X-BAND X-CHANNEL

The frequency range between 8000 and 12500 MHz. A DME channel. There are 126 X-Channels for DME operation. For the first 63 channels, the ground-to-air frequency is 63MHz below the air-to-ground frequency. For the second 63-X Channels the ground-to-air frequency is 63 MHz above the air-to-ground frequency.