Hello Erik and everyone.
I've recently purchased a TinySA Ultra+ from a local vendor and the unit has an issue.
It is a ZS-407 with HW version V0.5.4 and S/N SU-407-25011571.
It has a spur at ~4.275 GHz that is present regardless of the Spur Removal or Sample Rep settings:?
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When I narrow the frequency bandwidth to 100kHz and turn off Spur Removal, I see that the "spur" is actually five pulses:?
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The instrument passes the self test and calibration successfully.
This issue was present in the factory firmware (I believe it was V1.4-195) and is still present after upgrading to the latest V1.4-197.
The vendor has checked a few other units they have in stock and they show the same spur:
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The vendor assures me that the units are genuine and that they get them directly from ZeenKo.
I also have an older TinySA Ultra (up to 5.3 GHz, ZS-405 maybe, it has no model number on it) and it has no such anomalies.
So my questions are:
- Is this device really genuine?
- Is this a known issue?
- Is it faulty hardware?
- How can this be fixed (if it's possible)?
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Thank you!
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Best wishes,
Andrew
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PS: This is the device in question:
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