ELECRAFT K144XV Bedienungsanleitung PDF herunterladen (Seite 11)

Recalibrating the XV144

When the K144XV Reference Oscillator Phase Lock option is installed, the frequency calibration offset (OFS)

values stored in the K3 must be changed since the K144XV’s two conversion oscillator frequencies are now

locked to the K3 master reference oscillator.

Two simple formulae can be used to calculate the new offset values:

 For 144-146 MHz: XVn OFS value = (116,000,000 – (REFCAL * 2.3491292))

 For 146-148 MHz: XVn OFS value = (118,000,000 – (REFCAL * 2.3896314))

Example:

1. Using the configuration menu (CONFIG:REF CAL), we find the current reference frequency to be

49,379,698 Hz (displayed as 49.379.698 on VFO A).

2. Compute the offset in Hz for the low (144 – 146) XVn OFS value:

 116,000,000 – (49379698 * 2.3491292) = 116,000,000 – 115,999,290 = 710 Hz

 You would then set the XVn OFS value in the configuration menu to the equivalent value in kHz, but

changing the sign of the offset, i.e. -0.71

Note: (n) in XVn OFS is the transverter band number you have assigned to the K144XV internal 2-m

module. Tap 1 through 9 to select the appropriate band. Also, before you set the first offset value, you must

position the VFO somewhere in the 144-145.999 MHz range. Refer to the K144XV installation

instructions.

3. Compute the offset in Hz for the high (146 - 148) XVn OFS value:

 118,000,000 – (49379698 * 2.3896314) = 118,000,000 – 117,999,277 = 723 Hz

 Set the XVn OFS in the configuration menu to -0.72

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ELECRAFT K144XV Bedienungsanleitung Seite 11