First If Amplifier; First If Filter - Nokia 9000i Service Manual

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Technical Documentation
Parameter
IIP3 GSM
PCN
LO – RF isolation
LO power level

First IF amplifier

The first IF amplifier is a bipolar transistor amplifier.
Parameter
Operation frequency GSM
PCN
Supply voltage
Current consumption GSM
PCN
Insertion gain GSM
PCN
Noise figure GSM
PCN
IIP3 GSM
PCN
Input impedance
Output impedance GSM
PCN

First IF filter

The first IF filter is a microstripline filter in PCN. In GSM the first IF filter is
a SAW filter. The IF filter rejects some spurious and blocking signal
coming from the front end of the receiver.
Amendment 1 04/97
Minimum Typical /
Nominal
2 5
2 5
15.0
3
Table 6. 1st IF amplifier specification
Minimum Typical /
Nominal
71
313
4.27 4.5
12
5.5
18 20
12 14
3.5
2.5
–5 –3
–5 –3
RAE/RAK–1N
Maximum Unit / Notes
dBm
dBm
dB
dBm
Maximum Unit / Notes
MHz
MHz
4.73 V
15 mA
10 mA
22 dB
18 dB
4.0 dB
3.0 dB
dBm
dBm
matched to the mixer
matched to the filter
matched to the mixer
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