When I run a PNoise sim with sources and specify an voltage input on a vsource instance, I am able to look at the input referred noise.  Then, when I change the sim to tdnoise, the input referred noise is not saved.  I made no changes to the schematic nor to any of the settings (other than the frequency range of the pnoise sim).  Why is this?

I am using spectre version 6.2.0.420.  The noise summary seems to work correctly.  I am having trouble retrieving the waveform for the input referred noise when running tdnoise.

Unfortunately, I've already tried that.  The "in" net does not appear in the browser.  I am trying to get the noise of an integrator, so looking at the output noise open-loop is meaningless since the noise has been multiplied by the loop gain.  I've tried closing the loop as was suggested by Kundert in delta-sigma.pdf, but the results are just not making sense.    Thanks anyway for the help.