To use the spectrum analyzer to check that your data looks ok, do the following:
Plug the spectrum analyzer into cable rach 4 IF output (3rd chassis from te top). On the spectrum analyzer, 1st, hit:
freq -> 750 -> MHz
then...
span -> 500 -> MHz
You will see a flipped spectrum. You can now move the cable to rack 6 IF output (pola B) and check that it looks the same. Appendix ??? has a description of the downstairs racks.