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Receiver
Reverse direction isolation of LNA inside Transceiver IC suppresses unwanted radiation. Then
RFsignal will bedirectly down to IF signal (RX IQ) and high frequency spurious emissions are
suppressed by LPF. Atlast RX IQ signal will be demodulated digital data.
Base band Processing
1. Channel selection is controlled by
- DSSS (BPSK/QPSK/CCK)
- OFDM (BPSK/QPSK/16QAM/64QAM)
Power Control Level
It uses closed-loop power control function to limit RF output power level.
Transmit/Receive Switch
EUT has
Transmit/Receive Switch and Antenna switch. End user can't select any power setting.
Channel Selection Restriction
For product available in the USA/Canada/Taiwan market, only channel 1~11 can be operated.
Selectionof other channels is not possible. But product also could be available in the
Europe/Japan market,channel 1~13 can be operated under the manufacturer change the different
driver.
Data Rate Control
The operation date rate is changing during data transfer base on the optimization of driver.
Discontinue Transmitting with absence of Data or operational failure states
"The device shall automatically discontinue transmission in case of either absence of information
totransmit or operational failure. These provisions are not intended to preclude the transmission
of controlor signaling information or the use of repetitive codes used by certain digital
technologies to completeframe or burst intervals. Applicants shall include in their application for
equipment authorization adescription of how this requirement is met." Data transmission is
always initiated by software, which isthen passed down through the MAC, through the digital and
analog baseband, and finally to the RF chip.
Several special packets (ACKs, CTS, PSPoll, etc...) are initiated by the MAC. These are the only
waysthe digital baseband portion will turn on the RF transmitter, which it then turns off at the end
of thepacket. Therefore, the transmitter will be on only while one of the aforementioned packets
is beingtransmitted.
Product Details
> Data Modulation OFDM (BPSK / QPSK / 16QAM / 64QAM)
> Frequency : 2.4GHz and 5GHz
> 802.11 a/b/g/n MIMO Type
>Power : +5V ±5% (+4.75V ~ +5.25V)
BBP
IC to support data modulation:
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