Nokia RM-42 Service Manual page 469

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and the power control voltage is kept constant by a capacitor integrated to N7501 Tx ASIC. When the active part

of the burst is over, the loop is again closed and the power is ramped down. The TXA signal is disabled during

GMSK transmission.

Power control loop is enabled and disabled by writing an appropriate register in N7501 RF ASIC. In case of dual

slot transmission, the output power is ramped down between the consecutive slots.

Figure 126 GSM/EDGE power control topology and control signals

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