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# 1.1.3.4.26 DRV_RF215_FSK_MOD_ORD Enum

## C

    typedef enum
    {
        /* 2-FSK. Frequency deviations: {-fdev, +fdev} */
        FSK_MOD_ORD_2FSK = 0,

        /* 4-FSK. Frequency deviations: {-fdev, -fdev/3, +fdev/3, +fdev} */
        FSK_MOD_ORD_4FSK = 1,

    } DRV_RF215_FSK_MOD_ORD;

## Summary

Defines the available FSK modulation orders.

## Description

This data type defines the list of available modulation orders for the RF215 FSK PHY.

## 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