Author Topic: NEW 100MHz Keysight Scope Release on 1st March 2017  (Read 161979 times)

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Offline TheAmmoniacal

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #725 on: May 03, 2017, 08:42:16 pm »
I made sure to compensate my probes as accurately as I could, will report any issues if I see them. Nothing so far.

Anyone know if it's possible to hide the menu? I want all the screen for my waveforms!

Should definitely add a 24-hour clock option, it's a bit like Fahrenheit..
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Online mikeselectricstuff

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #726 on: May 03, 2017, 09:20:53 pm »
I did some quick tests - only saw a few pixels' worth of change at 200mv/div on the front-panel cal signal over temp - not that significant in practice.
 
However what was very noticeable was that the compensation adjustment is very sensitive, sometimes quite tricky to set exactly right, and IMO seems to have way too much adjustment range. With so much range it's easy to see how small effect of temperature could significantly affect the setting.
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Offline AndyC_772

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #727 on: May 04, 2017, 06:56:19 am »
Should definitely add a 24-hour clock option, it's a bit like Fahrenheit..

The 24 hr clock is obsolete? Since when?

Offline TheAmmoniacal

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #728 on: May 04, 2017, 07:00:19 am »
Should definitely add a 24-hour clock option, it's a bit like Fahrenheit..

The 24 hr clock is obsolete? Since when?

The opposite. The 12-hour clock is not at all intuitive to me, I don't like it, never use it. Presenting me with a 12-hour clock is like giving me the temperature in Fahrenheit, annoying and counter-intuitive.
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Online TK

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #729 on: May 04, 2017, 12:27:24 pm »
I think I found a BUG in my EDUX1002G.  The signal on the training/compensation signal output changes depending on the modulation of the WAVEGEN output.  The square wave from the compensation signal changes to sinusoidal if AM modulation is used on the wavegen.  The same issue if I use the training pulse signal (same output as the compensation signal), it changes to sinusoidal if AM modulation is activated.

Channel 1 is the compensation/training signal.  Channel 2 is connected to wavegen output.

EDIT: I think the compensation/training signal output is used to do the AM modulation.  The frequency changes from 10KHz to 1KHz (1KHz is the AM modulation frequency)
« Last Edit: May 04, 2017, 01:23:52 pm by TK »
 

Offline JPortici

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #730 on: May 04, 2017, 03:01:55 pm »
cool! do can-bus modulated carrier  :-DD
 

Offline pascal_sweden

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #731 on: May 08, 2017, 12:36:10 pm »
Any update on the probe compensation issue from Keysight Product Management?
 

Offline TheAmmoniacal

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #732 on: May 08, 2017, 05:16:35 pm »
I can confirm the performance of the probes are not that great, they do drift more than even the cheapest of probes out there (generic P6200 type, filename abbr. Mic).

I've attached screenshots below.

I had the scope turned on for 15 minutes before doing the compensation and measurements. It was turned off during the 3 hours.

Likely getting a new pair of probes to use with this one.
« Last Edit: May 08, 2017, 05:18:26 pm by TheAmmoniacal »
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Offline serggio

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #733 on: May 08, 2017, 06:41:45 pm »
Likely getting a new pair of probes to use with this one.
Not you alone.. Hope that Keysight will start recalls company for this probes
 

Offline David Hess

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #734 on: May 08, 2017, 07:09:32 pm »
An input capacitance normalizer could be used to run this test without a probe to verify the oscilloscope itself.  They are easy enough to make with a 1 megohm resistor and adjustable  capacitance.

https://www.eevblog.com/forum/testgear/tektronix-input-rc-normalizer-067-0537-00-data-sheetmanual/
 

Offline serggio

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #735 on: May 08, 2017, 07:43:03 pm »
An input capacitance normalizer could be used to run this test without a probe to verify the oscilloscope itself.  They are easy enough to make with a 1 megohm resistor and adjustable  capacitance.

https://www.eevblog.com/forum/testgear/tektronix-input-rc-normalizer-067-0537-00-data-sheetmanual/

One problem is how to send LF test signal to the BNC input  :)
 

Offline David Hess

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #736 on: May 08, 2017, 08:19:20 pm »
An input capacitance normalizer could be used to run this test without a probe to verify the oscilloscope itself.  They are easy enough to make with a 1 megohm resistor and adjustable  capacitance.

https://www.eevblog.com/forum/testgear/tektronix-input-rc-normalizer-067-0537-00-data-sheetmanual/

One problem is how to send LF test signal to the BNC input  :)

This is why real oscilloscopes (1) use a BNC connector for the probe compensation signal. :)

A function generator output is more than sufficient or at least it should be.

(1) Real HEAVY oscilloscopes.
 

Online TK

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #737 on: May 09, 2017, 01:10:56 pm »
I think I found a BUG in my EDUX1002G.  The signal on the training/compensation signal output changes depending on the modulation of the WAVEGEN output.  The square wave from the compensation signal changes to sinusoidal if AM modulation is used on the wavegen.  The same issue if I use the training pulse signal (same output as the compensation signal), it changes to sinusoidal if AM modulation is activated.

Channel 1 is the compensation/training signal.  Channel 2 is connected to wavegen output.

EDIT: I think the compensation/training signal output is used to do the AM modulation.  The frequency changes from 10KHz to 1KHz (1KHz is the AM modulation frequency)
Any comments from Keysight?

Is there any thread on this forum to report bugs on the Keysight X-Series scopes?
 

Offline Keysight DanielBogdanoff

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #738 on: May 09, 2017, 07:07:50 pm »
Any comments from Keysight?

Is there any thread on this forum to report bugs on the Keysight X-Series scopes?

Sorry! Super busy week :). R&D also monitors this thread and is working on a patch. I'll post more details once that's available, it shouldn't be more than a week or two.
 

Online TK

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #739 on: May 09, 2017, 07:30:39 pm »
Any comments from Keysight?

Is there any thread on this forum to report bugs on the Keysight X-Series scopes?

Sorry! Super busy week :). R&D also monitors this thread and is working on a patch. I'll post more details once that's available, it shouldn't be more than a week or two.
Thanks!
 

Offline pascal_sweden

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #740 on: May 17, 2017, 07:53:47 pm »
No updates for another week on this issue! Really?
 

Offline Keysight DanielBogdanoff

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #741 on: May 25, 2017, 10:03:50 pm »
Hi Everyone!

A couple things:

1. For the probe comp/modulation thing, that's part of how we implemented the modulation - I'll comment further with a reply from the support team, but it's not a bug, just something that may have to be worked around.

2. Probes - We're still evaluating the issue, but can confirm that we do see the capacitor drifting with temperature. We are working to characterize it and figure out how prevalent the issue is as some units appear to show it more than others. I'll follow up here with more info as it comes to me. Thanks for your patience!
 

Online TK

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #742 on: May 25, 2017, 11:54:36 pm »
2. Probes - We're still evaluating the issue, but can confirm that we do see the capacitor drifting with temperature. We are working to characterize it and figure out how prevalent the issue is as some units appear to show it more than others. I'll follow up here with more info as it comes to me. Thanks for your patience!
I have the EDUX with the 70MHz probe and both of them have the same problem.  Heating probes or storing them in a temperature controlled environment is not possible in a hobby lab.  I am not sure if it is just the temperature, there must a mechanical issue because it always goes to undercompensated status, even when temperature in my basement changes up and down... never looks overcompensated...
 

Offline serggio

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #743 on: May 29, 2017, 10:35:55 am »
Just received my new one Keysight N2843A Passive Probe...



Probe as probe, seems well done, till I not started to using it...
Probe body been very sensitive to touching it.



Fortunately, no tools needed to disassembly it, both parts of case connected by latchs.



As we can see, shield caps not soldered to shield body and just putted in case, each from it's own side - that is all assembly.  |O
But what inside?? :o Look at soldering.... WTF?? |O |O |O















If I will somewhen soldering like this I'll cut off my hands oneself... No comments...  :(

« Last Edit: May 29, 2017, 03:18:58 pm by serggio »
 

Online TK

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #744 on: May 29, 2017, 12:10:16 pm »
The probe looks totally fake.  If I were you, I would Initiate a claim on eBay to get the money back.
 

Offline David Hess

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #745 on: May 29, 2017, 12:11:55 pm »
I suspect Texas of China either makes these probes for Keysight or someone else OEMs them for both.  Except for the color, they look exactly like the ones shown at the bottom of the Texas page for their readout probes.

There are other Keysight/Agilent probes which look like other probe models from Texas as well.
 

Offline serggio

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NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #746 on: May 29, 2017, 12:28:36 pm »
I don't know, is this fake or not, I do not have access to Keysight office for take same probe and compare it...
Would be appreciate, if somebody will do picture inside same "original one" probes. It supplied with DSOX3000 series scopes.

But it not big deal to soldering shield caps to body. Now, no problem with noises when I touch it.



Seems, I'm pretty lucky with Keysight's probes  ;D

Just interesting, how much different this one from original one Keysight N2140A, supplied with DSOX1000

May be I live in past, but when I pay my money for Brand name products like Fluke, Keisight (Agilent/HP), I expect quality...
Quality at all...
But now it far away from real world  :(
Marketing experts often VP at technical companies, they looking for are way how to economize money for production in China, sell shit and have salary with five zeros after comma:--
« Last Edit: May 29, 2017, 01:18:56 pm by serggio »
 

Offline David Hess

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #747 on: May 29, 2017, 02:26:10 pm »
Keysight is not the only one selling remarked Texas probes; other DSO manufacturers use them also.

 

Online Monkeh

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #748 on: May 29, 2017, 03:05:50 pm »
I solder better drunk. And I clean things.

Dear Keysight: WTF?
 

Offline Bud

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Re: NEW 100MHz Keysight Scope Release on 1st March 2017
« Reply #749 on: May 29, 2017, 03:23:49 pm »
China. Nuff said.
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