RoamAbout Access Points
Frequency Band:
2.4 – 2.83 GHz U.S. (FCC), Canada, Europe (ETSI)
2.4 – 2.497 GHz Japan
Modulation Technique:
802.11b: CCK, DBPSK, DQPSK (DSSS)
802.11g: BPSK, QPSK, 16-QAM and 64-QAM (OFDM)
Media Access Protocol:
CSMA/CA (Collision Avoidance) with ACK
Data Rate:
802.11b: 11 Mbps with fall-back rates of 5.5, 2 and 1 Mbps
per channel
802.11g: 54 Mbps with fall-back rates of 48, 36, 24, 18, 12, 9
and 6 Mbps per channel
Output Power:
RBT-4102:
802.11b/g: 20 dBm across all frequencies (except 19dB at 54 Mbps)
RBT-1002:
802.11b: 15 dBm at 2.412-2.472GHz
802.11g: 20 dBm at 2.412GHz (except at 48 and 54 Mbps output
is 17 and 15dBm)
20 dBm at 2.417-2.467GHz (except at 48 and 54 Mbps
output is 16 and 14dBm)
18 dBm at 2.472GHz (except at 48 and 54 Mbps output
is 15 and 13dBm)
RBT-1602:
802.11b/g: 18 dBm across all frequencies
Receiver Sensitivity 802.11b:
RBT-4102:
-85 dBm at 11 Mbps
-87 dBm at 5.5 Mbps
-89 dBm at 2 Mbps
-90 dBm at 1 Mbps
RBT-1002:
-87 dBm at 11 Mbps
-90 dBm at 5.5 Mbps
-90 dBm at 2 Mbps
-93 dBm at 1 Mbps
RBT-1602:
-85 dBm at 11 Mbps -90 dBm at 2 Mbps
-87 dBm at 5.5 Mbps -94 dBm at 1 Mbps
Receiver Sensitivity 802.11g:
RBT-4102:
-70 dBm at 54 Mbps -84 dBm at 18 Mbps
-73 dBm at 48 Mbps -85 dBm at 12 Mbps
-76 dBm at 36 Mbps -86 dBm at 9 Mbps
-80 dBm at 24 Mbps -88 dBm at 6 Mbps
RBT-1002:
-70 dBm at 54 Mbps -85 dBm at 18 Mbps
-72 dBm at 48 Mbps -86 dBm at 12 Mbps
-77 dBm at 36 Mbps -87 dBm at 9 Mbps
-81 dBm at 24 Mbps -88 dBm at 6 Mbps
RBT-1602:
-71 dBm at 54 Mbps -85 dBm at 18 Mbps
-73 dBm at 48 Mbps -87 dBm at 12 Mbps
-78 dBm at 36 Mbps -89 dBm at 9 Mbps
-81 dBm at 24 Mbps -90 dBm at 6 Mbps
Antennas:
RBT-4102:
Internal dual-band diversity antennas with connectors for optional
external antennas
External antenna connections: 1 reverse polarity SMA connector for
802.11a; 1 reverse polarity SMA connector for 802.11b/g
RBT-1002:
Internal dual-band diversity antennas, no connections for external
antennas
RBT-1602:
Internal dual-band diversity antennas with connectors for optional
external antennas
External antenna connections: 1 reverse polarity SMA connector for
802.11a; 1 reverse polarity SMA connector for 802.11b/g
Power:
Power over Ethernet (DC):
48VDC, 0.27A, 12.96 watts
Transceiver Characteristics for 802.11b/g
Page 8 of 15
(60 pagine)
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