This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC430F5137:RF frequency band shift

Part Number: CC430F5137
Other Parts Discussed in Thread: TEST2

Hi,

We manufacture low power consumption devices using the CC430F5137 product. We have 2 devices communicating with each other.The receiver responds to the signal sent by the transmitter.Sometimes the transmitter sends signals and we observe that the receiver is not responding .When we watched the signal in the RF spectrum device, we observed that it was broadcasting as 868,065 Mhz instead of 868 Mhz. We're investigating the possibility that this shift could cause the error.

I sent you the screen of the spectrum device.

I give below the RFsetting register values of the receiver and transmitter.

We use “ECS-260-18-30BQ-DS” as crystal. We are waiting for your opinions about our crystal selection.

I look forward to your suggestions for solutions.

Thank you.

RF_SETTINGS rfSettings = {
    0x08,   // FSCTRL1   Frequency synthesizer control.
    0x00,   // FSCTRL0   Frequency synthesizer control.
    0x21,   // FREQ2     Frequency control word, high byte.
    0x62,   // FREQ1     Frequency control word, middle byte.
    0x76,   // FREQ0     Frequency control word, low byte.
    0x9A,   // MDMCFG4   Modem configuration.
    0x83,   // MDMCFG3   Modem configuration.
    0x93,   // MDMCFG2   Modem configuration.
    0x22,   // MDMCFG1   Modem configuration.
    0xF8,   // MDMCFG0   Modem configuration.
    0x00,   // CHANNR    Channel number.
    0x34,   // DEVIATN   Modem deviation setting (when FSK modulation is enabled).*35
    0x56,   // FREND1    Front end RX configuration.
    0x10,   // FREND0    Front end TX configuration.
    0x10,   // MCSM0     Main Radio Control State Machine configuration.*10
    0x16,   // FOCCFG    Frequency Offset Compensation Configuration.
    0x6C,   // BSCFG     Bit synchronization Configuration.
    0x43,   // AGCCTRL2  AGC control.
    0x40,   // AGCCTRL1  AGC control.
    0x91,   // AGCCTRL0  AGC control.
    0xE9,   // FSCAL3    Frequency synthesizer calibration.
    0x2A,   // FSCAL2    Frequency synthesizer calibration.
    0x00,   // FSCAL1    Frequency synthesizer calibration.
    0x1F,   // FSCAL0    Frequency synthesizer calibration.
    0x59,   // FSTEST    Frequency synthesizer calibration.
    0x81,   // TEST2     Various test settings.
    0x35,   // TEST1     Various test settings.
    0x09,   // TEST0     Various test settings.
    0x47,   // FIFOTHR   RXFIFO and TXFIFO thresholds.
    0x2E,   // IOCFG2    GDO2 output pin configuration.
    0x2E,   // IOCFG0    GDO0 output pin configuration. Refer to SmartRF® Studio User Manual for detailed pseudo register explanation.
    0x04,   // PKTCTRL1  Packet automation control.
    0x04,   // PKTCTRL0  Packet automation control.*
    0x00,   // ADDR      Device address.
    0x18    // PKTLEN    Packet length.
};

**Attention** This is a public forum