6.8 IF Cables

Four cables, designated A, B, C, and D, carry the IF signals from the antenna vertex room to the station control building. Normally only two cables are in use at a time, with the signals from each IF converter transmitted via A and C, or B and D; by convention, RCP is normally carried by IFs A and B, and LCP by C and D. However, switching is available to support other configurations needed for special cases. These include, in particular, certain dual frequency modes that use all four IFs.