User Guide

RH-53/54

Nokia Customer Care

58 COMPANY CONFIDENTIAL ISSUE 1 09/2004

RFMD FEM logic

Table 14: RFMD FEM logic

Analog Power control signals (TXC, VPC, VDET)

The pictures in the following page show the typical shapes of the control signals low band, right

side it for highest power – left side for lowest power. In all the pictures TXP is used a the trigger

point and is seen in the top of each picture. The difference between the high band and the low

band is that he high band signals looks the same with only small changes in level. The activat-

ing of high band Vdet starts 5us earlier than for low band.

Vtx BS VC1 VC2

Mode VTX_B_P VTX_B_P Vant1 Vant2

Idle 0 0 0 0

Low Band RX 0 0 1 0

Low Band TX 1 0 1 0

High Band RX 0 1 1 0

High Band TX 1 1 1 0