User Manual

The system is designed to only use the 20 MHz occupied BW capacity. Data rates MCS0 to MCS7 conform to amendment
IEEE802.11n-2009.
Data transmission from the IEEE transceiver is initiated by the IEEE 802.11 compliant MAC software. The source of data
to transmit can either be user supplied data (from the host systems) or network control packets (ACK’s CTS, PSPoll,
ProbeRequest etc). The transmitter is only active during the transmission of one of the packets previously mentioned.
2.2 Bluetooth transceiver description
The Bluetooth subsystem is built on the Texas Instruments BRF6450 ; a single-chip CMOS, Bluetooth® 2.1-compliant,
Enhanced Data Rate (EDR) capable, stand-alone baseband processor with an integrated 2.4-GHz transceiver. The BRF6450
transceiver uses the Bluetooth SIG standard Host Controller Interface (HCI) via 4-Wire HighSpeed UART and PCM audio
interfaces. The BRF6450 incorporates all Bluetooth 2.1 features including eSCO, AFH, and support for collaborative
coexistence with WLAN devices.
The Bluetooth transceiver uses a single independent antenna that is common with the IEEE Transceiver.
The Bluetooth transceiver is built with a Bluetooth Class 1.5 specification RF output power (approx +6 dBm, for an approx
50meter range).
The Bluetooth transceiver uses Bluetooth compliant frequency hopping spread spectrum to cover 79 channels 1 MHz wide
from 2.402 GHz to 2.481 GHz.
The Bluetooth transceiver supports Bluetooth Basic data rates of 1 Mbps (GFSK) as well as Enhanced Data Rates of 2 Mbps
(π/4-DQPSK) and 3 Mbps (8-DPSK)
Data transmission from the Bluetooth transceiver is controlled by software in the baseband processor.
2.3 Simultaneous operation
Simultaneous operation of the WL1273 and BRF6450 transmitters is not possible when WiFi is operating on 802.11bgn (2.4
GHz). While in operation, coexistence is always enabled. This arbitrates packets so that WiFi and Bluetooth packets
are alternately transmitted. That is the transmissions are time division multiplexed.
The test tool does not allow simultaneous transmitter operation of 802.11bgn or 802.11an and Bluetooth.