Frequency Calibration

A frequency calibration is required at every new board. To perform a frequency calibration, the following items are required:

• A VHF/UHF band spectrum analyzer
• A coaxial cable to connect the TTC output to the spectrum analyzer (with a MCX male connector/adapter at one end of the cable)
• A computer with Code Composer Studio installed

Instructions

1. Connect the TTC output to the spectrum analyzer using a coaxial cable
2. Power-on the TTC board using these instructions.
3. Wait for a packet transmission and measure the center frequency of the captured signal in the spectrum analyzer.
4. If the measured frequency meets the specified frequency, the calibration procedure its done. Otherwise, change the defined value in the line 58 of the file <drivers/radio/rf4463/rf4463_config.h> (here), until the center frequency of the signal reaches the desired value.

NOTE 1: The calibration parameter of the downlink/uplink radio can be found here.

NOTE 2: The calibration parameter range is 0 to 255.