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ES9038Q2M Board
ES9038Q2M Board
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Old 15th January 2021, 07:43 PM   #6511
kozard is offline kozard
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Join Date: Mar 2012
So I would like your opinions. Are the enclosed results indicative of a suitable measurement level for looking at the supplies on the ES9038Q2M and AK4396 boards? I think these noise levels are far below that of the regulators that are installed on these boards? (The noise levels, not the 1kHz test sine wave.)

Would the measurements be considered meaningful and worthwhile? In case it is not obvious the 1kHz is a test signal that is being put through a 60 dB attenuator to test the 60 dB gain LNA. The 1kHz generator is of course producing the normal assortment of harmonics.

Last edited by kozard; 15th January 2021 at 07:50 PM.
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Old 15th January 2021, 07:54 PM   #6512
bohrok2610 is offline bohrok2610  Finland
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Most supplies have noise well above your measurement limit, so go ahead. I have no experience on those boards so I'll leave the "meaningful and worthwhile" part for other members.
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Old 15th January 2021, 08:04 PM   #6513
syn08 is offline syn08  Canada
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Quote:
Originally Posted by bohrok2610 View Post
Sorry Sherlock, you got that wrong. In post #6501 SB0490 has increased LF response when paired with the LNA.
Dear Watson, I can't tell more without seeing the schematics. That's "normal", I would think.
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Old Yesterday, 02:20 PM   #6514
Markw4 is offline Markw4  United States
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Quote:
Originally Posted by kozard View Post
...Would the measurements be considered meaningful and worthwhile?
Might depend on who is doing the considering.

Also, might depend on what you find. Say, if you find a problem and fix it, then maybe it will have been worthwhile for you
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Old Today, 01:22 AM   #6515
1z2a3y is offline 1z2a3y  United Kingdom
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No need for any measurements here at DIYA. Amir over at ASR has done an ABSOLUTELY SUPERB job at utilizing SUPERB tools and techniques to extract and present statistical data (metrics) in a SUPERBLY-standardized manner.
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