Alfa Network AIP-W505 User Manual page 94

BW (Channel Bandwidth) — The 11n Router provides a channel
◆
bandwidth of 40 MHz by default giving an 802.11g connection speed of
108 Mbps (sometimes referred to as Turbo Mode) and a 802.11n
connection speed of up to 150 Mbps. Setting the HT Channel Bandwidth
to 20 MHz slows connection speed for 802.11g and 802.11n to 54 Mbps
and 74 Mbps respectively and ensures backward compliance for slower
802.11b devices.
GI (Guard Interval) — The guard interval between symbols helps
◆
receivers overcome the effects of multipath delays. When you add a
guard time, the back portion of useful signal time is copied and
appended to the front.
STBC — Indicates if Space Time Block Coding (STBC) is being used.
◆
STBC is a MIMO mechanism that allows a unit with only one antenna to
leverage multiple antennas on other 802.11n devices to improve
performance and range.
MCS — The Modulation and Coding Scheme (MCS) is a value that
◆
determines the modulation, coding and number of spatial channels.
(Options: value [range] = 0~7 (1 Tx Stream), 8~15 (2 TxStream), 32
and auto (33))
◆ SNR (0/1) — The signal-to-noise ratio value for the MIMO spatial
channels 0 and 1.
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C 8 | WISP Mode Wireless Configuration
HAPTER
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