User's Manual

Boomer II User Manual & Integrator’s Guide _________________________________________________Installation
BM210012WT26 43 Wavenet Technology
of metal used for the ground plane for an antenna can improve the
antenna gain and the coverage area for the system.
If your device is designed to sit on a surface, the antenna should be
positioned as far from the bottom of the device as possible. This is to
reduce the radio frequency reflections if the device is placed on a metal
surface.
If your device is hand held or is worn next to the body, the antenna
should be positioned to radiate away from the body.
The integrator should refer to the statement of Compliance on page 12
of this manual and Regulatory Requirements section on pages 23-27
for country requirements.
SAR Routine Function
The modem complies with OET Bulletin 65 and Supplement C (Aug
1997) for FCC Specific Absorption Rate (SAR) requirements. A SAR
limiting function is available for end user applications to limit the
average transmitted power by preventing new user data transmissions
until the previous period’s average transmitted power is less than the
required SAR level.
During all transmission times a Retransmit Delay Accumulator is
incremented by a value of:
time Td = Duty Factor constant x actual time of block.
The Duty Factor is a ratio of non transmit to transmit time:
= (100 – DutyCycle%) / DutyCycle%
When the current data block and any retries have been sent, the next
user data transmission is inhibited, dependent on the required duty
cycle and the last transmission time. User data to be transmitted will be
accumulated in a data buffer.
When not transmitting, the Retransmit Delay Accumulator decrements
until the timer has expired.
The transmit may restart again, if there is data to send.
The default setting of the modem is 10% Duty Cycle unless otherwise
programmed in the factory at the time of modem manufacture. Once set
in the factory the user has no ability to change this value to ensure
compliance with FCC SAR requirements.