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  • Hi Rico:

    From IEEE 802.11:

    DSSS: "15.2.3.3 PLCP IEEE 802.11 SIGNAL field
    The 8-bit IEEE 802.11 SIGNAL field indicates to the PHY the modulation that shall be used for transmission (and reception) of the MPDU. The data rate shall be equal to the signal field value multiplied by 100 kbit/s. The DSSS PHY currently supports two mandatory modulation services given by the following 8-bit words, where the LSB shall be transmitted first in time:
    a) X'0A' (MSB to LSB) for 1 Mb/s DBPSK
    b) X'14' (MSB to LSB) for 2 Mb/s DQPSK

    HR/DSSS: "18.2.3.3 Long PLCP SIGNAL field
    The 8-bit SIGNAL field indicates to the PHY the modulation that shall be used for transmission (and reception) of the PSDU. The data rate shall be equal to the SIGNAL field value multiplied by 100 kbit/s. The High Rate PHY supports four mandatory rates given by the following 8-bit words, which represent the rate in units of 100 kbit/s, where the LSB shall be transmitted first in time:
    a) X?¡é?€??0A?¡é?€?? (MSB to LSB) for 1 Mb/s;
    b) X?¡é?€??14?¡é?€?? (MSB to LSB) for 2 Mb/s;
    c) X?¡é?€??37?¡é?€?? (MSB to LSB) for 5.5 Mb/s;
    d) X?¡é?€??6E?¡é?€?? (MSB to LSB) for 11 Mb/s."

    Apparently the IEEE 802.11 Handbook rearranged a sentence from the standard incorrectly, while the CWAP Study Guide rearranged the same sentence correctly.

    Thanks for the catch.

    I hope this helps. Thanks. /criss

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