TACAN transmissions take place on 252 frequency channels:
126 channels in X mode, called "X channels", numbered 1X to 126X
126 channels in Y mode, called "Y channels", numbered 1Y to 126Y (0.05 MHz offset from the "X channels".
Channel separation is 1 MHz.
Each channel consists of a beacon transmit frequency between 962 MHz and 1213 MHz and a beacon receive frequency, between 1025 MHz and 1150 MHz.
TACAN bearing informaton is more accurate than VOR bearing information; this is a function of the transmitted characteristic, not the receiver selectivity.