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4IS Power Table

pixbroker
Genius 5820 points


bleUserConfig.c defines a power table for differential front ends with internal and external bias (ID and XD) and one for single ended front end with external bias (XS).

our board uses IS (internal bias, single ended). does the bias impact the power table or can we use the XS power table?

Thanks you.

  • 0
    TI__Mastermind 25035 points
    Hi,

    If you are using single ended then the max output power is 2dBm, if using differential (external or internal bias) the max output power is 5dBm. You should be able to choose the power table accordingly.
  • 0 in reply to Zahid Haq
    Genius 5820 points

    I am aware of the 2dBm limit when using a SE front end configuration. My question was regarding the different register values for 2dBm for the SE and DE power tables.

    for XDE and IDE, the 2dBm is defined as:
    GEN_TX_POWER_VAL( 0x18, 0, 0x4E )

    while for XSE it is:
    GEN_TX_POWER_VAL( 0x29, 0, 0x9C )

    The question we have is if the XSE value can be used for a ISE configuration. There is no mention of ISE while there is for IDE.

  • 0 in reply to pixbroker
    TI__Guru** 106705 points
    Hi Pixbroker,

    The bias does not affect the output power and the same power table should thus be used for XS and IS.

    Best regards,
    Fredrik