After Sales
Technical Documentation
RAE/RAK–1N
RF
Page 3– 15
Amendment 1 04/97
Unit / NotesMaximumTypical /
Nominal
MinimumParameter
IIP3 GSM
PCN
2
2
5
5
dBm
dBm
LO – RF isolation 15.0 dB
LO power level 3 dBm
First IF amplifier
The first IF amplifier is a bipolar transistor amplifier.
Table 6. 1st IF amplifier specification
Parameter Minimum Typical /
Nominal
Maximum Unit / Notes
Operation frequency GSM
PCN
71
313
MHz
MHz
Supply voltage 4.27 4.5 4.73 V
Current consumption GSM
PCN
12
5.5
15
10
mA
mA
Insertion gain GSM
PCN
18
12
20
14
22
18
dB
dB
Noise figure GSM
PCN
3.5
2.5
4.0
3.0
dB
dB
IIP3 GSM
PCN
–5
–5
–3
–3
dBm
dBm
Input impedance matched to the mixer
Output impedance GSM
PCN
matched to the filter
matched to the mixer
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.
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