On 10M {28 MHz} a 0.5 PPM can have +/-14 Hz error while a 5 PPM can have a +/- 140 Hz error. It is the frequency in MHz x the PPM which is Parts Per Million.

My article scheduled for publication in September QST discusses the frequency read out of today's radios and their likely inaccuracy.

73 Bob, K4TAX


On 8/2/2015 4:41 PM, David Ahrendts wrote:
Pros: what is the operating advantage of the KTCXO3-1 1 PPM reference 
oscillator over the standard ‘ol bargain basement 5 PPM ref osc supplied with 
my lovely new K3S?



David Ahrendts   [email protected]




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