simulating phase noise of differential LC-VCO in spectre

hi, i am wondering how to set up pss and pnoise in spectre. i have a 2.4ghz differential lcvco and i want to mesaure the phasenoise at 1mhz offset. right now the settings i have are as follows and ijust want to make sure htey are correct:

pss:
Beat frequency: 2.4G
# of harmonics: 10
Accuracy: Conservative
tstab: 100n (vco reaches steadystate after ~20ns)
saveinit: yes
oscillator node: Vo+
reference node: Vo- (is this correct or should be /gnd! ?)

pnoise:
sweeptype: default
Relative harmonic: blank (should be 1?)
Start-stop: 0.01M to 100M
Logarithmic sweep, 10 points per decade
Max sideband: 10
Positive output node: Vo+
Negative output node: Vo- (again, is this correct?)
Input source: none

I didnt change any of the additional options for pss/pnoise. If someone could validate or correct my settings, it would be appreciated.

It should be "Mode=Relative","Harmonic No=1"

Other settings are correct.

Thanks. It seems I get the same result using negative and reference node as /gnd! - does this make sense?