Codan 2110 series, Руководство по ремонту

Страница: 161 / 164

Specifications
Manpack Transceiver 2110 series Repair Guide 129
Receiver
Table 22: Receiver specifications at 50

antenna connector
Item Specification
Type Dual conversion, superheterodyne
IF frequencies 45 MHz and 455 kHz
Sensitivity Frequency:
0.25 to 30 MHz RF amp off:
0.45 [0.28]

V PD
–114 [–118] dBm
Frequency:
1.6 to 30 MHz RF amp on:
0.22 [0.14]

V PD
–120 [–124] dBm
For 10 dB SINAD with greater than 50 mW audio output power
Input protection Will withstand 50 V p–p RF from a 50

source
Selectivity Greater than 65 [70] dB at –1 kHz and +4 kHz reference SCF USB
Maximum pass band
level variation: 8 [6] dB @ 300 to 2600 Hz
Ripple: 4 [2] dB p–p @ 500 to 2500 Hz
Desensitisation 10 dB SINAD reduced to 7 dB SINAD

1 and +4 kHz (ref SCF) USB 50 [55] dB

10 kHz 65 [70] dB

50 kHz 80 [85] dB
Blocking As for Desensitisation
For frequencies > ±50 kHz > 80 dB
Image rejection Better than 85 [90] dB
Spurious responses Better than 70 [80] dB
No more than 10 self-generated signals > 0.15

V PD
Intermodulation 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 80 [82] dB above the
wanted signal
Third order intercept (unaffected by AGC):
+10 [+13] dBm with RF amp off
+0 [+3] dBm with RF amp on
AGC Less than 6 dB variation in output for input variation between 2.0 [1.0]

V and
100 mV PD (RF amp on)
Fast attack, slow release (selectable release time)