Yet it is just not that simple either as a probes frequency response when swept to a scopes max BW and beyond needs be a flat as possible for measurements at any rated frequency to be reasonably accurate.
FYI for any instrument tests it's always best to use direct BNC cable connections and assess the probes independently/separately.
The "P6100" probes with my FNIRSI look slightly different to those pictured. Text on labels is finer, moulded text shown in pic beside CE marking is absent, and possibly the moulded "X1" and "X10" are different.
Maybe my mysterious no-nameplate 'scope-type-thing was fished out of the same dumpster as some knock-off P6100s?
I got similar results testing the probe that came with my FNIRSI 5012H. Probe was compensated and then I used a 1V square wave at 2Mhz with 1ns Rise time.
Fnirsi probe:
Generic P6100:
Lecroy AP020:
Possibly not my ineptness, then.
I tried adjusting both probes with the signal applied, and couldn't get any noticeable change at 1X.
Then the second probe was really bouncing around on that leading edge, while the first was pretty consistent.
Garbage probes, I guess.
Who knows how many let's say "companies" produce P6100 probes ... hard to believe it is just one in the whole China Because is low quality and cheap to made
What tools did you use for these nice screenshots?
Who knows how many let's say "companies" produce P6100 probes ... hard to believe it is just one in the whole China Because is low quality and cheap to madeJust one company makes the P6100 probes.
They have been making probes for decades and make many more than just P6000 models.
Other Chinese probe manufacturers exist too.
the difference between the generic p6100 and the Fnirsi is interesting though.
Yep, I'm wondering how a probe can be that bad when even $5 eBay probes seem to work well up to 300MHz.
Who knows how many let's say "companies" produce P6100 probes ... hard to believe it is just one in the whole China Because is low quality and cheap to madeJust one company makes the P6100 probes.
They have been making probes for decades and make many more than just P6000 models.
Other Chinese probe manufacturers exist too.
Not too sure about that. The generic 6100 (I have 4 identical samples bought from different sources) and FNIRSI Probes are not exactly the same. All generic 6100 in my possession look the same and behave the same. The FNIRSI probe is physically different and behave differently.
Generic 6100 on the left, FNIRSI probe on the right.
I would say they work okish up to 50Mhz (FNIRSI more 25Mhz). 300Mhz not really. Like CDaniel mentioned, linearity is not really good.
I did some tests with a noise source over here:
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg2416473/#msg2416473
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg2860544/#msg2860544
Who knows how many let's say "companies" produce P6100 probes ... hard to believe it is just one in the whole China Because is low quality and cheap to madeJust one company makes the P6100 probes.
They have been making probes for decades and make many more than just P6000 models.
Other Chinese probe manufacturers exist too.
Not too sure about that. The generic 6100 (I have 4 identical samples bought from different sources) and FNIRSI Probes are not exactly the same. All generic 6100 in my possession look the same and behave the same. The FNIRSI probe is physically different and behave differently.
Generic 6100 on the left, FNIRSI probe on the right.Yes but look at your second image, one probe is certainly a copy as it's NOT a P6100.
Of a good few P6100's I've bought over the years all have been from different sources yet by the same manufacturer which after considerable hunting I was able to find however they wouldn't deal with small fry like me.
Now I just get PP510 from Siglent as they are reasonably priced.