[Gabriele, Jenne]

I've noticed a few times today that when we reduce the 45MHz modulation depth, we see more buildup in both the carrier and the 9MHz in the PRC. 

We expect that, if we start with a modulation depth of 0.2 and reduce by 3dB, we should see about 0.5% 1% more carrier.  But, it looks like we're getting 2% more.  Also, I don't think we should expect any more actual 9MHz to be coming out of the PSL, since we're not changing that modulation depth. 

So, I wonder if we have an offset in one of our length loops that is using the 45MHz sideband, and when we reduce the modulation depth, we reduce the size of the offset.  Perhaps it comes from RAM, perhaps it comes from elsewhere?