All cable television systems which operate analog NTSC or similar channels in the frequency bands 108-137 MHZ and 225-400 MHz shall comply with the following frequency separation standards for each NTSC or similar channel:
47 C.F.R. §76.612
The HRC system, as described above, will meet this requirement in the 328.6-335.4 MHz navigation glide path band. Those Incrementally Related Carriers (IRC) systems, with comb generator reference frequencies set at certain odd multiples equal to or greater than 3 times the 0.0125 MHz aeronautical communications band offset, e.g. (6n + 1.250 ±0.0375) MHz, may also meet the 25 kHz offset requirement in the navigation glide path band.