[MSNoise] SAC header

I have set "maxlag" to be 300 s, so I would like cross-correlations centred on zero, +/- 300 s. Instead, MSNoise is giving me cross-correlations from 0 s to 600 s. In the SAC header B = 0.000000e+00, and E = 6.000000e+02. Why is this happening? How can it be corrected? Thanks in advance, Emily ~~~~~~~~~~~~~~~~~~~~~~~~~ Emily Crowder MSc BSc PhD Student School of Geosciences University of Aberdeen Aberdeen AB24 3UE Scotland Em: emily.crowder(a)abdn.ac.uk ~~~~~~~~~~~~~~~~~~~~~~~~~ The University of Aberdeen is a charity registered in Scotland, No SC013683. Tha Oilthigh Obar Dheathain na charthannas clàraichte ann an Alba, Àir. SC013683.