Radio Shack 20-427 PRO-2054, Руководство пользователя

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20-427 Owner’s Manual Draft
406–512 MHz (in 6.25 kHz steps)
806–823.9875 MHz (in 6.25 kHz steps)
849–868.9875 MHz (in 6.25 kHz steps)
894– 960 MHz (in 6.25 kHz steps)
Memory channels 300
Channel memory banks 10
Sensitivity (20 dB S/N):
FM/AM(aircraft band):
28–54
MHz 0.3 µV
108 –136.99166 MHz (AM) 1 µV
137–174 MHz 0.5 µV
406–512 MHz 0.5 µV
806–960 MHz 0.7 µV
Selectivity:
‒
6 dB ±10 kHz
‒
50 dB ±18 kHz
Spurious Rejection (at 154.1 MHz FM) 40 dB
Scanning Rate Up to 60 Channels per Second
Search Rate Up to 75 Steps per Second
Delay Time 2 seconds
Intermediate Frequencies (IF):
1
st
380.8 MHz
2
nd
21.4 MHz
3
rd
455 kHz
Priority Sampling 2 seconds
Operating Temperature –4 to 140° F (–20 to 60° C)
IF Rejection:
380.8 MHz at 154.1 MHz
60 dB
21.4 MHz at 154.1 MHz 100 dB
Squelch Sensitivity:
Threshold (FM and AM)
0.5 µV
Tight (FM) 25 dB
Tight (AM) 20 dB
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