Elecraft K144XV Install & Operation Manual Errata - Manual (Page 2)

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3. Page 19, Frequency Calibration:
With the K144 XV Reference Oscillator Phase Lock option installed, you no longer need to calibrate the two
crystal local oscillators in the K144 XV module as described. Once the proper settings are made in the CONFIG
menu, the calibration occurs automatically as both oscillators are phase locked to the master K3REF oscillator
in the K3. Enable the calibration as follows:
Be sure you have K3 Firmware ver. 4.42 or later installed.
Tune the K3 to any frequency in the 2-meter band.
Hold C O N F I G to access the CONFIG menu and select XVn OFS , where n is the transverter number
you assigned to the K144XV (see Enabling the K144XV Module on pg. 16).
Tap the 0 switch until you see REFLOCK on the K3’s LCD. The automatically calculated offset will
appear in upper half of the K3’s LCD. This enables reflock for both the 144 and 146 MHz band
segments. You don’t have to repeat the procedure for each segment.
If the K3 EXREF option is also installed, the K3’s reference oscillator itself will be
automatically calibrated by the external 10 MHz reference. In this case, enabling REFLOCK for
the K144XV module will allow the K144XV frequency to track the external reference. The
accuracy of the 2-meter frequency will be less than that on HF by a factor of about two, due to the
higher frequency of the K144XV local oscillators.