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# 1.1.3.4.25 DRV_RF215_FSK_MOD_IDX Enum

## C

    typedef enum
    {
        /* modIdx = 1.0 */
        FSK_MOD_IDX_1_0 = 0,

        /* modIdx = 0.5 */
        FSK_MOD_IDX_0_5 = 1,

    } DRV_RF215_FSK_MOD_IDX;

## Summary

Defines the available FSK modulation indexes.

## Description

This data type defines the list of available modulation indexes for the RF215 FSK PHY. The modulation index defines the maximum FSK frequency deviation: fdev = (symRate * modIdx) / 2.

## Remarks

The interpretation of modulation index for 4-FSK is slightly different to 802.15.4 specification. 4-FSK and modIdx = 0.33 (in 802.15.4) is equivalent to 4-FSK and modIdx = 1.0 (in RF215).

For 4-FSK, the RF215 has the following restriction: modIdx >= 1.0.

Rev: G