Signal level incorrect, defective LNA?
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The level calibration of my tinysa ultra fails with "Signal level incorrect". The device was ordered from an authorized vendor.
HW firmware is v0.4.5.1 and SW firmware is 1.4-199.
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The device was reset before testing, and two different SMA cables were used.
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I checked the CAL output with another spectrum analyzer and the level and frequency looks fine.
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When generating a sine wave with another device, and changing the output level, the tinySA shows the correct level with different attenuator values, so to me the attenuator looks good too.
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Running the selfest, Test #14 fails with "Signal level Fail":
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This is after running level calibration and selfest:
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leveloffset low -0.0
leveloffset low_output 0.0
leveloffset switch 0.0
leveloffset receive_switch 0.0
leveloffset out_switch 0.0
leveloffset lna 0.0
leveloffset harmonic 0.0
leveloffset harmonic_lna 0.0
leveloffset shift 0.0
leveloffset shift1 -2.7
leveloffset shift2 -2.7
leveloffset shift3 0.8
leveloffset shift4 -0.2
leveloffset drive1 0.0
leveloffset drive2 -1.7
leveloffset drive3 -1.3
leveloffset direct 0.0
leveloffset direct_lna 0.0
leveloffset ultra 0.0
leveloffset ultra_lna 0.0
leveloffset adf 0.0
leveloffset direct_output 0.0
---
correction low 0 10000 12.2
correction low 1 50000 7.6
correction low 2 200000 4.5
correction low 3 400000 2.2
correction low 4 900000 0.4
correction low 5 20000000 -0.4
correction low 6 30000000 0.0
correction low 7 100000000 -0.8
correction low 8 160000000 -0.4
correction low 9 230000000 0.5
correction low 10 290000000 0.3
correction low 11 400000000 1.0
correction low 12 520000000 0.1
correction low 13 600000000 0.5
correction low 14 660000000 0.4
correction low 15 740000000 1.5
correction low 16 790000000 3.0
correction low 17 810000000 4.7
correction low 18 820000000 6.3
correction low 19 830000000 8.7
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Does this look like a defective LNA? If yes, is for U14 the part BGA2817 the correct one?
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Would be great if someone can confirm.
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Thanks
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Kevin
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