WLNG-SE-DP551 Quatech, WLNG-SE-DP551 Datasheet - Page 30

• Manufacturer Part Number: WLNG-SE-DP551
• Description: WiFi / 802.11 Modules & Development Tools WIRELESS DEV SERVER RS-422/485 SUPPORT
• Manufacturer: Quatech
• Series: Airborne™r

Specifications of WLNG-SE-DP551

• Wireless Frequency: 2.48 GHz
• Interface Type: UART
• Modulation: DBPSK, DQPSK, CCK, BPSK, QPSK, 16QAM, 64QAM
• Security: 64/128 bit WEP, WPA, AES, EAP
• Antenna: U.FL
• Operating Temperature Range: - 40 C to + 85 C
• Mfg Application Notes: Transition to DP550 Devices AppNote
• Frequency: 2.4GHz ~ 2.4835GHz
• Data Rate - Maximum: 54Mbps
• Modulation Or Protocol: 802.11 b/g
• Applications: WLAN
• Power - Output: -
• Sensitivity: -98dBm
• Voltage - Supply: 3.3VDC
• Current - Receiving: 310mA
• Current - Transmitting: 240mA
• Data Interface: Connector, 36 Pin Header
• Memory Size: -
• Antenna Connector: U.FL x 2
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Details
• For Use With/related Products: ARM 9, AR6002

Quatech, Inc.
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Link Margin provides a measure of all the parts of the RF path that impact the
ability of two systems to communicate. The basic equation looks like this:
Where:
This is a complex subject and requires more information than is presented here,
Quatech recommends at reviewing the subject and evaluating any system at a
basic level.
It is then possible, with a combination of the above items and an understanding
of the application demands, to achieve a link quality optimized for the application
and host design. It is important to note that this is established with a combination
of hardware selection, design choices and configuration of the radio.
Link Margin (dB) = EIRP – FPL + (RxS + RxA – RxC)
TxP = Transmitter output power (dBm)
TxA = Transmitter antenna gain (dBi)
TxC = Transmitter to Antenna coax cable loss (dB)
FPL = Free Path Loss (dB)
RxS = Receiver receive sensitivity (dBm)
RxA = Receiver antenna gain (dBi)
RxC = Receiver to Antenna coax cable loss (dB)
EIRP (dB) = TxP + TxA – TxC
4/14/2011
100-8090-100