# Simple $\sin(2\pi 1000t)$ Fourier transform in PSpice not behaving as expected

So I have this very basic circuit show below which I am simulating with PSpice.

Now, when doing the Fourier transform of $\cos(2\omega1000t)$, I expect to see two impulses(one at -1kHz and one at 1kHz), at half the amplitude of the cosine. The simulated results, however, shows the impulse at 1kHz with an amplitude of just below 1V. This is shown below:

My question is, why is this the case? Why is the amplitude not 500mV? I'm probably just missing something trivial.