Products > Test Equipment

First picture on EEVblog of the new R&S MXO4 series oscilloscope :)

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shabaz:
Hi,
(Hopefully people are not bored of looking at 'scope traces - I just thought these ones looked nice).
I was working on a little project today, and by chance there was a good reminder to me that it is well worth checking at higher frequencies, for spurious emissions.
The first screenshot (ac-before-modification.jpg) shows the problem, which was occurring with a BJT+transformer oscillator. I used the normal 'scope probe supplied with the MXO 4, connected to the output.
That screenshot shows that visible parts of the anomaly could be spotted and zoomed-in, but the log-frequency-axis spectrum analysis was handy to see both the fundamental (25 kHz) and harmonics, as well as all manner of spurious content around 30 to 90 MHz.

I had some small ferrite cores, I put them into the base of the transistors, and then the situation was greatly improved, as can be seen in the second screenshot.

The photo shows the ferrite cores.

Martin72:

--- Quote from: Wolfgang on August 13, 2023, 06:22:52 pm ---Hi Martin,

the ENOB test oscillator schematics is at the bottom of the ENOB page.

regards
  Wolfgang

--- End quote ---

Hi Wolfgang,
Thank you for adding also the gerber files on the ENOB page.  :-+
I´ve ordered the pcb (JLCPCB) and now...
...it ready for the first test.  8)

Bernd_2:
I'm thinking of buying the MXO4 Bundle and have read the Specs and the Manual.

What I'm missing is the XY-Mode that is standard even with the RTC1000. Does anybody know if the XY Mode will be implemented? And if so with Z-Mode?

And I wonder if the Zone Key means Zone-Trigger an will set to work soon.

Martin72:
7789€ incl. VAT for the 200Mhz ? This must be a fake...

https://www.galaxus.de/en/s4/product/rohde-schwarz-mxo44-242-mixed-signal-table-oscilloscope-4-channel-analogue-analogue-digital-200mhz-d-23916761

ebastler:

--- Quote from: Martin72 on November 02, 2023, 09:35:06 pm ---7789€ incl. VAT for the 200Mhz ? This must be a fake...

https://www.galaxus.de/en/s4/product/rohde-schwarz-mxo44-242-mixed-signal-table-oscilloscope-4-channel-analogue-analogue-digital-200mhz-d-23916761

--- End quote ---

Dunno... that seller is a Swiss company originally. Maybe there is some re-importing happening, and prices in Switzerland are lower? (Ha ha, not according to my experience travelling there...  ;))

Galaxus sell pretty much everything. The only time I ordered something from them (a Swiss-made household product which was not available elsewhere), they eventually canceled the order four weeks later, stating that the manufacturer had discontinued the product. They were polite and apologetic about it though and refunded my pre-payment right away.

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