User Guide

PAMS
Technical Documentation
NME–3
Technical Information
Page 48
Issue 1 10/99
Diode Mixer Specification
The 1st mixer will be a passive quad diode hybrid as it was used in
CD745.
Table 24. Mixer requirements
Parameter Min. Typ./
Nom.
Max. Unit/Notes
RX frequency range 935 960 MHz
LO frequency range 1006 1031 MHz
LO drive level +6 dBm
IF frequency 71 MHz
Conversion gain –7 dB
NF, SSB 7 dB
IIP3 +13 dBm
1 dB Compression Point +3 dBm
IF/2 spurious rejection 67 dBm, *
LO power level in RF–port –25 dBm
Input matching Mag(S
11
) –9.5 dB
Impedance 50 ohm
IF Amplifier Specification
Table 25. Electrical characteristics
Parameter min. typ. max. unit
Operating temperature range –30 +85 deg.C
Supply Voltage 2.7 2.8 2.85
Current Consumption 22 25 mA
Center frequency , fo 71 MHz
Insertion Gain 21 22 23 dB
Noise figure 2 3 dB
IIP3 –1 dBm
1dB Input Compression Point –11 dBm
In– / Output matching 50 ohm
IF Filter Specification
Table 26. Electrical characteristics
Parameter min. typ. max. unit
Operating temperature range –30 +85 deg.C
Center frequency , fo 71 MHz
Maximum ins. loss at 1dBBW 11 dB
Group delay ripple at 1dBBW 1.3 us pp