Quatech 802.11B/G Especificaciones descargar pdf (Pagina 17)

2 – Airborne Wireless LAN Node Module

100-8004-102G Airborne Wireless LAN Node Module Data Book

Page 11

Quatech, Inc. Confidential

2.4.7 Transmit/Receive Switch

The Transmit/Receive (T/R) Switch selects the appropriate signal path for the antenna during

transmit and receive operations. The IEEE 802.11 MAC controls the T/R Switch automatically.

2.4.8 A/B Diversity Switch

The A/B Diversity Switch controls whether Antenna 1 (J1) or Antenna 2 (J2) is selected. The

IEEE 802.11 MAC controls the A/B Diversity Switch automatically when diversity is enabled.

Diversity is limited to receive only (no transmit). The default configuration for the module is a

single antenna configuration.

Note:

In a single antenna design, the J2 antenna connection should be used and

the A/B Diversity switch will automatically select this antenna.

2.4.9 External Antenna Connections

The Module provides two U.FL-style connectors for connection to external antennas. The two

external antenna connectors provide 50 Ω impedance RF signals at 2.4 GHz and offer receive

diversity support for OEM system implementations.

2.4.10 Power Supply

The Module requires a single 3.3 V power source (Tolerance: ±5%). The power source must

provide sufficient current for peak startup inrush and peak transmit burst in accordance with the

Module’s specifications (see page 8).

The Module includes an on-board regulator that derives 2.5 V for the Analog Converter.

The 2.5 V is provided as a reference source for analog input signals.

Caution

The 2.5 V source is for reference only and must not be used to power

devices.

2.4.11 High Speed UART Configurations

 Baud rate parameters: 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800,

38400, 57600, 115200, 230400, 460800, 921600 bps

 Flow control parameters:

− Hardware handshake: supports CTS and RTS

− Software handshake: supports XON and XOFF

− No flow control

2.4.12 SPI Configurations

There are no user-configurable parameters.

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