Which line contains the IFFON/IFFOFF, IFPID, PIDON, FSCL group?

• A. Line P
• B. Line O
• C. Line N
• D. Line M

Answer: (A)

Think about how PMG Module C groups signals by function. IFFON/IFFOFF control turning the identification system on and off, IFPID and PIDON relate to identification and paging/pattern-related functions, and FSCL handles a frequency/selection aspect. These four controls are tied to the same functional area, so in the diagram they’re wired to the same line to be activated together during typical operations. When you look for the line that carries this exact cluster of signals, you’re identifying the line that serves that identification and control group. The other lines on the diagram will host different signal groupings that don’t include all four of these controls at once. Thus, the line that contains that complete set of IFF-related and FSCL signals is the correct line.