Receiver Specifications - Codan X-2 Service Manual

X-2 Technical Service Manual
1.6.2

Receiver Specifications

Spurious Responses
Publication No: 15-02047
Type
IF Frequencies
Sensitivity
Input Protection
Selectivity
Desensitisation
Image Rejection
Cross Modulation
Blocking
Intermodulation
AGC
AF Power and
Distortion
Clarifier
Dual conversion, superheterodyne.
45 MHz and 455 kHz.
0.3(0.4) µV PD -117(-115) dBm for 10 dB
SINAD with > 50 mW audio output.
Will withstand 50 V RF from 50 Ω.
Greater than 70(65) dB at -1 kHz and +4 kHz
reference SCF USB.
Pass Band -6(-8) dB
Ripple 2(4) dB pp
10 dB SINAD reduced to 7 dB SINAD.
-1 and +4 kHz (ref SCF)
±10 kHz
±50 kHz
Better than 90(80) dB.
Better than 90(70) dB.
Self Generated Signals > 0.3 µV PD:
3652, 5478, 7304, 9130, 10956, 14608 kHz.
A signal 85(80) dB above a signal producing
10 dB SINAD, modulated 30% and removed at
least 20 kHz from the wanted signal will
produce an increase in receiver noise of less than
3 dB.
As for desensitisation.
To produce a third order intermodulation
product equivalent to a wanted signal producing
10 dB SINAD, two unwanted signals greater
than 30 kHz removed from the wanted signal
must have a level greater than 82(80) dB above
the wanted signal. Third order intercept +7(4)
dBm, not affected by AGC.
Less than 6 dB variation in output for input
variation between 1.5(2.5) µV and 100 mV PD.
Fast attack, slow release.
Ω
2.5 W into 8 5% THD
Ω
5.0 W into 4 5% THD
Ω
8.0 W into 2 5% THD.
±50 Hz up to 5 MHz
±10 ppm above 5 MHz
Clarifier is automatically reset to mid-frequency
with channel change.
Introduction 1-5
300 to 2700 Hz
500 to 2500 Hz
65(60) dB
85(80) dB
100(95) dB