The K3EXREF option locks the K3 or K3S reference oscillator frequency to an external 10 MHz source by automatically controlling the REF CAL function. While locked to the external source, the reference oscillator frequency is maintained within 2 Hz.
External Frequency Reference
What organisations does hamradiostore.co.uk support?
hamradiostore.co.uk supports uksmg.org see how here
Charities description: Welcome to the UKSMG
Causes supported by uksmg.org
hamradiostore.co.uk supports rsgb.org see how here
Charities description: Welcome to the Radio Society of Great Britain, the UK national amateur radio organization - GB2RS News, RadCom, Clubs, Education, Forums, Shop and lots more
Causes supported by rsgb.org