6.8 IF Cables

Four cables, labeled A, B, C, and D, carry the IF signals from the antenna vertex room to the station building. Each IF converter normally sends its signals via A and C, or B and D, although switching is available for other possibilities if needed. By convention, the RCP signals are normally carried by IFs A and B, the LCP signals by C and D. Normally only two cables are in use at a time, but certain dual frequency modes, especially 13 cm and 4 cm, can use all four.