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CC2564MODA: CC2564MODA certification

German Chykun
Prodigy 40 points

Part Number: CC2564MODA

Dear Sr/Mrs.

We are trying to certify CC2564moda in our custom application.

We have to do FCC tests with two-way radiated (with chip antenna) and conducted (with SMA cable) in countries Corea, Taiwan, China,Mexic.

We have started with this page https://processors.wiki.ti.com/index.php/CC256x_FCC_Testing_Guide#Introduction and with HCI tester we are capable to send message to both CC2564moda successfully ( in our custom application we have two of them in the same PCB, master and slave)

The problem is sometimes the frequency that should be given by module is not the exact one we want. For example

Example 2. GFSK, PN9, 78 (2479 MHz), 15:

FCCspec2.jpg

We send test commands with HCI TESTER by UART, and in some pcbs for example with master we have similar signal, but with slave the signal is shifted (to 20 channels left and doesn't have the same amplitude)

We send this commands:

Send_HCI_Enable_Device_Under_Test_Mode

Wait_HCI_Command_Complete_Enable_Device_Under_Test_Mode_Event 5000, any, HCI_Enable_Device_Under_Test_Mode, 0x00

# Example 2. GFSK, PN9, 78 (2479 MHz), 15

Send_HCI_VS_DRPb_Tester_Con_TX 0xFD84, 0x01, 0x00, 0x4E, 15, 0x00000000, 0x00000000

Wait_HCI_Command_Complete_VS_DRPb_Tester_Con_TX_Event 5000, any, HCI_VS_DRPb_Tester_Con_TX, 0x00

Any help and extra information to solve our problem (frequency shifting ) will be appreciated.

Regards,German

 

  • 0
    TI__Mastermind 27145 points

    Hi,

    We will look into it and get back to you ASAP. Please bear with us.

    Thanks,

    PM

  • 0 in reply to PM
    TI__Mastermind 27145 points

    Hi,

    Would it be possible to test in CW-UnModulated mode to test the Frequency Accuracy of the carrier? Please note that you may need to set the Spectrum Analyzer Span to 10KHz for better frequency resolution. Please check at Low Freq (Channel), Mid Freq and High freq setting. Please test both Master and Slave devices.

    Are you using TI's C2564MODA Modules?

    Thanks,

    PM

  • 0 in reply to PM
    Prodigy 40 points

    We are using two TI's C2564MODA Modules. We don't know right command to set the CC2564moda to test CW-UnModulated mode. Please, if you can please provide valid command to do that

    To connect antenna we are using ufl to sma cable connected this way:

    We are using UART flow control with 4 cables  and HCI tester to send the commands, whenever we send the command HCI tester confirms proper getting of the command with success status

    Below I'll explain the problem more precisely.

    If I test example 2 with this commands:

    Send_HCI_Enable_Device_Under_Test_Mode

    Wait_HCI_Command_Complete_Enable_Device_Under_Test_Mode_Event 5000, any, HCI_Enable_Device_Under_Test_Mode, 0x00

    # Example 2. GFSK, PN9, 78 (2479 MHz), 15

    Send_HCI_VS_DRPb_Tester_Con_TX 0xFD84, 0x01, 0x00, 0x4E, 15, 0x00000000, 0x00000000

    Wait_HCI_Command_Complete_VS_DRPb_Tester_Con_TX_Event 5000, any, HCI_VS_DRPb_Tester_Con_TX, 0x00

    In master I will get this type of signal (1 channel shifed):

    If i will send the same command with smaller power level -> the frequency is right 2479MHz. There is another problem with some pcb if the power is 15 the frequency is shifted (from 1 to 20-25 channels), but if the power is 12 the frequency is fine (wiith less power leve obvioulsy), like in this case:

    With same commands and 15 lvl of power the device (SLAVE) don't send frequency in any band. With other pcb the signal could be shifted (ont to 25 channels)

    But with 12 lvl of power the slave give me shifted signal 2.5029GHz

    Also if I resend the command with 12 power level the signal could move a little bit (more o less then one square to right or left)

  • 0 in reply to German Chykun
    TI__Mastermind 27145 points

    Hi,

    Please refer to the following post. It seems  you have a similar issue.

    https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/632013

    Thanks,

    PM