User Manual

Boomer II User Manual & Integrator’s Guide
________________________________
___
Appendix A - NCL Interface
BM210012WT09 125 Wavenet Technology
SAR Routine Function
An SAR limiting function is available for end user applications to limit
the average transmitted power by preventing new 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
transmission is inhibited, dependent on the required duty cycle and the
last transmission time. 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.