Nokia RH-29 Series Manual page 32

RH-29
6b - RF Troubleshooting
Antenna Switch
The Antenna Switch works as a diplexer between RX and TX Bands. Moreover, it partly
suppresses the harmonics generated by the PA. Mjoelner RF ASIC controls the antenna
switch by two voltages Vcont1 and Vcont2. The following table shows the different
states.
Vcont1
[Volt]
0
0
0
2.7
Z604 input
EGSM900
Vcont2
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Company Confidential
Vcont2 EGSM
DCS RX
[Volt] RX
0 X
0 X
2.7
0
Figure 13: Antenna Switch Test Points
Z602 input
DCS1800 RX
Copyright © 2004 Nokia Corporation
Company Confidential
Nokia Customer Care
EGSM
DCS TX
TX
X
X
Vcont1
Antenna
Switch input
Issue 1 05/2004