Ham It Up - 125MHz 0.5PPM TCXO Upgrade Module for Ham It Up v1.2+ Mornsun LMF200-23B15 AC/DC 200W Enclosed Switching Power Supply What does 5% tolerance mean

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Ham It Up - 125MHz 0.5PPM TCXO Upgrade Module for Ham It Up v1.2+ Mornsun LMF200-23B15 AC/DC 200W Enclosed Switching Power Supply What does 5% tolerance meanHam It Up 125MHz 0. 5PPM TCXO Upgrade Module for Ham It Up v1. 2+ The Ham It Up 125MHz 0. 5PPM TCXO Upgrade Module is a precision frequency reference enhancement designed for amateur radio enthusiasts and RF engineers who demand superior frequency stability in upconverter applications. This module replaces the standard oscillator in Ham It Up v1. 2 and later versions, delivering exceptional 0. 5 parts per million (PPM) temperature compensated accuracy