Time Division Multiple Access (TDMA), provides a revolutionary enhancement to genuine Motorola battery performance. An additional 40% battery life can be worth an additional 5 hours in the field, which means your radios could complete a whole 12 hour shift without a battery charge, instead of recharging them half way through.
In a typical duty cycle of 5 percent transmit, 5 percent receive, and 90 percent idle, the transmit time accounts for roughly 80 percent of the total current drain on battery life.
Mitigating power wastage during this period is critical. TDMA technology almost halves the power used when compared to FDMA radios, because transmission is effectively cut in half. Two-slot TDMA can thus enable up to a 40% reduction in battery drain, and as a result, overall battery consumption per call is dramatically reduced, enabling much longer usage time in the field. |
How does it work? In digital mode, when in simplex or with a repeater, TDMA transmission occurs in time slots instead of a constant transmission stream which means the radio is only transmitting half the time. As explained in figure 1, the separate slots account for different conversations occurring simultaneously in the same talk path but in alternating slots. If compared to the FDMA signal demonstrated above, you can see that the TDMA function sends signals for half the time, and in alternating slots with another radio, while on the same channel.
The enhancement this system makes to battery longevity means less time charging and more time communicating.
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