Specifications
CM-X300 CoM
22 CM-X300 Reference Guide Rev 1.31 30-Dec-2010
3.3.3.1 Wireless LAN Specifications
CM-X300‘s Bluetooth RF specifications are listed in Table 12.
Table 12 Bluetooth RF System Specifications
Parameter
Test Condition
Typical Value
Units
Transmit Power Output
3
dBm
Receive Sensitivity
1 Mbps, 0.1% BER
-84
dBm
2 Mbps, 0.1% BER
-87
dBm
3 Mbps, 0.1% BER
-80
dBm
Initial Carrier Frequency
Tolerance
5
kHz
Drift Rate
10
kHz
Drift (single slot packet)
10
kHz
Drift (five slot packet)
13
kHz
Carrier Frequency Drift
Rate, DH5
13
kHz
Δf1avg Maximum
Modulation
165
kHz
Δf2max Minimum
Modulation
168
kHz
Δf2 avg /Δf1 avg
1.02
20dB Bandwidth
654
kHz
3.3.3.2 Bluetooth Antenna Configuration
CM-X300 provides two possible Bluetooth antenna configurations. By default, an onboard
WLAN antenna ANT1 is assembled. There is also a U.FL socket J1 for connecting an
external 2.4GHz antenna. See the CM-X300 Top View Diagram on page 13. For the best
performance, the onboard antenna should be disconnected if an external antenna is in use.
This may be accomplished by disassembling the serial 0R resistor R61.
3.3.4 LAN Port
The LAN port (configuration option ‗E‘) is implemented with a Davicom DM9000A
ethernet controller. This is an ETH1 port on the CAMI. LAN port signals are listed in Table
13.
Table 13 LAN port signals
CM-X300 Signal
Name
Type
Description
{ETH1-TDP, ETH1-
TDN}
A
Transmit Differential Pair. The transmit differential pair sends serial bit
streams to the unshielded twisted pair (UTP) cable. The differential pair is
a two-level signal in 10BASE-T (Manchester) mode and a three-level
signal in 100BASE-TX mode (MLT-3). These signals interface directly
with the isolation transformer.
{ETH1-RDP, ETH1-
RDN}
A
Receive Differential Pair. The receive differential pair receives the serial
bit stream from an unshielded twisted pair (UTP) cable. The differential
pair is a two-level signal in 10BASE-T mode (Manchester) or a three-level
signal in 100BASE-TX mode (MLT-3). These signals interface directly
with an isolation transformer.
ETH1-LINK-ACT#
O
In LED mode 1, it is the combined LED of link and carrier sense signal of
the internal PHY. In LED mode 0, it is the LED of the carrier sense signal
of the internal PHY only.
ETH1-SPEED#
O
Its low output indicates that the internal PHY is operated in 100M/S, or it
is floating for the 10M mode of the internal PHY.