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Rf205x calibration user guide

AN RFMD REFERENCE MANUAL RF x Calibration User Guide Integrated Con ?gurable Components from RFMD Multi-Market Products Group RF MICRO DEVICES RFMD Optimum Technology Matching Enabling Wireless Connectivity PowerStar POLARIS TOTAL RADIO and UltimateBlue are trademarks of RFMD LLC BLUETOOTH is a trademark owned by Bluetooth SIG Inc U S A and licensed for use by RFMD All other trade names trademarks and registered trademarks are the property of their respective owners ? RF Micro Devices Inc Thorndike Road Greensboro NC - For sales or technical support contact RFMD at - - or sales-support rfmd com of CRF x Calibration User Guide CONTENTS Introduction Coarse Tuning Calibration VCO Description Calibration Method Calibration Enabled Manual Calibration Method Loop Filter Calibration VCO Gain Calibration Description Setting Up the Device for VCO Gain Calibration Determining the Required Frequency O ?set VCO Operating Frequency Compensation Using the Calibration Tab in the GUI RF MICRO DEVICES RFMD Optimum Technology Matching Enabling Wireless Connectivity PowerStar POLARIS TOTAL RADIO and UltimateBlue are trademarks of RFMD LLC BLUETOOTH is a trademark owned by Bluetooth SIG Inc U S A and licensed for use by RFMD All other trade names trademarks and registered trademarks are the property of their respective owners ? RF Micro Devices Inc Thorndike Road Greensboro NC - For sales or technical support contact RFMD at - - or sales-support rfmd com of CRF x Calibration User Guide INTRODUCTION The basic philosophy behind the RF x product family is to o ?er a high-linearity broadband mixer along with frequency generation capability to support a RF frequency range of approximately MHz to MHz and an IF frequency range of approximately MHz to MHz While many users of the devices will not need to cover the entire frequency range at once for whom automatic calibration will work perfectly well some will this guide is aimed at those users To reliably cover the Local Oscillator frequency range of MHz to MHz it is necessary to calibrate the voltage controlled oscillators VCOs to maintain the loop bandwidth characteristics This document explains how the di ?erent calibration mechanisms included on the chips work to achieve this Two calibration mechanisms are provided on the chip both can be operated either in an automatic mode or under user control In the automatic mode operation is completely transparent to the user The ?rst mechanism is Coarse Tune calibration CT Cal designed to ensure the VCO tank circuit is tuned to the correct frequency The second calibration mechanism is loop ?lter correction designed to tune out the e ?ect of VCO tuning slope variations KV Cal A tab has been provided in the graphical user interface software provided with the evaluation board to enable users to investigate these features and perform the necessary calculations The ??Calibration ? tab RF MICRO DEVICES RFMD Optimum Technology Matching Enabling Wireless Connectivity PowerStar POLARIS TOTAL RADIO and UltimateBlue are trademarks of RFMD LLC BLUETOOTH is a trademark owned by Bluetooth SIG Inc U S A and licensed for use