The signal processor gets bearing information from the
receiver/processor and changes it to digital signals. The
signal processor does these functions:
· Uses time measurement logic and the bearing information to calculate the intruder airplane range and bearing
· Detects the mode C or mode S pulses
· Controls the suppression circuit to send the suppression
pulse when TCAS transmits
· Makes all signals necessary to receive and transmit mode S and ATCRBS interrogations through the receiver/transmitter circuits.