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Congratulations. The ultra is a great work.
I wobbled it until 3.2GHz to see, where are the best positions for setting the leveloffset correction points. The courve is mostly linear and only less points are mandatory for a correction as exact as possible. Only 3 frequencies stood out: 244MHz, 488MHz and 651MHz. At these frequencies are measurement problems. If I activate the spur correction manually they go away but the automatic spor correction doesn't activate it.

Now I would like to optimize the correction table. In the normal tinysa there has to be a point for 30MHz. Is there any frequency for the ultra which has to be present in the table, too?

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Klaus, DL5KV

On Fri, Dec 9, 2022 at 02:49 AM, Klaus W?rner wrote:

Now I would like to optimize the correction table. In the normal tinysa there has to be a point for 30MHz. Is there any frequency for the ultra which has to be present in the table, too?

In the ultra there are multiple correction tables, if there is a 30 MHz point in the table it can not be removed and correction at 30MHz must be zero.
?
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Thanks, so it's just like the old.
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Klaus, DL5KV

Now I optimized the calibration points and calibrated with a R&S SMA100A. After Calibration I wobbled it. The SMB100A can only operate to 3.2GHz.
The wobble results after self-calibration:


The results after optimizing and calibration with the SMB100A:

It's very good.
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Klaus, DL5KV