The 'Crystal (XTAL) calibration' procedure tunes the TX- and RX radio frequency of the Z-Wave device so as to give the minimum frequency error. This calibration must be carried out on the final crystal which will be used with the Z-Wave device.

Important notes:

• The procedure is performed by Sigma at the factory for all Z-Wave modules as these modules have the final crystal already fitted to them.

• If you are programming SOCs (bare ICs) or 'Bare Die' products, then these devices are NOT pre-calibrated by Sigma at the factory. You will need to perform the procedure on these devices at the customer production programming stage.