Hi Everyone reading this Post.
This is Terms in a Brochure of RouterBoard and i donot understand this terms, Please Describe that.

RX sensitivity
802.11a: –93 dBm @ 6Mbps to -77 dBm @ 54 Mbps
802.11n: –93 dBm @ MCS0 to –71 dBm @ MCS7
TX power
802.11a: 31dBm @ 6Mbps to 27dBm @ 54 Mbps
802.11n: 30dBm @ MCS0 to 26dBm @ MCS7
Modulations
OFDM: BPSK, QPSK, 16 QAM, 64QAM
DSSS: DBPSK, DQPSK, CCK

Have you googled these terms? Try it...