Radio Terminals
P
P
P
set
P
out
P
out
P
Transmit power
P
ATPC max
ATPC min
fix min
max
5647
RTPC mode ATPC mode
Figure 80 Transmit power control
4.7.1 RTPC Mode
In RTPC mode the transmit power (P
out
) ranges from a minimum level (P
fix min
)to
a maximum level (P
max
). The desired value (P
set
) can be set in 1 dB increments.
4.7.2 ATPC Mode
ATPC is used to automatically adjust the transmit power (P
out
) in order to
maintain the received input level at the far-end terminal at a target value. The
received input level is compared with the target value, a deviation is calculated
and sent to the near-end terminal to be used as input for possible adjustment
of the transmit power. ATPC varies the transmit power, between a selected
maximum level (P
ATPC max
) and a hardware specific minimum level (P
ATPC min
).
91
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
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