Nokia 6340 Manuale Di Servizio
NPM-2NX
System Module
CCS Technical Documentation
Page 64
ãNokia Corporation
Issue 1 07/02
Table 37: Conducted spurious emissions, Receiver
Harmonic and spurious emissions, Transmitter, conducted and radiated
Definitions, methods of measurements and spec limits are defined in IS-137 and
GSM1900
standard. Some highlights:
Table 38: Harmonic and spurious emissions, Transmitter
Maintainability
The basic premise of the serviceability is that all RF components are serviceable except
the PA. This is because of the difficulty of reliably soldering the PA without an additional
solder stencil for the repair centres. This stencil could be provided if the FFR of the PA
becomes an issue. Those components which are under the lip of the shields are, in prac-
tice, unlikely to be field replaceable: these are mainly discrete components which should
have very low FFRs.
the PA. This is because of the difficulty of reliably soldering the PA without an additional
solder stencil for the repair centres. This stencil could be provided if the FFR of the PA
becomes an issue. Those components which are under the lip of the shields are, in prac-
tice, unlikely to be field replaceable: these are mainly discrete components which should
have very low FFRs.
Frequency/MHz
Specification limit/dBm
IS137
Specification limit/dBm
GSM1900 standard
Lowest LO/IF to 6GHz
-47
-57 /-47dBm
Mobile RX
-80
-71dBm
Mobile TX
-60
-53dBm
Frequency/MHz
Specification limit/dBm
IS137
Specification limit/dBm
GSM1900 standard
Lowest spurious to 10*fc
-13dBm
-30dBm
Mobile RX
-80dBm
-71dBm
Mobile TX
-13 dBm or 45 dBc
-36dBm