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Yes, it should work, and I just tried it, but without seeing your .ASC, we can't help much.

Hello,

I am using a voltage set to
SINE(0 1u 50)

which is 1uV 50Hz.

Using transient analysis

.tran 100m?

It does not work. It just outputs / simulates to a straight line sloping from 1nV to -500nV over 100ms

I was sure this did work just yesterday and I got a sine wave as expected.
I suspect it stopped working earlier today after I did an AC analysis.
I have since restarted LTSpice and done a whole new schematic. Same problem.

It does work for bigger amplitudes such as 1V.

Is it supposed to work?

Best regards
Bernt