The TH radio microwave carrier supply system

The TH microwave carrier supply system furnishes all of the carrier frequencies required at a radio repeater station. All the frequencies are harmonically derived from a common, highly stable, 14.82593-MC crystal oscillator, to avoid interference problems. Total reliance on a common generator of carriers for an entire station calls for a highly reliable and adequately protected carrier supply. To this end, a complete standby supply is arranged with fast automatic switching to replace the regular supply when needed. Special emphasis is placed on conservative circuit design, careful selection of components, adequate monitoring and trouble detection facilities, and provisions for routine maintenance.